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openocd/src/target/cortex_swjdp.c

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/***************************************************************************
* Copyright (C) 2006 by Magnus Lundin *
* lundin@mlu.mine.nu *
* *
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* *
* 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. *
***************************************************************************/
/***************************************************************************
* *
* CoreSight (Light?) SerialWireJtagDebugPort *
* *
* CoreSight(tm) DAP-Lite TRM, ARM DDI 0316A *
* Cortex-M3(tm) TRM, ARM DDI 0337C *
* *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "replacements.h"
#include "cortex_m3.h"
#include "cortex_swjdp.h"
#include "jtag.h"
#include "log.h"
#include "time_support.h"
#include <stdlib.h>
/*
* Transaction Mode:
* swjdp->trans_mode = TRANS_MODE_COMPOSITE;
* Uses Overrun checking mode and does not do actual JTAG send/receive or transaction
* result checking until swjdp_end_transaction()
* This must be done before using or deallocating any return variables.
* swjdp->trans_mode == TRANS_MODE_ATOMIC
* All reads and writes to the AHB bus are checked for valid completion, and return values
* are immediatley available.
*/
/***************************************************************************
* *
* DPACC and APACC scanchain access through JTAG-DR *
* *
***************************************************************************/
/* Scan out and in from target ordered u8 buffers */
int swjdp_scan(arm_jtag_t *jtag_info, u8 instr, u8 reg_addr, u8 RnW, u8 *outvalue, u8 *invalue, u8 *ack)
{
scan_field_t fields[2];
u8 out_addr_buf;
jtag_add_end_state(TAP_RTI);
arm_jtag_set_instr(jtag_info, instr, NULL);
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].out_mask = NULL;
fields[0].in_value = ack;
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 = outvalue;
fields[1].out_mask = NULL;
fields[1].in_value = invalue;
fields[1].in_handler = NULL;
fields[1].in_handler_priv = NULL;
fields[1].in_check_value = NULL;
fields[1].in_check_mask = NULL;
jtag_add_dr_scan(2, fields, -1);
return ERROR_OK;
}
/* Scan out and in from host ordered u32 variables */
int swjdp_scan_u32(arm_jtag_t *jtag_info, u8 instr, u8 reg_addr, u8 RnW, u32 outvalue, u32 *invalue, u8 *ack)
{
scan_field_t fields[2];
u8 out_value_buf[4];
u8 out_addr_buf;
jtag_add_end_state(TAP_RTI);
arm_jtag_set_instr(jtag_info, instr, NULL);
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].out_mask = NULL;
fields[0].in_value = ack;
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;
buf_set_u32(out_value_buf, 0, 32, outvalue);
fields[1].out_value = out_value_buf;
fields[1].out_mask = NULL;
fields[1].in_value = NULL;
if (invalue)
{
fields[1].in_handler = arm_jtag_buf_to_u32;
fields[1].in_handler_priv = invalue;
}
else
{
fields[1].in_handler = NULL;
fields[1].in_handler_priv = NULL;
}
fields[1].in_check_value = NULL;
fields[1].in_check_mask = NULL;
jtag_add_dr_scan(2, fields, -1);
