Add support for ATMEL AT91SAM3U - CortexM3 Family
authorduane <duane@b42882b7-edfa-0310-969c-e2dbd0fdcd60>
Wed, 24 Jun 2009 02:01:14 +0000 (02:01 +0000)
committerduane <duane@b42882b7-edfa-0310-969c-e2dbd0fdcd60>
Wed, 24 Jun 2009 02:01:14 +0000 (02:01 +0000)
git-svn-id: svn://svn.berlios.de/openocd/trunk@2383 b42882b7-edfa-0310-969c-e2dbd0fdcd60

13 files changed:
doc/openocd.texi
src/flash/Makefile.am
src/flash/at91sam3.c [new file with mode: 0755]
src/flash/at91sam3.h [new file with mode: 0755]
src/flash/flash.c
tcl/board/atmel_sam3u_ek.cfg [new file with mode: 0755]
tcl/target/at91sam3u1c.cfg [new file with mode: 0755]
tcl/target/at91sam3u1e.cfg [new file with mode: 0755]
tcl/target/at91sam3u2c.cfg [new file with mode: 0755]
tcl/target/at91sam3u2e.cfg [new file with mode: 0755]
tcl/target/at91sam3u4c.cfg [new file with mode: 0755]
tcl/target/at91sam3u4e.cfg [new file with mode: 0755]
tcl/target/at91sam3uXX.cfg [new file with mode: 0755]

index 7a6b948..c586592 100644 (file)
@@ -130,7 +130,7 @@ debugged via the GDB protocol.
 
 @b{Flash Programing:} Flash writing is supported for external CFI
 compatible NOR flashes (Intel and AMD/Spansion command set) and several
-internal flashes (LPC2000, AT91SAM7, STR7x, STR9x, LM3, and
+internal flashes (LPC2000, AT91SAM7, AT91SAM3U, STR7x, STR9x, LM3, and
 STM32x). Preliminary support for various NAND flash controllers
 (LPC3180, Orion, S3C24xx, more) controller is included.
 
@@ -3374,11 +3374,68 @@ flash bank aduc702x 0 0 0 0 $_TARGETNAME
 @end example
 @end deffn
 
+@deffn {Flash Driver} at91sam3
+@cindex at91sam3
+All members of the AT91SAM3 (cortex-M3) microcontroller family from
+atmel include internal flash and use the Cortex-M3 core. The driver
+currently (6/22/09) recognizes the AT91SAM3U[1/2/4][C/E] chips. Note
+that the driver was orginaly developed and tested using the
+AT91SAM3U4E, using a SAM3U-EK eval board. Support for other chips in
+the family where cribbed from the data sheet [Note to future
+readers/updaters: Please remove this worrysome comment after other
+chips are confirmed].
+
+The AT91SAM3U4[E/C] (256K) chips have 2 flash banks, the other chips
+(3U[1/2][E/C]) have 1 flash bank, in all cases the flash banks are at
+the following fixed locations. 
+
+@example
+# Flash bank 0 - all chips
+flash bank at91sam3 0x000080000 0 1 1 $_TARGETNAME
+# Flash bank 1 - only 256K chips
+flash bank at91sam3 0x000100000 0 1 1 $_TARGETNAME
+@end example
+
+Internally, the AT91SAM3 flash memory is organized as follows:
+
+@itemize
+@item @var{N-Banks:} 256K chips have 2 banks, others have 1 bank.
+@item @var{Bank Size:}  128K/64K Per flash bank
+@item @var{Sectors:} 16 or 8 per bank
+@item @var{SectorSize:} 8K Per Sector
+@item @var{PageSize:} 256 bytes per page. Note that OpenOCD operates on 'sector' sizes, not page sizes.
+@end itemize
+
+The AT91SAM3 driver adds an additional command:
+
+@deffn Command {at91sam3 gpnvm set|clear|show all|NUMBER}
+This command allows you to set, clear, or show the state of the GPNVM bits.
+@end deffn
+
+@deffn Command {at91sam3 info}
+This command attempts to display information about the AT91SAM3
+chip. @b{First} it read the @var{CHIPID_CIDR} [address 0x400e0740, see
+Section 28.2.1, page 505 of the AT91SAM3U 29/may/2009 datasheet,
+document id: doc6430A] and decodes the values. @b{Second} it reads the
+various clock configuration registers and attempts to display how it
+believes the chip is configured. By default, the SLOWCLK is assumed to
+be 32768 Hz, see the command @b{at91sam3 slowclk}.
+@end deffn
+
+@deffn Command {at91sam3 slowclk [VALUE]}
+This command shows/sets the slow clock frequency used in the
+@b{at91sam3 info} command calculations above.
+@end deffn
+
+@end deffn
+
 @deffn {Flash Driver} at91sam7
-All members of the AT91SAM7 microcontroller family from Atmel
-include internal flash and use ARM7TDMI cores.
-The driver automatically recognizes a number of these chips using
-the chip identification register, and autoconfigures itself.
+All members of the AT91SAM7 microcontroller family from Atmel include
+internal flash and use ARM7TDMI cores.  The driver automatically
+recognizes a number of these chips using the chip identification
+register, and autoconfigures itself.
+@end deffn
+
 
 @example
 flash bank at91sam7 0 0 0 0 $_TARGETNAME
@@ -3419,7 +3476,6 @@ This assumes that the first flash bank (number 0) is associated with
 the appropriate at91sam7 target.
 @end quotation
 @end deffn
-@end deffn
 
 @deffn {Flash Driver} avr
 The AVR 8-bit microcontrollers from Atmel integrate flash memory.
index 73f02bf..60a322a 100644 (file)
@@ -11,6 +11,7 @@ libflash_la_SOURCES = \
        cfi.c \
        non_cfi.c \
        at91sam7.c \
+       at91sam3.c \
        davinci_nand.c \
        str7x.c \
        str9x.c \
@@ -42,6 +43,7 @@ noinst_HEADERS = \
        cfi.h \
        non_cfi.h \
        at91sam7.h \
+       at91sam3.h \
        str7x.h \
        str9x.h \
        nand.h \
diff --git a/src/flash/at91sam3.c b/src/flash/at91sam3.c
new file mode 100755 (executable)
index 0000000..0fedf6f
--- /dev/null
@@ -0,0 +1,2494 @@
+/***************************************************************************
+ *   Copyright (C) 2009 by Duane Ellis                                     *
+ *   openocd@duaneellis.com                                                *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS for A PARTICULAR PURPOSE.  See the         *
+ *   GNU General public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+****************************************************************************/
+
+/* Some of the the lower level code was based on code supplied by
+ * ATMEL under this copyright. */
+
+/* BEGIN ATMEL COPYRIGHT */
+/* ----------------------------------------------------------------------------
+ *         ATMEL Microcontroller Software Support 
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2009, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+/* END ATMEL COPYRIGHT */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+
+#include <stdio.h>
+#include <string.h>
+#include <stddef.h>
+#include "log.h"
+#include "types.h"
+#include "flash.h"
+#include "target.h"
+#include "membuf.h"
+#include "at91sam3.h"
+#include "time_support.h"
+
+#define REG_NAME_WIDTH  (12)
+
+
+#define FLASH_BANK0_BASE   0x00080000
+#define FLASH_BANK1_BASE   0x00100000
+
+#define        AT91C_EFC_FCMD_GETD                 (0x0) // (EFC) Get Flash Descriptor
+#define        AT91C_EFC_FCMD_WP                   (0x1) // (EFC) Write Page
+#define        AT91C_EFC_FCMD_WPL                  (0x2) // (EFC) Write Page and Lock
+#define        AT91C_EFC_FCMD_EWP                  (0x3) // (EFC) Erase Page and Write Page
+#define        AT91C_EFC_FCMD_EWPL                 (0x4) // (EFC) Erase Page and Write Page then Lock
+#define        AT91C_EFC_FCMD_EA                   (0x5) // (EFC) Erase All
+// cmd6 is not present int he at91sam3u4/2/1 data sheet table 17-2
+// #define     AT91C_EFC_FCMD_EPL                  (0x6) // (EFC) Erase plane?
+// cmd7 is not present int he at91sam3u4/2/1 data sheet table 17-2
+// #define     AT91C_EFC_FCMD_EPA                  (0x7) // (EFC) Erase pages?
+#define        AT91C_EFC_FCMD_SLB                  (0x8) // (EFC) Set Lock Bit
+#define        AT91C_EFC_FCMD_CLB                  (0x9) // (EFC) Clear Lock Bit
+#define        AT91C_EFC_FCMD_GLB                  (0xA) // (EFC) Get Lock Bit
+#define        AT91C_EFC_FCMD_SFB                  (0xB) // (EFC) Set Fuse Bit
+#define        AT91C_EFC_FCMD_CFB                  (0xC) // (EFC) Clear Fuse Bit
+#define        AT91C_EFC_FCMD_GFB                  (0xD) // (EFC) Get Fuse Bit
+#define        AT91C_EFC_FCMD_STUI                 (0xE) // (EFC) Start Read Unique ID
+#define        AT91C_EFC_FCMD_SPUI                 (0xF) // (EFC) Stop Read Unique ID
+
+#define  offset_EFC_FMR   0
+#define  offset_EFC_FCR   4
+#define  offset_EFC_FSR   8
+#define  offset_EFC_FRR   12
+
+
+static float
+_tomhz( uint32_t freq_hz )
+{
+       float f;
+
+       f = ((float)(freq_hz)) / 1000000.0;
+       return f;
+}
+
+// How the chip is configured.
+struct sam3_cfg {
+       uint32_t unique_id[4];
+
+       uint32_t slow_freq;
+       uint32_t rc_freq;
+       uint32_t mainosc_freq;
+       uint32_t plla_freq;
+       uint32_t mclk_freq;
+       uint32_t cpu_freq;
+       uint32_t fclk_freq;
+       uint32_t pclk0_freq;
+       uint32_t pclk1_freq;
+       uint32_t pclk2_freq;
+
+
+#define SAM3_CHIPID_CIDR          (0x400E0740)
+       uint32_t CHIPID_CIDR;
+#define SAM3_CHIPID_EXID          (0x400E0744)
+       uint32_t CHIPID_EXID;
+
+#define SAM3_SUPC_CR              (0x400E1210)
+       uint32_t SUPC_CR;             
+
+#define SAM3_PMC_BASE             (0x400E0400)
+#define SAM3_PMC_SCSR             (SAM3_PMC_BASE + 0x0008)
+       uint32_t PMC_SCSR;
+#define SAM3_PMC_PCSR             (SAM3_PMC_BASE + 0x0018)
+       uint32_t PMC_PCSR;
+#define SAM3_CKGR_UCKR            (SAM3_PMC_BASE + 0x001c)
+       uint32_t CKGR_UCKR;
+#define SAM3_CKGR_MOR             (SAM3_PMC_BASE + 0x0020)
+       uint32_t CKGR_MOR;
+#define SAM3_CKGR_MCFR            (SAM3_PMC_BASE + 0x0024)
+       uint32_t CKGR_MCFR;
+#define SAM3_CKGR_PLLAR           (SAM3_PMC_BASE + 0x0028)
+       uint32_t CKGR_PLLAR;
+#define SAM3_PMC_MCKR             (SAM3_PMC_BASE + 0x0030)
+       uint32_t PMC_MCKR;
+#define SAM3_PMC_PCK0             (SAM3_PMC_BASE + 0x0040)
+       uint32_t PMC_PCK0;
+#define SAM3_PMC_PCK1             (SAM3_PMC_BASE + 0x0044)
+       uint32_t PMC_PCK1;
+#define SAM3_PMC_PCK2             (SAM3_PMC_BASE + 0x0048)
+       uint32_t PMC_PCK2;
+#define SAM3_PMC_SR               (SAM3_PMC_BASE + 0x0068)
+       uint32_t PMC_SR;
+#define SAM3_PMC_IMR              (SAM3_PMC_BASE + 0x006c)
+       uint32_t PMC_IMR;
+#define SAM3_PMC_FSMR             (SAM3_PMC_BASE + 0x0070)
+       uint32_t PMC_FSMR;
+#define SAM3_PMC_FSPR             (SAM3_PMC_BASE + 0x0074)
+       uint32_t PMC_FSPR;
+};
+
+
+struct sam3_bank_private {
+       int probed;
+       // DANGER: THERE ARE DRAGONS HERE..
