From b8d8953ae9995829a61ce7b34e544f004bb23c55 Mon Sep 17 00:00:00 2001 From: Spencer Oliver Date: Wed, 13 Jan 2010 10:12:34 +0000 Subject: MIPS: add mips algorithm support - add mips support for target algorithms. - added handlers for target_checksum_memory and target_blank_check_memory. - clean up long lines Signed-off-by: Spencer Oliver --- src/target/mips32.c | 315 +++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 312 insertions(+), 3 deletions(-) (limited to 'src/target/mips32.c') diff --git a/src/target/mips32.c b/src/target/mips32.c index 5bb4104e..b0cb79cc 100644 --- a/src/target/mips32.c +++ b/src/target/mips32.c @@ -27,6 +27,8 @@ #endif #include "mips32.h" +#include "breakpoints.h" +#include "algorithm.h" #include "register.h" char* mips32_core_reg_list[] = @@ -319,9 +321,168 @@ int mips32_init_arch_info(struct target *target, struct mips32_common *mips32, s return ERROR_OK; } -int mips32_run_algorithm(struct target *target, int num_mem_params, struct mem_param *mem_params, int num_reg_params, struct reg_param *reg_params, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info) +/* run to exit point. return error if exit point was not reached. */ +static int mips32_run_and_wait(struct target *target, uint32_t entry_point, + int timeout_ms, uint32_t exit_point, struct mips32_common *mips32) { - /*TODO*/ + uint32_t pc; + int retval; + /* This code relies on the target specific resume() and poll()->debug_entry() + * sequence to write register values to the processor and the read them back */ + if ((retval = target_resume(target, 0, entry_point, 0, 1)) != ERROR_OK) + { + return retval; + } + + retval = target_wait_state(target, TARGET_HALTED, timeout_ms); + /* If the target fails to halt due to the breakpoint, force a halt */ + if (retval != ERROR_OK || target->state != TARGET_HALTED) + { + if ((retval = target_halt(target)) != ERROR_OK) + return retval; + if ((retval = target_wait_state(target, TARGET_HALTED, 500)) != ERROR_OK) + { + return retval; + } + return ERROR_TARGET_TIMEOUT; + } + + pc = buf_get_u32(mips32->core_cache->reg_list[MIPS32_PC].value, 0, 32); + if (pc != exit_point) + { + LOG_DEBUG("failed algoritm halted at 0x%" PRIx32 " ", pc); + return ERROR_TARGET_TIMEOUT; + } + + return ERROR_OK; +} + +int mips32_run_algorithm(struct target *target, int num_mem_params, + struct mem_param *mem_params, int num_reg_params, + struct reg_param *reg_params, uint32_t entry_point, + uint32_t exit_point, int timeout_ms, void *arch_info) +{ + struct mips32_common *mips32 = target_to_mips32(target); + struct mips32_algorithm *mips32_algorithm_info = arch_info; + enum mips32_isa_mode isa_mode = mips32->isa_mode; + + uint32_t context[MIPS32NUMCOREREGS]; + int i; + int retval = ERROR_OK; + + LOG_DEBUG("Running algorithm"); + + /* NOTE: mips32_run_algorithm requires that each algorithm uses a software breakpoint + * at the exit point */ + + if (mips32->common_magic != MIPS32_COMMON_MAGIC) + { + LOG_ERROR("current target isn't a MIPS32 target"); + return ERROR_TARGET_INVALID; + } + + if (target->state != TARGET_HALTED) + { + LOG_WARNING("target not halted"); + return ERROR_TARGET_NOT_HALTED; + } + + /* refresh core register cache */ + for (unsigned i = 0; i < MIPS32NUMCOREREGS; i++) + { + if (!mips32->core_cache->reg_list[i].valid) + mips32->read_core_reg(target, i); + context[i] = buf_get_u32(mips32->core_cache->reg_list[i].value, 0, 32); + } + + for (i = 0; i < num_mem_params; i++) + { + if ((retval = target_write_buffer(target, mem_params[i].address, + mem_params[i].size, mem_params[i].value)) != ERROR_OK) + { + return