return ERROR_OK;
}
/* scan_inout_check adds one extra inscan for DPAP_READ commands to read variables */
int scan_inout_check(swjdp_common_t *swjdp, u8 instr, u8 reg_addr, u8 RnW, u8 *outvalue, u8 *invalue)
{
swjdp_scan(swjdp->jtag_info, instr, reg_addr, RnW, outvalue, NULL, NULL);
if ((RnW == DPAP_READ) && (invalue != NULL))
{
swjdp_scan(swjdp->jtag_info, SWJDP_IR_DPACC, DP_RDBUFF, DPAP_READ, 0, invalue, &swjdp->ack);
}
/* In TRANS_MODE_ATOMIC all SWJDP_IR_APACC transactions wait for ack=OK/FAULT and the check CTRL_STAT */
if ((instr == SWJDP_IR_APACC) && (swjdp->trans_mode == TRANS_MODE_ATOMIC))
{
return swjdp_transaction_endcheck(swjdp);
}
return ERROR_OK;
}
int scan_inout_check_u32(swjdp_common_t *swjdp, u8 instr, u8 reg_addr, u8 RnW, u32 outvalue, u32 *invalue)
{
swjdp_scan_u32(swjdp->jtag_info, instr, reg_addr, RnW, outvalue, NULL, NULL);
if ((RnW==DPAP_READ) && (invalue != NULL))
{
swjdp_scan_u32(swjdp->jtag_info, SWJDP_IR_DPACC, DP_RDBUFF, DPAP_READ, 0, invalue, &swjdp->ack);
}
/* In TRANS_MODE_ATOMIC all SWJDP_IR_APACC transactions wait for ack=OK/FAULT and then check CTRL_STAT */
if ((instr == SWJDP_IR_APACC) && (swjdp->trans_mode == TRANS_MODE_ATOMIC))
{
return swjdp_transaction_endcheck(swjdp);
}
return ERROR_OK;
}
int swjdp_transaction_endcheck(swjdp_common_t *swjdp)
{
int retval;
u32 ctrlstat;
keep_alive();
/* Danger!!!! BROKEN!!!! */
scan_inout_check_u32(swjdp, SWJDP_IR_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....
https://lists.berlios.de/pipermail/openocd-development/2008-September/003107.html
*/
if ((retval=jtag_execute_queue())!=ERROR_OK)
{
LOG_ERROR("BUG: Why does this fail the first time????");
}
/* Why??? second time it works??? */
scan_inout_check_u32(swjdp, SWJDP_IR_DPACC, DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat);
if ((retval=jtag_execute_queue())!=ERROR_OK)
return retval;
swjdp->ack = swjdp->ack & 0x7;
long long then=timeval_ms();
while (swjdp->ack != 2)
{
if (swjdp->ack == 1)
{
if ((timeval_ms()-then) > 1000)
{
LOG_WARNING("Timeout (1000ms) waiting for ACK = OK/FAULT in SWJDP transaction");
return ERROR_JTAG_DEVICE_ERROR;
}
}
else
{
LOG_WARNING("Invalid ACK in SWJDP transaction");
return ERROR_JTAG_DEVICE_ERROR;
}
scan_inout_check_u32(swjdp, SWJDP_IR_DPACC, DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat);
if ((retval=jtag_execute_queue())!=ERROR_OK)
return retval;
swjdp->ack = swjdp->ack & 0x7;
}
/* Check for STICKYERR and STICKYORUN */
if (ctrlstat & (SSTICKYORUN | SSTICKYERR))
{
LOG_DEBUG("swjdp: CTRL/STAT error 0x%x", ctrlstat);
/* Check power to debug regions */
if ((ctrlstat & 0xf0000000) != 0xf0000000)
{
ahbap_debugport_init(swjdp);
}
else
{
u32 dcb_dhcsr,nvic_shcsr, nvic_bfar, nvic_cfsr;
if (ctrlstat & SSTICKYORUN)
LOG_ERROR("SWJ-DP OVERRUN - check clock or reduce jtag speed");
if (ctrlstat & SSTICKYERR)
LOG_ERROR("SWJ-DP STICKY ERROR");
/* Clear Sticky Error Bits */
scan_inout_check_u32(swjdp, SWJDP_IR_DPACC, DP_CTRL_STAT, DPAP_WRITE, swjdp->dp_ctrl_stat | SSTICKYORUN | SSTICKYERR, NULL);
scan_inout_check_u32(swjdp, SWJDP_IR_DPACC, DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat);
if ((retval=jtag_execute_queue())!=ERROR_OK)
return retval;
LOG_DEBUG("swjdp: status 0x%x", ctrlstat);
/* Can we find out the reason for the error ?? */
ahbap_read_system_atomic_u32(swjdp, DCB_DHCSR, &dcb_dhcsr);
ahbap_read_system_atomic_u32(swjdp, NVIC_SHCSR, &nvic_shcsr);
ahbap_read_system_atomic_u32(swjdp, NVIC_CFSR, &nvic_cfsr);
ahbap_read_system_atomic_u32(swjdp, NVIC_BFAR, &nvic_bfar);
LOG_ERROR("dcb_dhcsr 0x%x, nvic_shcsr 0x%x, nvic_cfsr 0x%x, nvic_bfar 0x%x", dcb_dhcsr, nvic_shcsr, nvic_cfsr, nvic_bfar);
}
if ((retval=jtag_execute_queue())!=ERROR_OK)
return retval;
return ERROR_JTAG_DEVICE_ERROR;
}
return ERROR_OK;
}
/***************************************************************************
* *
* DP and AHB-AP register access through APACC and DPACC *
* *
***************************************************************************/
int swjdp_write_dpacc(swjdp_common_t *swjdp, u32 value, u8 reg_addr)
{
return scan_inout_check_u32(swjdp, SWJDP_IR_DPACC, reg_addr, DPAP_WRITE, value, NULL);
}
int swjdp_read_dpacc(swjdp_common_t *swjdp, u32 *value, u8 reg_addr)
{
return scan_inout_check_u32(swjdp, SWJDP_IR_DPACC, reg_addr, DPAP_READ, 0, value);
}
int swjdp_bankselect_apacc(swjdp_common_t *swjdp,u32 reg_addr)
{
u32 select;
select = (reg_addr & 0xFF0000F0);
if (select != swjdp->dp_select_value)
{
swjdp_write_dpacc(swjdp, select, DP_SELECT);
swjdp->dp_select_value = select;
}
return ERROR_OK;
}
int ahbap_write_reg(swjdp_common_t *swjdp, u32 reg_addr, u8* out_value_buf)
{
swjdp_bankselect_apacc(swjdp, reg_addr);
scan_inout_check(swjdp, SWJDP_IR_APACC, reg_addr, DPAP_WRITE, out_value_buf, NULL);
return ERROR_OK;
}
int ahbap_read_reg(swjdp_common_t *swjdp, u32 reg_addr, u8 *in_value_buf)
{
swjdp_bankselect_apacc(swjdp, reg_addr);
scan_inout_check(swjdp, SWJDP_IR_APACC, reg_addr, DPAP_READ, 0, in_value_buf);
return ERROR_OK;
}
int ahbap_write_reg_u32(swjdp_common_t *swjdp, u32 reg_addr, u32 value)
{
u8 out_value_buf[4];
buf_set_u32(out_value_buf, 0, 32, value);
swjdp_bankselect_apacc(swjdp, reg_addr);
scan_inout_check(swjdp, SWJDP_IR_APACC, reg_addr, DPAP_WRITE, out_value_buf, NULL);
return ERROR_OK;
}
int ahbap_read_reg_u32(swjdp_common_t *swjdp, u32 reg_addr, u32 *value)
{
swjdp_bankselect_apacc(swjdp, reg_addr);
scan_inout_check_u32(swjdp, SWJDP_IR_APACC, reg_addr, DPAP_READ, 0, value);
return ERROR_OK;
}
/***************************************************************************
* *
* AHB-AP access to memory and system registers on AHB bus *
* *
***************************************************************************/
int ahbap_setup_accessport(swjdp_common_t *swjdp, u32 csw, u32 tar)
{
csw = csw | CSW_DBGSWENABLE | CSW_MASTER_DEBUG | CSW_HPROT;
if (csw != swjdp->ap_csw_value)
{
/* LOG_DEBUG("swjdp : Set CSW %x",csw); */
ahbap_write_reg_u32(swjdp, AHBAP_CSW, csw );
swjdp->ap_csw_value = csw;
}
if (tar != swjdp->ap_tar_value)
{
/* LOG_DEBUG("swjdp : Set TAR %x",tar); */
ahbap_write_reg_u32(swjdp, AHBAP_TAR, tar );
swjdp->ap_tar_value = tar;