+       // NOTE: If you add more 'ghost' pointers
+       // be aware that you must *manually* update 
+       // these pointers in the function sam3_GetDetails()
+       // See the comment "Here there be dragons"
+
+       // so we can find the chip we belong to
+       struct sam3_chip *pChip;
+       // so we can find the orginal bank pointer 
+       flash_bank_t *pBank;
+       unsigned bank_number;
+       uint32_t controller_address;
+       uint32_t base_address;
+       bool present;
+       unsigned size_bytes;
+       unsigned nsectors;
+       unsigned sector_size;
+       unsigned page_size;
+};
+
+struct sam3_chip_details {
+       // THERE ARE DRAGONS HERE..
+       // note: If you add pointers here
+       // becareful about them as they
+       // may need to be updated inside
+       // the function: "sam3_GetDetails()
+       // which copy/overwrites the
+       // 'runtime' copy of this structure
+       uint32_t chipid_cidr;
+       const char *name;
+
+       unsigned n_gpnvms;
+#define SAM3_N_NVM_BITS 3
+       unsigned  gpnvm[SAM3_N_NVM_BITS];
+       unsigned  total_flash_size;
+       unsigned  total_sram_size;
+       unsigned  n_banks;
+#define SAM3_MAX_FLASH_BANKS 2
+       // these are "initialized" from the global const data
+       struct sam3_bank_private bank[SAM3_MAX_FLASH_BANKS];
+};
+
+
+struct sam3_chip {
+       struct sam3_chip *next;
+       int    probed;
+
+       // this is "initialized" from the global const structure
+       struct sam3_chip_details details;
+       target_t *target;
+       struct sam3_cfg cfg;
+
+       struct membuf *mbuf;
+};
+
+
+struct sam3_reg_list {
+       uint32_t address;  size_t struct_offset; const char *name;
+       void (*explain_func)( struct sam3_chip *pInfo );
+};
+
+
+static struct sam3_chip *all_sam3_chips;
+
+static struct sam3_chip *
+get_current_sam3(struct command_context_s *cmd_ctx )
+{
+       target_t *t;
+       static struct sam3_chip *p;
+
+       t = get_current_target( cmd_ctx );
+       if( !t ){
+               command_print( cmd_ctx, "No current target?");
+               return NULL;
+       }
+
+       p = all_sam3_chips;
+       if( !p ){
+               // this should not happen
+               // the command is not registered until the chip is created?
+               command_print( cmd_ctx, "No SAM3 chips exist?");
+               return NULL;
+       }
+
+       while( p ){
+               if( p->target == t ){
+                       return p;
+               }
+               p = p->next;
+       }
+       command_print( cmd_ctx, "Cannot find SAM3 chip?");
+       return NULL;
+}
+
+
+// these are used to *initialize* the "pChip->details" structure.
+static const struct sam3_chip_details all_sam3_details[] = {
+       {
+               .chipid_cidr    = 0x28100960,
+               .name           = "at91sam3u4e",
+               .total_flash_size     = 256 * 1024,
+               .total_sram_size      = 52 * 1024,
+               .n_gpnvms       = 3, 
+               .n_banks        = 2,
+
+               // System boots at address 0x0
+               // gpnvm[1] = selects boot code
+               //     if gpnvm[1] == 0
+               //         boot is via "SAMBA" (rom)
+               //     else 
+               //         boot is via FLASH
+               //         Selection is via gpnvm[2]
+               //     endif
+               //
+               // NOTE: banks 0 & 1 switch places
+               //     if gpnvm[2] == 0
+               //         Bank0 is the boot rom
+               //      else
+               //         Bank1 is the boot rom
+               //      endif
+               .bank[0] = { 
+                       .probed = 0,
+                       .pChip  = NULL,
+                       .pBank  = NULL,
+                       .bank_number = 0,
+                       .base_address = FLASH_BANK0_BASE, 
+                       .controller_address = 0x400e0800,
+                       .present = 1,
+                       .size_bytes = 128 * 1024,
+                       .nsectors   = 16,
+                       .sector_size = 8192,
+                       .page_size   = 256,
+               },
+
+               .bank[1] = {
+                       .probed = 0,
+                       .pChip  = NULL,
+                       .pBank  = NULL,
+                       .bank_number = 1,
+                       .base_address = FLASH_BANK1_BASE,
+                       .controller_address = 0x400e0a00,
+                       .present = 1,
+                       .size_bytes = 128 * 1024,
+                       .nsectors   = 16,
+                       .sector_size = 8192,
+                       .page_size   = 256,
+               },
+       },
+
+       {
+               .chipid_cidr    = 0x281a0760,
+               .name           = "at91sam3u2e",
+               .total_flash_size     = 128 * 1024,
+               .total_sram_size      =  36 * 1024,
+               .n_gpnvms       = 2, 
+               .n_banks        = 1,
+
+               // System boots at address 0x0
+               // gpnvm[1] = selects boot code
+               //     if gpnvm[1] == 0
+               //         boot is via "SAMBA" (rom)
+               //     else 
+               //         boot is via FLASH
+               //         Selection is via gpnvm[2]
+               //     endif
+               .bank[0] = { 
+                       .probed = 0,
+                       .pChip  = NULL,
+                       .pBank  = NULL,
+                       .bank_number = 0,
+                       .base_address = FLASH_BANK0_BASE, 
+                       .controller_address = 0x400e0800,
+                       .present = 1,
+                       .size_bytes = 128 * 1024,
+                       .nsectors   = 16,
+                       .sector_size = 8192,
+                       .page_size   = 256,
+               },
+
+               .bank[1] = {
+                       .present = 0,
+                       .probed = 0,
+                       .bank_number = 1,
+               },
+       },
+       {
+               .chipid_cidr    = 0x28190560,
+               .name           = "at91sam3u1e",
+               .total_flash_size     = 64 * 1024,
+               .total_sram_size      = 20 * 1024,
+               .n_gpnvms       = 2, 
+               .n_banks        = 1,
+
+               // System boots at address 0x0
+               // gpnvm[1] = selects boot code
+               //     if gpnvm[1] == 0
+               //         boot is via "SAMBA" (rom)
+               //     else 
+               //         boot is via FLASH
+               //         Selection is via gpnvm[2]
+               //     endif
+               //
+       
+               .bank[0] = { 
+                       .probed = 0,
+                       .pChip  = NULL,
+                       .pBank  = NULL,
+                       .bank_number = 0,
+                       .base_address = FLASH_BANK0_BASE, 
+                       .controller_address = 0x400e0800,
+                       .present = 1,
+                       .size_bytes =  64 * 1024,
+                       .nsectors   =  8,
+                       .sector_size = 8192,
+                       .page_size   = 256,
+               },
+
+               .bank[1] = {
+                       .present = 0,
+                       .probed = 0,
+                       .bank_number = 1,
+               },
+       },
+               
+       {
+               .chipid_cidr    = 0x28000960,
+               .name           = "at91sam3u4c",
+               .total_flash_size     = 256 * 1024,
+               .total_sram_size      = 52 * 1024,
+               .n_gpnvms       = 3, 
+               .n_banks        = 2,
+
+               // System boots at address 0x0
+               // gpnvm[1] = selects boot code
+               //     if gpnvm[1] == 0
+               //         boot is via "SAMBA" (rom)
+               //     else 
+               //         boot is via FLASH
+               //         Selection is via gpnvm[2]
+               //     endif
+               //
+               // NOTE: banks 0 & 1 switch places
+               //     if gpnvm[2] == 0
+               //         Bank0 is the boot rom
+               //      else
+               //         Bank1 is the boot rom
+               //      endif
+               .bank[0] = { 
+                       .probed = 0,
+                       .pChip  = NULL,
+                       .pBank  = NULL,
+                       .bank_number = 0,
+                       .base_address = FLASH_BANK0_BASE, 
+                       .controller_address = 0x400e0800,
+                       .present = 1,
+                       .size_bytes = 128 * 1024,
+                       .nsectors   = 16,
+                       .sector_size = 8192,
+                       .page_size   = 256,
+               },
+
+               .bank[1] = {
+                       .probed = 0,
+                       .pChip  = NULL,
+                       .pBank  = NULL,
+                       .bank_number = 1,
+                       .base_address = FLASH_BANK1_BASE,
+                       .controller_address = 0x400e0a00,
+                       .present = 1,
+                       .size_bytes = 128 * 1024,
+                       .nsectors   = 16,
+                       .sector_size = 8192,
+                       .page_size   = 256,
+               },
+       },
+
+       {
+               .chipid_cidr    = 0x280a0760,
+               .name           = "at91sam3u2c",
+               .total_flash_size     = 128 * 1024,
+               .total_sram_size      = 36 * 1024,
+               .n_gpnvms       = 2, 
+               .n_banks        = 1,
+
+               // System boots at address 0x0
+               // gpnvm[1] = selects boot code
+               //     if gpnvm[1] == 0
+               //         boot is via "SAMBA" (rom)
+               //     else 
+               //         boot is via FLASH
+               //         Selection is via gpnvm[2]
+               //     endif
+               .bank[0] = { 
+                       .probed = 0,
+                       .pChip  = NULL,
+                       .pBank  = NULL,
+                       .bank_number = 0,
+                       .base_address = FLASH_BANK0_BASE, 
+                       .controller_address = 0x400e0800,
+                       .present = 1,
+                       .size_bytes = 128 * 1024,
+                       .nsectors   = 16,
+                       .sector_size = 8192,
+                       .page_size   = 256,
+               },
+
+               .bank[1] = {
+                       .present = 0,
+                       .probed = 0,
+                       .bank_number = 1,
+               },
+       },
+       {
+               .chipid_cidr    = 0x28090560,
+               .name           = "at91sam3u1c",
+               .total_flash_size     = 64 * 1024,
+               .total_sram_size      = 20 * 1024,
+               .n_gpnvms       = 2, 
+               .n_banks        = 1,
+
+               // System boots at address 0x0
+               // gpnvm[1] = selects boot code
+               //     if gpnvm[1] == 0
+               //         boot is via "SAMBA" (rom)
+               //     else 
+               //         boot is via FLASH
+               //         Selection is via gpnvm[2]
+               //     endif
+               //
+       
+               .bank[0] = { 
+                       .probed = 0,
+                       .pChip  = NULL,
+                       .pBank  = NULL,
+                       .bank_number = 0,
+                       .base_address = FLASH_BANK0_BASE, 
+                       .controller_address = 0x400e0800,
+                       .present = 1,
+                       .size_bytes =  64 * 1024,
+                       .nsectors   =  8,
+                       .sector_size = 8192,
+                       .page_size   = 256,
+               },
+
+               .bank[1] = {
+                       .present = 0,
+                       .probed = 0,
+                       .bank_number = 1,
+               },
+       },
+
+       // terminate
+       { 
+               .chipid_cidr    = 0,
+               .name                   = NULL,
+       }
+};
+
+/* Globals above */
+/***********************************************************************
+ **********************************************************************
+ **********************************************************************
+ **********************************************************************
+ **********************************************************************
+ **********************************************************************/
+/* *ATMEL* style code - from the SAM3 driver code */
+
+/** Get the current status of the EEFC
+ *
+ * the value of some status bits (LOCKE, PROGE).
+ * @param pPrivate - info about the bank
+ * @param v        - result goes here
+ */
+static int 
+EFC_GetStatus( struct sam3_bank_private *pPrivate, uint32_t *v )
+{
+       int r;
+       r = target_read_u32( pPrivate->pChip->target, pPrivate->controller_address + offset_EFC_FSR, v );
+       LOG_DEBUG("Status: 0x%08x (lockerror: %d, cmderror: %d, ready: %d)", 
+                         (unsigned int)(*v),
+                         ((unsigned int)((*v >> 2) & 1)),
+                         ((unsigned int)((*v >> 1) & 1)),
+                         ((unsigned int)((*v >> 0) & 1)));
+                         
+       return r;
+}
+
+/** Get the result of the last executed command.