retval; + } + } + + for (int i = 0; i < num_reg_params; i++) + { + struct reg *reg = register_get_by_name(mips32->core_cache, reg_params[i].reg_name, 0); + + if (!reg) + { + LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name); + return ERROR_INVALID_ARGUMENTS; + } + + if (reg->size != reg_params[i].size) + { + LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", + reg_params[i].reg_name); + return ERROR_INVALID_ARGUMENTS; + } + + mips32_set_core_reg(reg, reg_params[i].value); + } + + mips32->isa_mode = mips32_algorithm_info->isa_mode; + + retval = mips32_run_and_wait(target, entry_point, timeout_ms, exit_point, mips32); + + if (retval != ERROR_OK) + return retval; + + for (i = 0; i < num_mem_params; i++) + { + if (mem_params[i].direction != PARAM_OUT) + { + if ((retval = target_read_buffer(target, mem_params[i].address, mem_params[i].size, + mem_params[i].value)) != ERROR_OK) + { + return retval; + } + } + } + + for (i = 0; i < num_reg_params; i++) + { + if (reg_params[i].direction != PARAM_OUT) + { + struct reg *reg = register_get_by_name(mips32->core_cache, reg_params[i].reg_name, 0); + if (!reg) + { + LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name); + return ERROR_INVALID_ARGUMENTS; + } + + if (reg->size != reg_params[i].size) + { + LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", + reg_params[i].reg_name); + return ERROR_INVALID_ARGUMENTS; + } + + buf_set_u32(reg_params[i].value, 0, 32, buf_get_u32(reg->value, 0, 32)); + } + } + + /* restore everything we saved before */ + for (i = 0; i < MIPS32NUMCOREREGS; i++) + { + uint32_t regvalue; + regvalue = buf_get_u32(mips32->core_cache->reg_list[i].value, 0, 32); + if (regvalue != context[i]) + { + LOG_DEBUG("restoring register %s with value 0x%8.8" PRIx32, + mips32->core_cache->reg_list[i].name, context[i]); + buf_set_u32(mips32->core_cache->reg_list[i].value, + 0, 32, context[i]); + mips32->core_cache->reg_list[i].valid = 1; + mips32->core_cache->reg_list[i].dirty = 1; + } + } + + mips32->isa_mode = isa_mode; + return ERROR_OK; } @@ -397,7 +558,8 @@ int mips32_configure_break_unit(struct target *target) return retval; } - LOG_DEBUG("DCR 0x%" PRIx32 " numinst %i numdata %i", dcr, mips32->num_inst_bpoints, mips32->num_data_bpoints); + LOG_DEBUG("DCR 0x%" PRIx32 " numinst %i numdata %i", dcr, mips32->num_inst_bpoints, + mips32->num_data_bpoints); mips32->bp_scanned = 1; @@ -441,3 +603,150 @@ int mips32_enable_interrupts(struct target *target, int enable) return ERROR_OK; } + +int mips32_checksum_memory(struct target *target, uint32_t address, + uint32_t count, uint32_t* checksum) +{ + struct working_area *crc_algorithm; + struct reg_param reg_params[2]; + struct mips32_algorithm mips32_info; + int retval; + uint32_t i; + + static const uint32_t mips_crc_code[] = + { + 0x248C0000, /* addiu $t4, $a0, 0 */ + 0x24AA0000, /* addiu $t2, $a1, 0 */ + 0x2404FFFF, /* addiu $a0, $zero, 0xffffffff */ + 0x10000010, /* beq $zero, $zero, ncomp */ + 0x240B0000, /* addiu $t3, $zero, 0 */ + /* nbyte: */ + 0x81850000, /* lb $a1, ($t4) */ + 0x218C0001, /* addi $t4, $t4, 1 */ + 0x00052E00, /* sll $a1, $a1, 24 */ + 0x3C0204C1, /* lui $v0, 0x04c1 */ + 0x00852026, /* xor $a0, $a0, $a1 */ + 0x34471DB7, /* ori $a3, $v0, 0x1db7 */ + 0x00003021, /* addu $a2, $zero, $zero */ + /* loop: */ + 0x00044040, /* sll $t0, $a0, 1 */ + 0x24C60001, /* addiu $a2, $a2, 1 */ + 0x28840000, /* slti $a0, $a0, 0 */ + 0x01074826, /* xor $t1, $t0, $a3 */ + 0x0124400B, /* movn $t0, $t1, $a0 */ + 0x28C30008, /* slti $v1, $a2, 8 */ + 