X-Git-Url: https://review.openocd.org/gitweb?a=blobdiff_plain;f=src%2Ftarget%2Farm_adi_v5.c;h=ba5db3b13c23bd1faca14cfd2c350524c51a6737;hb=98f7c2127b8800e2597493eea2c7ba5c88940b86;hp=6ca50ab7ce0e0b614538ba98dbb7e8bc90cc425d;hpb=6512e5e36b067ae458cb7f6a9fdfb08d38da3583;p=openocd.git diff --git a/src/target/arm_adi_v5.c b/src/target/arm_adi_v5.c index 6ca50ab7ce..ba5db3b13c 100644 --- a/src/target/arm_adi_v5.c +++ b/src/target/arm_adi_v5.c @@ -7,7 +7,7 @@ * * * Copyright (C) 2009 by Oyvind 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 * @@ -23,16 +23,34 @@ * Free Software Foundation, Inc., * * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * ***************************************************************************/ -/*************************************************************************** - * * - * This file implements support for the ARM Debug Interface v5 (ADI_V5) * - * * - * ARM(tm) Debug Interface v5 Architecture Specification ARM IHI 0031A * - * * - * CoreSight(tm) DAP-Lite TRM, ARM DDI 0316D * - * Cortex-M3(tm) TRM, ARM DDI 0337G * - * * -***************************************************************************/ + +/** + * @file + * This file implements support for the ARM Debug Interface version 5 (ADIv5) + * debugging architecture. Compared with previous versions, this includes + * a low pin-count Serial Wire Debug (SWD) alternative to JTAG for message + * transport, and focusses on memory mapped resources as defined by the + * CoreSight architecture. + * + * A key concept in ADIv5 is the Debug Access Port, or DAP. A DAP has two + * basic components: a Debug Port (DP) transporting messages to and from a + * debugger, and an Access Port (AP) accessing resources. Three types of DP + * are defined. One uses only JTAG for communication, and is called JTAG-DP. + * One uses only SWD for communication, and is called SW-DP. The third can + * use either SWD or JTAG, and is called SWJ-DP. The most common type of AP + * is used to access memory mapped resources and is called a MEM-AP. Also a + * JTAG-AP is also defined, bridging to JTAG resources; those are uncommon. + */ + +/* + * Relevant specifications from ARM include: + * + * ARM(tm) Debug Interface v5 Architecture Specification ARM IHI 0031A + * CoreSight(tm) v1.0 Architecture Specification ARM IHI 0029B + * + * CoreSight(tm) DAP-Lite TRM, ARM DDI 0316D + * Cortex-M3(tm) TRM, ARM DDI 0337G + */ #ifdef HAVE_CONFIG_H #include "config.h" @@ -70,8 +88,27 @@ static uint32_t max_tar_block_size(uint32_t tar_autoincr_block, uint32_t address * * ***************************************************************************/ -/* Scan out and in from target ordered uint8_t buffers */ -int adi_jtag_dp_scan(struct swjdp_common *swjdp, uint8_t instr, uint8_t reg_addr, uint8_t RnW, uint8_t *outvalue, uint8_t *invalue, uint8_t *ack) +/** + * Scan DPACC or APACC using target ordered uint8_t buffers. No endianness + * conversions are performed. See section 4.4.3 of the ADIv5 spec, which + * discusses operations which access these registers. + * + * Note that only one scan is performed. If RnW is set, a separate scan + * will be needed to collect the data which was read; the "invalue" collects + * the posted