+ * @param pPrivate - info about the bank
+ * @param v        - result goes here
+ */
+static int 
+EFC_GetResult( struct sam3_bank_private *pPrivate, uint32_t *v )
+{
+       int r;
+       uint32_t rv;
+       r = target_read_u32( pPrivate->pChip->target, pPrivate->controller_address + offset_EFC_FRR, &rv );
+       if( v ){
+               *v = rv;
+       }
+       LOG_DEBUG("Result: 0x%08x", ((unsigned int)(rv)));
+       return r;
+}
+
+static int
+EFC_StartCommand(struct sam3_bank_private *pPrivate,
+                                unsigned command, unsigned argument )
+{
+       uint32_t n,v;
+       int r;
+       int retry;
+
+       retry = 0;
+ do_retry:
+
+    // Check command & argument
+    switch (command) {
+
+       case AT91C_EFC_FCMD_WP:
+       case AT91C_EFC_FCMD_WPL:
+       case AT91C_EFC_FCMD_EWP: 
+       case AT91C_EFC_FCMD_EWPL:
+               // case AT91C_EFC_FCMD_EPL:
+               // case AT91C_EFC_FCMD_EPA:
+       case AT91C_EFC_FCMD_SLB:
+       case AT91C_EFC_FCMD_CLB:
+               n = (pPrivate->size_bytes / pPrivate->page_size);
+               if( argument >= n ){
+                       LOG_ERROR("*BUG*: Embedded flash has only %u pages", (unsigned)(n));
+               }
+               break;
+               
+       case AT91C_EFC_FCMD_SFB:
+       case AT91C_EFC_FCMD_CFB:
+               if( argument >= pPrivate->pChip->details.n_gpnvms ){
+                       LOG_ERROR("*BUG*: Embedded flash has only %d GPNVMs", 
+                                         pPrivate->pChip->details.n_gpnvms );
+               }
+               break;
+               
+       case AT91C_EFC_FCMD_GETD:
+       case AT91C_EFC_FCMD_EA:
+       case AT91C_EFC_FCMD_GLB:
+       case AT91C_EFC_FCMD_GFB:
+       case AT91C_EFC_FCMD_STUI:
+       case AT91C_EFC_FCMD_SPUI:
+               if( argument != 0 ){
+                       LOG_ERROR("Argument is meaningless for cmd: %d", command );
+               }
+               break;
+       default:
+               LOG_ERROR("Unknown command %d", command);
+               break;
+    }
+
+       if( command == AT91C_EFC_FCMD_SPUI ){
+               // this is a very special situation.
+               // Situation (1) - error/retry - see below
+               //      And we are being called recursively
+               // Situation (2) - normal, finished reading unique id
+       } else {
+               // it should be "ready"
+               EFC_GetStatus( pPrivate, &v );
+               if( v & 1 ){
+                       // then it is ready
+                       // we go on
+               } else {
+                       if( retry ){
+                               // we have done this before
+                               // the controller is not responding.
+                               LOG_ERROR("flash controller(%d) is not ready! Error", pPrivate->bank_number );
+                               return ERROR_FAIL;
+                       } else {
+                               retry++;
+                               LOG_ERROR("Flash controller(%d) is not ready, attempting reset", 
+                                                 pPrivate->bank_number );
+                               // we do that by issuing the *STOP* command
+                               EFC_StartCommand( pPrivate, AT91C_EFC_FCMD_SPUI, 0 );
+                               // above is recursive, and further recursion is blocked by 
+                               // if( command == AT91C_EFC_FCMD_SPUI ) above
+                               goto do_retry;
+                       }
+               }
+       }
+
+       v = (0x5A << 24) | (argument << 8) | command;
+       LOG_DEBUG("Command: 0x%08x", ((unsigned int)(v)) );
+       r = target_write_u32( pPrivate->pBank->target, 
+                                                 pPrivate->controller_address + offset_EFC_FCR,
+                                                 v);
+       if( r != ERROR_OK ){
+               LOG_DEBUG("Error Write failed");
+       }
+       return r;
+}
+
+/** Performs the given command and wait until its completion (or an error).
+ *
+ * @param pPrivate - info about the bank
+ * @param command  - Command to perform.
+ * @param argument - Optional command argument.
+ * @param status   - put command status bits here
+ */
+static int 
+EFC_PerformCommand( struct sam3_bank_private *pPrivate, 
+                                       unsigned command, 
+                                       unsigned argument, 
+                                       uint32_t *status)
+{
+
+       int r;
+       uint32_t v;
+       long long ms_now, ms_end;
+
+       // default 
+       if( status ){
+               *status = 0;
+       }
+
+       r = EFC_StartCommand( pPrivate, command, argument );
+       if( r != ERROR_OK ){
+               return r;
+       }
+
+       ms_end = 500 + timeval_ms();
+
+
+    do {
+               r = EFC_GetStatus( pPrivate, &v );
+               if( r != ERROR_OK ){
+                       return r;
+               }
+               ms_now = timeval_ms();
+               if( ms_now > ms_end ){
+                       // error
+                       LOG_ERROR("Command timeout");
+                       return ERROR_FAIL;
+               }
+    }
+    while ( (v & 1) == 0 )
+               ;
+
+       // error bits..
+       if( status ){
+               *status = (v & 0x6);
+       }
+       return ERROR_OK;
+
+}
+
+
+
+
+
+/** Read the unique ID.
+ * 
+ * \param pPrivate - info about the bank
+ *
+ * The unique ID is stored in the 'pPrivate' structure.
+ */
+
+static int
+FLASHD_ReadUniqueID ( struct sam3_bank_private *pPrivate )
+{
+       int r;
+       uint32_t v;
+       int x;
+       // assume 0
+    pPrivate->pChip->cfg.unique_id[0] = 0;
+    pPrivate->pChip->cfg.unique_id[1] = 0;
+    pPrivate->pChip->cfg.unique_id[2] = 0;
+    pPrivate->pChip->cfg.unique_id[3] = 0;
+
+       LOG_DEBUG("Begin");
+       r = EFC_StartCommand( pPrivate, AT91C_EFC_FCMD_STUI, 0);
+       if( r < 0 ){
+               return r;
+       }
+
+       for( x = 0 ; x < 4 ; x++ ){
+               r = target_read_u32( pPrivate->pChip->target, 
+                                                        pPrivate->pBank->base + (x * 4),
+                                                        &v );
+               if( r < 0 ){
+                       return r;
+               }
+               pPrivate->pChip->cfg.unique_id[x] = v;
+       }
+
+    r = EFC_PerformCommand( pPrivate, AT91C_EFC_FCMD_SPUI, 0, NULL );
+       LOG_DEBUG("End: R=%d, id=0x%08x, 0x%08x, 0x%08x, 0x%08x",
+                         r, 
+                         (unsigned int)(pPrivate->pChip->cfg.unique_id[0]),
+                         (unsigned int)(pPrivate->pChip->cfg.unique_id[1]),
+                         (unsigned int)(pPrivate->pChip->cfg.unique_id[2]),
+                         (unsigned int)(pPrivate->pChip->cfg.unique_id[3]));
+       return r;
+       
+}
+
+/** Erases the entire flash.
+ * @param pPrivate - the info about the bank.
+ */
+static int
+FLASHD_EraseEntireBank( struct sam3_bank_private *pPrivate )
+{
+       LOG_DEBUG("Here");
+       return EFC_PerformCommand( pPrivate, AT91C_EFC_FCMD_EA, 0, NULL );
+}
+
+
+
+/** Gets current GPNVM state.
+ * @param pPrivate - info about the bank.
+ * @param gpnvm    -  GPNVM bit index.
+ * @param puthere  - result stored here.
+ *
+ */
+//------------------------------------------------------------------------------
+static int 
+FLASHD_GetGPNVM( struct sam3_bank_private *pPrivate, unsigned gpnvm, unsigned *puthere)
+{
+       uint32_t v;
+       int r;
+
+       LOG_DEBUG("Here");
+       if( pPrivate->bank_number != 0 ){
+               LOG_ERROR("GPNVM only works with Bank0");
+               return ERROR_FAIL;
+       }
+
+       if( gpnvm >= pPrivate->pChip->details.n_gpnvms ){
+               LOG_ERROR("Invalid GPNVM %d, max: %d, ignored",
+                                 gpnvm,pPrivate->pChip->details.n_gpnvms );
+               return ERROR_FAIL;
+       }
+
+    // Get GPNVMs status
+       r = EFC_PerformCommand( pPrivate, AT91C_EFC_FCMD_GFB, 0, NULL );
+       if( r != ERROR_OK ){
+               LOG_ERROR("Failed");
+               return r;
+       }
+
+    r = EFC_GetResult(pPrivate, &v );
+
+       if( puthere ){
+               // Check if GPNVM is set
+               // get the bit and make it a 0/1 
+               *puthere = (v >> gpnvm) & 1;
+       }
+
+       return r;
+}
+
+
+
+
+/** Clears the selected GPNVM bit.
+ * @param gpnvm  GPNVM index.
+ *
+ * Returns 0 if successful; otherwise returns an error code.
+ */
+static int 
+FLASHD_ClrGPNVM( struct sam3_bank_private *pPrivate, unsigned gpnvm)
+{
+       int r;
+       unsigned v;
+
+       LOG_DEBUG("Here");
+       if( pPrivate->bank_number != 0 ){
+               LOG_ERROR("GPNVM only works with Bank0");
+               return ERROR_FAIL;
+       }
+
+       if( gpnvm >= pPrivate->pChip->details.n_gpnvms ){
+               LOG_ERROR("Invalid GPNVM %d, max: %d, ignored",
+                                 gpnvm,pPrivate->pChip->details.n_gpnvms );
+               return ERROR_FAIL;
+       }
+
+       r = FLASHD_GetGPNVM( pPrivate, gpnvm, &v );
+       if( r != ERROR_OK ){
+               LOG_DEBUG("Failed: %d",r);
+               return r;
+       }
+       r = EFC_PerformCommand( pPrivate, AT91C_EFC_FCMD_CFB, gpnvm, NULL);
+       LOG_DEBUG("End: %d",r);
+       return r;
+}
+
+
+
+/** Sets the selected GPNVM bit.
+ *  @param gpnvm  GPNVM index.
+ *
+ */
+static int 
+FLASHD_SetGPNVM( struct sam3_bank_private *pPrivate, unsigned gpnvm)
+{
+       int r;
+       unsigned v;
+
+       if( pPrivate->bank_number != 0 ){
+               LOG_ERROR("GPNVM only works with Bank0");
+               return ERROR_FAIL;
+       }
+
+       if( gpnvm >= pPrivate->pChip->details.n_gpnvms ){
+               LOG_ERROR("Invalid GPNVM %d, max: %d, ignored",
+                                 gpnvm,pPrivate->pChip->details.n_gpnvms );
+               return ERROR_FAIL;
+       }
+
+       r = FLASHD_GetGPNVM( pPrivate, gpnvm, &v );
+       if( r != ERROR_OK ){
+               return r;
+       }
+       if( v ){
+               // already set
+               r = ERROR_OK;
+       } else {
+               // set it
+               r = EFC_PerformCommand( pPrivate, AT91C_EFC_FCMD_SFB, gpnvm, NULL );
+       }
+       return r;
+}
+
+
+/** Returns a bit field (at most 64) of locked regions within a page.
+ * @param pPrivate - info about the bank
+ * @param v        - where to store locked bits
+ * \param end  End address of range.
+ */
+
+static int 
+FLASHD_GetLockBits(struct sam3_bank_private *pPrivate, uint32_t *v )
+{
+       int r;
+       LOG_DEBUG("Here");
+    r = EFC_PerformCommand( pPrivate, AT91C_EFC_FCMD_GLB, 0, NULL);
+       if( r == ERROR_OK ){
+               r = EFC_GetResult(pPrivate, v );
+       }
+       LOG_DEBUG("End: %d",r);
+       return r;
+}
+
+
+/**Unlocks all the regions in the given address range. 
