mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-19 16:38:53 +09:00
![Marek Vasut](/assets/img/avatar_default.png)
The SPL loaders assume that the CONFIG_SYS_TEXT_BASE memory location is available and can be corrupted by loading ie. uImage or fitImage headers there. Sometimes it could be beneficial to load the headers elsewhere, ie. if CONFIG_SYS_TEXT_BASE is not yet writable while we still want to parse the image headers in some local onchip memory to ie. extract firmware from that image. Add the possibility to override the location where the headers get loaded by introducing new function, spl_get_load_buffer() which takes two arguments -- offset from the CONFIG_SYS_TEXT_BASE and size of the data that are to be loaded there -- and returns a valid buffer address or hangs the system. The default behavior is the same as before, add the offset to CONFIG_SYS_TEXT_BASE and return that address. User can override the weak spl_get_load_buffer() function though. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
638 lines
16 KiB
C
638 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2010
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* Texas Instruments, <www.ti.com>
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*
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* Aneesh V <aneesh@ti.com>
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*/
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#include <common.h>
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#include <binman_sym.h>
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#include <dm.h>
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#include <spl.h>
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#include <asm/u-boot.h>
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#include <nand.h>
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#include <fat.h>
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#include <version.h>
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#include <image.h>
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#include <malloc.h>
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#include <dm/root.h>
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#include <linux/compiler.h>
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#include <fdt_support.h>
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#include <bootcount.h>
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DECLARE_GLOBAL_DATA_PTR;
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#ifndef CONFIG_SYS_UBOOT_START
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#define CONFIG_SYS_UBOOT_START CONFIG_SYS_TEXT_BASE
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#endif
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#ifndef CONFIG_SYS_MONITOR_LEN
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/* Unknown U-Boot size, let's assume it will not be more than 200 KB */
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#define CONFIG_SYS_MONITOR_LEN (200 * 1024)
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#endif
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u32 *boot_params_ptr = NULL;
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/* See spl.h for information about this */
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binman_sym_declare(ulong, u_boot_any, image_pos);
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/* Define board data structure */
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static bd_t bdata __attribute__ ((section(".data")));
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/*
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* Board-specific Platform code can reimplement show_boot_progress () if needed
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*/
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__weak void show_boot_progress(int val) {}
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/*
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* Default function to determine if u-boot or the OS should
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* be started. This implementation always returns 1.
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*
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* Please implement your own board specific funcion to do this.
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*
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* RETURN
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* 0 to not start u-boot
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* positive if u-boot should start
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*/
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#ifdef CONFIG_SPL_OS_BOOT
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__weak int spl_start_uboot(void)
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{
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puts("SPL: Please implement spl_start_uboot() for your board\n");
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puts("SPL: Direct Linux boot not active!\n");
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return 1;
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}
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/* weak default platform specific function to initialize
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* dram banks
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*/
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__weak int dram_init_banksize(void)
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{
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return 0;
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}
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/*
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* Weak default function for arch specific zImage check. Return zero
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* and fill start and end address if image is recognized.
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*/
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int __weak bootz_setup(ulong image, ulong *start, ulong *end)
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{
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return 1;
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}
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#endif
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/* Weak default function for arch/board-specific fixups to the spl_image_info */
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void __weak spl_perform_fixups(struct spl_image_info *spl_image)
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{
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}
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void spl_fixup_fdt(void)
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{
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#if defined(CONFIG_SPL_OF_LIBFDT) && defined(CONFIG_SYS_SPL_ARGS_ADDR)
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void *fdt_blob = (void *)CONFIG_SYS_SPL_ARGS_ADDR;
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int err;
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err = fdt_check_header(fdt_blob);
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if (err < 0) {
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printf("fdt_root: %s\n", fdt_strerror(err));
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return;
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}
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/* fixup the memory dt node */
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err = fdt_shrink_to_minimum(fdt_blob, 0);
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if (err == 0) {
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printf("spl: fdt_shrink_to_minimum err - %d\n", err);
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return;
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}
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err = arch_fixup_fdt(fdt_blob);
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if (err) {
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printf("spl: arch_fixup_fdt err - %d\n", err);
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return;
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}
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#endif
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}
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/*
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* Weak default function for board specific cleanup/preparation before
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* Linux boot. Some boards/platforms might not need it, so just provide
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* an empty stub here.
