mips: optimize write code for speed
All the writes are done by the new function mips32_pracc_write_mem_generic(). The code is similar to the read generic code. The reuse of register 15 as memory base address saves 3 pracc accesses. The first write takes 13(12) pracc accesses and for additional writes 3(2). Loading miniprograms should take 25% less time and loading fastdata transfer handler code should be over 2x faster. Change-Id: Ia3b24ba084af33be99da19f00a7fd4d1b291f350 Signed-off-by: Salvador Arroyo <sarroyofdez@yahoo.es> Reviewed-on: http://openocd.zylin.com/956 Tested-by: jenkins Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
This commit is contained in:
Salvador Arroyo
Spencer Oliver
parent
83f3f2c4c7
commit
f3e01106d9
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@ -93,18 +93,6 @@ struct mips32_pracc_context {
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struct mips_ejtag *ejtag_info;
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};
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static int mips32_pracc_read_u32(struct mips_ejtag *ejtag_info,
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uint32_t addr, uint32_t *buf);
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static int mips32_pracc_write_mem8(struct mips_ejtag *ejtag_info,
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uint32_t addr, int count, uint8_t *buf);
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static int mips32_pracc_write_mem16(struct mips_ejtag *ejtag_info,
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uint32_t addr, int count, uint16_t *buf);
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static int mips32_pracc_write_mem32(struct mips_ejtag *ejtag_info,
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uint32_t addr, int count, uint32_t *buf);
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static int mips32_pracc_write_u32(struct mips_ejtag *ejtag_info,
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uint32_t addr, uint32_t *buf);
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static int mips32_pracc_sync_cache(struct mips_ejtag *ejtag_info,
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uint32_t start_addr, uint32_t end_addr);
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static int mips32_pracc_clean_invalidate_cache(struct mips_ejtag *ejtag_info,
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@ -286,6 +274,26 @@ int mips32_pracc_exec(struct mips_ejtag *ejtag_info, int code_len, const uint32_
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return ERROR_OK;
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}
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static int mips32_pracc_read_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf)
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{
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uint32_t code[] = {
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/* start: */
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MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
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MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR), /* $15 = MIPS32_PRACC_BASE_ADDR */
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MIPS32_SW(8, PRACC_STACK_OFFSET, 15), /* sw $8,PRACC_STACK_OFFSET($15) */
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MIPS32_LUI(8, UPPER16((addr + 0x8000))), /* load $8 with modified upper address */
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MIPS32_LW(8, LOWER16(addr), 8), /* lw $8, LOWER16(addr)($8) */
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MIPS32_SW(8, PRACC_OUT_OFFSET, 15), /* sw $8,PRACC_OUT_OFFSET($15) */
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MIPS32_LW(8, PRACC_STACK_OFFSET, 15), /* lw $8,PRACC_STACK_OFFSET($15) */
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MIPS32_B(NEG16(8)), /* b start */
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MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
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};
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return mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 0, NULL, 1, buf, 1);
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}
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int mips32_pracc_read_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
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{
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if (count == 1 && size == 4)
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@ -387,26 +395,6 @@ exit:
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return retval;
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}
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static int mips32_pracc_read_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf)
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{
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uint32_t code[] = {
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/* start: */
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MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
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MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR), /* $15 = MIPS32_PRACC_BASE_ADDR */
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MIPS32_SW(8, PRACC_STACK_OFFSET, 15), /* sw $8,PRACC_STACK_OFFSET($15) */
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MIPS32_LUI(8, UPPER16((addr + 0x8000))), /* load $8 with modified upper address */
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MIPS32_LW(8, LOWER16(addr), 8), /* lw $8, LOWER16(addr)($8) */
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MIPS32_SW(8, PRACC_OUT_OFFSET, 15), /* sw $8,PRACC_OUT_OFFSET($15) */
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MIPS32_LW(8, PRACC_STACK_OFFSET, 15), /* lw $8,PRACC_STACK_OFFSET($15) */
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MIPS32_B(NEG16(8)), /* b start */
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MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
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};
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return mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 0, NULL, 1, buf, 1);
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}
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int mips32_cp0_read(struct mips_ejtag *ejtag_info, uint32_t *val, uint32_t cp0_reg, uint32_t cp0_sel)
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{
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/**
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@ -619,27 +607,101 @@ static int mips32_pracc_clean_invalidate_cache(struct mips_ejtag *ejtag_info,
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return retval;
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}
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static int mips32_pracc_write_mem_generic(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
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{
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uint32_t *code;
