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fix memory corruption introduce in 1730
[openocd.git] / src / target / arm7tdmi.c
diff --git a/src/target/arm7tdmi.c b/src/target/arm7tdmi.c
index 0c408a7a05184813c1605e79f140f6dde22eb6ea..93281ce58c12e9cdad3828ab81bb44552dfd54d2 100644 (file)
--- a/src/target/arm7tdmi.c
+++ b/src/target/arm7tdmi.c
@@ -5,6 +5,9 @@
  *   Copyright (C) 2008 by Spencer Oliver                                  *
  *   spen@spen-soft.co.uk                                                  *
  *                                                                         *
+ *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
+ *   oyvind.harboe@zylin.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     *
@@ -26,30 +29,14 @@
 
 #include "arm7tdmi.h"
 
-#include "arm7_9_common.h"
-#include "register.h"
-#include "target.h"
-#include "armv4_5.h"
-#include "embeddedice.h"
-#include "etm.h"
-#include "log.h"
-#include "jtag.h"
-#include "arm_jtag.h"
-
-#include <stdlib.h>
-#include <string.h>
 
 #if 0
 #define _DEBUG_INSTRUCTION_EXECUTION_
 #endif
 
-/* cli handling */
-int arm7tdmi_register_commands(struct command_context_s *cmd_ctx);
-
 /* forward declarations */
 
 int arm7tdmi_target_create(struct target_s *target,Jim_Interp *interp);
-int arm7tdmi_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
 int arm7tdmi_quit(void);
 
 /* target function declarations */
@@ -115,22 +102,12 @@ int arm7tdmi_examine_debug_reason(target_t *target)
                fields[0].tap = arm7_9->jtag_info.tap;
                fields[0].num_bits = 1;
                fields[0].out_value = NULL;
-               fields[0].out_mask = NULL;
                fields[0].in_value = &breakpoint;
-               fields[0].in_check_value = NULL;
-               fields[0].in_check_mask = NULL;
-               fields[0].in_handler = NULL;
-               fields[0].in_handler_priv = NULL;
 
                fields[1].tap = arm7_9->jtag_info.tap;
                fields[1].num_bits = 32;
                fields[1].out_value = NULL;
-               fields[1].out_mask = NULL;
                fields[1].in_value = databus;
-               fields[1].in_check_value = NULL;
-               fields[1].in_check_mask = NULL;
-               fields[1].in_handler = NULL;
-               fields[1].in_handler_priv = NULL;
 
                if((retval = arm_jtag_scann(&arm7_9->jtag_info, 0x1)) != ERROR_OK)
                {
@@ -202,25 +179,17 @@ int arm7tdmi_clock_data_in(arm_jtag_t *jtag_info, u32 *in)
        fields[0].tap = jtag_info->tap;
        fields[0].num_bits = 1;
        fields[0].out_value = NULL;
-       fields[0].out_mask = NULL;
        fields[0].in_value = NULL;
-       fields[0].in_check_value = NULL;
-       fields[0].in_check_mask = NULL;
-       fields[0].in_handler = NULL;
-       fields[0].in_handler_priv = NULL;
 
        fields[1].tap = jtag_info->tap;
        fields[1].num_bits = 32;
        fields[1].out_value = NULL;
-       fields[1].out_mask = NULL;
-       fields[1].in_value = NULL;
-       fields[1].in_handler = arm_jtag_buf_to_u32_flip;
-       fields[1].in_handler_priv = in;
-       fields[1].in_check_value = NULL;
-       fields[1].in_check_mask = NULL;
+       fields[1].in_value = (u8 *)in;
 
        jtag_add_dr_scan(2, fields, TAP_INVALID);
 
+       jtag_add_callback(arm7flip32, (u8 *)in);
+
        jtag_add_runtest(0, TAP_INVALID);
 
 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
@@ -244,6 +213,43 @@ int arm7tdmi_clock_data_in(arm_jtag_t *jtag_info, u32 *in)
        return ERROR_OK;
 }
 
+void arm_endianness(u8 *tmp, void *in, int size, int be, int flip)
+{
+       u32 readback=le_to_h_u32(tmp);
+       if (flip)
+               readback=flip_u32(readback, 32);
+       switch (size)
+       {
+               case 4:
+                       if (be)
+                       {
+                               h_u32_to_be(((u8*)in), readback);
+                       } else
+                       {
+                                h_u32_to_le(((u8*)in), readback);
+                       }
+                       break;
+               case 2:
+                       if (be)
+                       {
+                               h_u16_to_be(((u8*)in), readback & 0xffff);
+                       } else
+                       {
+                               h_u16_to_le(((u8*)in), readback & 0xffff);
+                       }
+                       break;
+               case 1:
+                       *((u8 *)in)= readback & 0xff;
+                       break;
+       }
+}
+
+static int arm7endianness(u8 *in, jtag_callback_data_t size, jtag_callback_data_t be, jtag_callback_data_t captured)
+{
+       arm_endianness((u8 *)captured, in, (int)size, (int)be, 1);
+       return ERROR_OK;
+}
+
 /* clock the target, and read the databus
  * the *in pointer points to a buffer where elements of 'size' bytes
  * are stored in big (be==1) or little (be==0) endianness
@@ -263,36 +269,17 @@ int arm7tdmi_clock_data_in_endianness(arm_jtag_t *jtag_info, void *in, int size,
        fields[0].tap = jtag_info->tap;
        fields[0].num_bits = 1;
        fields[0].out_value = NULL;
-       fields[0].out_mask = NULL;
        fields[0].in_value = NULL;
-       fields[0].in_check_value = NULL;
-       fields[0].in_check_mask = NULL;
-       fields[0].in_handler = NULL;
-       fields[0].in_handler_priv = NULL;
 
        fields[1].tap = jtag_info->tap;
        fields[1].num_bits = 32;
        fields[1].out_value = NULL;
-       fields[1].out_mask = NULL;
-       fields[1].in_value = NULL;
-       switch (size)
-       {
-               case 4:
-                       fields[1].in_handler = (be) ? arm_jtag_buf_to_be32_flip : arm_jtag_buf_to_le32_flip;
-                       break;
-               case 2:
-                       fields[1].in_handler = (be) ? arm_jtag_buf_to_be16_flip : arm_jtag_buf_to_le16_flip;
-                       break;
-               case 1:
-                       fields[1].in_handler = arm_jtag_buf_to_8_flip;
-                       break;
-       }
-       fields[1].in_handler_priv = in;
-       fields[1].in_check_value = NULL;
-       fields[1].in_check_mask = NULL;
+       jtag_alloc_in_value32(&fields[1]);
 
        jtag_add_dr_scan(2, fields, TAP_INVALID);
 
+       jtag_add_callback4(arm7endianness, in, (jtag_callback_data_t)size, (jtag_callback_data_t)be, (jtag_callback_data_t)fields[1].in_value);
+
        jtag_add_runtest(0, TAP_INVALID);
 
 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
@@ -366,6 +353,13 @@ void arm7tdmi_change_to_arm(target_t *target, u32 *r0, u32 *pc)
        *pc -= 0xa;
 }
 
+
+/* FIX!!! is this a potential performance bottleneck w.r.t. requiring too many
+ * roundtrips when jtag_execute_queue() has a large overhead(e.g. for USB)s?
+ *
+ * The solution is to arrange for a large out/in scan in this loop and
+ * and convert data afterwards.
+ */
 void arm7tdmi_read_core_regs(target_t *target, u32 mask, u32* core_regs[16])
 {
        int i;
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