+ *
+ * \param start_sector - first sector to unlock
+ * \param end_sector   - last (inclusive) to unlock
+ */
+
+static int
+FLASHD_Unlock( struct sam3_bank_private *pPrivate,
+                          unsigned start_sector,
+                          unsigned end_sector )
+{
+       int r;
+       uint32_t status;
+       uint32_t pg;
+       uint32_t pages_per_sector;
+
+       pages_per_sector = pPrivate->sector_size / pPrivate->page_size;
+
+    /* Unlock all pages */
+    while (start_sector <= end_sector){
+               pg = start_sector * pages_per_sector;
+
+        r = EFC_PerformCommand(pPrivate, AT91C_EFC_FCMD_CLB, pg, &status );
+        if (r != ERROR_OK) {
+            return r;
+        }
+        start_sector++;
+    }
+
+    return ERROR_OK;
+}
+
+
+/** Locks regions
+ *
+ * @param start_sector - first sector to lock
+ * @param end_sector   - last sector (inclusive) to lock
+ */
+
+
+static int 
+FLASHD_Lock( struct sam3_bank_private *pPrivate,
+                        unsigned start_sector,
+                        unsigned end_sector )
+{
+       uint32_t status;
+       uint32_t pg;
+       uint32_t pages_per_sector;
+       int r;
+
+       pages_per_sector = pPrivate->sector_size / pPrivate->page_size;
+       
+    /* Lock all pages */
+    while (start_sector <= end_sector){
+               pg = start_sector * pages_per_sector;
+
+        r = EFC_PerformCommand(pPrivate, AT91C_EFC_FCMD_SLB, pg, &status );
+        if (r != ERROR_OK) {
+            return r;
+        }
+        start_sector++;
+    }
+    return ERROR_OK;
+}
+
+
+/****** END SAM3 CODE ********/
+
+/* begin helpful debug code */
+
+static void
+sam3_sprintf( struct sam3_chip *pChip , const char *fmt, ... )
+{
+       va_list ap;
+       va_start(ap,fmt);
+       if( pChip->mbuf == NULL ){
+               return;
+       }
+
+       membuf_vsprintf( pChip->mbuf, fmt, ap );
+       va_end(ap);
+}
+
+// print the fieldname, the field value, in dec & hex, and return field value
+static uint32_t 
+sam3_reg_fieldname( struct sam3_chip *pChip, 
+                                       const char *regname,
+                                       uint32_t value,
+                                       unsigned shift,
+                                       unsigned width)
+{
+       uint32_t v;
+       int hwidth, dwidth;
+
+
+       // extract the field
+       v = value >> shift;
+       v = v & ((1 << width)-1);
+       if( width <= 16 ){
+               hwidth = 4;
+               dwidth = 5;
+       } else {
+               hwidth = 8;
+               dwidth = 12;
+       }
+       
+       // show the basics
+       sam3_sprintf( pChip, "\t%*s: %*d [0x%0*x] ", 
+                                 REG_NAME_WIDTH, regname,
+                                 dwidth, v,
+                                 hwidth, v  );
+       return v;
+}
+
+
+static const char _unknown[] = "unknown";
+static const char * const eproc_names[] = {
+       _unknown,                                       // 0
+       "arm946es",                                     // 1
+       "arm7tdmi",                                     // 2 
+       "cortex-m3",                            // 3
+       "arm920t",                                      // 4
+       "arm926ejs",                            // 5
+       _unknown,                                       // 6
+       _unknown,                                       // 7
+       _unknown,                                       // 8
+       _unknown,                                       // 9
+       _unknown,                                       // 10
+       _unknown,                                       // 11
+       _unknown,                                       // 12
+       _unknown,                                       // 13
+       _unknown,                                       // 14
+       _unknown,                                       // 15
+};
+
+#define nvpsize2 nvpsize               // these two tables are identical
+static const char * const nvpsize[] = {
+       "none",                                         //  0
+       "8K bytes",                                     //  1
+       "16K bytes",                            //  2
+       "32K bytes",                            //  3
+       _unknown,                                       //  4
+       "64K bytes",                            //  5
+       _unknown,                                       //  6
+       "128K bytes",                           //  7
+       _unknown,                                       //  8
+       "256K bytes",                           //  9
+       "512K bytes",                           // 10
+       _unknown,                                       // 11
+       "1024K bytes",                          // 12
+       _unknown,                                       // 13
+       "2048K bytes",                          // 14
+       _unknown,                                       // 15
+};
+
+
+static const char * const sramsize[] = {
+       "48K Bytes",                            //  0
+       "1K Bytes",                                     //  1
+       "2K Bytes",                                     //  2
+       "6K Bytes",                                     //  3 
+       "112K Bytes",                           //  4
+       "4K Bytes",                                     //  5
+       "80K Bytes",                            //  6
+       "160K Bytes",                           //  7
+       "8K Bytes",                                     //  8 
+       "16K Bytes",                            //  9 
+       "32K Bytes",                            // 10
+       "64K Bytes",                            // 11
+       "128K Bytes",                           // 12
+       "256K Bytes",                           // 13
+       "96K Bytes",                            // 14
+       "512K Bytes",                           // 15
+
+};
+
+static const struct archnames { unsigned value; const char *name; } archnames[] = {
+       { 0x19,  "AT91SAM9xx Series"                                            },
+       { 0x29,  "AT91SAM9XExx Series"                                          },
+       { 0x34,  "AT91x34 Series"                                                       },
+       { 0x37,  "CAP7 Series"                                                          },
+       { 0x39,  "CAP9 Series"                                                          },
+       { 0x3B,  "CAP11 Series"                                                         },
+       { 0x40,  "AT91x40 Series"                                                       },
+       { 0x42,  "AT91x42 Series"                                                       },
+       { 0x55,  "AT91x55 Series"                                                       },
+       { 0x60,  "AT91SAM7Axx Series"                                           },
+       { 0x61,  "AT91SAM7AQxx Series"                                          },
+       { 0x63,  "AT91x63 Series"                                                       },
+       { 0x70,  "AT91SAM7Sxx Series"                                           },
+       { 0x71,  "AT91SAM7XCxx Series"                                          },
+       { 0x72,  "AT91SAM7SExx Series"                                          },
+       { 0x73,  "AT91SAM7Lxx Series"                                           },
+       { 0x75,  "AT91SAM7Xxx Series"                                           },
+       { 0x76,  "AT91SAM7SLxx Series"                                          },
+       { 0x80,  "ATSAM3UxC Series (100-pin version)"           },
+       { 0x81,  "ATSAM3UxE Series (144-pin version)"           },
+       { 0x83,  "ATSAM3AxC Series (100-pin version)"           },
+       { 0x84,  "ATSAM3XxC Series (100-pin version)"           },
+       { 0x85,  "ATSAM3XxE Series (144-pin version)"           },
+       { 0x86,  "ATSAM3XxG Series (208/217-pin version)"       },
+       { 0x88,  "ATSAM3SxA Series (48-pin version)"            },
+       { 0x89,  "ATSAM3SxB Series (64-pin version)"            },
+       { 0x8A,  "ATSAM3SxC Series (100-pin version)"           },
+       { 0x92,  "AT91x92 Series"                                                       },
+       { 0xF0,  "AT75Cxx Series"                                                       },
+       { -1, NULL },
+
+};
+
+static const char * const nvptype[] = {
+       "rom", // 0
+       "romless or onchip flash", // 1
+       "embedded flash memory", // 2
+       "rom(nvpsiz) + embedded flash (nvpsiz2)", //3
+       "sram emulating flash", // 4
+       _unknown, // 5
+       _unknown, // 6
+       _unknown, // 7  
+       
+};
+
+static const char *_yes_or_no( uint32_t v )
+{
+       if( v ){
+               return "YES";
+       } else {
+               return "NO";
+       }
+}
+
+static const char * const _rc_freq[] = {
+       "4 MHz", "8 MHz", "12 MHz", "reserved"
+};
+
+static void 
+sam3_explain_ckgr_mor(  struct sam3_chip *pChip )
+{
+       uint32_t v;
+       uint32_t rcen;
+
+       v = sam3_reg_fieldname(pChip, "MOSCXTEN", pChip->cfg.CKGR_MOR, 0, 1 );
+       sam3_sprintf( pChip, "(main xtal enabled: %s)\n",
+                                 _yes_or_no(v) );
+       v = sam3_reg_fieldname(pChip, "MOSCXTBY", pChip->cfg.CKGR_MOR, 1, 1 ); 
+       sam3_sprintf( pChip, "(main osc bypass: %s)\n",
+                                 _yes_or_no(v) );
+       rcen = sam3_reg_fieldname(pChip, "MOSCRCEN", pChip->cfg.CKGR_MOR, 2, 1 );
+       sam3_sprintf( pChip, "(onchip RC-OSC enabled: %s)\n",
+                                 _yes_or_no(rcen) );
+       v = sam3_reg_fieldname(pChip, "MOSCRCF", pChip->cfg.CKGR_MOR, 4, 3 );
+       sam3_sprintf( pChip, "(onchip RC-OSC freq: %s)\n",
+                                 _rc_freq[v] );
+
+       pChip->cfg.rc_freq = 0;
+       if( rcen ){
+               switch( v ){
+               default:
+                       pChip->cfg.rc_freq = 0;
+               case 0:
+                       pChip->cfg.rc_freq = 4 * 1000 * 1000;
+                       break;
+               case 1:
+                       pChip->cfg.rc_freq = 8 * 1000 * 1000;
+                       break;
+               case 2:
+                       pChip->cfg.rc_freq = 12* 1000 * 1000;
+                       break;
+               }
+       }
+
+       v = sam3_reg_fieldname(pChip,"MOSCXTST", pChip->cfg.CKGR_MOR, 8, 8 );
+       sam3_sprintf( pChip, "(startup clks, time= %f uSecs)\n",
+                                 ((float)(v * 1000000)) / ((float)(pChip->cfg.slow_freq)));
+       v = sam3_reg_fieldname(pChip, "MOSCSEL", pChip->cfg.CKGR_MOR, 24, 1 );
+       sam3_sprintf( pChip, "(mainosc source: %s)\n",
+                                 v ? "external xtal" : "internal RC");
+       
+       v = sam3_reg_fieldname(pChip,"CFDEN", pChip->cfg.CKGR_MOR, 25, 1 );
+       sam3_sprintf(pChip, "(clock failure enabled: %s)\n",
+                                _yes_or_no(v));
+}
+
+       
+
+static void 
+sam3_explain_chipid_cidr( struct sam3_chip *pChip )
+{
+       int x;
+       uint32_t v;
+       const char *cp;
+
+       sam3_reg_fieldname( pChip, "Version", pChip->cfg.CHIPID_CIDR, 0, 5 );
+       sam3_sprintf(pChip,"\n");
+
+       v = sam3_reg_fieldname( pChip, "EPROC", pChip->cfg.CHIPID_CIDR, 5, 3 );
+       sam3_sprintf( pChip, "%s\n", eproc_names[v]);
+       
+       v = sam3_reg_fieldname( pChip, "NVPSIZE", pChip->cfg.CHIPID_CIDR, 8, 4 );
+       sam3_sprintf( pChip, "%s\n", nvpsize[v]);
+
+       v = sam3_reg_fieldname( pChip, "NVPSIZE2", pChip->cfg.CHIPID_CIDR, 12, 4 );
+       sam3_sprintf( pChip, "%s\n", nvpsize2[v]);
+
+       v = sam3_reg_fieldname( pChip, "SRAMSIZE", pChip->cfg.CHIPID_CIDR, 16,4 );
+       sam3_sprintf( pChip, "%s\n", sramsize[ v ] );
+
+       v = sam3_reg_fieldname( pChip, "ARCH", pChip->cfg.CHIPID_CIDR, 20, 8 );
+       cp = _unknown;
+       for( x = 0 ; archnames[x].name ; x++ ){
+               if( v == archnames[x].value ){
+                       cp = archnames[x].name;
+                       break;
+               }
+       }
+       
+       sam3_sprintf( pChip, "%s\n", cp );