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code = malloc((128 * 3 + 9) * sizeof(uint32_t)); /* alloc memory for the worst case */
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if (code == NULL) {
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LOG_ERROR("Out of memory");
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return ERROR_FAIL;
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}
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uint32_t *buf32 = buf;
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uint16_t *buf16 = buf;
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uint8_t *buf8 = buf;
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int i;
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int retval = ERROR_FAIL;
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uint32_t *code_p;
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uint32_t upper_base_addr, last_upper_base_addr;
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int this_round_count;
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int code_len;
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while (count) {
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this_round_count = (count > 128) ? 128 : count;
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last_upper_base_addr = UPPER16((addr + 0x8000));
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code_p = code;
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*code_p++ = MIPS32_MTC0(15, 31, 0); /* save $15 in DeSave */
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*code_p++ = MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR); /* $15 = MIPS32_PRACC_BASE_ADDR */
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*code_p++ = MIPS32_SW(8, PRACC_STACK_OFFSET, 15); /* save $8 to pracc stack */
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*code_p++ = MIPS32_LUI(15, last_upper_base_addr); /* reuse $15 as memory base address */
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code_len = 4;
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for (i = 0; i != this_round_count; i++) {
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upper_base_addr = UPPER16((addr + 0x8000));
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if (last_upper_base_addr != upper_base_addr) {
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*code_p++ = MIPS32_LUI(15, upper_base_addr); /* if needed, change upper address in $15*/
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code_len++;
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last_upper_base_addr = upper_base_addr;
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}
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if (size == 4) { /* for word write check if one half word is 0 and load it accordingly */
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if (LOWER16(*buf32) == 0) {
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*code_p++ = MIPS32_LUI(8, UPPER16(*buf32)); /* load only upper value */
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code_len++;
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} else if (UPPER16(*buf32) == 0) {
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*code_p++ = MIPS32_ORI(8, 0, LOWER16(*buf32)); /* load only lower value */
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code_len++;
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} else {
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*code_p++ = MIPS32_LUI(8, UPPER16(*buf32)); /* load upper and lower */
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*code_p++ = MIPS32_ORI(8, 8, LOWER16(*buf32));
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code_len += 2;
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}
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*code_p++ = MIPS32_SW(8, LOWER16(addr), 15); /* store word to memory */
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code_len++;
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buf32++;
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} else if (size == 2) {
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*code_p++ = MIPS32_ORI(8, 0, *buf16); /* load lower value */
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*code_p++ = MIPS32_SH(8, LOWER16(addr), 15); /* store half word to memory */
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code_len += 2;
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buf16++;
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} else {
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*code_p++ = MIPS32_ORI(8, 0, *buf8); /* load lower value */
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*code_p++ = MIPS32_SB(8, LOWER16(addr), 15); /* store byte to memory */
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code_len += 2;
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buf8++;
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}
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addr += size;
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}
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*code_p++ = MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR); /* $15 = MIPS32_PRACC_BASE_ADDR */
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*code_p++ = MIPS32_LW(8, PRACC_STACK_OFFSET, 15); /* restore $8 from pracc stack */
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code_len += 4;
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*code_p++ = MIPS32_B(NEG16(code_len - 1)); /* jump to start */
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*code_p = MIPS32_MFC0(15, 31, 0); /* restore $15 from DeSave */
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retval = mips32_pracc_exec(ejtag_info, code_len, code, 0, NULL, 0, NULL, 1);
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if (retval != ERROR_OK)
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goto exit;
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count -= this_round_count;
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}
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exit:
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free(code);
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return retval;
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}
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int mips32_pracc_write_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
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{
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int retval;
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switch (size) {
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case 1:
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retval = mips32_pracc_write_mem8(ejtag_info, addr, count, (uint8_t *)buf);
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break;
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case 2:
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retval = mips32_pracc_write_mem16(ejtag_info, addr, count, (uint16_t *)buf);
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break;
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case 4:
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if (count == 1)