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*/
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__weak void spl_board_prepare_for_linux(void)
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{
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/* Nothing to do! */
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}
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__weak void spl_board_prepare_for_boot(void)
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{
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/* Nothing to do! */
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}
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__weak struct image_header *spl_get_load_buffer(ssize_t offset, size_t size)
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{
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return (struct image_header *)(CONFIG_SYS_TEXT_BASE + offset);
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}
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void spl_set_header_raw_uboot(struct spl_image_info *spl_image)
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{
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ulong u_boot_pos = binman_sym(ulong, u_boot_any, image_pos);
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spl_image->size = CONFIG_SYS_MONITOR_LEN;
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/*
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* Binman error cases: address of the end of the previous region or the
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* start of the image's entry area (usually 0) if there is no previous
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* region.
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*/
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if (u_boot_pos && u_boot_pos != BINMAN_SYM_MISSING) {
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/* Binman does not support separated entry addresses */
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spl_image->entry_point = u_boot_pos;
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spl_image->load_addr = u_boot_pos;
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} else {
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spl_image->entry_point = CONFIG_SYS_UBOOT_START;
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spl_image->load_addr = CONFIG_SYS_TEXT_BASE;
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}
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spl_image->os = IH_OS_U_BOOT;
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spl_image->name = "U-Boot";
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}
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#ifdef CONFIG_SPL_LOAD_FIT_FULL
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/* Parse and load full fitImage in SPL */
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static int spl_load_fit_image(struct spl_image_info *spl_image,
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const struct image_header *header)
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{
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bootm_headers_t images;
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const char *fit_uname_config = NULL;
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const char *fit_uname_fdt = FIT_FDT_PROP;
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const char *uname;
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ulong fw_data = 0, dt_data = 0, img_data = 0;
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ulong fw_len = 0, dt_len = 0, img_len = 0;
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int idx, conf_noffset;
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int ret;
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#ifdef CONFIG_SPL_FIT_SIGNATURE
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images.verify = 1;
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#endif
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ret = fit_image_load(&images, (ulong)header,
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NULL, &fit_uname_config,
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IH_ARCH_DEFAULT, IH_TYPE_STANDALONE, -1,
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FIT_LOAD_REQUIRED, &fw_data, &fw_len);
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if (ret < 0)
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return ret;
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spl_image->size = fw_len;
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spl_image->entry_point = fw_data;
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spl_image->load_addr = fw_data;
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spl_image->os = IH_OS_U_BOOT;
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spl_image->name = "U-Boot";
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debug("spl: payload image: %.*s load addr: 0x%lx size: %d\n",
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(int)sizeof(spl_image->name), spl_image->name,
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spl_image->load_addr, spl_image->size);
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#ifdef CONFIG_SPL_FIT_SIGNATURE
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images.verify = 1;
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#endif
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fit_image_load(&images, (ulong)header,
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&fit_uname_fdt, &fit_uname_config,
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IH_ARCH_DEFAULT, IH_TYPE_FLATDT, -1,
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FIT_LOAD_OPTIONAL, &dt_data, &dt_len);
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conf_noffset = fit_conf_get_node((const void *)header,
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fit_uname_config);
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if (conf_noffset <= 0)
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return 0;
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for (idx = 0;
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uname = fdt_stringlist_get((const void *)header, conf_noffset,
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FIT_LOADABLE_PROP, idx,
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NULL), uname;
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idx++)
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{
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#ifdef CONFIG_SPL_FIT_SIGNATURE
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images.verify = 1;
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#endif
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ret = fit_image_load(&images, (ulong)header,
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&uname, &fit_uname_config,
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IH_ARCH_DEFAULT, IH_TYPE_LOADABLE, -1,
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FIT_LOAD_OPTIONAL_NON_ZERO,
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&img_data, &img_len);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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#endif
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int spl_parse_image_header(struct spl_image_info *spl_image,
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const struct image_header *header)
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{
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#ifdef CONFIG_SPL_LOAD_FIT_FULL
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int ret = spl_load_fit_image(spl_image, header);
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if (!ret)
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return ret;
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#endif
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if (image_get_magic(header) == IH_MAGIC) {
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#ifdef CONFIG_SPL_LEGACY_IMAGE_SUPPORT
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u32 header_size = sizeof(struct image_header);
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if (spl_image->flags & SPL_COPY_PAYLOAD_ONLY) {
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/*
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* On some system (e.g. powerpc), the load-address and
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* entry-point is located at address 0. We can't load
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* to 0-0x40. So skip header in this case.