+
+       v = sam3_reg_fieldname( pChip, "NVPTYP", pChip->cfg.CHIPID_CIDR, 28, 3 );
+       sam3_sprintf( pChip, "%s\n", nvptype[ v ] );
+
+       v = sam3_reg_fieldname( pChip, "EXTID", pChip->cfg.CHIPID_CIDR, 31, 1 );
+       sam3_sprintf(pChip, "(exists: %s)\n", _yes_or_no(v));
+}
+
+static void 
+sam3_explain_ckgr_mcfr( struct sam3_chip *pChip )
+{
+       uint32_t v;
+
+       
+       v = sam3_reg_fieldname( pChip, "MAINFRDY", pChip->cfg.CKGR_MCFR, 16, 1 );
+       sam3_sprintf( pChip, "(main ready: %s)\n", _yes_or_no( v ));
+
+       v = sam3_reg_fieldname( pChip, "MAINF", pChip->cfg.CKGR_MCFR, 0, 16 );
+       
+       v = (v * pChip->cfg.slow_freq) / 16;
+       pChip->cfg.mainosc_freq = v;
+
+       sam3_sprintf(pChip, "(%3.03f Mhz (%d.%03dkhz slowclk)\n",
+                                _tomhz( v ),
+                                pChip->cfg.slow_freq / 1000,
+                                pChip->cfg.slow_freq % 1000);
+
+}
+
+static void
+sam3_explain_ckgr_plla( struct sam3_chip *pChip )
+{
+       uint32_t mula,diva;
+
+       diva = sam3_reg_fieldname( pChip, "DIVA", pChip->cfg.CKGR_PLLAR, 0, 8 );
+       sam3_sprintf(pChip,"\n");
+       mula = sam3_reg_fieldname( pChip, "MULA", pChip->cfg.CKGR_PLLAR, 16, 11 );
+       sam3_sprintf(pChip,"\n");
+       pChip->cfg.plla_freq = 0;
+       if( mula==0 ){
+               sam3_sprintf(pChip,"\tPLLA Freq: (Disabled,mula=0)\n");
+       } else if( diva == 0 ){
+               sam3_sprintf(pChip,"\tPLLA Freq: (Disabled,diva=0)\n");
+       } else if( diva == 1 ){
+               pChip->cfg.plla_freq = (pChip->cfg.mainosc_freq * (mula+1));
+               sam3_sprintf(pChip,"\tPLLA Freq: %3.03f MHz\n",
+                                        _tomhz( pChip->cfg.plla_freq ));
+       }
+}
+               
+               
+static void
+sam3_explain_mckr( struct sam3_chip *pChip )
+{
+       uint32_t css, pres,fin;
+       int pdiv;
+       const char *cp;
+
+       css = sam3_reg_fieldname( pChip, "CSS", pChip->cfg.PMC_MCKR, 0, 2 );
+       switch( css & 3 ){
+       case 0:
+               fin = pChip->cfg.slow_freq;
+               cp = "slowclk";
+               break;
+       case 1:
+               fin = pChip->cfg.mainosc_freq;
+               cp  = "mainosc";
+               break;
+       case 2:
+               fin = pChip->cfg.plla_freq;
+               cp  = "plla";
+               break;
+       case 3:
+               if( pChip->cfg.CKGR_UCKR & (1 << 16) ){
+                       fin = 480 * 1000 * 1000;
+                       cp = "upll";
+               } else {
+                       fin = 0;
+                       cp  = "upll (*ERROR* UPLL is disabled)";
+               }
+               break;
+       }
+
+       sam3_sprintf( pChip, "%s (%3.03f Mhz)\n",
+                                 cp, 
+                                 _tomhz( fin ) );
+       pres = sam3_reg_fieldname(pChip, "PRES", pChip->cfg.PMC_MCKR, 4, 3 );
+       switch( pres & 0x07 ){
+       case 0:
+               pdiv = 1;
+               cp = "selected clock";
+       case 1:
+               pdiv = 2;
+               cp = "clock/2";
+               break;
+       case 2:
+               pdiv = 4;
+               cp = "clock/4";
+               break;
+       case 3:
+               pdiv = 8;
+               cp = "clock/8";
+               break;
+       case 4:
+               pdiv = 16;
+               cp = "clock/16";
+               break;
+       case 5:
+               pdiv = 32;
+               cp = "clock/32";
+               break;
+       case 6:
+               pdiv = 64;
+               cp = "clock/64";
+               break;
+       case 7:
+               pdiv = 6;
+               cp = "clock/6";
+               break;
+       }
+       sam3_sprintf( pChip, "(%s)\n", cp );
+       fin = fin / pdiv;
+       // sam3 has a *SINGLE* clock - 
+       // other at91 series parts have divisors for these.
+       pChip->cfg.cpu_freq = fin;
+       pChip->cfg.mclk_freq = fin;
+       pChip->cfg.fclk_freq = fin;
+       sam3_sprintf( pChip, "\t\tResult CPU Freq: %3.03f\n",
+                                 _tomhz( fin ) );
+}
+       
+#if 0
+static struct sam3_chip *
+target2sam3( target_t *pTarget )
+{
+       struct sam3_chip *pChip;
+
+       if(pTarget == NULL ){
+               return NULL;
+       }
+
+       pChip = all_sam3_chips;
+       while(pChip){
+               if(pChip->target == pTarget ){
+                       break; // return below
+               } else {
+                       pChip = pChip->next;
+               }
+       }
+       return pChip;
+}
+#endif
+
+static uint32_t *
+sam3_get_reg_ptr( struct sam3_cfg *pCfg, const struct sam3_reg_list *pList )
+{
+       // this function exists to help 
+       // keep funky offsetof() errors
+       // and casting from causing bugs
+
+       // By using prototypes - we can detect what would
+       // be casting errors.
+
+       return ((uint32_t *)(  ((char *)(pCfg)) + pList->struct_offset ));
+}
+       
+       
+#define SAM3_ENTRY( NAME, FUNC )  { .address = SAM3_ ## NAME, .struct_offset = offsetof( struct sam3_cfg, NAME ), #NAME, FUNC }
+static const struct sam3_reg_list sam3_all_regs[] = {
+       SAM3_ENTRY( CKGR_MOR , sam3_explain_ckgr_mor ),
+       SAM3_ENTRY( CKGR_MCFR , sam3_explain_ckgr_mcfr ),
+       SAM3_ENTRY( CKGR_PLLAR , sam3_explain_ckgr_plla ),
+       SAM3_ENTRY( CKGR_UCKR , NULL ),
+       SAM3_ENTRY( PMC_FSMR , NULL ),
+       SAM3_ENTRY( PMC_FSPR , NULL ),
+       SAM3_ENTRY( PMC_IMR , NULL ),
+       SAM3_ENTRY( PMC_MCKR , sam3_explain_mckr ),
+       SAM3_ENTRY( PMC_PCK0 , NULL ),
+       SAM3_ENTRY( PMC_PCK1 , NULL ),
+       SAM3_ENTRY( PMC_PCK2 , NULL ),
+       SAM3_ENTRY( PMC_PCSR , NULL ),
+       SAM3_ENTRY( PMC_SCSR , NULL ),
+       SAM3_ENTRY( PMC_SR , NULL ),
+       SAM3_ENTRY( CHIPID_CIDR , sam3_explain_chipid_cidr ),
+       SAM3_ENTRY( CHIPID_EXID , NULL ),
+       SAM3_ENTRY( SUPC_CR, NULL ),
+
+       // TERMINATE THE LIST
+       { .name = NULL }
+};
+#undef SAM3_ENTRY
+
+
+
+
+static struct sam3_bank_private *
+get_sam3_bank_private( flash_bank_t *bank )
+{
+       return (struct sam3_bank_private *)(bank->driver_priv);
+}
+
+/*
+ * Given a pointer to where it goes in the structure..
+ *    Determine the register name, address from the all registers table.
+ */
+static const struct sam3_reg_list *
+sam3_GetReg( struct sam3_chip *pChip, uint32_t *goes_here )
+{
+       const struct sam3_reg_list *pReg;
+
+       pReg = &(sam3_all_regs[0]);
+       while(pReg->name){
+               uint32_t *pPossible;
+
+               // calculate where this one go..
+               // it is "possibly" this register.
+               
+               pPossible = ((uint32_t *)( ((char *)(&(pChip->cfg))) + pReg->struct_offset ));
+
+               // well? Is it this register
+               if( pPossible == goes_here ){
+                       // Jump for joy!
+                       return pReg;
+               }
+
+               // next...
+               pReg++;
+       }
+       // This is *TOTAL*PANIC* - we are totally screwed.
+       LOG_ERROR("INVALID SAM3 REGISTER");
+       return NULL;
+}
+
+
+static int
+sam3_ReadThisReg( struct sam3_chip *pChip, uint32_t *goes_here )
+{
+       const struct sam3_reg_list *pReg;
+       int r;
+
+       pReg = sam3_GetReg( pChip, goes_here );
+       if( !pReg ){
+               return ERROR_FAIL;
+       }
+
+       r = target_read_u32( pChip->target, pReg->address, goes_here );
+       if( r != ERROR_OK ){
+               LOG_ERROR("Cannot read SAM3 register: %s @ 0x%08x, Err: %d\n",
+                                 pReg->name, (unsigned)(pReg->address), r );
+       }
+       return r;
+}
+               
+       
+
+static int
+sam3_ReadAllRegs( struct sam3_chip *pChip )
+{
+       int r;
+       const struct sam3_reg_list *pReg;
+
+       pReg = &(sam3_all_regs[0]);
+       while( pReg->name ){
+               r = sam3_ReadThisReg( pChip, 
+                                                                 sam3_get_reg_ptr( &(pChip->cfg), pReg ) );
+               if( r != ERROR_OK ){
+                       LOG_ERROR("Cannot read SAM3 registere: %s @ 0x%08x, Error: %d\n",
+                                         pReg->name, ((unsigned)(pReg->address)), r );
+                       return r;
+               }
+               
+               pReg++;
+       }
+
+       return ERROR_OK;
+}
+
+
+static int
+sam3_GetInfo( struct sam3_chip *pChip )
+{
+       const struct sam3_reg_list *pReg;
+       uint32_t regval;
+
+       membuf_reset( pChip->mbuf );
+
+
+       pReg = &(sam3_all_regs[0]);
+       while(pReg->name){
+               // display all regs
+               LOG_DEBUG("Start: %s", pReg->name );
+               regval = *sam3_get_reg_ptr( &(pChip->cfg), pReg );
+               sam3_sprintf(pChip, "%*s: [0x%08x] -> 0x%08x\n", 
+                                        REG_NAME_WIDTH,
+                                        pReg->name,
+                                        pReg->address,
+                                        regval );
+               if( pReg->explain_func ){
+                       (*(pReg->explain_func))( pChip );
+               }
+               LOG_DEBUG("End: %s", pReg->name );
+               pReg++;
+       }
+       sam3_sprintf(pChip,"   rc-osc: %3.03f MHz\n", _tomhz( pChip->cfg.rc_freq                ));
+       sam3_sprintf(pChip,"  mainosc: %3.03f MHz\n", _tomhz( pChip->cfg.mainosc_freq   ));
+       sam3_sprintf(pChip,"     plla: %3.03f MHz\n", _tomhz( pChip->cfg.plla_freq              ));
+       sam3_sprintf(pChip," cpu-freq: %3.03f MHz\n", _tomhz( pChip->cfg.cpu_freq               ));
+       sam3_sprintf(pChip,"mclk-freq: %3.03f MHz\n", _tomhz( pChip->cfg.mclk_freq              ));     
+
+
+       sam3_sprintf( pChip, " UniqueId: 0x%08x 0x%08x 0x%08x 0x%08x\n",
+                                 pChip->cfg.unique_id[0],
+                                 pChip->cfg.unique_id[1],
+                                 pChip->cfg.unique_id[2],
+                                 pChip->cfg.unique_id[3]);
+
+       
+       return ERROR_OK;
+}
+
+       
+static int 
+sam3_erase_check(struct flash_bank_s *bank)
+{
+       int x;
+
+       LOG_DEBUG("Here");
+       if (bank->target->state != TARGET_HALTED) {
+               LOG_ERROR("Target not halted");
+               return ERROR_TARGET_NOT_HALTED;
+       }
+       if( 0 == bank->num_sectors ){
+               LOG_ERROR("Target: not supported/not probed\n");
+               return ERROR_FAIL;
+       }
+
+       LOG_INFO("sam3 - supports auto-erase, erase_check ignored");
+       for( x = 0 ; x < bank->num_sectors ; x++ ){
+               bank->sectors[x].is_erased = 1;
+       }
+
+       LOG_DEBUG("Done");
+       return ERROR_OK;
+}
+
+static int 
+sam3_protect_check(struct flash_bank_s *bank)
+{
+       int r;
+       uint32_t v;
+       unsigned x;
+       struct sam3_bank_private *pPrivate;
+
+       LOG_DEBUG("Begin");
+       if (bank->target->state != TARGET_HALTED) {
+               LOG_ERROR("Target not halted");
+               return ERROR_TARGET_NOT_HALTED;
+       }
+
+       pPrivate = get_sam3_bank_private(bank);
+       if( !pPrivate ){
+               LOG_ERROR("no private for this bank?");
+               return ERROR_FAIL;
+       }
+       if( !(pPrivate->probed) ){
+               return ERROR_FLASH_BANK_NOT_PROBED;
+       }
+       
+       r = FLASHD_GetLockBits( pPrivate , &v );
+       if( r != ERROR_OK ){
+               LOG_DEBUG("Failed: %d",r);
+               return r;
+       }
+
+       for( x = 0 ; x < pPrivate->nsectors ; x++ ){
+               bank->sectors[x].is_protected = (!!(v & (1 << x)));
+       }
+       LOG_DEBUG("Done");
+       return ERROR_OK;
+}
+
+static int 
+sam3_flash_bank_command(struct command_context_s *cmd_ctx, 
+                           char *cmd, 
+                           char **args, 
+                           int argc, 
+                           struct flash_bank_s *bank)
+{
+       struct sam3_chip *pChip;
+
+       pChip = all_sam3_chips;
+       
+       // is this an existing chip?