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retval = mips32_pracc_write_u32(ejtag_info, addr, (uint32_t *)buf);
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else
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retval = mips32_pracc_write_mem32(ejtag_info, addr, count, (uint32_t *)buf);
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break;
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default:
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retval = ERROR_FAIL;
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}
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int retval = mips32_pracc_write_mem_generic(ejtag_info, addr, size, count, buf);
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if (retval != ERROR_OK)
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return retval;
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/**
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* If we are in the cachable regoion and cache is activated,
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@ -703,200 +765,6 @@ int mips32_pracc_write_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int siz
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return retval;
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}
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static int mips32_pracc_write_mem32(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint32_t *buf)
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{
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static const uint32_t code[] = {
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/* start: */
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MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
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MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
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MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK)),
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MIPS32_SW(8, 0, 15), /* sw $8,($15) */
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MIPS32_SW(9, 0, 15), /* sw $9,($15) */
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MIPS32_SW(10, 0, 15), /* sw $10,($15) */
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MIPS32_SW(11, 0, 15), /* sw $11,($15) */
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MIPS32_ADDI(8, 15, NEG16(MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN)), /* $8= MIPS32_PRACC_PARAM_IN */
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MIPS32_LW(9, 0, 8), /* Load write addr to $9 */
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MIPS32_LW(10, 4, 8), /* Load write count to $10 */
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MIPS32_ADDI(8, 8, 8), /* $8 += 8 beginning of data */
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/* loop: */
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MIPS32_LW(11, 0, 8), /* lw $11,0($8), Load $11 with the word @mem[$8] */
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MIPS32_SW(11, 0, 9), /* sw $11,0($9) */
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MIPS32_ADDI(9, 9, 4), /* $9 += 4 */
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MIPS32_BNE(10, 9, NEG16(4)), /* bne $10, $9, loop */
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MIPS32_ADDI(8, 8, 4), /* $8 += 4 */
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/* end: */
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MIPS32_LW(11, 0, 15), /* lw $11,($15) */
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MIPS32_LW(10, 0, 15), /* lw $10,($15) */
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MIPS32_LW(9, 0, 15), /* lw $9,($15) */
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MIPS32_LW(8, 0, 15), /* lw $8,($15) */
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MIPS32_B(NEG16(21)), /* b start */
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MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
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};
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/* TODO remove array */
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uint32_t *param_in = malloc((count + 2) * sizeof(uint32_t));
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param_in[0] = addr;
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param_in[1] = addr + (count * sizeof(uint32_t)); /* last address */
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memcpy(¶m_in[2], buf, count * sizeof(uint32_t));
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int retval;
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retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
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count + 2, param_in, 0, NULL, 1);
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free(param_in);
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return retval;
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}
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static int mips32_pracc_write_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf)
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{
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static const uint32_t code[] = {
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/* start: */
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MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
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MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
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MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK)),
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MIPS32_SW(8, 0, 15), /* sw $8,($15) */
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MIPS32_SW(9, 0, 15), /* sw $9,($15) */
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MIPS32_LW(8, NEG16((MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN)-4), 15), /* load R8 @ param_in[1] = data */
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MIPS32_LW(9, NEG16(MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN), 15), /* load R9 @ param_in[0] = address */
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MIPS32_SW(8, 0, 9), /* sw $8,0($9) */
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MIPS32_LW(9, 0, 15), /* lw $9,($15) */
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MIPS32_LW(8, 0, 15), /* lw $8,($15) */
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MIPS32_B(NEG16(11)), /* b start */
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MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
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};
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/* TODO remove array */
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uint32_t param_in[1 + 1];
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param_in[0] = addr;
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param_in[1] = *buf;
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return mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
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ARRAY_SIZE(param_in), param_in, 0, NULL, 1);
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}
