int mips32_pracc_read_mem16(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint16_t *buf) { static const uint32_t code[] = { /* start: */ MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), MIPS32_SW(8,0,15), /* sw $8,($15) */ MIPS32_SW(9,0,15), /* sw $9,($15) */ MIPS32_SW(10,0,15), /* sw $10,($15) */ MIPS32_SW(11,0,15), /* sw $11,($15) */ MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */ MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)), MIPS32_LW(9,0,8), /* $9 = mem[$8]; read addr */ MIPS32_LW(10,4,8), /* $10 = mem[$8 + 4]; read count */ MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $11 = MIPS32_PRACC_PARAM_OUT */ MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)), /* loop: */ MIPS32_BEQ(0,10,8), /* beq 0, $10, end */ MIPS32_NOP, MIPS32_LHU(8,0,9), /* lw $8,0($9), Load $8 with the halfword @mem[$9] */ MIPS32_SW(8,0,11), /* sw $8,0($11) */ MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ MIPS32_ADDI(9,9,2), /* $9 += 2 */ MIPS32_ADDI(11,11,4), /* $11 += 4 */ MIPS32_B(NEG16(8)), /* b loop */ MIPS32_NOP, /* end: */ MIPS32_LW(11,0,15), /* lw $11,($15) */ MIPS32_LW(10,0,15), /* lw $10,($15) */ MIPS32_LW(9,0,15), /* lw $9,($15) */ MIPS32_LW(8,0,15), /* lw $8,($15) */ MIPS32_B(NEG16(27)), /* b start */ MIPS32_MFC0(15,30,0), /* move COP0 DeSave to $15 */ }; /* TODO remove array */ uint32_t *param_out = malloc(count * sizeof(uint32_t)); int i; // int retval; int blocksize; int bytesread; uint32_t param_in[2]; bytesread = 0; //while (count > 0) { blocksize = count; if (count > 0x400) blocksize = 0x400; param_in[0] = addr; param_in[1] = blocksize; mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, \ ARRAY_SIZE(param_in), param_in, count, param_out, 1); // count -= blocksize; // addr += blocksize; // bytesread += blocksize; } for (i = 0; i < count; i++) { buf[i] = param_out[i]; } free(param_out); return ERROR_OK; }
/* fastdata upload/download requires an initialized working area * to load the download code; it should not be called otherwise * fetch order from the fastdata area * 1. start addr * 2. end addr * 3. data ... */ int mips32_pracc_fastdata_xfer(struct mips_ejtag *ejtag_info, struct working_area *source, int write_t, uint32_t addr, int count, uint32_t *buf) { uint32_t handler_code[] = { /* caution when editing, table is modified below */ /* r15 points to the start of this code */ MIPS32_SW(8,MIPS32_FASTDATA_HANDLER_SIZE - 4,15), MIPS32_SW(9,MIPS32_FASTDATA_HANDLER_SIZE - 8,15), MIPS32_SW(10,MIPS32_FASTDATA_HANDLER_SIZE - 12,15), MIPS32_SW(11,MIPS32_FASTDATA_HANDLER_SIZE - 16,15), /* start of fastdata area in t0 */ MIPS32_LUI(8,UPPER16(MIPS32_PRACC_FASTDATA_AREA)), MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_FASTDATA_AREA)), MIPS32_LW(9,0,8), /* start addr in t1 */ MIPS32_LW(10,0,8), /* end addr to t2 */ /* loop: */ /* 8 */ MIPS32_LW(11,0,0), /* lw t3,[t8 | r9] */ /* 9 */ MIPS32_SW(11,0,0), /* sw t3,[r9 | r8] */ MIPS32_BNE(10,9,NEG16(3)), /* bne $t2,t1,loop */ MIPS32_ADDI(9,9,4), /* addi t1,t1,4 */ MIPS32_LW(8,MIPS32_FASTDATA_HANDLER_SIZE - 4,15), MIPS32_LW(9,MIPS32_FASTDATA_HANDLER_SIZE - 8,15), MIPS32_LW(10,MIPS32_FASTDATA_HANDLER_SIZE - 12,15), MIPS32_LW(11,MIPS32_FASTDATA_HANDLER_SIZE - 16,15), MIPS32_LUI(15,UPPER16(MIPS32_PRACC_TEXT)), MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_TEXT)), MIPS32_JR(15), /* jr start */ MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ }; uint32_t jmp_code[] = { MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ /* 1 */ MIPS32_LUI(15,0), /* addr of working area added below */ /* 2 */ MIPS32_ORI(15,15,0), /* addr of working area added below */ MIPS32_JR(15), /* jump to