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*/
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spl_image->load_addr = image_get_load(header);
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spl_image->entry_point = image_get_ep(header);
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spl_image->size = image_get_data_size(header);
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} else {
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spl_image->entry_point = image_get_load(header);
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/* Load including the header */
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spl_image->load_addr = spl_image->entry_point -
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header_size;
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spl_image->size = image_get_data_size(header) +
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header_size;
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}
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spl_image->os = image_get_os(header);
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spl_image->name = image_get_name(header);
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debug("spl: payload image: %.*s load addr: 0x%lx size: %d\n",
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IH_NMLEN, spl_image->name,
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spl_image->load_addr, spl_image->size);
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#else
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/* LEGACY image not supported */
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debug("Legacy boot image support not enabled, proceeding to other boot methods\n");
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return -EINVAL;
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#endif
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} else {
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#ifdef CONFIG_SPL_PANIC_ON_RAW_IMAGE
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/*
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* CONFIG_SPL_PANIC_ON_RAW_IMAGE is defined when the
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* code which loads images in SPL cannot guarantee that
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* absolutely all read errors will be reported.
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* An example is the LPC32XX MLC NAND driver, which
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* will consider that a completely unreadable NAND block
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* is bad, and thus should be skipped silently.
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*/
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panic("** no mkimage signature but raw image not supported");
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#endif
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#ifdef CONFIG_SPL_OS_BOOT
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ulong start, end;
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if (!bootz_setup((ulong)header, &start, &end)) {
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spl_image->name = "Linux";
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spl_image->os = IH_OS_LINUX;
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spl_image->load_addr = CONFIG_SYS_LOAD_ADDR;
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spl_image->entry_point = CONFIG_SYS_LOAD_ADDR;
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spl_image->size = end - start;
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debug("spl: payload zImage, load addr: 0x%lx size: %d\n",
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spl_image->load_addr, spl_image->size);
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return 0;
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}
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#endif
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#ifdef CONFIG_SPL_RAW_IMAGE_SUPPORT
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/* Signature not found - assume u-boot.bin */
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debug("mkimage signature not found - ih_magic = %x\n",
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header->ih_magic);
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spl_set_header_raw_uboot(spl_image);
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#else
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/* RAW image not supported, proceed to other boot methods. */
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debug("Raw boot image support not enabled, proceeding to other boot methods\n");
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return -EINVAL;
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#endif
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}
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return 0;
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}
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__weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
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{
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typedef void __noreturn (*image_entry_noargs_t)(void);
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image_entry_noargs_t image_entry =
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(image_entry_noargs_t)spl_image->entry_point;
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debug("image entry point: 0x%lX\n", spl_image->entry_point);
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image_entry();
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}
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static int spl_common_init(bool setup_malloc)
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{
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int ret;
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#if CONFIG_VAL(SYS_MALLOC_F_LEN)
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if (setup_malloc) {
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#ifdef CONFIG_MALLOC_F_ADDR
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gd->malloc_base = CONFIG_MALLOC_F_ADDR;
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#endif
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gd->malloc_limit = CONFIG_VAL(SYS_MALLOC_F_LEN);
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gd->malloc_ptr = 0;
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}
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#endif
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ret = bootstage_init(true);
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if (ret) {
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debug("%s: Failed to set up bootstage: ret=%d\n", __func__,
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ret);
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return ret;
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}
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bootstage_mark_name(BOOTSTAGE_ID_START_SPL, "spl");