0x1460FFF9, /* bne $v1, $zero, loop */ + 0x01002021, /* addu $a0, $t0, $zero */ + /* ncomp: */ + 0x154BFFF0, /* bne $t2, $t3, nbyte */ + 0x256B0001, /* addiu $t3, $t3, 1 */ + 0x7000003F, /* sdbbp */ + }; + + /* make sure we have a working area */ + if (target_alloc_working_area(target, sizeof(mips_crc_code), &crc_algorithm) != ERROR_OK) + { + return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; + } + + /* convert flash writing code into a buffer in target endianness */ + for (i = 0; i < ARRAY_SIZE(mips_crc_code); i++) + target_write_u32(target, crc_algorithm->address + i*sizeof(uint32_t), mips_crc_code[i]); + + mips32_info.common_magic = MIPS32_COMMON_MAGIC; + mips32_info.isa_mode = MIPS32_ISA_MIPS32; + + init_reg_param(®_params[0], "a0", 32, PARAM_IN_OUT); + buf_set_u32(reg_params[0].value, 0, 32, address); + + init_reg_param(®_params[1], "a1", 32, PARAM_OUT); + buf_set_u32(reg_params[1].value, 0, 32, count); + + if ((retval = target_run_algorithm(target, 0, NULL, 2, reg_params, + crc_algorithm->address, crc_algorithm->address + (sizeof(mips_crc_code)-4), 10000, + &mips32_info)) != ERROR_OK) + { + destroy_reg_param(®_params[0]); + destroy_reg_param(®_params[1]); + target_free_working_area(target, crc_algorithm); + return 0; + } + + *checksum = buf_get_u32(reg_params[0].value, 0, 32); + + destroy_reg_param(®_params[0]); + destroy_reg_param(®_params[1]); + + target_free_working_area(target, crc_algorithm); + + return ERROR_OK; +} + +/** Checks whether a memory region is zeroed. */ +int mips32_blank_check_memory(struct target *target, + uint32_t address, uint32_t count, uint32_t* blank) +{ + struct working_area *erase_check_algorithm; + struct reg_param reg_params[3]; + struct mips32_algorithm mips32_info; + int retval; + uint32_t i; + + static const uint32_t erase_check_code[] = + { + /* nbyte: */ + 0x80880000, /* lb $t0, ($a0) */ + 0x00C83024, /* and $a2, $a2, $t0 */ + 0x24A5FFFF, /* addiu $a1, $a1, -1 */ + 0x14A0FFFC, /* bne $a1, $zero, nbyte */ + 0x24840001, /* addiu $a0, $a0, 1 */ + 0x7000003F /* sdbbp */ + }; + + /* make sure we have a working area */ + if (target_alloc_working_area(target, sizeof(erase_check_code), &erase_check_algorithm) != ERROR_OK) + { + return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; + } + + /* convert flash writing code into a buffer in target endianness */ + for (i = 0; i < ARRAY_SIZE(erase_check_code); i++) + { + target_write_u32(target, erase_check_algorithm->address + i*sizeof(uint32_t), + erase_check_code[i]); + } + + mips32_info.common_magic = MIPS32_COMMON_MAGIC; + mips32_info.isa_mode = MIPS32_ISA_MIPS32; + + init_reg_param(®_params[0], "a0", 32, PARAM_OUT); + buf_set_u32(reg_params[0].value, 0, 32, address); + + init_reg_param(®_params[1], "a1", 32, PARAM_OUT); + buf_set_u32(reg_params[1].value, 0, 32, count); + + init_reg_param(®_params[2], "a2", 32, PARAM_IN_OUT); + buf_set_u32(reg_params[2].value, 0, 32, 0xff); + + if ((retval = target_run_algorithm(target, 0, NULL, 3, reg_params, + erase_check_algorithm->address, + erase_check_algorithm->address + (sizeof(erase_check_code)-2), + 10000, &mips32_info)) != ERROR_OK) + { + destroy_reg_param(®_params[0]); + destroy_reg_param(®_params[1]); + destroy_reg_param(®_params[2]); + target_free_working_area(target, erase_check_algorithm); + return 0; + } + + *blank = buf_get_u32(reg_params[2].value, 0, 32); + + destroy_reg_param(®_params[0]); + destroy_reg_param(®_params[1]); + destroy_reg_param(®_params[2]); + + target_free_working_area(target, erase_check_algorithm); + + return ERROR_OK; +} -- cgit v1.2.3