}
if (csw & CSW_ADDRINC_MASK)
{
/* Do not cache TAR value when autoincrementing */
swjdp->ap_tar_value = -1;
}
return ERROR_OK;
}
/*****************************************************************************
* *
* ahbap_read_system_u32(swjdp_common_t *swjdp, u32 address, u32 *value) *
* *
* Read a u32 value from memory or system register *
* Functionally equivalent to target_read_u32(target, address, u32 *value), *
* but with less overhead *
*****************************************************************************/
int ahbap_read_system_u32(swjdp_common_t *swjdp, u32 address, u32 *value)
{
swjdp->trans_mode = TRANS_MODE_COMPOSITE;
ahbap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, address & 0xFFFFFFF0);
ahbap_read_reg_u32(swjdp, AHBAP_BD0 | (address & 0xC), value );
return ERROR_OK;
}
int ahbap_read_system_atomic_u32(swjdp_common_t *swjdp, u32 address, u32 *value)
{
ahbap_read_system_u32(swjdp, address, value);
return swjdp_transaction_endcheck(swjdp);
}
/*****************************************************************************
* *
* ahbap_write_system_u32(swjdp_common_t *swjdp, u32 address, u32 value) *
* *
* Write a u32 value to memory or system register *
* *
*****************************************************************************/
int ahbap_write_system_u32(swjdp_common_t *swjdp, u32 address, u32 value)
{
swjdp->trans_mode = TRANS_MODE_COMPOSITE;
ahbap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, address & 0xFFFFFFF0);
ahbap_write_reg_u32(swjdp, AHBAP_BD0 | (address & 0xC), value );
return ERROR_OK;
}
int ahbap_write_system_atomic_u32(swjdp_common_t *swjdp, u32 address, u32 value)
{
ahbap_write_system_u32(swjdp, address, value);
return swjdp_transaction_endcheck(swjdp);
}
/*****************************************************************************
* *
* ahbap_write_buf(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address) *
* *
* Write a buffer in target order (little endian) *
* *
*****************************************************************************/
int ahbap_write_buf_u32(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
{
u32 outvalue;
int wcount, blocksize, writecount, errorcount = 0, retval = ERROR_OK;
u32 adr = address;
u8* pBuffer = buffer;
swjdp->trans_mode = TRANS_MODE_COMPOSITE;
count >>= 2;
wcount = count;
/* if we have an unaligned access - reorder data */
if (adr & 0x3u)
{
for (writecount = 0; writecount < count; writecount++)
{
int i;
outvalue = *((u32*)pBuffer);
for (i = 0; i < 4; i++ )
{
*((u8*)pBuffer + (adr & 0x3)) = outvalue;
outvalue >>= 8;
adr++;
}
pBuffer += 4;
}
}
while (wcount > 0)
{
/* Adjust to write blocks within 4K aligned boundaries */
blocksize = (0x1000 - (0xFFF & address)) >> 2;
if (wcount < blocksize)
blocksize = wcount;
/* handle unaligned data at 4k boundary */
if (blocksize == 0)
blocksize = 1;
ahbap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_SINGLE, address);
for (writecount = 0; writecount < blocksize; writecount++)
{
ahbap_write_reg(swjdp, AHBAP_DRW, buffer + 4 * writecount );
}