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static int mips32_pracc_write_mem16(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint16_t *buf)
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{
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static const uint32_t code[] = {
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/* start: */
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MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
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MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
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MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK)),
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MIPS32_SW(8, 0, 15), /* sw $8,($15) */
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MIPS32_SW(9, 0, 15), /* sw $9,($15) */
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MIPS32_SW(10, 0, 15), /* sw $10,($15) */
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MIPS32_SW(11, 0, 15), /* sw $11,($15) */
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MIPS32_LUI(8, UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */
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MIPS32_ORI(8, 8, LOWER16(MIPS32_PRACC_PARAM_IN)),
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MIPS32_LW(9, 0, 8), /* Load write addr to $9 */
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MIPS32_LW(10, 4, 8), /* Load write count to $10 */
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MIPS32_ADDI(8, 8, 8), /* $8 += 8 */
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/* loop: */
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MIPS32_BEQ(0, 10, 8), /* beq $0, $10, end */
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MIPS32_NOP,
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MIPS32_LW(11, 0, 8), /* lw $11,0($8), Load $11 with the word @mem[$8] */
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MIPS32_SH(11, 0, 9), /* sh $11,0($9) */
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MIPS32_ADDI(10, 10, NEG16(1)), /* $10-- */
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MIPS32_ADDI(9, 9, 2), /* $9 += 2 */
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MIPS32_ADDI(8, 8, 4), /* $8 += 4 */
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MIPS32_B(NEG16(8)), /* b loop */
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MIPS32_NOP,
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/* end: */
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MIPS32_LW(11, 0, 15), /* lw $11,($15) */
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MIPS32_LW(10, 0, 15), /* lw $10,($15) */
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MIPS32_LW(9, 0, 15), /* lw $9,($15) */
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MIPS32_LW(8, 0, 15), /* lw $8,($15) */
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MIPS32_B(NEG16(26)), /* b start */
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MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
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};
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/* TODO remove array */
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uint32_t *param_in = malloc((count + 2) * sizeof(uint32_t));
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int i;
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param_in[0] = addr;
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param_in[1] = count;
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for (i = 0; i < count; i++)
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param_in[i + 2] = buf[i];
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int retval;
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retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
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count + 2, param_in, 0, NULL, 1);
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free(param_in);
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return retval;
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}
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static int mips32_pracc_write_mem8(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint8_t *buf)
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{
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static const uint32_t code[] = {
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/* start: */
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MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
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MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
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MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK)),
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MIPS32_SW(8, 0, 15), /* sw $8,($15) */
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MIPS32_SW(9, 0, 15), /* sw $9,($15) */
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MIPS32_SW(10, 0, 15), /* sw $10,($15) */
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MIPS32_SW(11, 0, 15), /* sw $11,($15) */
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MIPS32_LUI(8, UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */
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MIPS32_ORI(8, 8, LOWER16(MIPS32_PRACC_PARAM_IN)),
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MIPS32_LW(9, 0, 8), /* Load write addr to $9 */
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MIPS32_LW(10, 4, 8), /* Load write count to $10 */
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MIPS32_ADDI(8, 8, 8), /* $8 += 8 */
|
||||
/* loop: */
|
||||
MIPS32_BEQ(0, 10, 8), /* beq $0, $10, end */
|
||||
MIPS32_NOP,
|
||||
|
||||
MIPS32_LW(11, 0, 8), /* lw $11,0($8), Load $11 with the word @mem[$8] */
|
||||
MIPS32_SB(11, 0, 9), /* sb $11,0($9) */
|
||||
|
||||
MIPS32_ADDI(10, 10, NEG16(1)), /* $10-- */
|
||||
MIPS32_ADDI(9, 9, 1), /* $9 += 1 */
|
||||
MIPS32_ADDI(8, 8, 4), /* $8 += 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(26)), /* b start */
|
||||
MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
|
||||
};
|
||||
|
||||
/* TODO remove array */
|
||||
uint32_t *param_in = malloc((count + 2) * sizeof(uint32_t));
|
||||
int retval;
|
||||
int i;
|
||||
param_in[0] = addr;
|
||||
param_in[1] = count;
|
||||
|
||||
for (i = 0; i < count; i++)
|
||||
param_in[i + 2] = buf[i];
|
||||
|
||||
retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
|
||||
count + 2, param_in, 0, NULL, 1);
|
||||
|
||||
free(param_in);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
int mips32_pracc_write_regs(struct mips_ejtag *ejtag_info, uint32_t *regs)
|
||||
{
|
||||
static const uint32_t code[] = {
|
||||
|
|
@ -1105,7 +973,7 @@ int mips32_pracc_fastdata_xfer(struct mips_ejtag *ejtag_info, struct working_are
|
|||
|
||||
/* 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);
|
||||
mips32_pracc_write_mem_generic(ejtag_info, source->address, 4, ARRAY_SIZE(handler_code), handler_code);
|
||||
/* save previous operation to speed to any consecutive read/writes */
|
||||
ejtag_info->fast_access_save = write_t;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue