mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-08 22:03:22 +09:00
182 lines
4.0 KiB
C
182 lines
4.0 KiB
C
/*
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* (C) Copyright 2000-2009
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* Vipin Kumar, ST Microelectronics, vipin.kumar@st.com
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*
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* Copyright (C) 2012 Stefan Roese <sr@denx.de>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <image.h>
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#include <linux/compiler.h>
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#include <asm/io.h>
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#include <asm/arch/spr_defs.h>
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#include <linux/mtd/st_smi.h>
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static const char kernel_name[] = "Linux";
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static const char loader_name[] = "U-Boot";
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int image_check_header(image_header_t *hdr, const char *name)
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{
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if (image_check_magic(hdr) &&
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(!strncmp(image_get_name(hdr), name, strlen(name))) &&
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image_check_hcrc(hdr)) {
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return 1;
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}
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return 0;
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}
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int image_check_data(image_header_t *hdr)
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{
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if (image_check_dcrc(hdr))
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return 1;
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return 0;
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}
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/*
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* SNOR (Serial NOR flash) related functions
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*/
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void snor_init(void)
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{
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struct smi_regs *const smicntl =
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(struct smi_regs * const)CONFIG_SYS_SMI_BASE;
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/* Setting the fast mode values. SMI working at 166/4 = 41.5 MHz */
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writel(HOLD1 | FAST_MODE | BANK_EN | DSEL_TIME | PRESCAL4,
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&smicntl->smi_cr1);
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}
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static int snor_image_load(u8 *load_addr, void (**image_p)(void),
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const char *image_name)
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{
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image_header_t *header;
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/*
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* Since calculating the crc in the SNOR flash does not
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* work, we copy the image to the destination address
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* minus the header size. And point the header to this
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* new destination. This will not work for address 0
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* of course.
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*/
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header = (image_header_t *)load_addr;
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memcpy((ulong *)(image_get_load(header) - sizeof(image_header_t)),
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(const ulong *)load_addr,
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image_get_data_size(header) + sizeof(image_header_t));
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header = (image_header_t *)(image_get_load(header) -
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sizeof(image_header_t));
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if (image_check_header(header, image_name)) {
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if (image_check_data(header)) {
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/* Jump to boot image */
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*image_p = (void *)image_get_load(header);
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return 1;
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}
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}
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return 0;
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}
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static void boot_image(void (*image)(void))
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{
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void (*funcp)(void) __noreturn = (void *)image;
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(*funcp)();
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}
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/*
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* spl_boot:
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*
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* All supported booting types of all supported SoCs are listed here.
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* Generic readback APIs are provided for each supported booting type
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* eg. nand_read_skip_bad
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*/
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u32 spl_boot(void)
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{
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void (*image)(void);
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#ifdef CONFIG_SPEAR_USBTTY
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plat_late_init();
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return 1;
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#endif
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/*
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* All the supported booting devices are listed here. Each of
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* the booting type supported by the platform would define the
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* macro xxx_BOOT_SUPPORTED to true.
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*/
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if (SNOR_BOOT_SUPPORTED && snor_boot_selected()) {
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/* SNOR-SMI initialization */
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snor_init();
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serial_puts("Booting via SNOR\n");
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/* Serial NOR booting */
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if (1 == snor_image_load((u8 *)CONFIG_SYS_UBOOT_BASE,
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&image, loader_name)) {
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/* Platform related late initialasations */
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plat_late_init();
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/* Jump to boot image */
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serial_puts("Jumping to U-Boot\n");
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boot_image(image);
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return 1;
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}
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}
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if (NAND_BOOT_SUPPORTED && nand_boot_selected()) {
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/* NAND booting */
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/* Not ported from XLoader to SPL yet */
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return 0;
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}
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if (PNOR_BOOT_SUPPORTED && pnor_boot_selected()) {
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/* PNOR booting */
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/* Not ported from XLoader to SPL yet */
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return 0;
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}
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if (MMC_BOOT_SUPPORTED && mmc_boot_selected()) {
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/* MMC booting */
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/* Not ported from XLoader to SPL yet */
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return 0;
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}
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if (SPI_BOOT_SUPPORTED && spi_boot_selected()) {
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/* SPI booting */
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/* Not supported for any platform as of now */
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return 0;
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}
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if (I2C_BOOT_SUPPORTED && i2c_boot_selected()) {
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/* I2C booting */
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/* Not supported for any platform as of now */
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return 0;
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}
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/*
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* All booting types without memory are listed as below
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* Control has to be returned to BootROM in case of all
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* the following booting scenarios
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*/
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if (USB_BOOT_SUPPORTED && usb_boot_selected()) {
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plat_late_init();
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return 1;
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}
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if (TFTP_BOOT_SUPPORTED && tftp_boot_selected()) {
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plat_late_init();
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return 1;
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}
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if (UART_BOOT_SUPPORTED && uart_boot_selected()) {
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plat_late_init();
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return 1;
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}
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/* Ideally, the control should not reach here. */
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hang();
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}
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