if (swjdp_transaction_endcheck(swjdp) == ERROR_OK)
{
wcount = wcount - blocksize;
address = address + 4 * blocksize;
buffer = buffer + 4 * blocksize;
}
else
{
errorcount++;
}
if (errorcount > 1)
{
LOG_WARNING("Block write error address 0x%x, wcount 0x%x", address, wcount);
return ERROR_JTAG_DEVICE_ERROR;
}
}
return retval;
}
int ahbap_write_buf_packed_u16(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
{
u32 outvalue;
int retval = ERROR_OK;
int wcount, blocksize, writecount, i;
swjdp->trans_mode = TRANS_MODE_COMPOSITE;
wcount = count >> 1;
while (wcount > 0)
{
int nbytes;
/* Adjust to read within 4K block boundaries */
blocksize = (0x1000 - (0xFFF & address)) >> 1;
if (wcount < blocksize)
blocksize = wcount;
/* handle unaligned data at 4k boundary */
if (blocksize == 0)
blocksize = 1;
ahbap_setup_accessport(swjdp, CSW_16BIT | CSW_ADDRINC_PACKED, address);
writecount = blocksize;
do
{
nbytes = MIN((writecount << 1), 4);
if (nbytes < 4 )
{
if (ahbap_write_buf_u16(swjdp, buffer, nbytes, address) != ERROR_OK)
{
LOG_WARNING("Block read error address 0x%x, count 0x%x", address, count);
return ERROR_JTAG_DEVICE_ERROR;
}
address += nbytes >> 1;
}
else
{
outvalue = *((u32*)buffer);
for (i = 0; i < nbytes; i++ )
{
*((u8*)buffer + (address & 0x3)) = outvalue;
outvalue >>= 8;
address++;
}
outvalue = *((u32*)buffer);
ahbap_write_reg_u32(swjdp, AHBAP_DRW, outvalue);
if (swjdp_transaction_endcheck(swjdp) != ERROR_OK)
{
LOG_WARNING("Block read error address 0x%x, count 0x%x", address, count);
return ERROR_JTAG_DEVICE_ERROR;
}
}
buffer += nbytes >> 1;
writecount -= nbytes >> 1;
} while (writecount);
wcount -= blocksize;
}
return retval;
}
int ahbap_write_buf_u16(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
{
u32 outvalue;
int retval = ERROR_OK;
if (count >= 4)
return ahbap_write_buf_packed_u16(swjdp, buffer, count, address);
swjdp->trans_mode = TRANS_MODE_COMPOSITE;
while (count > 0)
{
ahbap_setup_accessport(swjdp, CSW_16BIT | CSW_ADDRINC_SINGLE, address);
outvalue = *((u16*)buffer) << 8 * (address & 0x3);
ahbap_write_reg_u32(swjdp, AHBAP_DRW, outvalue );
retval = swjdp_transaction_endcheck(swjdp);
count -= 2;
address += 2;
buffer += 2;
}
return retval;
}
int ahbap_write_buf_packed_u8(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
{
u32 outvalue;
int retval = ERROR_OK;
int wcount, blocksize, writecount, i;
swjdp->trans_mode = TRANS_MODE_COMPOSITE;
wcount = count;
while (wcount > 0)
{
int nbytes;
/* Adjust to read within 4K block boundaries */
blocksize = (0x1000 - (0xFFF & address));
if (wcount < blocksize)
blocksize = wcount;
ahbap_setup_accessport(swjdp, CSW_8BIT | CSW_ADDRINC_PACKED, address);
writecount = blocksize;
do
{
nbytes = MIN(writecount, 4);
if (nbytes < 4 )
{
if (ahbap_write_buf_u8(swjdp, buffer, nbytes, address) != ERROR_OK)
{
LOG_WARNING("Block read error address 0x%x, count 0x%x", address, count);
return ERROR_JTAG_DEVICE_ERROR;
}
address += nbytes;
}
else
{
outvalue = *((u32*)buffer);
for (i = 0; i < nbytes; i++ )
{
*((u8*)buffer + (address & 0x3)) = outvalue;
outvalue >>= 8;
address++;
}
outvalue = *((u32*)buffer);