ram program */ MIPS32_NOP, }; int retval, i; uint32_t val, ejtag_ctrl, address; if (source->size < MIPS32_FASTDATA_HANDLER_SIZE) return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; if (write_t) { handler_code[8] = MIPS32_LW(11,0,8); /* load data from probe at fastdata area */ handler_code[9] = MIPS32_SW(11,0,9); /* store data to RAM @ r9 */ } else { handler_code[8] = MIPS32_LW(11,0,9); /* load data from RAM @ r9 */ handler_code[9] = MIPS32_SW(11,0,8); /* store data to probe at fastdata area */ } /* write program into RAM */ if (write_t != ejtag_info->fast_access_save) { mips32_pracc_write_mem32(ejtag_info, source->address, ARRAY_SIZE(handler_code), handler_code); /* save previous operation to speed to any consecutive read/writes */ ejtag_info->fast_access_save = write_t; } LOG_DEBUG("%s using 0x%.8" PRIx32 " for write handler", __func__, source->address); jmp_code[1] |= UPPER16(source->address); jmp_code[2] |= LOWER16(source->address); for (i = 0; i < (int) ARRAY_SIZE(jmp_code); i++) { if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK) return retval; mips_ejtag_set_instr(ejtag_info, EJTAG_INST_DATA); mips_ejtag_drscan_32_out(ejtag_info, jmp_code[i]); /* Clear the access pending bit (let the processor eat!) */ ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC; mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL); mips_ejtag_drscan_32_out(ejtag_info, ejtag_ctrl); } if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK) return retval; /* next fetch to dmseg should be in FASTDATA_AREA, check */ address = 0; mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS); retval = mips_ejtag_drscan_32(ejtag_info, &address); if (retval != ERROR_OK) return retval; if (address != MIPS32_PRACC_FASTDATA_AREA) return ERROR_FAIL; /* wait PrAcc pending bit for FASTDATA write */ if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK) return retval; /* Send the load start address */ val = addr; mips_ejtag_set_instr(ejtag_info, EJTAG_INST_FASTDATA); mips_ejtag_fastdata_scan(ejtag_info, 1, &val); /* Send the load end address */ val = addr + (count - 1) * 4; mips_ejtag_fastdata_scan(ejtag_info, 1, &val); for (i = 0; i < count; i++) { if ((retval = mips_ejtag_fastdata_scan(ejtag_info, write_t, buf++)) != ERROR_OK) return retval; } if ((retval = jtag_execute_queue()) != ERROR_OK) { LOG_ERROR("fastdata load failed"); return retval; } if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK) return retval; address = 0; mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS); retval = mips_ejtag_drscan_32(ejtag_info, &address); if (retval != ERROR_OK) return retval; if (address != MIPS32_PRACC_TEXT) LOG_ERROR("mini program did not return to start"); return retval; }
int mips32_pracc_read_mem32(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint32_t *buf) { static const uint32_t code[] = { /* start: */ MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), MIPS32_SW(8,0,15), /* sw $8,($15) */ MIPS32_SW(9,0,15), /* sw $9,($15) */ MIPS32_SW(10,0,15), /* sw $10,($15) */ MIPS32_SW(11,0,15), /* sw $11,($15) */ MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */ MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)), MIPS32_LW(9,0,8), /* $9 = mem[$8]; read addr */ MIPS32_LW(10,4,8), /* $10 = mem[$8 + 4]; read count */ MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $11 = MIPS32_PRACC_PARAM_OUT */ MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)), /* loop: */ MIPS32_BEQ(0,10,8), /* beq 0, $10, end */ MIPS32_NOP, MIPS32_LW(8,0,9), /* lw $8,0($9), Load $8 with the word @mem[$9] */ MIPS32_SW(8,0,11), /* sw $8,0($11) */ MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ MIPS32_ADDI(9,9,4), /* $1 += 4 */ MIPS32_ADDI(11,11,4), /* $11 += 4 */ MIPS32_B(NEG16(8)), /* b loop */ MIPS32_NOP, /* end: */ MIPS32_LW(11,0,15), /* lw $11,($15) */ MIPS32_LW(10,0,15), /* lw $10,($15) */ MIPS32_LW(9,0,15), /* lw $9,($15) */ MIPS32_LW(8,0,15), /* lw $8,($15) */ MIPS32_B(NEG16(27)), /* b start */ MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ }; int retval = ERROR_OK; int blocksize; int bytesread; uint32_t param_in[2]; bytesread = 0; while (count > 0) { blocksize = count; if (count > 0x400) blocksize = 0x400; param_in[0] = addr; param_in[1] = blocksize; if ((retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, ARRAY_SIZE(param_in), param_in, blocksize, &buf[bytesread], 1)) != ERROR_OK) { return retval; } count -= blocksize; addr += blocksize; bytesread += blocksize; } return retval; }
int mips32_pracc_read_regs(struct mips_ejtag *ejtag_info, uint32_t *regs) { static const uint32_t code[] = { /* start: */ MIPS32_MTC0(2,31,0), /* move $2 to COP0 DeSave */ MIPS32_LUI(2,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $2 = MIPS32_PRACC_PARAM_OUT */ MIPS32_ORI(2,2,LOWER16(MIPS32_PRACC_PARAM_OUT)), MIPS32_SW(0,0*4,2), /* sw $0,0*4($2) */ MIPS32_SW(1,1*4,2), /* sw $1,1*4($2) */ MIPS32_SW(15,15*4,2), /* sw $15,15*4($2) */ MIPS32_MFC0(2,31,0), /* move COP0 DeSave to $2 */ MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), MIPS32_SW(1,0,15), /* sw $1,($15) */ MIPS32_SW(2,0,15), /* sw $2,($15) */ MIPS32_LUI(1,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $1 = MIPS32_PRACC_PARAM_OUT */ MIPS32_ORI(1,1,LOWER16(MIPS32_PRACC_PARAM_OUT)), MIPS32_SW(2,2*4,1), /* sw $2,2*4($1) */ MIPS32_SW(3,3*4,1), /* sw $3,3*4($1) */ MIPS32_SW(4,4*4,1), /* sw $4,4*4($1) */ MIPS32_SW(5,5*4,1), /* sw $5,5*4($1) */ MIPS32_SW(6,6*4,1), /* sw $6,6*4($1) */ MIPS32_SW(7,7*4,1), /* sw $7,7*4($1) */ MIPS32_SW(8,8*4,1), /* sw $8,8*4($1) */ MIPS32_SW(9,9*4,1), /* sw $9,9*4($1) */ MIPS32_SW(10,10*4,1), /* sw $10,10*4($1) */ MIPS32_SW(11,11*4,1), /* sw $11,11*4($1) */ MIPS32_SW(12,12*4,1), /* sw $12,12*4($1) */ MIPS32_SW(13,13*4,1), /* sw $13,13*4($1) */ MIPS32_SW(14,14*4,1), /* sw $14,14*4($1) */ MIPS32_SW(16,16*4,1), /* sw $16,16*4($1) */ MIPS32_SW(17,17*4,1), /* sw $17,17*4($1) */ MIPS32_SW(18,18*4,1), /* sw $18,18*4($1) */ MIPS32_SW(19,19*4,1), /* sw $19,19*4($1) */ MIPS32_SW(20,20*4,1), /* sw $20,20*4($1) */ MIPS32_SW(21,21*4,1), /* sw $21,21*4($1) */ MIPS32_SW(22,22*4,1), /* sw $22,22*4($1) */ MIPS32_SW(23,23*4,1), /* sw $23,23*4($1) */ MIPS32_SW(24,24*4,1), /* sw $24,24*4($1) */ MIPS32_SW(25,25*4,1), /* sw $25,25*4($1) */ MIPS32_SW(26,26*4,1), /* sw $26,26*4($1) */ MIPS32_SW(27,27*4,1), /* sw $27,27*4($1) */ MIPS32_SW(28,28*4,1), /* sw $28,28*4($1) */ MIPS32_SW(29,29*4,1), /* sw $29,29*4($1) */ MIPS32_SW(30,30*4,1), /* sw $30,30*4($1) */ MIPS32_SW(31,31*4,1), /* sw $31,31*4($1) */ MIPS32_MFC0(2,12,0), /* move status to $2 */ MIPS32_SW(2,32*4,1), /* sw $2,32*4($1) */ MIPS32_MFLO(2), /* move lo to $2 */ MIPS32_SW(2,33*4,1), /* sw $2,33*4($1) */ MIPS32_MFHI(2), /* move hi to $2 */ MIPS32_SW(2,34*4,1), /* sw $2,34*4($1) */ MIPS32_MFC0(2,8,0), /* move badvaddr to $2 */ MIPS32_SW(2,35*4,1), /* sw $2,35*4($1) */ MIPS32_MFC0(2,13,0), /* move cause to $2 */ MIPS32_SW(2,36*4,1), /* sw $2,36*4($1) */ MIPS32_MFC0(2,24,0), /* move depc (pc) to $2 */ MIPS32_SW(2,37*4,1), /* sw $2,37*4($1) */ MIPS32_LW(2,0,15), /* lw $2,($15) */ MIPS32_LW(1,0,15), /* lw $1,($15) */ MIPS32_B(NEG16(58)), /* b start */ MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ }; int retval; retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 0, NULL, MIPS32NUMCOREREGS, regs, 1); return retval; }