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/*
* Copyright 2013 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <spi_flash.h>
#include <malloc.h>
#define ESPI_BOOT_IMAGE_SIZE 0x48
#define ESPI_BOOT_IMAGE_ADDR 0x50
#define CONFIG_CFG_DATA_SECTOR 0
/*
* The main entry for SPI booting. It's necessary that SDRAM is already
* configured and available since this code loads the main U-Boot image
* from SPI into SDRAM and starts it from there.
*/
void spi_boot(void)
{
void (*uboot)(void) __noreturn;
u32 offset, code_len;
unsigned char *buf = NULL;
struct spi_flash *flash;
flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
if (flash == NULL) {
puts("\nspi_flash_probe failed");
hang();
}
/*
* Load U-Boot image from SPI flash into RAM
*/
buf = malloc(flash->page_size);
if (buf == NULL) {
puts("\nmalloc failed");
hang();
}
memset(buf, 0, flash->page_size);
spi_flash_read(flash, CONFIG_CFG_DATA_SECTOR,
flash->page_size, (void *)buf);
offset = *(u32 *)(buf + ESPI_BOOT_IMAGE_ADDR);
/* Skip spl code */
offset += CONFIG_SYS_SPI_FLASH_U_BOOT_OFFS;
/* Get the code size from offset 0x48 */
code_len = *(u32 *)(buf + ESPI_BOOT_IMAGE_SIZE);
/* Skip spl code */
code_len = code_len - CONFIG_SPL_MAX_SIZE;
/* copy code to DDR */
spi_flash_read(flash, offset, code_len,
(void *)CONFIG_SYS_SPI_FLASH_U_BOOT_DST);
/*
* Jump to U-Boot image
*/
flush_cache(CONFIG_SYS_SPI_FLASH_U_BOOT_DST, code_len);
uboot = (void *)CONFIG_SYS_SPI_FLASH_U_BOOT_START;
(*uboot)();
}
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