ahbap_write_reg_u32(swjdp, AHBAP_DRW, outvalue);
if (swjdp_transaction_endcheck(swjdp) != ERROR_OK)
{
LOG_WARNING("Block read error address 0x%x, count 0x%x", address, count);
return ERROR_JTAG_DEVICE_ERROR;
}
}
buffer += nbytes;
writecount -= nbytes;
} while (writecount);
wcount -= blocksize;
}
return retval;
}
int ahbap_write_buf_u8(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
{
u32 outvalue;
int retval = ERROR_OK;
if (count >= 4)
return ahbap_write_buf_packed_u8(swjdp, buffer, count, address);
swjdp->trans_mode = TRANS_MODE_COMPOSITE;
while (count > 0)
{
ahbap_setup_accessport(swjdp, CSW_8BIT | CSW_ADDRINC_SINGLE, address);
outvalue = *((u8*)buffer) << 8 * (address & 0x3);
ahbap_write_reg_u32(swjdp, AHBAP_DRW, outvalue );
retval = swjdp_transaction_endcheck(swjdp);
count--;
address++;
buffer++;
}
return retval;
}
/*********************************************************************************
* *
* ahbap_read_buf_u32(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address) *
* *
* Read block fast in target order (little endian) into a buffer *
* *
**********************************************************************************/
int ahbap_read_buf_u32(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
{
int wcount, blocksize, readcount, errorcount = 0, retval = ERROR_OK;
u32 adr = address;
u8* pBuffer = buffer;
swjdp->trans_mode = TRANS_MODE_COMPOSITE;
count >>= 2;
wcount = count;
while (wcount > 0)
{
/* Adjust to read within 4K block boundaries */
blocksize = (0x1000 - (0xFFF & address)) >> 2;
if (wcount < blocksize)
blocksize = wcount;
/* handle unaligned data at 4k boundary */
if (blocksize == 0)
blocksize = 1;
ahbap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_SINGLE, address);
/* Scan out first read */
swjdp_scan(swjdp->jtag_info, SWJDP_IR_APACC, AHBAP_DRW, DPAP_READ, 0, NULL, NULL);
for (readcount = 0; readcount < blocksize - 1; readcount++)
{
/* Scan out read instruction and scan in previous value */
swjdp_scan(swjdp->jtag_info, SWJDP_IR_APACC, AHBAP_DRW, DPAP_READ, 0, buffer + 4 * readcount, &swjdp->ack);
}
/* Scan in last value */
swjdp_scan(swjdp->jtag_info, SWJDP_IR_DPACC, DP_RDBUFF, DPAP_READ, 0, buffer + 4 * readcount, &swjdp->ack);
if (swjdp_transaction_endcheck(swjdp) == ERROR_OK)
{
wcount = wcount - blocksize;
address += 4 * blocksize;
buffer += 4 * blocksize;
}
else
{
errorcount++;
}
if (errorcount > 1)
{
LOG_WARNING("Block read error address 0x%x, count 0x%x", address, count);
return ERROR_JTAG_DEVICE_ERROR;
}
}
/* if we have an unaligned access - reorder data */
if (adr & 0x3u)
{
for (readcount = 0; readcount < count; readcount++)
{
int i;
u32 data = *((u32*)pBuffer);
for (i = 0; i < 4; i++ )
{
*((u8*)pBuffer) = (data >> 8 * (adr & 0x3));
pBuffer++;
adr++;
}
}
}
return retval;
}
int ahbap_read_buf_packed_u16(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
{
u32 invalue;
int retval = ERROR_OK;
int wcount, blocksize, readcount, i;
swjdp->trans_mode = TRANS_MODE_COMPOSITE;
wcount = count >> 1;
while (wcount > 0)
{
int nbytes;
