diff options
Diffstat (limited to 'src/flash/flash.c')
| -rw-r--r-- | src/flash/flash.c | 264 |
1 files changed, 234 insertions, 30 deletions
diff --git a/src/flash/flash.c b/src/flash/flash.c index d5159b97..96077258 100644 --- a/src/flash/flash.c +++ b/src/flash/flash.c @@ -28,6 +28,10 @@ #include "fileio.h" #include "image.h" #include "log.h" +#include "armv4_5.h" +#include "algorithm.h" +#include "binarybuffer.h" +#include "armv7m.h" #include <string.h> #include <unistd.h> @@ -336,22 +340,12 @@ int handle_flash_info_command(struct command_context_s *cmd_ctx, char *cmd, char /* attempt auto probe */ if ((retval = p->driver->auto_probe(p)) != ERROR_OK) return retval; - - if ((retval = p->driver->erase_check(p)) != ERROR_OK) - return retval; command_print(cmd_ctx, "#%i: %s at 0x%8.8x, size 0x%8.8x, buswidth %i, chipwidth %i", i, p->driver->name, p->base, p->size, p->bus_width, p->chip_width); for (j = 0; j < p->num_sectors; j++) { - char *erase_state, *protect_state; - - if (p->sectors[j].is_erased == 0) - erase_state = "not erased"; - else if (p->sectors[j].is_erased == 1) - erase_state = "erased"; - else - erase_state = "erase state unknown"; + char *protect_state; if (p->sectors[j].is_protected == 0) protect_state = "not protected"; @@ -360,9 +354,9 @@ int handle_flash_info_command(struct command_context_s *cmd_ctx, char *cmd, char else protect_state = "protection state unknown"; - command_print(cmd_ctx, "\t#%i: 0x%8.8x (0x%x %ikB) %s, %s", + command_print(cmd_ctx, "\t#%i: 0x%8.8x (0x%x %ikB) %s", j, p->sectors[j].offset, p->sectors[j].size, p->sectors[j].size>>10, - erase_state, protect_state); + protect_state); } *buf = '\0'; /* initialize buffer, otherwise it migh contain garbage if driver function fails */ @@ -425,6 +419,7 @@ int handle_flash_erase_check_command(struct command_context_s *cmd_ctx, char *cm p = get_flash_bank_by_num(strtoul(args[0], NULL, 0)); if (p) { + int j; if ((retval = p->driver->erase_check(p)) == ERROR_OK) { command_print(cmd_ctx, "successfully checked erase state", p->driver->name, p->base); @@ -434,6 +429,23 @@ int handle_flash_erase_check_command(struct command_context_s *cmd_ctx, char *cm command_print(cmd_ctx, "unknown error when checking erase state of flash bank #%s at 0x%8.8x", args[0], p->base); } + + for (j = 0; j < p->num_sectors; j++) + { + char *erase_state; + + if (p->sectors[j].is_erased == 0) + erase_state = "not erased"; + else if (p->sectors[j].is_erased == 1) + erase_state = "erased"; + else + erase_state = "erase state unknown"; + + command_print(cmd_ctx, "\t#%i: 0x%8.8x (0x%x %ikB) %s", + j, p->sectors[j].offset, p->sectors[j].size, p->sectors[j].size>>10, + erase_state); + } + } return ERROR_OK; @@ -1068,32 +1080,224 @@ int default_flash_blank_check(struct flash_bank_s *bank) return ERROR_TARGET_NOT_HALTED; } + int retval; + int fast_check=0; + working_area_t *erase_check_algorithm; +#if 0 + /* FIX! doesn't work yet... */ + /* + char test(char *a, int len, char t) + { + int i=0; + + for (i=0; i<len; i++) + { + t&=a[i]; + + } + } + + $ arm-elf-gcc -c -mthumb -O3 test.c + + $ arm-elf-objdump --disassemble test.o - for (i = 0; i < bank->num_sectors; i++) + test.o: file format elf32-littlearm + + Disassembly of section .text: + + 00000000 <test>: + 0: b510 push {r4, lr} + 2: 0612 lsl r2, r2, #24 + 4: 1c04 mov r4, r0 (add r4, r0, #0) + 6: 0e10 lsr r0, r2, #24 + 8: 2200 mov r2, #0 + a: 2900 cmp r1, #0 + c: dd04 ble 18 <test+0x18> + e: 5ca3 ldrb r3, [r4, r2] + 10: 3201 add r2, #1 + 12: 4018 and r0, r3 + 14: 428a cmp r2, r1 + 16: dbfa blt e <test+0xe> + 18: bd10 pop {r4, pc} + 1a: 46c0 nop (mov r8, r8) + + + */ + u16 erase_check_code[] = { - int j; - bank->sectors[i].is_erased = 1; + 0x0612,// lsl r2, r2, #24 + 0x1c04,// mov r4, r0 (add r4, r0, #0) + 0x0e10,// lsr r0, r2, #24 + 0x2200,// mov r2, #0 + 0x2900,// cmp r1, #0 + 0xdd04,// ble 18 <test+0x18> + 0x5ca3,// ldrb r3, [r4, r2] + 0x3201,// add r2, #1 + 0x4018,// and r0, r3 + 0x428a,// cmp r2, r1 + 0xdbfa,// blt e <test+0xe> + 0x46c0,// nop (mov r8, r8) + + }; + + + + /* make sure we have a working area */ + if (target_alloc_working_area(target, ((sizeof(erase_check_code)+3)/4)*4, &erase_check_algorithm) != ERROR_OK) + { + erase_check_algorithm = NULL; + } + + if (erase_check_algorithm) + { + u8 erase_check_code_buf[((sizeof(erase_check_code)+3)/4)*4]; + LOG_DEBUG("Running fast flash erase check"); - for (j=0; j<bank->sectors[i].size; j+=buffer_size) + for (i = 0; i < sizeof(erase_check_code)/sizeof(*erase_check_code); i++) + target_buffer_set_u16(target, erase_check_code_buf + (i*2), erase_check_code[i]); + + /* write algorithm code to working area */ + if ((retval=target->type->write_memory(target, erase_check_algorithm->address, 2, sizeof(erase_check_code)/sizeof(*erase_check_code), erase_check_code_buf))==ERROR_OK) { - int chunk; - int retval; - chunk=buffer_size; - if (chunk>(j-bank->sectors[i].size)) + for (i = 0; i < bank->num_sectors; i++) { - chunk=(j-bank->sectors[i].size); + u32 address = bank->base + bank->sectors[i].offset; + u32 size = bank->sectors[i].size; + + reg_param_t reg_params[3]; + armv7m_algorithm_t arm_info; + + arm_info.common_magic = ARMV7M_COMMON_MAGIC; + arm_info.core_mode = ARMV7M_MODE_ANY; + arm_info.core_state = ARMV7M_STATE_THUMB; + + init_reg_param(®_params[0], "r0", 32, PARAM_OUT); + buf_set_u32(reg_params[0].value, 0, 32, address); + + init_reg_param(®_params[1], "r1", 32, PARAM_OUT); + buf_set_u32(reg_params[1].value, 0, 32, size); + + init_reg_param(®_params[2], "r2", 32, PARAM_IN_OUT); + buf_set_u32(reg_params[2].value, 0, 32, 0xff); + + if ((retval = target->type->run_algorithm(target, 0, NULL, 3, reg_params, erase_check_algorithm->address, + erase_check_algorithm->address + sizeof(erase_check_code) - 2, 10000, &arm_info)) != ERROR_OK) + break; + + if (buf_get_u32(reg_params[2].value, 0, 32) == 0xff) + bank->sectors[i].is_erased = 1; + else + bank->sectors[i].is_erased = 0; + + destroy_reg_param(®_params[0]); + destroy_reg_param(®_params[1]); + destroy_reg_param(®_params[2]); + } + if (i == bank->num_sectors) + { + fast_check = 1; } + } + target_free_working_area(target, erase_check_algorithm); + } +#endif + if (!fast_check) + { + /* try ARM7 instead */ + + u32 erase_check_code[] = + { + 0xe4d03001, /* ldrb r3, [r0], #1 */ + 0xe0022003, /* and r2, r2, r3 */ + 0xe2511001, /* subs r1, r1, #1 */ + 0x1afffffb, /* b -4 */ + 0xeafffffe /* b 0 */ + }; + + /* make sure we have a working area */ + if (target_alloc_working_area(target, 20, &erase_check_algorithm) == ERROR_OK) + { + u8 erase_check_code_buf[5 * 4]; + + for (i = 0; i < 5; i++) + target_buffer_set_u32(target, erase_check_code_buf + (i*4), erase_check_code[i]); + + /* write algorithm code to working area */ + if ((retval=target->type->write_memory(target, erase_check_algorithm->address, 4, 5, erase_check_code_buf))==ERROR_OK) + { + for (i = 0; i < bank->num_sectors; i++) + { + u32 address = bank->base + bank->sectors[i].offset; + u32 size = bank->sectors[i].size; - retval=target->type->read_memory(target, bank->base + bank->sectors[i].offset, 4, chunk/4, buffer); - if (retval!=ERROR_OK) - return retval; - - for (nBytes = 0; nBytes < chunk; nBytes++) + reg_param_t reg_params[3]; + armv4_5_algorithm_t armv4_5_info; + + armv4_5_info.common_magic = ARMV4_5_COMMON_MAGIC; + armv4_5_info.core_mode = ARMV4_5_MODE_SVC; + armv4_5_info.core_state = ARMV4_5_STATE_ARM; + + init_reg_param(®_params[0], "r0", 32, PARAM_OUT); + buf_set_u32(reg_params[0].value, 0, 32, address); + + init_reg_param(®_params[1], "r1", 32, PARAM_OUT); + buf_set_u32(reg_params[1].value, 0, 32, size); + + init_reg_param(®_params[2], "r2", 32, PARAM_IN_OUT); + buf_set_u32(reg_params[2].value, 0, 32, 0xff); + + if ((retval = target->type->run_algorithm(target, 0, NULL, 3, reg_params, + erase_check_algorithm->address, erase_check_algorithm->address + 0x10, 10000, &armv4_5_info)) != ERROR_OK) + break; + + if (buf_get_u32(reg_params[2].value, 0, 32) == 0xff) + bank->sectors[i].is_erased = 1; + else + bank->sectors[i].is_erased = 0; + + destroy_reg_param(®_params[0]); + destroy_reg_param(®_params[1]); + destroy_reg_param(®_params[2]); + } + if (i == bank->num_sectors) + { + fast_check = 1; + } + } + target_free_working_area(target, erase_check_algorithm); + } + } + + + if (!fast_check) + { + LOG_USER("Running slow fallback erase check - add working memory"); + for (i = 0; i < bank->num_sectors; i++) + { + int j; + bank->sectors[i].is_erased = 1; + + for (j=0; j<bank->sectors[i].size; j+=buffer_size) { - if (buffer[nBytes] != 0xFF) + int chunk; + int retval; + chunk=buffer_size; + if (chunk>(j-bank->sectors[i].size)) { - bank->sectors[i].is_erased = 0; - break; + chunk=(j-bank->sectors[i].size); + } + + retval=target->type->read_memory(target, bank->base + bank->sectors[i].offset + j, 4, chunk/4, buffer); + if (retval!=ERROR_OK) + return retval; + + for (nBytes = 0; nBytes < chunk; nBytes++) + { + if (buffer[nBytes] != 0xFF) + { + bank->sectors[i].is_erased = 0; + break; + } } } } |