+       while(pChip){
+               if( pChip->target == bank->target ){
+                       break;
+               }
+               pChip = pChip->next;
+       }
+
+       if( !pChip ){
+               // this is a *NEW* chip
+               pChip = calloc( 1, sizeof(struct sam3_chip) );
+               if( !pChip ){
+                       LOG_ERROR("NO RAM!");
+                       return ERROR_FAIL;
+               }
+               pChip->target = bank->target;
+               // insert at head
+               pChip->next = all_sam3_chips;
+               all_sam3_chips = pChip;
+               pChip->target = bank->target;
+               // assumption is this runs at 32khz
+               pChip->cfg.slow_freq = 32768;
+               pChip->probed = 0;
+               pChip->mbuf = membuf_new();
+               if( !(pChip->mbuf) ){
+                       LOG_ERROR("no memory");
+                       return ERROR_FAIL;
+               }
+       }
+       
+       switch( bank->base ){
+       default:
+               LOG_ERROR("Address 0x%08x invalid bank address (try 0x%08x or 0x%08x)",
+                                 ((unsigned int)(bank->base)),
+                                 ((unsigned int)(FLASH_BANK0_BASE)),
+                                 ((unsigned int)(FLASH_BANK1_BASE)));
+               return ERROR_FAIL;
+               break;
+       case FLASH_BANK0_BASE:
+               bank->driver_priv = &(pChip->details.bank[0]);
+               bank->bank_number = 0;
+               pChip->details.bank[0].pChip = pChip;
+               pChip->details.bank[0].pBank = bank;
+               break;
+       case FLASH_BANK1_BASE:
+               bank->driver_priv = &(pChip->details.bank[1]);
+               bank->bank_number = 1;
+               pChip->details.bank[1].pChip = pChip;
+               pChip->details.bank[1].pBank = bank;
+               break;
+       }
+
+       // we initialize after probing.
+       return ERROR_OK;
+}
+
+static int
+sam3_GetDetails( struct sam3_bank_private *pPrivate )
+{
+       const struct sam3_chip_details *pDetails;
+       struct sam3_chip *pChip;
+       void *vp;
+       flash_bank_t *saved_banks[SAM3_MAX_FLASH_BANKS];
+
+       unsigned x;
+       const char *cp;
+
+       LOG_DEBUG("Begin");
+       pDetails = all_sam3_details;
+       while( pDetails->name ){
+               if( pDetails->chipid_cidr == pPrivate->pChip->cfg.CHIPID_CIDR ){
+                       break;
+               } else {
+                       pDetails++;
+               }
+       }
+       if( pDetails->name == NULL ){
+               LOG_ERROR("SAM3 ChipID 0x%08x not found in table (perhaps you can this chip?)", 
+                                 (unsigned int)(pPrivate->pChip->cfg.CHIPID_CIDR) );
+               // Help the victim, print details about the chip
+               membuf_reset( pPrivate->pChip->mbuf );
+               membuf_sprintf( pPrivate->pChip->mbuf, 
+                                               "SAM3 CHIPID_CIDR: 0x%08x decodes as follows\n",
+                                               pPrivate->pChip->cfg.CHIPID_CIDR );
+               sam3_explain_chipid_cidr( pPrivate->pChip );
+               cp = membuf_strtok( pPrivate->pChip->mbuf, "\n", &vp );
+               while(cp){
+                       LOG_INFO("%s", cp );
+                       cp = membuf_strtok( NULL, "\n", &vp );
+               }
+               return ERROR_FAIL;
+       }
+
+       // DANGER: THERE ARE DRAGONS HERE
+
+       // get our pChip - it is going
+       // to be over-written shortly
+       pChip = pPrivate->pChip;
+
+       // Note that, in reality:
+       //
+       //     pPrivate = &(pChip->details.bank[0])
+       // or  pPrivate = &(pChip->details.bank[1])
+       //
+
+       // save the "bank" pointers
+       for( x = 0 ; x < SAM3_MAX_FLASH_BANKS ; x++ ){
+               saved_banks[ x ] = pChip->details.bank[x].pBank;
+       }
+
+       // Overwrite the "details" structure.
+       memcpy( &(pPrivate->pChip->details), 
+                       pDetails, 
+                       sizeof(pPrivate->pChip->details));
+
+       // now fix the ghosted pointers
+       for( x = 0 ; x < SAM3_MAX_FLASH_BANKS ; x++ ){
+               pChip->details.bank[x].pChip = pChip;
+               pChip->details.bank[x].pBank = saved_banks[x];
+       }
+
+       // update the *BANK*SIZE* 
+
+       LOG_DEBUG("End");
+       return ERROR_OK;
+}              
+                                 
+
+
+static int 
+_sam3_probe(struct flash_bank_s *bank, int noise)
+{
+       unsigned x;
+       int r;
+       struct sam3_bank_private *pPrivate;
+
+
+       LOG_DEBUG("Begin: Bank: %d, Noise: %d", bank->bank_number, noise );
+       if (bank->target->state != TARGET_HALTED)
+       {
+               LOG_ERROR("Target not halted");
+               return ERROR_TARGET_NOT_HALTED;
+       }
+
+       pPrivate = get_sam3_bank_private( bank );
+       if( !pPrivate ){
+               LOG_ERROR("Invalid/unknown bank number\n");
+               return ERROR_FAIL;
+       }
+
+       r = sam3_ReadAllRegs(pPrivate->pChip);
+       if( r != ERROR_OK ){
+               return r;
+       }
+
+       
+       LOG_DEBUG("Here");
+       r = sam3_GetInfo( pPrivate->pChip );
+       if( r != ERROR_OK ){
+               return r;
+       }
+       if( !(pPrivate->pChip->probed) ){
+               pPrivate->pChip->probed = 1;
+               LOG_DEBUG("Here");
+               r = sam3_GetDetails( pPrivate );
+               if( r != ERROR_OK ){
+                       return r;
+               }               
+       }
+
+       // update the flash bank size
+       for( x = 0 ; x < SAM3_MAX_FLASH_BANKS ; x++ ){
+               if( bank->base == pPrivate->pChip->details.bank[0].base_address ){
+                       bank->size =  pPrivate->pChip->details.bank[0].size_bytes;
+                       break;
+               }
+       }
+
+       if( bank->sectors == NULL ){
+               bank->sectors     = calloc(pPrivate->nsectors, (sizeof( (bank->sectors)[0] )));
+               if( bank->sectors == NULL ){
+                       LOG_ERROR("No memory!");
+                       return ERROR_FAIL;
+               }
+               bank->num_sectors = pPrivate->nsectors;
+                       
+               for( x = 0 ; ((int)(x)) < bank->num_sectors ; x++ ){
+                       bank->sectors[x].size         = pPrivate->sector_size;
+                       bank->sectors[x].offset       = x * (pPrivate->sector_size);
+                       // mark as unknown
+                       bank->sectors[x].is_erased    = -1;
+                       bank->sectors[x].is_protected = -1;
+               }
+       }
+
+       pPrivate->probed = 1;
+
+       r = sam3_protect_check( bank );
+       if( r != ERROR_OK ){
+               return r;
+       }
+
+       LOG_DEBUG("Bank = %d, nbanks = %d",
+                         pPrivate->bank_number , pPrivate->pChip->details.n_banks);
+       if( (pPrivate->bank_number+1) == pPrivate->pChip->details.n_banks ){
+               // read unique id, 
+               // it appears to be associated with the *last* flash bank.
+               FLASHD_ReadUniqueID(pPrivate);
+       }
+
+       return r;
+}
+
+static int 
+sam3_probe(struct flash_bank_s *bank)
+{
+       return _sam3_probe( bank, 1 );
+}
+
+static int 
+sam3_auto_probe(struct flash_bank_s *bank)
+{
+       return _sam3_probe( bank, 0 );
+}
+
+
+
+static int 
+sam3_erase(struct flash_bank_s *bank, int first, int last)
+{
+       struct sam3_bank_private *pPrivate;
+       int r;
+
+       LOG_DEBUG("Here");
+       if (bank->target->state != TARGET_HALTED) {
+               LOG_ERROR("Target not halted");
+               return ERROR_TARGET_NOT_HALTED;
+       }
+
+       r = sam3_auto_probe( bank );
+       if( r != ERROR_OK ){
+               LOG_DEBUG("Here,r=%d",r);
+               return r;
+       }
+
+       pPrivate = get_sam3_bank_private( bank );
+       if( !(pPrivate->probed) ){
+               return ERROR_FLASH_BANK_NOT_PROBED;
+       }
+
+       if( (first == 0) && ((last+1)== ((int)(pPrivate->nsectors))) ){
+               // whole chip
+               LOG_DEBUG("Here");
+               return FLASHD_EraseEntireBank( pPrivate );
+       }
+       LOG_INFO("sam3 auto-erases while programing (request ignored)");
+       return ERROR_OK;
+}
+
+static int 
+sam3_protect(struct flash_bank_s *bank, int set, int first, int last)
+{
+       struct sam3_bank_private *pPrivate;
+       int r;
+
+       LOG_DEBUG("Here");
+       if (bank->target->state != TARGET_HALTED) {
+               LOG_ERROR("Target not halted");
+               return ERROR_TARGET_NOT_HALTED;
+       }
+
+       pPrivate = get_sam3_bank_private( bank );
+       if( !(pPrivate->probed) ){
+               return ERROR_FLASH_BANK_NOT_PROBED;
+       }
+
+       if( set ){
+               r = FLASHD_Lock( pPrivate, (unsigned)(first), (unsigned)(last));
+       } else {
+               r = FLASHD_Unlock( pPrivate, (unsigned)(first), (unsigned)(last));
+       }
+       LOG_DEBUG("End: r=%d",r);
+
+       return r;
+               
+}
+
+
+static int
+sam3_info( flash_bank_t *bank, char *buf, int buf_size )
+{
+       if (bank->target->state != TARGET_HALTED) {
+               LOG_ERROR("Target not halted");
+               return ERROR_TARGET_NOT_HALTED;
+       }
+       buf[ 0 ] = 0;
+       return ERROR_OK;
+}
+
+static int
+sam3_page_read( struct sam3_bank_private *pPrivate, unsigned pagenum, uint8_t *buf )
+{
+       uint32_t adr;
+       int r;
+
+       adr = pagenum * pPrivate->page_size;
+       adr += adr + pPrivate->base_address;
+
+       r = target_read_memory( pPrivate->pChip->target, 
+                                                       adr,
+                                                       4, /* THIS*MUST*BE* in 32bit values */
+                                                       pPrivate->page_size / 4,
+                                                       buf );
+       if( r != ERROR_OK ){
+               LOG_ERROR("SAM3: Flash program failed to read page phys address: 0x%08x", (unsigned int)(adr) );
+       }
+       return r;
+}
+
+// The code below is basically this:
+// compiled with
+// arm-none-eabi-gcc -mthumb -mcpu=cortex-m3 -O9 -S ./foobar.c -o foobar.s
+//
+// Only the *CPU* can write to the flash buffer.
