flash: add stellaris async flash loader
This enable the Stellaris flash driver to use the asynchronous algorithm support. Speed increase is as follows: before - wrote 65536 bytes from file test.bin in 5.486040s (11.666 KiB/s) after - wrote 65536 bytes from file test.bin in 2.274001s (28.144 KiB/s) Change-Id: I9004c9aadffa1ae3b0cbf908e6549b5b1f794508 Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk> Reviewed-on: http://openocd.zylin.com/403 Tested-by: jenkins Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
This commit is contained in:
Spencer Oliver
Andreas Fritiofson
parent
bee7184ce4
commit
90cee35696
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@ -26,41 +26,53 @@
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.cpu cortex-m3
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.thumb
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.thumb_func
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.align 2
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/*
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Call with :
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r0 = buffer address
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r1 = destination address
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r2 = bytecount (in) - endaddr (work)
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Used registers:
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r3 = pFLASH_CTRL_BASE
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r4 = FLASHWRITECMD
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r5 = #1
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r6 = bytes written
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r7 = temp reg
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*/
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* Params :
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* r0 = workarea start
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* r1 = workarea end
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* r2 = target address
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* r3 = count (32bit words)
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*
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* Clobbered:
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* r4 = pFLASH_CTRL_BASE
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* r5 = FLASHWRITECMD
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* r7 - rp
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* r8 - wp, tmp
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*/
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write:
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ldr r3,pFLASH_CTRL_BASE
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ldr r4,FLASHWRITECMD
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movs r5, 1
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movs r6, #0
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ldr r4, pFLASH_CTRL_BASE
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ldr r5, FLASHWRITECMD
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wait_fifo:
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ldr r8, [r0, #0] /* read wp */
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cmp r8, #0 /* abort if wp == 0 */
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beq exit
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ldr r7, [r0, #4] /* read rp */
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cmp r7, r8 /* wait until rp != wp */
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beq wait_fifo
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mainloop:
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str r1, [r3, #0]
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ldr r7, [r0, r6]
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str r7, [r3, #4]
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str r4, [r3, #8]
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waitloop:
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ldr r7, [r3, #8]
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tst r7, r5
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bne waitloop
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adds r1, r1, #4
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adds r6, r6, #4
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cmp r6, r2
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bne mainloop
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bkpt #0
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str r2, [r4, #0] /* FMA - write address */
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add r2, r2, #4 /* increment target address */
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ldr r8, [r7], #4
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str r8, [r4, #4] /* FMD - write data */
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str r5, [r4, #8] /* FMC - enable write */
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busy:
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ldr r8, [r4, #8]
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tst r8, #1
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bne busy
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cmp r7, r1 /* wrap rp at end of buffer */
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it cs
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addcs r7, r0, #8 /* skip loader args */
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str r7, [r0, #4] /* store rp */
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subs r3, r3, #1 /* decrement word count */
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cbz r3, exit /* loop if not done */
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b wait_fifo
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exit:
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bkpt #0
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pFLASH_CTRL_BASE: .word 0x400FD000
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FLASHWRITECMD: .word 0xA4420001
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@ -958,43 +958,41 @@ static int stellaris_protect(struct flash_bank *bank, int set, int first, int la
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/* see contib/loaders/flash/stellaris.s for src */
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static const uint8_t stellaris_write_code[] = {
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/*
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Call with :
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r0 = buffer address
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r1 = destination address
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r2 = bytecount (in) - endaddr (work)
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/* write: */
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0xDF, 0xF8, 0x40, 0x40, /* ldr r4, pFLASH_CTRL_BASE */
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0xDF, 0xF8, 0x40, 0x50, /* ldr r5, FLASHWRITECMD */
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/* wait_fifo: */
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0xD0, 0xF8, 0x00, 0x80, /* ldr r8, [r0, #0] */
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0xB8, 0xF1, 0x00, 0x0F, /* cmp r8, #0 */
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0x17, 0xD0, /* beq exit */
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0x47, 0x68, /* ldr r7, [r0, #4] */
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0x47, 0x45, /* cmp r7, r8 */
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0xF7, 0xD0, /* beq wait_fifo */
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/* mainloop: */
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0x22, 0x60, /* str r2, [r4, #0] */
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0x02, 0xF1, 0x04, 0x02, /* add r2, r2, #4 */
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0x57, 0xF8, 0x04, 0x8B, /* ldr r8, [r7], #4 */
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0xC4, 0xF8, 0x04, 0x80, /* str r8, [r4, #4] */
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0xA5, 0x60, /* str r5, [r4, #8] */
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/* busy: */
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0xD4, 0xF8, 0x08, 0x80, /* ldr r8, [r4, #8] */
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0x18, 0xF0, 0x01, 0x0F, /* tst r8, #1 */
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0xFA, 0xD1, /* bne busy */
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0x8F, 0x42, /* cmp r7, r1 */
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0x28, 0xBF, /* it cs */
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0x00, 0xF1, 0x08, 0x07, /* addcs r7, r0, #8 */
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0x47, 0x60, /* str r7, [r0, #4] */
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0x01, 0x3B, /* subs r3, r3, #1 */
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0x03, 0xB1, /* cbz r3, exit */
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0xE2, 0xE7, /* b wait_fifo */
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/* exit: */
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0x00, 0xBE, /* bkpt #0 */
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Used registers:
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r3 = pFLASH_CTRL_BASE
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r4 = FLASHWRITECMD
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r5 = #1
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r6 = bytes written
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r7 = temp reg
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*/
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0x07, 0x4B, /* ldr r3,pFLASH_CTRL_BASE */
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0x08, 0x4C, /* ldr r4,FLASHWRITECMD */
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0x01, 0x25, /* movs r5, 1 */
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0x00, 0x26, /* movs r6, #0 */
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/* mainloop: */
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0x19, 0x60, /* str r1, [r3, #0] */
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0x87, 0x59, /* ldr r7, [r0, r6] */
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0x5F, 0x60, /* str r7, [r3, #4] */
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0x9C, 0x60, /* str r4, [r3, #8] */
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/* waitloop: */
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0x9F, 0x68, /* ldr r7, [r3, #8] */
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0x2F, 0x42, /* tst r7, r5 */
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0xFC, 0xD1, /* bne waitloop */
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0x04, 0x31, /* adds r1, r1, #4 */
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0x04, 0x36, /* adds r6, r6, #4 */
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0x96, 0x42, /* cmp r6, r2 */
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0xF4, 0xD1, /* bne mainloop */
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0x00, 0xBE, /* bkpt #0 */
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/* pFLASH_CTRL_BASE: */
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/* pFLASH_CTRL_BASE: */
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0x00, 0xD0, 0x0F, 0x40, /* .word 0x400FD000 */
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/* FLASHWRITECMD: */
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/* FLASHWRITECMD: */
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0x01, 0x00, 0x42, 0xA4 /* .word 0xA4420001 */
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};
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static int stellaris_write_block(struct flash_bank *bank,
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uint8_t *buffer, uint32_t offset, uint32_t wcount)
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{
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@ -1003,7 +1001,7 @@ static int stellaris_write_block(struct flash_bank *bank,
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struct working_area *source;
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struct working_area *write_algorithm;
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uint32_t address = bank->base + offset;
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struct reg_param reg_params[3];
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struct reg_param reg_params[4];
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struct armv7m_algorithm armv7m_info;
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int retval = ERROR_OK;
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@ -1032,7 +1030,8 @@ static int stellaris_write_block(struct flash_bank *bank,
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while (target_alloc_working_area_try(target, buffer_size, &source) != ERROR_OK) {
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buffer_size /= 2;
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if (buffer_size <= buf_min) {
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target_free_working_area(target, write_algorithm);
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if (write_algorithm)
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target_free_working_area(target, write_algorithm);
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return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
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}
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LOG_DEBUG("retry target_alloc_working_area(%s, size=%u)",
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@ -1049,39 +1048,22 @@ static int stellaris_write_block(struct flash_bank *bank,
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init_reg_param(®_params[0], "r0", 32, PARAM_OUT);
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init_reg_param(®_params[1], "r1", 32, PARAM_OUT);
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init_reg_param(®_params[2], "r2", 32, PARAM_OUT);
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init_reg_param(®_params[3], "r3", 32, PARAM_OUT);
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while (wcount > 0) {
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uint32_t thisrun_count = (wcount > (buffer_size / 4)) ? (buffer_size / 4) : wcount;
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buf_set_u32(reg_params[0].value, 0, 32, source->address);
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buf_set_u32(reg_params[1].value, 0, 32, source->address + source->size);
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buf_set_u32(reg_params[2].value, 0, 32, address);
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buf_set_u32(reg_params[3].value, 0, 32, wcount);
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target_write_buffer(target, source->address, thisrun_count * 4, buffer);
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retval = target_run_flash_async_algorithm(target, buffer, wcount, 4,
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0, NULL,
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4, reg_params,
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source->address, source->size,
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write_algorithm->address, 0,
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&armv7m_info);
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buf_set_u32(reg_params[0].value, 0, 32, source->address);
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buf_set_u32(reg_params[1].value, 0, 32, address);
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buf_set_u32(reg_params[2].value, 0, 32, 4*thisrun_count);
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LOG_DEBUG("Algorithm flash write %u words to 0x%" PRIx32
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", %u remaining",
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(unsigned) thisrun_count, address,
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(unsigned) (wcount - thisrun_count));
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retval = target_run_algorithm(target, 0, NULL, 3, reg_params,
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write_algorithm->address,
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0,
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10000, &armv7m_info);
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if (retval != ERROR_OK) {
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LOG_ERROR("error %d executing stellaris "
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"flash write algorithm",
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retval);
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retval = ERROR_FLASH_OPERATION_FAILED;
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break;
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}
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buffer += thisrun_count * 4;
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address += thisrun_count * 4;
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wcount -= thisrun_count;
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}
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/* REVISIT we could speed up writing multi-section images by
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* not freeing the initialized write_algorithm this way.
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*/
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if (retval == ERROR_FLASH_OPERATION_FAILED)
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LOG_ERROR("error %d executing stellaris flash write algorithm", retval);
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target_free_working_area(target, write_algorithm);
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target_free_working_area(target, source);
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@ -1089,6 +1071,7 @@ static int stellaris_write_block(struct flash_bank *bank,
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destroy_reg_param(®_params[0]);
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destroy_reg_param(®_params[1]);
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destroy_reg_param(®_params[2]);
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destroy_reg_param(®_params[3]);
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return retval;
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}
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