result of a preceding operation, not the current one. + * + * @param swjdp the DAP + * @param instr JTAG_DP_APACC (AP access) or JTAG_DP_DPACC (DP access) + * @param reg_addr two significant bits; A[3:2]; for APACC access, the + * SELECT register has more addressing bits. + * @param RnW false iff outvalue will be written to the DP or AP + * @param outvalue points to a 32-bit (little-endian) integer + * @param invalue NULL, or points to a 32-bit (little-endian) integer + * @param ack points to where the three bit JTAG_ACK_* code will be stored + */ +static int adi_jtag_dp_scan(struct swjdp_common *swjdp, + uint8_t instr, uint8_t reg_addr, uint8_t RnW, + uint8_t *outvalue, uint8_t *invalue, uint8_t *ack) { struct arm_jtag *jtag_info = swjdp->jtag_info; struct scan_field fields[2]; @@ -81,15 +118,31 @@ int adi_jtag_dp_scan(struct swjdp_common *swjdp, uint8_t instr, uint8_t reg_addr arm_jtag_set_instr(jtag_info, instr, NULL); /* Add specified number of tck clocks before accessing memory bus */ - if ((instr == DAP_IR_APACC) && ((reg_addr == AP_REG_DRW)||((reg_addr&0xF0) == AP_REG_BD0))&& (swjdp->memaccess_tck != 0)) + + /* REVISIT these TCK cycles should be *AFTER* updating APACC, since + * they provide more time for the (MEM) AP to complete the read ... + * See "Minimum Response Time" for JTAG-DP, in the ADIv5 spec. + */ + if ((instr == JTAG_DP_APACC) + && ((reg_addr == AP_REG_DRW) + || ((reg_addr & 0xF0) == AP_REG_BD0)) + && (swjdp->memaccess_tck != 0)) jtag_add_runtest(swjdp->memaccess_tck, jtag_set_end_state(TAP_IDLE)); + /* Scan out a read or write operation using some DP or AP register. + * For APACC access with any sticky error flag set, this is discarded. + */ fields[0].tap = jtag_info->tap; fields[0].num_bits = 3; buf_set_u32(&out_addr_buf, 0, 3, ((reg_addr >> 1) & 0x6) | (RnW & 0x1)); fields[0].out_value = &out_addr_buf; fields[0].in_value = ack; + /* NOTE: if we receive JTAG_ACK_WAIT, the previous operation did not + * complete; data we write is discarded, data we read is unpredictable. + * When overrun detect is active, STICKYORUN is set. + */ + fields[1].tap = jtag_info->tap; fields[1].num_bits = 32; fields[1].out_value = outvalue; @@ -101,7 +154,9 @@ int adi_jtag_dp_scan(struct swjdp_common *swjdp, uint8_t instr, uint8_t reg_addr } /* Scan out and in from host ordered uint32_t variables */ -int adi_jtag_dp_scan_u32(struct swjdp_common *swjdp, uint8_t instr, uint8_t reg_addr, uint8_t RnW, uint32_t outvalue, uint32_t *invalue, uint8_t *ack) +static int adi_jtag_dp_scan_u32(struct swjdp_common *swjdp, + uint8_t instr, uint8_t reg_addr, uint8_t RnW, + uint32_t outvalue, uint32_t *invalue, uint8_t *ack) { struct arm_jtag *jtag_info = swjdp->jtag_info; struct scan_field fields[2]; @@ -112,7 +167,14 @@ int adi_jtag_dp_scan_u32(struct swjdp_common *swjdp, uint8_t instr, uint8_t reg_ arm_jtag_set_instr(jtag_info, instr, NULL); /* Add specified number of tck clocks before accessing memory bus */ - if ((instr == DAP_IR_APACC) && ((reg_addr == AP_REG_DRW)||((reg_addr&0xF0) == AP_REG_BD0))&& (swjdp->memaccess_tck != 0)) + + /* REVISIT these TCK cycles should be *AFTER* updating APACC, since + * they provide more time for the (MEM) AP to complete the read ... + */ + if ((instr == JTAG_DP_APACC) + && ((reg_addr == AP_REG_DRW) + || ((reg_addr & 0xF0) == AP_REG_BD0)) + && (swjdp->memaccess_tck != 0)) jtag_add_runtest(swjdp->memaccess_tck, jtag_set_end_state(TAP_IDLE)); fields[0].tap = jtag_info->tap; @@ -143,38 +205,46 @@ int adi_jtag_dp_scan_u32(struct swjdp_common *swjdp, uint8_t instr, uint8_t reg_ } /* scan_inout_check adds one extra inscan for DPAP_READ commands to read variables */ -int scan_inout_check(struct swjdp_common *swjdp, uint8_t instr, uint8_t reg_addr, uint8_t RnW, uint8_t *outvalue, uint8_t *invalue) +static int scan_inout_check(struct swjdp_common *swjdp, + uint8_t instr, uint8_t reg_addr, uint8_t RnW, + uint8_t *outvalue, uint8_t *invalue) { adi_jtag_dp_scan(swjdp, instr, reg_addr, RnW, outvalue, NULL, NULL); if ((RnW == DPAP_READ) && (invalue != NULL)) - { - adi_jtag_dp_scan(swjdp, DAP_IR_DPACC, DP_RDBUFF, DPAP_READ, 0, invalue, &swjdp->ack); - } - - /* In TRANS_MODE_ATOMIC all DAP_IR_APACC transactions wait for ack = OK/FAULT and the check CTRL_STAT */ - if ((instr == DAP_IR_APACC) && (swjdp->trans_mode == TRANS_MODE_ATOMIC)) - { + adi_jtag_dp_scan(swjdp, JTAG_DP_DPACC, + DP_RDBUFF, DPAP_READ, 0, invalue, &swjdp->ack); + + /* In TRANS_MODE_ATOMIC all JTAG_DP_APACC transactions wait for + * ack = OK/FAULT and the check CTRL_STAT + */ + if ((instr == JTAG_DP_APACC) + && (swjdp->trans_mode == TRANS_MODE_ATOMIC)) return swjdp_transaction_endcheck(swjdp); - } return ERROR_OK; } -int scan_inout_check_u32(struct swjdp_common *swjdp, uint8_t instr, uint8_t reg_addr, uint8_t RnW, uint32_t outvalue, uint32_t *invalue) +static int scan_inout_check_u32(struct swjdp_common *swjdp, + uint8_t instr, uint8_t reg_addr, uint8_t RnW, + uint32_t outvalue, uint32_t *invalue) { + /* Issue the read or write */ adi_jtag_dp_scan_u32(swjdp, instr, reg_addr, RnW, outvalue, NULL, NULL); + /* For reads, collect posted value; RDBUFF has no other effect. + * Assumes read gets acked with OK/FAULT, and CTRL_STAT says "OK". + */ if ((RnW == DPAP_READ) && (invalue != NULL)) - { - adi_jtag_dp_scan_u32(swjdp, DAP_IR_DPACC, DP_RDBUFF, DPAP_READ, 0, invalue, &swjdp->ack); - } - - /* In TRANS_MODE_ATOMIC all DAP_IR_APACC transactions wait for ack = OK/FAULT and then check CTRL_STAT */ - if ((instr == DAP_IR_APACC) && (swjdp->trans_mode == TRANS_MODE_ATOMIC)) - { + adi_jtag_dp_scan_u32(swjdp, JTAG_DP_DPACC, + DP_RDBUFF, DPAP_READ, 0, invalue, &swjdp->ack); + + /* In TRANS_MODE_ATOMIC all JTAG_DP_APACC transactions wait for + * ack = OK/FAULT and then check CTRL_STAT + */ + if ((instr == JTAG_DP_APACC) + && (swjdp->trans_mode == TRANS_MODE_ATOMIC)) return swjdp_transaction_endcheck(swjdp); - } return ERROR_OK; } @@ -188,7 +258,8 @@ int swjdp_transaction_endcheck(struct swjdp_common *swjdp) #if 0 /* Danger!!!! BROKEN!!!! */ - scan_inout_check_u32(swjdp, DAP_IR_DPACC, DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat); + scan_inout_check_u32(swjdp, JTAG_DP_DPACC, + DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat); /* Danger!!!! BROKEN!!!! Why will jtag_execute_queue() fail here???? R956 introduced the check on return value here and now Michael Schwingen reports that this code no longer works.... @@ -202,39 +273,50 @@ int swjdp_transaction_endcheck(struct swjdp_common *swjdp) /* Why??? second time it works??? */ #endif - scan_inout_check_u32(swjdp, DAP_IR_DPACC, DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat); + /* Post CTRL/STAT read; discard any previous posted read value + * but collect its ACK status. + */ + scan_inout_check_u32(swjdp, JTAG_DP_DPACC, + DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat); if ((retval = jtag_execute_queue()) != ERROR_OK) return retval; swjdp->ack = swjdp->ack & 0x7; - if (swjdp->ack != 2) + /* common code path avoids calling timeval_ms() */ + if (swjdp->ack != JTAG_ACK_OK_FAULT) { long long then = timeval_ms(); - while (swjdp->ack != 2) + + while (swjdp->ack != JTAG_ACK_OK_FAULT) { - if (swjdp->ack == 1) + if (swjdp->ack == JTAG_ACK_WAIT) { if ((timeval_ms()-then) > 1000) { - LOG_WARNING("Timeout (1000ms) waiting for ACK = OK/FAULT in SWJDP transaction"); + /* NOTE: this would be a good spot + * to use JTAG_DP_ABORT. + */ + LOG_WARNING("Timeout (1000ms) waiting " + "for ACK=OK/FAULT " + "in JTAG-DP transaction"); return ERROR_JTAG_DEVICE_ERROR; } } else { - LOG_WARNING("Invalid ACK in SWJDP transaction"); + LOG_WARNING("Invalid ACK %#x" + "in JTAG-DP transaction", + swjdp->ack); return ERROR_JTAG_DEVICE_ERROR; } - scan_inout_check_u32(swjdp, DAP_IR_DPACC, DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat); + scan_inout_check_u32(swjdp, JTAG_DP_DPACC, + DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat); if ((retval = jtag_execute_queue()) != ERROR_OK) return retval; swjdp->ack = swjdp->ack & 0x7; } - } else - { - /* common code path avoids fn to timeval_ms() */ } /* Check for STICKYERR and STICKYORUN */ @@ -253,14 +335,19 @@ int swjdp_transaction_endcheck(struct swjdp_common *swjdp) /* Print information about last AHBAP access */ LOG_ERROR("AHBAP Cached values: dp_select 0x%" PRIx32 ", ap_csw 0x%" PRIx32 ", ap_tar 0x%" PRIx32 "", swjdp->dp_select_value, swjdp->ap_csw_value, swjdp->ap_tar_value); if (ctrlstat & SSTICKYORUN) - LOG_ERROR("SWJ-DP OVERRUN - check clock or reduce jtag speed"); + LOG_ERROR("JTAG-DP OVERRUN - " + "check clock or reduce jtag speed"); if (ctrlstat & SSTICKYERR) - LOG_ERROR("SWJ-DP STICKY ERROR"); + LOG_ERROR("JTAG-DP STICKY ERROR"); /* Clear Sticky Error Bits */ - scan_inout_check_u32(swjdp, DAP_IR_DPACC, DP_CTRL_STAT, DPAP_WRITE, swjdp->dp_ctrl_stat | SSTICKYORUN | SSTICKYERR, NULL); - scan_inout_check_u32(swjdp, DAP_IR_DPACC, DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat); + scan_inout_check_u32(swjdp, JTAG_DP_DPACC, + DP_CTRL_STAT, DPAP_WRITE, + swjdp->dp_ctrl_stat | SSTICKYORUN + | SSTICKYERR, NULL); + scan_inout_check_u32(swjdp, JTAG_DP_DPACC, + DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat); if ((retval = jtag_execute_queue()) != ERROR_OK) return retval; @@ -287,14 +374,18 @@ int swjdp_transaction_endcheck(struct swjdp_common *swjdp) * * ***************************************************************************/ -int dap_dp_write_reg(struct swjdp_common *swjdp, uint32_t value, uint8_t reg_addr) +static int dap_dp_write_reg(struct swjdp_common *swjdp, + uint32_t value, uint8_t reg_addr) { - return scan_inout_check_u32(swjdp, DAP_IR_DPACC, reg_addr, DPAP_WRITE, value, NULL); + return