/* Adjust to read within 4K block boundaries */
blocksize = (0x1000 - (0xFFF & address)) >> 1;
if (wcount < blocksize)
blocksize = wcount;
ahbap_setup_accessport(swjdp, CSW_16BIT | CSW_ADDRINC_PACKED, address);
/* handle unaligned data at 4k boundary */
if (blocksize == 0)
blocksize = 1;
readcount = blocksize;
do
{
ahbap_read_reg_u32(swjdp, AHBAP_DRW, &invalue );
if (swjdp_transaction_endcheck(swjdp) != ERROR_OK)
{
LOG_WARNING("Block read error address 0x%x, count 0x%x", address, count);
return ERROR_JTAG_DEVICE_ERROR;
}
nbytes = MIN((readcount << 1), 4);
for (i = 0; i < nbytes; i++ )
{
*((u8*)buffer) = (invalue >> 8 * (address & 0x3));
buffer++;
address++;
}
readcount -= (nbytes >> 1);
} while (readcount);
wcount -= blocksize;
}
return retval;
}
int ahbap_read_buf_u16(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
{
u32 invalue, i;
int retval = ERROR_OK;
if (count >= 4)
return ahbap_read_buf_packed_u16(swjdp, buffer, count, address);
swjdp->trans_mode = TRANS_MODE_COMPOSITE;
while (count > 0)
{
ahbap_setup_accessport(swjdp, CSW_16BIT | CSW_ADDRINC_SINGLE, address);
ahbap_read_reg_u32(swjdp, AHBAP_DRW, &invalue );
retval = swjdp_transaction_endcheck(swjdp);
if (address & 0x1)
{
for (i = 0; i < 2; i++ )
{
*((u8*)buffer) = (invalue >> 8 * (address & 0x3));
buffer++;
address++;
}
}
else
{
*((u16*)buffer) = (invalue >> 8 * (address & 0x3));
address += 2;
buffer += 2;
}
count -= 2;
}
return retval;
}
int ahbap_read_buf_packed_u8(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
{
u32 invalue;
int retval = ERROR_OK;
int wcount, blocksize, readcount, i;
swjdp->trans_mode = TRANS_MODE_COMPOSITE;
wcount = count;
while (wcount > 0)
{
int nbytes;
/* Adjust to read within 4K block boundaries */
blocksize = (0x1000 - (0xFFF & address));
if (wcount < blocksize)
blocksize = wcount;
ahbap_setup_accessport(swjdp, CSW_8BIT | CSW_ADDRINC_PACKED, address);
readcount = blocksize;
do
{
ahbap_read_reg_u32(swjdp, AHBAP_DRW, &invalue );
if (swjdp_transaction_endcheck(swjdp) != ERROR_OK)
{
LOG_WARNING("Block read error address 0x%x, count 0x%x", address, count);
return ERROR_JTAG_DEVICE_ERROR;
}
nbytes = MIN(readcount, 4);
for (i = 0; i < nbytes; i++ )
{
*((u8*)buffer) = (invalue >> 8 * (address & 0x3));
buffer++;
address++;
}
readcount -= nbytes;
} while (readcount);
wcount -= blocksize;
}
return retval;
}
int ahbap_read_buf_u8(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
{
u32 invalue;
int retval = ERROR_OK;
if (count >= 4)
return ahbap_read_buf_packed_u8(swjdp, buffer, count, address);
swjdp->trans_mode = TRANS_MODE_COMPOSITE;
while (count > 0)
{
ahbap_setup_accessport(swjdp, CSW_8BIT | CSW_ADDRINC_SINGLE, address);
ahbap_read_reg_u32(swjdp, AHBAP_DRW, &invalue );
retval = swjdp_transaction_endcheck(swjdp);
*((u8*)buffer) = (invalue >> 8 * (address & 0x3));
count--;
address++;
buffer++;
}
return retval;
}
int ahbap_read_coreregister_u32(swjdp_common_t *swjdp, u32 *value, int regnum)
{
int retval;
u32 dcrdr;
/* because the DCB_DCRDR is used for the emulated dcc channel
* we gave to save/restore the DCB_DCRDR when used */
