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author | Antonio Borneo <borneo.antonio@gmail.com> | 2021-07-25 17:31:53 +0200 |
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committer | Antonio Borneo <borneo.antonio@gmail.com> | 2021-11-05 22:41:53 +0000 |
commit | da15f9f8c29064f0124e60ac0ac21ddd11fdcc2c (patch) | |
tree | 8ab08d8015a09688c23401a928e7c211f2e885a3 /src | |
parent | 7920110665630c8fdc42277ed17f6849597ea63e (diff) | |
download | riscv-openocd-da15f9f8c29064f0124e60ac0ac21ddd11fdcc2c.zip riscv-openocd-da15f9f8c29064f0124e60ac0ac21ddd11fdcc2c.tar.gz riscv-openocd-da15f9f8c29064f0124e60ac0ac21ddd11fdcc2c.tar.bz2 |
stlink: collapse consecutive mem AP r/w in a single command
Detect a sequence of memory AP operations that can be issued as a
single stlink command.
This improves the data throughput during memory transfer.
Change-Id: Ifa4488513346fc7cd0c9317b7d24ef510ccfd959
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/6604
Tested-by: jenkins
Reviewed-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>
Diffstat (limited to 'src')
-rw-r--r-- | src/jtag/drivers/stlink_usb.c | 136 |
1 files changed, 94 insertions, 42 deletions
diff --git a/src/jtag/drivers/stlink_usb.c b/src/jtag/drivers/stlink_usb.c index 1cd68c5..818fccd 100644 --- a/src/jtag/drivers/stlink_usb.c +++ b/src/jtag/drivers/stlink_usb.c @@ -4132,6 +4132,95 @@ static int stlink_dap_op_queue_ap_abort(struct adiv5_dap *dap, uint8_t *ack) return ERROR_OK; } +static int stlink_usb_buf_rw_segment(void *handle, const struct dap_queue *q, unsigned int count) +{ + uint32_t bufsize = count * CMD_MEM_AP_2_SIZE(q[0].cmd); + uint8_t buf[bufsize]; + uint8_t ap_num = q[0].mem_ap.ap->ap_num; + uint32_t addr = q[0].mem_ap.addr; + uint32_t csw = q[0].mem_ap.csw; + + int retval = stlink_dap_open_ap(ap_num); + if (retval != ERROR_OK) + return retval; + + switch (q[0].cmd) { + case CMD_MEM_AP_WRITE8: + for (unsigned int i = 0; i < count; i++) + buf[i] = q[i].mem_ap.data >> 8 * (q[i].mem_ap.addr & 3); + return stlink_usb_write_mem8(stlink_dap_handle, ap_num, csw, addr, bufsize, buf); + + case CMD_MEM_AP_WRITE16: + for (unsigned int i = 0; i < count; i++) + h_u16_to_le(&buf[2 * i], q[i].mem_ap.data >> 8 * (q[i].mem_ap.addr & 2)); + return stlink_usb_write_mem16(stlink_dap_handle, ap_num, csw, addr, bufsize, buf); + + case CMD_MEM_AP_WRITE32: + for (unsigned int i = 0; i < count; i++) + h_u32_to_le(&buf[4 * i], q[i].mem_ap.data); + return stlink_usb_write_mem32(stlink_dap_handle, ap_num, csw, addr, bufsize, buf); + + case CMD_MEM_AP_READ8: + retval = stlink_usb_read_mem8(stlink_dap_handle, ap_num, csw, addr, bufsize, buf); + if (retval == ERROR_OK) + for (unsigned int i = 0; i < count; i++) + *q[i].mem_ap.p_data = buf[i] << 8 * (q[i].mem_ap.addr & 3); + return retval; + + case CMD_MEM_AP_READ16: + retval = stlink_usb_read_mem16(stlink_dap_handle, ap_num, csw, addr, bufsize, buf); + if (retval == ERROR_OK) + for (unsigned int i = 0; i < count; i++) + *q[i].mem_ap.p_data = le_to_h_u16(&buf[2 * i]) << 8 * (q[i].mem_ap.addr & 2); + return retval; + + case CMD_MEM_AP_READ32: + retval = stlink_usb_read_mem32(stlink_dap_handle, ap_num, csw, addr, bufsize, buf); + if (retval == ERROR_OK) + for (unsigned int i = 0; i < count; i++) + *q[i].mem_ap.p_data = le_to_h_u32(&buf[4 * i]); + return retval; + + default: + return ERROR_FAIL; + }; +} + +static int stlink_usb_count_buf_rw_queue(const struct dap_queue *q, unsigned int len) +{ + uint32_t incr = CMD_MEM_AP_2_SIZE(q[0].cmd); + unsigned int len_max; + + if (incr == 1) + len_max = stlink_usb_block(stlink_dap_handle); + else + len_max = STLINK_MAX_RW16_32 / incr; + + if (len > len_max) + len = len_max; + + for (unsigned int i = 1; i < len; i++) + if (q[i].cmd != q[0].cmd || + q[i].mem_ap.ap != q[0].mem_ap.ap || + q[i].mem_ap.csw != q[0].mem_ap.csw || + q[i].mem_ap.addr != q[i - 1].mem_ap.addr + incr) + return i; + + return len; +} + +static int stlink_usb_mem_rw_queue(void *handle, const struct dap_queue *q, unsigned int len, unsigned int *skip) +{ + unsigned int count = stlink_usb_count_buf_rw_queue(q, len); + + int retval = stlink_usb_buf_rw_segment(handle, q, count); + if (retval != ERROR_OK) + return retval; + + *skip = count; + return ERROR_OK; +} + static void stlink_dap_run_internal(struct adiv5_dap *dap) { int retval = stlink_dap_check_reconnect(dap); @@ -4143,9 +4232,10 @@ static void stlink_dap_run_internal(struct adiv5_dap *dap) unsigned int i = stlink_dap_handle->queue_index; struct dap_queue *q = &stlink_dap_handle->queue[0]; - uint8_t buf[4]; while (i && stlink_dap_get_error() == ERROR_OK) { + unsigned int skip = 1; + switch (q->cmd) { case CMD_DP_READ: retval = stlink_dap_dp_read(q->dp_r.dap, q->dp_r.reg, q->dp_r.p_data); @@ -4164,50 +4254,12 @@ static void stlink_dap_run_internal(struct adiv5_dap *dap) break; case CMD_MEM_AP_READ8: - retval = stlink_dap_open_ap(q->mem_ap.ap->ap_num); - if (retval == ERROR_OK) - retval = stlink_usb_read_mem8(stlink_dap_handle, q->mem_ap.ap->ap_num, q->mem_ap.csw, q->mem_ap.addr, - 1, buf); - if (retval == ERROR_OK) - *q->mem_ap.p_data = *buf << 8 * (q->mem_ap.addr & 3); - break; case CMD_MEM_AP_READ16: - retval = stlink_dap_open_ap(q->mem_ap.ap->ap_num); - if (retval == ERROR_OK) - retval = stlink_usb_read_mem16(stlink_dap_handle, q->mem_ap.ap->ap_num, q->mem_ap.csw, q->mem_ap.addr, - 2, buf); - if (retval == ERROR_OK) - *q->mem_ap.p_data = le_to_h_u16(buf) << 8 * (q->mem_ap.addr & 2); - break; case CMD_MEM_AP_READ32: - retval = stlink_dap_open_ap(q->mem_ap.ap->ap_num); - if (retval == ERROR_OK) - retval = stlink_usb_read_mem32(stlink_dap_handle, q->mem_ap.ap->ap_num, q->mem_ap.csw, q->mem_ap.addr, - 4, buf); - if (retval == ERROR_OK) - *q->mem_ap.p_data = le_to_h_u32(buf); - break; - case CMD_MEM_AP_WRITE8: - *buf = q->mem_ap.data >> 8 * (q->mem_ap.addr & 3); - retval = stlink_dap_open_ap(q->mem_ap.ap->ap_num); - if (retval == ERROR_OK) - retval = stlink_usb_write_mem8(stlink_dap_handle, q->mem_ap.ap->ap_num, q->mem_ap.csw, q->mem_ap.addr, - 1, buf); - break; case CMD_MEM_AP_WRITE16: - h_u16_to_le(buf, q->mem_ap.data >> 8 * (q->mem_ap.addr & 2)); - retval = stlink_dap_open_ap(q->mem_ap.ap->ap_num); - if (retval == ERROR_OK) - retval = stlink_usb_write_mem16(stlink_dap_handle, q->mem_ap.ap->ap_num, q->mem_ap.csw, q->mem_ap.addr, - 2, buf); - break; case CMD_MEM_AP_WRITE32: - h_u32_to_le(buf, q->mem_ap.data); - retval = stlink_dap_open_ap(q->mem_ap.ap->ap_num); - if (retval == ERROR_OK) - retval = stlink_usb_write_mem32(stlink_dap_handle, q->mem_ap.ap->ap_num, q->mem_ap.csw, q->mem_ap.addr, - 4, buf); + retval = stlink_usb_mem_rw_queue(stlink_dap_handle, q, i, &skip); break; default: @@ -4216,8 +4268,8 @@ static void stlink_dap_run_internal(struct adiv5_dap *dap) break; } stlink_dap_record_error(retval); - q++; - i--; + q += skip; + i -= skip; } stlink_dap_handle->queue_index = 0; |