scan_inout_check_u32(swjdp, JTAG_DP_DPACC, + reg_addr, DPAP_WRITE, value, NULL); } -int dap_dp_read_reg(struct swjdp_common *swjdp, uint32_t *value, uint8_t reg_addr) +static int dap_dp_read_reg(struct swjdp_common *swjdp, + uint32_t *value, uint8_t reg_addr) { - return scan_inout_check_u32(swjdp, DAP_IR_DPACC, reg_addr, DPAP_READ, 0, value); + return scan_inout_check_u32(swjdp, JTAG_DP_DPACC, + reg_addr, DPAP_READ, 0, value); } int dap_ap_select(struct swjdp_common *swjdp,uint8_t apsel) @@ -314,7 +405,7 @@ int dap_ap_select(struct swjdp_common *swjdp,uint8_t apsel) return ERROR_OK; } -int dap_dp_bankselect(struct swjdp_common *swjdp,uint32_t ap_reg) +static int dap_dp_bankselect(struct swjdp_common *swjdp, uint32_t ap_reg) { uint32_t select; select = (ap_reg & 0x000000F0); @@ -328,28 +419,24 @@ int dap_dp_bankselect(struct swjdp_common *swjdp,uint32_t ap_reg) return ERROR_OK; } -int dap_ap_write_reg(struct swjdp_common *swjdp, uint32_t reg_addr, uint8_t* out_value_buf) +static int dap_ap_write_reg(struct swjdp_common *swjdp, + uint32_t reg_addr, uint8_t *out_value_buf) { dap_dp_bankselect(swjdp, reg_addr); - scan_inout_check(swjdp, DAP_IR_APACC, reg_addr, DPAP_WRITE, out_value_buf, NULL); + scan_inout_check(swjdp, JTAG_DP_APACC, reg_addr, + DPAP_WRITE, out_value_buf, NULL); return ERROR_OK; } -int dap_ap_read_reg(struct swjdp_common *swjdp, uint32_t reg_addr, uint8_t *in_value_buf) -{ - dap_dp_bankselect(swjdp, reg_addr); - scan_inout_check(swjdp, DAP_IR_APACC, reg_addr, DPAP_READ, 0, in_value_buf); - - return ERROR_OK; -} int dap_ap_write_reg_u32(struct swjdp_common *swjdp, uint32_t reg_addr, uint32_t value) { uint8_t out_value_buf[4]; buf_set_u32(out_value_buf, 0, 32, value); dap_dp_bankselect(swjdp, reg_addr); - scan_inout_check(swjdp, DAP_IR_APACC, reg_addr, DPAP_WRITE, out_value_buf, NULL); + scan_inout_check(swjdp, JTAG_DP_APACC, reg_addr, + DPAP_WRITE, out_value_buf, NULL); return ERROR_OK; } @@ -357,7 +444,8 @@ int dap_ap_write_reg_u32(struct swjdp_common *swjdp, uint32_t reg_addr, uint32_t int dap_ap_read_reg_u32(struct swjdp_common *swjdp, uint32_t reg_addr, uint32_t *value) { dap_dp_bankselect(swjdp, reg_addr); - scan_inout_check_u32(swjdp, DAP_IR_APACC, reg_addr, DPAP_READ, 0, value); + scan_inout_check_u32(swjdp, JTAG_DP_APACC, reg_addr, + DPAP_READ, 0, value); return ERROR_OK; } @@ -516,7 +604,8 @@ int mem_ap_write_buf_u32(struct swjdp_common *swjdp, uint8_t *buffer, int count, return retval; } -int mem_ap_write_buf_packed_u16(struct swjdp_common *swjdp, uint8_t *buffer, int count, uint32_t address) +static int mem_ap_write_buf_packed_u16(struct swjdp_common *swjdp, + uint8_t *buffer, int count, uint32_t address) { int retval = ERROR_OK; int wcount, blocksize, writecount, i; @@ -612,7 +701,8 @@ int mem_ap_write_buf_u16(struct swjdp_common *swjdp, uint8_t *buffer, int count, return retval; } -int mem_ap_write_buf_packed_u8(struct swjdp_common *swjdp, uint8_t *buffer, int count, uint32_t address) +static int mem_ap_write_buf_packed_u8(struct swjdp_common *swjdp, + uint8_t *buffer, int count, uint32_t address) { int retval = ERROR_OK; int wcount, blocksize, writecount, i; @@ -734,15 +824,25 @@ int