+// the DAP cannot... so - we download this 28byte thing
+// Run the algorithm - (below)
+// to program the device
+// 
+// ========================================
+// #include <stdint.h>
+// 
+// struct foo { 
+//   uint32_t *dst;
+//   const uint32_t *src;
+//   int   n;
+//   volatile uint32_t *base;
+//   uint32_t   cmd;
+// };
+//
+// 
+// uint32_t sam3_function( struct foo *p )
+// {
+//   volatile uint32_t *v;
+//   uint32_t *d;
+//   const uint32_t *s;
+//   int   n;
+//   uint32_t r;
+// 
+//   d = p->dst;
+//   s = p->src;
+//   n = p->n;
+// 
+//   do {
+//     *d++ = *s++;
+//   } while( --n )
+//     ;
+// 
+//   v = p->base;
+//   
+//   v[ 1 ] = p->cmd;
+//   do {
+//     r = v[8/4];
+//   } while( !(r&1) )
+//     ;
+//   return r;
+// }
+// ========================================
+
+
+
+static const uint8_t 
+sam3_page_write_opcodes[] = {
+       //  24 0000 0446                mov     r4, r0
+       0x04,0x46,
+       //  25 0002 6168                ldr     r1, [r4, #4]
+       0x61,0x68,
+       //  26 0004 0068                ldr     r0, [r0, #0]
+       0x00,0x68,
+       //  27 0006 A268                ldr     r2, [r4, #8]
+       0xa2,0x68,
+       //  28                          @ lr needed for prologue
+       //  29                  .L2:
+       //  30 0008 51F8043B            ldr     r3, [r1], #4
+       0x51,0xf8,0x04,0x3b,
+       //  31 000c 12F1FF32            adds    r2, r2, #-1
+       0x12,0xf1,0xff,0x32,
+       //  32 0010 40F8043B            str     r3, [r0], #4
+       0x40,0xf8,0x04,0x3b,
+       //  33 0014 F8D1                bne     .L2
+       0xf8,0xd1,
+       //  34 0016 E268                ldr     r2, [r4, #12]
+       0xe2,0x68,
+       //  35 0018 2369                ldr     r3, [r4, #16]
+       0x23,0x69,
+       //  36 001a 5360                str     r3, [r2, #4]
+       0x53,0x60,
+       //  37 001c 0832                adds    r2, r2, #8
+       0x08,0x32,
+       //  38                  .L4:
+       //  39 001e 1068                ldr     r0, [r2, #0]
+       0x10,0x68,
+       //  40 0020 10F0010F            tst     r0, #1
+       0x10,0xf0,0x01,0x0f,
+       //  41 0024 FBD0                beq     .L4
+       0xfb,0xd0,
+       //  42                  .done:
+       //  43 0026 FEE7                b       .done
+       0xfe,0xe7
+};
+
+
+static int
+sam3_page_write( struct sam3_bank_private *pPrivate, unsigned pagenum, uint8_t *buf )
+{
+       uint32_t adr;
+       uint32_t status;
+       int r;
+
+       adr = pagenum * pPrivate->page_size;
+       adr += (adr + pPrivate->base_address);
+
+       LOG_DEBUG("Wr Page %u @ phys address: 0x%08x", pagenum, (unsigned int)(adr) );
+       r = target_write_memory( pPrivate->pChip->target, 
+                                                        adr,
+                                                        4, /* THIS*MUST*BE* in 32bit values */
+                                                        pPrivate->page_size / 4,
+                                                        buf );
+       if( r != ERROR_OK ){
+               LOG_ERROR("SAM3: Failed to write (buffer) page at phys address 0x%08x", (unsigned int)(adr) );
+               return r;
+       }
+
+       r = EFC_PerformCommand( pPrivate,
+                                                       // send Erase & Write Page
+                                                       AT91C_EFC_FCMD_EWP,
+                                                       pagenum,
+                                                       &status );
+
+       if( r != ERROR_OK ){
+               LOG_ERROR("SAM3: Error performing Erase & Write page @ phys address 0x%08x", (unsigned int)(adr) );
+       }
+       if( status & (1 << 2) ){
+               LOG_ERROR("SAM3: Page @ Phys address 0x%08x is locked", (unsigned int)(adr) );
+               return ERROR_FAIL;
+       }
+       if( status & (1 << 1) ){
+               LOG_ERROR("SAM3: Flash Command error @phys address 0x%08x", (unsigned int)(adr) );
+               return ERROR_FAIL;
+       }
+       return ERROR_OK;
+}
+                                               
+                                               
+                                               
+                                 
+
+static int 
+sam3_write(struct flash_bank_s *bank, 
+                  uint8_t *buffer, 
+                  uint32_t offset, 
+                  uint32_t count)
+{
+       int n;
+       unsigned page_cur;
+       unsigned page_end;
+       int r;
+       unsigned page_offset;
+       struct sam3_bank_private *pPrivate;
+       uint8_t *pagebuffer;
+
+       // ignore dumb requests
+       if( count == 0 ){
+               return ERROR_OK;
+       }
+
+       if (bank->target->state != TARGET_HALTED) {
+               LOG_ERROR("Target not halted");
+               return ERROR_TARGET_NOT_HALTED;
+       }
+
+       pPrivate = get_sam3_bank_private(bank);
+       if( !(pPrivate->probed) ){
+               return ERROR_FLASH_BANK_NOT_PROBED;
+       }
+
+
+       if( (offset + count) > pPrivate->size_bytes ){
+               LOG_ERROR("Flash write error - past end of bank");
+               LOG_ERROR(" offset: 0x%08x, count 0x%08x, BankEnd: 0x%08x",
+                                 (unsigned int)(offset), 
+                                 (unsigned int)(count),
+                                 (unsigned int)(pPrivate->size_bytes) );
+               return ERROR_FAIL;
+       }
+
+       pagebuffer = alloca( pPrivate->page_size );
+               
+       // what page do we start & end in?
+       page_cur = offset / pPrivate->page_size;
+       page_end = (offset + count - 1) / pPrivate->page_size;
+       
+       LOG_DEBUG("Offset: 0x%08x, Count: 0x%08x", (unsigned int)(offset), (unsigned int)(count));
+       LOG_DEBUG("Page start: %d, Page End: %d", (int)(page_cur), (int)(page_end) );
+                         
+       // Special case: all one page
+       //
+       // Otherwise:
+       //    (1) non-aligned start
+       //    (2) body pages
+       //    (3) non-aligned end.
+       
+       // Handle special case - all one page.
+       if( page_cur == page_end ){
+               LOG_DEBUG("Special case, all in one page");
+               r = sam3_page_read( pPrivate, page_cur, pagebuffer );
+               if( r != ERROR_OK ){
+                       return r;
+               }
+               
+               page_offset = (offset & (pPrivate->page_size-1));
+               memcpy( pagebuffer + page_offset,
+                               buffer,
+                               count );
+               
+               r = sam3_page_write( pPrivate, page_cur, pagebuffer );
+               if( r != ERROR_OK ){
+                       return r;
+               }
+               return ERROR_OK;
+       }
+
+       // non-aligned start
+       page_offset = offset & (pPrivate->page_size - 1);
+       if( page_offset ){
+               LOG_DEBUG("Not-Aligned start");
+               // read the partial
+               r = sam3_page_read( pPrivate, page_cur, pagebuffer );
+               if( r != ERROR_OK ){
+                       return r;
+               }
+
+               // over-write with new data
+               n = (pPrivate->page_size - page_offset );
+               memcpy( pagebuffer + page_offset,
+                               buffer,
+                               n );
+       
+               r = sam3_page_write( pPrivate, page_cur, pagebuffer );
+               if( r != ERROR_OK ){
+                       return r;
+               }
+
+               count  -= n;
+               offset += n;
+               buffer += n;
+               page_cur++;
+       }
+
+       // intermediate large pages
+       // also - the final *terminal* 
+       // if that terminal page is a full page
+       LOG_DEBUG("Full Page Loop: cur=%d, end=%d, count=0x%08x", 
+                         (int)page_cur, (int)page_end, (unsigned int)(count) );
+
+       while( (page_cur < page_end) && 
+                  (count >= pPrivate->page_size) ){
+               r = sam3_page_write( pPrivate, page_cur, buffer );
+               if( r != ERROR_OK ){
+                       return r;
+               }
+               count    -= pPrivate->page_size;
+               buffer   += pPrivate->page_size;
+               page_cur += 1;
+       }
+
+       // terminal partial page?
+       if( count ){
+               LOG_DEBUG("Terminal partial page, count=0x%08x", (unsigned int)(count));
+               // we have a partial page
+               r = sam3_page_read( pPrivate, page_cur, pagebuffer );
+               if( r != ERROR_OK ){
+                       return r;
+               }
+               // data goes at start
+               memcpy( pagebuffer, buffer, count );
+               r = sam3_page_write( pPrivate, page_cur, pagebuffer );
+               if( r != ERROR_OK ){
+                       return r;
+               }
+               buffer += count;
+               count  -= count;
+       }
+       LOG_DEBUG("Done!");
+       return ERROR_OK;
+}
+
+static int
+sam3_handle_info_command(  struct command_context_s *cmd_ctx, char *cmd, char **argv, int argc )
+{
+       struct sam3_chip *pChip;
+       void *vp;
+       const char *cp;
+       unsigned x;
+       int r;
+
+       pChip = get_current_sam3(cmd_ctx);
+       if( !pChip ){
+               return ERROR_OK;
+       }
+
+       r = 0;
+       
+       // bank0 must exist before we can do anything
+       if( pChip->details.bank[0].pBank == NULL ){
+               x = 0;
+       need_define:
+               command_print( cmd_ctx, 
+                                          "Please define bank %d via command: flash bank %s ... ", 
+                                          x,
+                                          at91sam3_flash.name );
+               return ERROR_FAIL;
+       }
+
+       // if bank 0 is not probed, then probe it
+       if( !(pChip->details.bank[0].probed) ){
+               r = sam3_auto_probe( pChip->details.bank[0].pBank );
+               if( r != ERROR_OK ){
+                       return ERROR_FAIL;
+               }
+       }
+       // above garentees the "chip details" structure is valid
+       // and thus, bank private areas are valid
+       // and we have a SAM3 chip, what a concept! 
+               
+
+       // auto-probe other banks, 0 done above
+    for( x = 1 ; x < SAM3_MAX_FLASH_BANKS ; x++ ){
+               // skip banks not present
+               if( !(pChip->details.bank[x].present) ){
+                       continue;
+               }
+               
+               if( pChip->details.bank[x].pBank == NULL ){
+                       goto need_define;
+               }
+
+               if( pChip->details.bank[x].probed ){
+                       continue;
+               }
+               
+               r = sam3_auto_probe( pChip->details.bank[x].pBank );
+               if( r != ERROR_OK ){
+                       return r;
+               }
+       }
+                       
+
+       r = sam3_GetInfo( pChip );
+       if( r != ERROR_OK ){
+               LOG_DEBUG("Sam3Info, Failed %d\n",r);
+               return r;
+       }
+       
+
+       // print results
+       cp = membuf_strtok( pChip->mbuf, "\n", &vp );
+       while(cp){
+               command_print(cmd_ctx,"%s", cp );
+               cp = membuf_strtok( NULL, "\n", &vp );
+       }
+       return ERROR_OK;
+}
+
+static int
+sam3_handle_gpnvm_command( struct command_context_s *cmd_ctx, char *cmd, char **argv, int argc)
+{
+       unsigned x,v;
+       uint32_t v32;
+       int r,who;
+       struct sam3_chip *pChip;
+
+       pChip = get_current_sam3(cmd_ctx);
+       if( !pChip ){
+               return ERROR_OK;
+       }
+
+       if ( pChip->target->state != TARGET_HALTED ){
+               LOG_ERROR("sam3 - target not halted");
+               return ERROR_TARGET_NOT_HALTED;
+       }
+
+
+       if( pChip->details.bank[0].pBank == NULL ){
+               command_print( cmd_ctx, "Bank0 must be defined first via: flash bank %s ...",
+                                          at91sam3_flash.name );
+               return ERROR_FAIL;
+       }
+       if( !pChip->details.bank[0].probed ){
+               r = sam3_auto_probe( pChip->details.bank[0].pBank );
+               if( r != ERROR_OK ){
+                       return r;
+               }
+       }
+
+
+       switch( argc ){
+       default:
+               command_print(cmd_ctx,"Too many parameters\n");
+               return ERROR_COMMAND_SYNTAX_ERROR;
+               break;
+       case 0:
+               who = -1;
+               goto showall;
+               break;
+       case 1:
+               who = -1;
+               break;
+       case 2:
+               if( (0 == strcmp( argv[0], "show" )) && (0 == strcmp( argv[1], "all" )) ){
+                       who = -1;
+               } else {
+                       r = parse_u32( argv[1], &v32 );
+                       if( r != ERROR_OK ){
+                               command_print( cmd_ctx, "Not a number: %s", argv[1] );
+                               return r;
+                       }
+                       who = v32;
+               }
+               break;
+       }
+
+       if( 0 == strcmp( "show", argv[0] ) ){
+               if( who == -1 ){
+               showall:
+                       for( x = 0 ; x < pChip->details.n_gpnvms ; x++ ){
+                               r = FLASHD_GetGPNVM( &(pChip->details.bank[0]), x, &v );
+                               if( r != ERROR_OK ){
+                                       break;
+                               }
+                               command_print(cmd_ctx, "sam3-gpnvm%u: %u", x, v );
+                       }
+                       return r;
+               }
+               if( (who >= 0) && (((unsigned)(who)) < pChip->details.n_gpnvms) ){
+                       r = FLASHD_GetGPNVM( &(pChip->details.bank[0]), who, &v );
+                       command_print(cmd_ctx, "sam3-gpnvm%u: %u", who, v );
+                       return r;
+               } else {
+                       command_print(cmd_ctx, "sam3-gpnvm invalid GPNVM: %u", who );
+                       return ERROR_COMMAND_SYNTAX_ERROR;
+               }
+       }
+
+       if( who == -1 ){
+               command_print( cmd_ctx, "Missing GPNVM number");
+               return ERROR_COMMAND_SYNTAX_ERROR;
+       }
+       
+       if( 0 == strcmp( "set", argv[0] ) ){
+               r = FLASHD_SetGPNVM( &(pChip->details.bank[0]), who );
+       } else if( (0 == strcmp( "clr", argv[0] )) ||
+                          (0 == strcmp( "clear", argv[0])) ){ // quietly accept both
+               r = FLASHD_ClrGPNVM( &(pChip->details.bank[0]), who );
+       } else {
+               command_print( cmd_ctx, "Unkown command: %s", argv[0] );
+               r = ERROR_COMMAND_SYNTAX_ERROR;
+       }
+       return r;
+}
+
+static int 
+sam3_handle_slowclk_command( struct command_context_s *cmd_ctx, char *cmd, char **argv, int argc)
+{
+       uint32_t v;
+       int r;
+
+       struct sam3_chip *pChip;
+
+       pChip = get_current_sam3(cmd_ctx);
+       if( !pChip ){
+               return ERROR_OK;
+       }
+
+
+       switch( argc ){
+       case 0:
+               // show
+               break;
+       case 1:
+               // set
+               r = parse_u32( argv[0], &v );
+               if( v > 200000 ){
+                       // absurd slow clock of 200Khz?
+                       command_print(cmd_ctx,"Absurd/illegal slow clock freq: %d\n", (int)(v));
+                       return ERROR_COMMAND_SYNTAX_ERROR;
+               }
+               pChip->cfg.slow_freq = v;
+               break;
+               
+       default:
+               // error
+               command_print( cmd_ctx,"Too many parameters");
+               return ERROR_COMMAND_SYNTAX_ERROR;
+               break;
+       }
+       command_print( cmd_ctx, "Slowclk freq: %d.%03dkhz", 
+                                  (int)(pChip->cfg.slow_freq/ 1000),
+                                  (int)(pChip->cfg.slow_freq% 1000));
+       return ERROR_OK;
+}
+
+
+static int sam3_registered;
+static int
+sam3_register_commands( struct command_context_s *cmd_ctx)
+{
+       command_t *pCmd;
+
+       // only register once
+       if( !sam3_registered ){
+               sam3_registered++;
+
+               pCmd = register_command( cmd_ctx, NULL, "at91sam3", NULL, COMMAND_ANY, NULL );
+               register_command( cmd_ctx, pCmd,
+                                                 "gpnvm", 
+                                                 sam3_handle_gpnvm_command, 
+                                                 COMMAND_EXEC, 
+                                                 "at91sam3 gpnvm [action [<BIT>], by default 'show', otherwise set|clear BIT");
+               register_command( cmd_ctx, pCmd,
+                                                 "info",
+                                                 sam3_handle_info_command,
+                                                 COMMAND_EXEC,
+                                                 "at91sam3 info - print information about the current sam3 chip");
+               register_command( cmd_ctx, pCmd,
+                                                 "slowclk",
+                                                 sam3_handle_slowclk_command,
+                                                 COMMAND_EXEC,
+                                                 "at91sam3 slowclk [VALUE] set the slowclock frequency (default 32768hz)");
+       }
+       return ERROR_OK;
+}
+
+
+flash_driver_t at91sam3_flash =
+{
+       .name                                           = "at91sam3",
+       .register_commands                      = sam3_register_commands,
+       
+       .flash_bank_command                     = sam3_flash_bank_command,
+       .erase                                          = sam3_erase,
+       .protect                                        = sam3_protect,
+       .write                                          = sam3_write,
+       .probe                                          = sam3_probe,
+       .auto_probe                                     = sam3_auto_probe,
+       .erase_check                            = sam3_erase_check,
+       .protect_check                          = sam3_protect_check,
+       .info                                           = sam3_info
+};
+
+
+
+/**
+ * Local Variables: **
+ * mode: c **
+ * c-basic-offset: 4 **
+ * tab-width: 4 **
+ * End: **
+ */
diff --git a/src/flash/at91sam3.h b/src/flash/at91sam3.h
new file mode 100755 (executable)
index 0000000..b137737
--- /dev/null
@@ -0,0 +1,23 @@
+/***************************************************************************\r
+ *   Copyright (C) 2009 by Duane Ellis                                     *\r
+ *   openocd@duaneellis.com                                                *\r
+ *                                                                         *\r
+ *   This program is free software; you can redistribute it and/or modify  *\r
+ *   it under the terms of the GNU General Public License as published by  *\r
+ *   the Free Software Foundation; either version 2 of the License, or     *\r
+ *   (at your option) any later version.                                   *\r
+ *                                                                         *\r
+ *   This program is distributed in the hope that it will be useful,       *\r
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *\r
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *\r
+ *   GNU General Public License for more details.                          *\r
+ *                                                                         *\r
+ *   You should have received a copy of the GNU General Public License     *\r
+ *   along with this program; if not, write to the                         *\r
+ *   Free Software Foundation, Inc.,                                       *\r
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *\r
+ ***************************************************************************/\r
+\r
+\r
+// nothing to do here other then export this.\r
+extern flash_driver_t at91sam3_flash;\r
index 20d213c..403aabf 100644 (file)
@@ -30,6 +30,7 @@
 #include "flash.h"
 #include "image.h"
 #include "time_support.h"
+#include "at91sam3.h"
 
 /* command handlers */
 static int handle_flash_bank_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
@@ -66,6 +67,7 @@ flash_driver_t *flash_drivers[] = {
        &lpc2000_flash,
        &cfi_flash,
        &at91sam7_flash,
+       &at91sam3_flash,
        &str7x_flash,
        &str9x_flash,
        &aduc702x_flash,
diff --git a/tcl/board/atmel_sam3u_ek.cfg b/tcl/board/atmel_sam3u_ek.cfg
new file mode 100755 (executable)
index 0000000..53c8d34
--- /dev/null
@@ -0,0 +1 @@
+source [find target/at91sam3u4e.cfg]\r
diff --git a/tcl/target/at91sam3u1c.cfg b/tcl/target/at91sam3u1c.cfg
new file mode 100755 (executable)
index 0000000..d338f30
--- /dev/null
@@ -0,0 +1,7 @@
+# common stuff
+source [find target/at91sam3uxx.cfg]
+
+# size is automatically "calculated" by probing
+flash bank at91sam3 0x000080000 0 1 1 $_TARGETNAME
+
+
diff --git a/tcl/target/at91sam3u1e.cfg b/tcl/target/at91sam3u1e.cfg
new file mode 100755 (executable)
index 0000000..d338f30
--- /dev/null
@@ -0,0 +1,7 @@
+# common stuff
+source [find target/at91sam3uxx.cfg]
+
+# size is automatically "calculated" by probing
+flash bank at91sam3 0x000080000 0 1 1 $_TARGETNAME
+
+
diff --git a/tcl/target/at91sam3u2c.cfg b/tcl/target/at91sam3u2c.cfg
new file mode 100755 (executable)
index 0000000..d338f30
--- /dev/null
@@ -0,0 +1,7 @@
+# common stuff
+source [find target/at91sam3uxx.cfg]
+
+# size is automatically "calculated" by probing
+flash bank at91sam3 0x000080000 0 1 1 $_TARGETNAME
+
+
diff --git a/tcl/target/at91sam3u2e.cfg b/tcl/target/at91sam3u2e.cfg
new file mode 100755 (executable)
index 0000000..d338f30
--- /dev/null
@@ -0,0 +1,7 @@
+# common stuff
+source [find target/at91sam3uxx.cfg]
+
+# size is automatically "calculated" by probing
+flash bank at91sam3 0x000080000 0 1 1 $_TARGETNAME
+
+
diff --git a/tcl/target/at91sam3u4c.cfg b/tcl/target/at91sam3u4c.cfg
new file mode 100755 (executable)
index 0000000..e8fdaba
--- /dev/null
@@ -0,0 +1,9 @@
+# common stuff
+source [find target/at91sam3uxx.cfg]
+
+# size is automatically "calculated" by probing
+flash bank at91sam3 0x000080000 0 1 1 $_TARGETNAME
+# This is a 256K chip, it has the 2nd bank
+flash bank at91sam3 0x000100000 0 1 1 $_TARGETNAME
+
+
diff --git a/tcl/target/at91sam3u4e.cfg b/tcl/target/at91sam3u4e.cfg
new file mode 100755 (executable)
index 0000000..9477ad0
--- /dev/null
@@ -0,0 +1,9 @@
+# common stuff
+source [find target/at91sam3uxx.cfg]
+
+# size is automatically "calculated" by probing
+flash bank at91sam3 0x000080000 0 1 1 $_TARGETNAME
+# This is a 256K chip - it has the 2nd bank
+flash bank at91sam3 0x000100000 0 1 1 $_TARGETNAME
+
+
diff --git a/tcl/target/at91sam3uXX.cfg b/tcl/target/at91sam3uXX.cfg
new file mode 100755 (executable)
index 0000000..37f6b8e
--- /dev/null
@@ -0,0 +1,47 @@
+# script for ATMEL sam3, a CORTEX-M3 chip
+#
+#  at91sam3u4e
+#  at91sam3u2e
+#  at91sam3u1e
+#  at91sam3u4c
+#  at91sam3u2c
+#  at91sam3u1c
+
+if { [info exists CHIPNAME] } {        
+   set  _CHIPNAME $CHIPNAME    
+} else {        
+   set  _CHIPNAME sam3
+}
+
+if { [info exists ENDIAN] } {  
+   set  _ENDIAN $ENDIAN    
+} else {        
+   set  _ENDIAN little
+}
+
+
+#jtag scan chain
+if { [info exists CPUTAPID ] } {
+   set _CPUTAPID $CPUTAPID
+} else {
+   set _CPUTAPID 0x4ba00477
+}
+
+jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
+
+set _TARGETNAME [format "%s.cpu" $_CHIPNAME]
+target create $_TARGETNAME cortex_m3 -endian $_ENDIAN -chain-position $_TARGETNAME
+
+# 16K is plenty, the smallest chip has this much
+$_TARGETNAME configure -work-area-virt 0 -work-area-phys 0x20000000 -work-area-size 16384 -work-area-backup 0
+
+reset_config srst_only
+
+# GDB can use this
+gdb_memory_map enable
+# And GDB can flash the chip
+gdb_flash_program enable
+
+$_TARGETNAME configure -event gdb-flash-erase-start {
+    halt
+}