154 lines
4.3 KiB
C
154 lines
4.3 KiB
C
// SPDX-License-Identifier: BSD-3-Clause
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/******************************************************************************
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*
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* Copyright (C) 2017-2018 Texas Instruments Incorporated - http://www.ti.com/
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*
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******************************************************************************/
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#include <stdint.h>
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#include <stdbool.h>
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#include "flashloader.h"
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/* Data buffers used by host to communicate with flashloader */
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/* Flashloader parameter structure. */
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__attribute__ ((section(".buffers.g_cfg")))
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volatile struct flash_params g_cfg[2];
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/* Data buffer 1. */
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__attribute__ ((section(".buffers.g_buf1")))
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uint8_t g_buf1[BUFFER_LEN];
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/* Data buffer 2. */
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__attribute__ ((section(".buffers.g_buf2")))
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uint8_t g_buf2[BUFFER_LEN];
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/* Buffer used for program with retain feature */
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__attribute__ ((section(".buffers.g_retain_buf")))
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uint8_t g_retain_buf[BUFFER_LEN];
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uint32_t g_curr_buf; /* Current buffer used. */
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uint32_t g_vims_ctl; /* Saved flash cache state. */
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/******************************************************************************
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*
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* This function stores the current VIMS configuration before
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* - disabling VIMS flash cache
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* - flushing the flash line buffers.
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*
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* Note Not using driverlib calls because it requires using "NO_ROM" define in
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* order to work for both Cha. R1 and R2 using the same code. Manually
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* doing the steps to minimize code footprint.
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*
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******************************************************************************/
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static void disable_flash_cache()
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{
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/* 1. Make sure VIMS is not currently changing mode (VIMS:STAT register) */
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while ((HWREG(0x40034000) & 0x00000008) == 0x8)
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;
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/* Save current VIMS:CTL state */
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g_vims_ctl = HWREG(0x40034004);
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/* 2. Set VIMS mode to OFF and disable flash line buffers */
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uint32_t new_vims_ctl = g_vims_ctl | 0x33;
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HWREG(0x40034004) = new_vims_ctl;
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/* 3. Wait for VIMS to have changed mode (VIMS:STAT register) */
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while ((HWREG(0x40034000) & 0x00000008) == 0x8)
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;
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}
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/******************************************************************************
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*
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* This function restores the VIMS configuration saved off by
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* disable_flash_cache().
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*
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* Note Not using driverlib calls because it requires using "NO_ROM" define in
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* order to work for both Cha. R1 and R2 using the same code. Manually
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* doing the steps to minimize code footprint.
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*
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******************************************************************************/
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static void restore_cache_state()
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{
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HWREG(0x40034004) = g_vims_ctl;
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/* Wait for VIMS to have changed mode (VIMS:STAT register) */
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while ((HWREG(0x40034000) & 0x00000008) == 0x8)
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;
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}
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/******************************************************************************
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*
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* CC13xx/CC26xx flashloader main function.
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*
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******************************************************************************/
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int main(void)
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{
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flashloader_init((struct flash_params *)g_cfg, g_buf1, g_buf2);
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g_curr_buf = 0; /* start with the first buffer */
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uint32_t status;
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while (1) {
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/* Wait for host to signal buffer is ready */
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while (g_cfg[g_curr_buf].full == BUFFER_EMPTY)
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;
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disable_flash_cache();
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/* Perform requested task */
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switch (g_cfg[g_curr_buf].cmd) {
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case CMD_ERASE_ALL:
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status = flashloader_erase_all();
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break;
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case CMD_PROGRAM:
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status =
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flashloader_program(
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(uint8_t *)g_cfg[g_curr_buf].buf_addr,
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g_cfg[g_curr_buf].dest, g_cfg[g_curr_buf].len);
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break;
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case CMD_ERASE_AND_PROGRAM:
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status =
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flashloader_erase_and_program(
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(uint8_t *)g_cfg[g_curr_buf].buf_addr,
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g_cfg[g_curr_buf].dest, g_cfg[g_curr_buf].len);
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break;
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case CMD_ERASE_AND_PROGRAM_WITH_RETAIN:
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status =
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flashloader_program_with_retain(
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(uint8_t *)g_cfg[g_curr_buf].buf_addr,
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g_cfg[g_curr_buf].dest, g_cfg[g_curr_buf].len);
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break;
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case CMD_ERASE_SECTORS:
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status =
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flashloader_erase_sectors(g_cfg[g_curr_buf].dest,
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g_cfg[g_curr_buf].len);
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break;
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default:
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status = STATUS_FAILED_UNKNOWN_COMMAND;
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break;
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}
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restore_cache_state();
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/* Enter infinite loop on error condition */
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if (status != STATUS_OK) {
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g_cfg[g_curr_buf].full = status;
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while (1)
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;
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}
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/* Mark current task complete, and begin looking at next buffer */
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g_cfg[g_curr_buf].full = BUFFER_EMPTY;
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g_curr_buf ^= 1;
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}
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}
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void _exit(int status)
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{
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/* Enter infinite loop on hitting an exit condition */
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(void)status; /* Unused parameter */
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while (1)
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;
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}
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