ahbap_read_system_atomic_u32(swjdp, DCB_DCRDR, &dcrdr);
swjdp->trans_mode = TRANS_MODE_COMPOSITE;
/* ahbap_write_system_u32(swjdp, DCB_DCRSR, regnum); */
ahbap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRSR & 0xFFFFFFF0);
ahbap_write_reg_u32(swjdp, AHBAP_BD0 | (DCB_DCRSR & 0xC), regnum );
/* ahbap_read_system_u32(swjdp, DCB_DCRDR, value); */
ahbap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRDR & 0xFFFFFFF0);
ahbap_read_reg_u32(swjdp, AHBAP_BD0 | (DCB_DCRDR & 0xC), value );
retval = swjdp_transaction_endcheck(swjdp);
ahbap_write_system_atomic_u32(swjdp, DCB_DCRDR, dcrdr);
return retval;
}
int ahbap_write_coreregister_u32(swjdp_common_t *swjdp, u32 value, int regnum)
{
int retval;
u32 dcrdr;
/* because the DCB_DCRDR is used for the emulated dcc channel
* we gave to save/restore the DCB_DCRDR when used */
ahbap_read_system_atomic_u32(swjdp, DCB_DCRDR, &dcrdr);
swjdp->trans_mode = TRANS_MODE_COMPOSITE;
/* ahbap_write_system_u32(swjdp, DCB_DCRDR, core_regs[i]); */
ahbap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRDR & 0xFFFFFFF0);
ahbap_write_reg_u32(swjdp, AHBAP_BD0 | (DCB_DCRDR & 0xC), value );
/* ahbap_write_system_u32(swjdp, DCB_DCRSR, i | DCRSR_WnR ); */
ahbap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRSR & 0xFFFFFFF0);
ahbap_write_reg_u32(swjdp, AHBAP_BD0 | (DCB_DCRSR & 0xC), regnum | DCRSR_WnR );
retval = swjdp_transaction_endcheck(swjdp);
ahbap_write_system_atomic_u32(swjdp, DCB_DCRDR, dcrdr);
return retval;
}
int ahbap_debugport_init(swjdp_common_t *swjdp)
{
u32 idreg, romaddr, dummy;
u32 ctrlstat;
int cnt = 0;
int retval;
LOG_DEBUG(" ");
swjdp->ap_csw_value = -1;
swjdp->ap_tar_value = -1;
swjdp->trans_mode = TRANS_MODE_ATOMIC;
swjdp_read_dpacc(swjdp, &dummy, DP_CTRL_STAT);
swjdp_write_dpacc(swjdp, SSTICKYERR, DP_CTRL_STAT);
swjdp_read_dpacc(swjdp, &dummy, DP_CTRL_STAT);
swjdp->dp_ctrl_stat = CDBGPWRUPREQ | CSYSPWRUPREQ;
swjdp_write_dpacc(swjdp, swjdp->dp_ctrl_stat, DP_CTRL_STAT);
swjdp_read_dpacc(swjdp, &ctrlstat, DP_CTRL_STAT);
if ((retval=jtag_execute_queue())!=ERROR_OK)
return retval;
/* Check that we have debug power domains activated */
while (!(ctrlstat & CDBGPWRUPACK) && (cnt++ < 10))
{
LOG_DEBUG("swjdp: wait CDBGPWRUPACK");
swjdp_read_dpacc(swjdp, &ctrlstat, DP_CTRL_STAT);
if ((retval=jtag_execute_queue())!=ERROR_OK)
return retval;
alive_sleep(10);
}
while (!(ctrlstat & CSYSPWRUPACK) && (cnt++ < 10))
{
LOG_DEBUG("swjdp: wait CSYSPWRUPACK");
swjdp_read_dpacc(swjdp, &ctrlstat, DP_CTRL_STAT);
if ((retval=jtag_execute_queue())!=ERROR_OK)
return retval;
alive_sleep(10);
}
swjdp_read_dpacc(swjdp, &dummy, DP_CTRL_STAT);
/* With debug power on we can activate OVERRUN checking */
swjdp->dp_ctrl_stat = CDBGPWRUPREQ | CSYSPWRUPREQ | CORUNDETECT;
swjdp_write_dpacc(swjdp, swjdp->dp_ctrl_stat, DP_CTRL_STAT);
swjdp_read_dpacc(swjdp, &dummy, DP_CTRL_STAT);
ahbap_read_reg_u32(swjdp, 0xFC, &idreg);
ahbap_read_reg_u32(swjdp, 0xF8, &romaddr);
LOG_DEBUG("AHB-AP ID Register 0x%x, Debug ROM Address 0x%x", idreg, romaddr);
return ERROR_OK;
}
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