mem_ap_read_buf_u32(struct swjdp_common *swjdp, uint8_t *buffer, int count, dap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_SINGLE, address); /* Scan out first read */ - adi_jtag_dp_scan(swjdp, DAP_IR_APACC, AP_REG_DRW, DPAP_READ, 0, NULL, NULL); + adi_jtag_dp_scan(swjdp, JTAG_DP_APACC, AP_REG_DRW, + DPAP_READ, 0, NULL, NULL); for (readcount = 0; readcount < blocksize - 1; readcount++) { - /* Scan out read instruction and scan in previous value */ - adi_jtag_dp_scan(swjdp, DAP_IR_APACC, AP_REG_DRW, DPAP_READ, 0, buffer + 4 * readcount, &swjdp->ack); + /* Scan out next read; scan in posted value for the + * previous one. Assumes read is acked "OK/FAULT", + * and CTRL_STAT says that meant "OK". + */ + adi_jtag_dp_scan(swjdp, JTAG_DP_APACC, AP_REG_DRW, + DPAP_READ, 0, buffer + 4 * readcount, + &swjdp->ack); } - /* Scan in last value */ - adi_jtag_dp_scan(swjdp, DAP_IR_DPACC, DP_RDBUFF, DPAP_READ, 0, buffer + 4 * readcount, &swjdp->ack); + /* Scan in last posted value; RDBUFF has no other effect, + * assuming ack is OK/FAULT and CTRL_STAT says "OK". + */ + adi_jtag_dp_scan(swjdp, JTAG_DP_DPACC, DP_RDBUFF, + DPAP_READ, 0, buffer + 4 * readcount, + &swjdp->ack); if (swjdp_transaction_endcheck(swjdp) == ERROR_OK) { wcount = wcount - blocksize; @@ -782,7 +882,8 @@ int mem_ap_read_buf_u32(struct swjdp_common *swjdp, uint8_t *buffer, int count, return retval; } -int mem_ap_read_buf_packed_u16(struct swjdp_common *swjdp, uint8_t *buffer, int count, uint32_t address) +static int mem_ap_read_buf_packed_u16(struct swjdp_common *swjdp, + uint8_t *buffer, int count, uint32_t address) { uint32_t invalue; int retval = ERROR_OK; @@ -877,7 +978,8 @@ int mem_ap_read_buf_u16(struct swjdp_common *swjdp, uint8_t *buffer, int count, * The solution is to arrange for a large out/in scan in this loop and * and convert data afterwards. */ -int mem_ap_read_buf_packed_u8(struct swjdp_common *swjdp, uint8_t *buffer, int count, uint32_t address) +static int mem_ap_read_buf_packed_u8(struct swjdp_common *swjdp, + uint8_t *buffer, int count, uint32_t address) { uint32_t invalue; int retval = ERROR_OK; @@ -950,6 +1052,13 @@ int mem_ap_read_buf_u8(struct swjdp_common *swjdp, uint8_t *buffer, int count, u return retval; } +/** + * Initialize a DAP. + * + * @todo Rename this. We also need an initialization scheme which account + * for SWD transports not just JTAG; that will need to address differences + * in layering. (JTAG is useful without any debug target; but not SWD.) + */ int ahbap_debugport_init(struct swjdp_common *swjdp) { uint32_t idreg, romaddr, dummy; @@ -959,9 +1068,17 @@ int ahbap_debugport_init(struct swjdp_common *swjdp) LOG_DEBUG(" "); + /* Default MEM-AP setup. + * + * REVISIT AP #0 may be an inappropriate default for this. + * Should we probe, or receve a hint from the caller? + * Presumably we can ignore the possibility of multiple APs. + */ swjdp->apsel = 0; swjdp->ap_csw_value = -1; swjdp->ap_tar_value = -1; + + /* DP initialization */ swjdp->trans_mode = TRANS_MODE_ATOMIC; dap_dp_read_reg(swjdp, &dummy, DP_CTRL_STAT); dap_dp_write_reg(swjdp, SSTICKYERR, DP_CTRL_STAT); @@ -999,8 +1116,14 @@ int ahbap_debugport_init(struct swjdp_common *swjdp) dap_dp_write_reg(swjdp, swjdp->dp_ctrl_stat, DP_CTRL_STAT); dap_dp_read_reg(swjdp, &dummy, DP_CTRL_STAT); - dap_ap_read_reg_u32(swjdp, 0xFC, &idreg); - dap_ap_read_reg_u32(swjdp, 0xF8, &romaddr); + /* + * REVISIT this isn't actually *initializing* anything in an AP, + * and doesn't care if it's a MEM-AP at all (much less AHB-AP). + * Should it? If the ROM address is valid, is this the right + * place to scan the table and do any topology detection? + */ + dap_ap_read_reg_u32(swjdp, AP_REG_IDR, &idreg); + dap_ap_read_reg_u32(swjdp, AP_REG_BASE, &romaddr); LOG_DEBUG("AHB-AP ID Register 0x%" PRIx32 ", Debug ROM Address 0x%" PRIx32 "", idreg, romaddr); @@ -1028,37 +1151,43 @@ is_dap_cid_ok(uint32_t cid3, uint32_t cid2, uint32_t cid1, uint32_t cid0) int dap_info_command(struct command_context *cmd_ctx, struct swjdp_common *swjdp, int apsel) { - uint32_t dbgbase,apid; + uint32_t dbgbase, apid; int romtable_present = 0; uint8_t mem_ap; uint32_t apselold; apselold = swjdp->apsel; dap_ap_select(swjdp, apsel); - dap_ap_read_reg_u32(swjdp, 0xF8, &dbgbase); - dap_ap_read_reg_u32(swjdp, 0xFC, &apid); + dap_ap_read_reg_u32(swjdp, AP_REG_BASE, &dbgbase); + dap_ap_read_reg_u32(swjdp, AP_REG_IDR, &apid); swjdp_transaction_endcheck(swjdp); /* Now we read ROM table ID registers, ref. ARM IHI 0029B sec */ mem_ap = ((apid&0x10000) && ((apid&0x0F) != 0)); - command_print(cmd_ctx, "ap identification register 0x%8.8" PRIx32 "", apid); + command_print(cmd_ctx, "AP ID register 0x%8.8" PRIx32, apid); if (apid) { switch (apid&0x0F) { case 0: - command_print(cmd_ctx, "\tType is jtag-ap"); + command_print(cmd_ctx, "\tType is JTAG-AP"); break; case 1: - command_print(cmd_ctx, "\tType is mem-ap AHB"); + command_print(cmd_ctx, "\tType is MEM-AP AHB"); break; case 2: - command_print(cmd_ctx, "\tType is mem-ap APB"); + command_print(cmd_ctx, "\tType is MEM-AP APB"); break; default: - command_print(cmd_ctx, "\tUnknown AP-type"); - break; + command_print(cmd_ctx, "\tUnknown AP type"); + break; } - command_print(cmd_ctx, "ap debugbase 0x%8.8" PRIx32 "", dbgbase); + + /* NOTE: a MEM-AP may have a single CoreSight component that's + * not a ROM table ... or have no such components at all. + */ + if (mem_ap) + command_print(cmd_ctx, "AP BASE 0x%8.8" PRIx32, + dbgbase); } else { @@ -1387,7 +1516,7 @@ DAP_COMMAND_HANDLER(dap_baseaddr_command) if (apselsave != apsel) dap_ap_select(swjdp, apsel); - dap_ap_read_reg_u32(swjdp, 0xF8, &baseaddr); + dap_ap_read_reg_u32(swjdp, AP_REG_BASE, &baseaddr); retval = swjdp_transaction_endcheck(swjdp); command_print(CMD_CTX, "0x%8.8" PRIx32, baseaddr); @@ -1436,7 +1565,7 @@ DAP_COMMAND_HANDLER(dap_apsel_command) } dap_ap_select(swjdp, apsel); - dap_ap_read_reg_u32(swjdp, 0xFC, &apid); + dap_ap_read_reg_u32(swjdp, AP_REG_IDR, &apid); retval = swjdp_transaction_endcheck(swjdp); command_print(CMD_CTX, "ap %" PRIi32 " selected, identification register 0x%8.8" PRIx32, apsel, apid); @@ -1464,7 +1593,7 @@ DAP_COMMAND_HANDLER(dap_apid_command) if (apselsave != apsel) dap_ap_select(swjdp, apsel); - dap_ap_read_reg_u32(swjdp, 0xFC, &apid); + dap_ap_read_reg_u32(swjdp, AP_REG_IDR, &apid); retval = swjdp_transaction_endcheck(swjdp); command_print(CMD_CTX, "0x%8.8" PRIx32, apid); if (apselsave != apsel)