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if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) {
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ret = fdtdec_setup();
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if (ret) {
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debug("fdtdec_setup() returned error %d\n", ret);
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return ret;
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}
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}
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if (CONFIG_IS_ENABLED(DM)) {
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bootstage_start(BOOTSTATE_ID_ACCUM_DM_SPL, "dm_spl");
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/* With CONFIG_SPL_OF_PLATDATA, bring in all devices */
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ret = dm_init_and_scan(!CONFIG_IS_ENABLED(OF_PLATDATA));
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bootstage_accum(BOOTSTATE_ID_ACCUM_DM_SPL);
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if (ret) {
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debug("dm_init_and_scan() returned error %d\n", ret);
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return ret;
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}
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}
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return 0;
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}
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void spl_set_bd(void)
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{
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if (!gd->bd)
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gd->bd = &bdata;
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}
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int spl_early_init(void)
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{
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int ret;
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debug("%s\n", __func__);
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ret = spl_common_init(true);
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if (ret)
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return ret;
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gd->flags |= GD_FLG_SPL_EARLY_INIT;
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return 0;
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}
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int spl_init(void)
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{
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int ret;
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bool setup_malloc = !(IS_ENABLED(CONFIG_SPL_STACK_R) &&
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IS_ENABLED(CONFIG_SPL_SYS_MALLOC_SIMPLE));
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debug("%s\n", __func__);
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if (!(gd->flags & GD_FLG_SPL_EARLY_INIT)) {
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ret = spl_common_init(setup_malloc);
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if (ret)
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return ret;
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}
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gd->flags |= GD_FLG_SPL_INIT;
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return 0;
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}
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#ifndef BOOT_DEVICE_NONE
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#define BOOT_DEVICE_NONE 0xdeadbeef
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#endif
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__weak void board_boot_order(u32 *spl_boot_list)
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{
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spl_boot_list[0] = spl_boot_device();
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}
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static struct spl_image_loader *spl_ll_find_loader(uint boot_device)
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{
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struct spl_image_loader *drv =
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ll_entry_start(struct spl_image_loader, spl_image_loader);
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const int n_ents =
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ll_entry_count(struct spl_image_loader, spl_image_loader);
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struct spl_image_loader *entry;
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for (entry = drv; entry != drv + n_ents; entry++) {
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if (boot_device == entry->boot_device)
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return entry;
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}
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/* Not found */
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return NULL;
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}
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static int spl_load_image(struct spl_image_info *spl_image,
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struct spl_image_loader *loader)
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{
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struct spl_boot_device bootdev;
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bootdev.boot_device = loader->boot_device;
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bootdev.boot_device_name = NULL;
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return loader->load_image(spl_image, &bootdev);
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}
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/**
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* boot_from_devices() - Try loading an booting U-Boot from a list of devices
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*
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* @spl_image: Place to put the image details if successful
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* @spl_boot_list: List of boot devices to try
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* @count: Number of elements in spl_boot_list
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* @return 0 if OK, -ve on error
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*/
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static int boot_from_devices(struct spl_image_info *spl_image,
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u32 spl_boot_list[], int count)
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{
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int i;
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for (i = 0; i < count && spl_boot_list[i] != BOOT_DEVICE_NONE; i++) {
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struct spl_image_loader *loader;
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loader = spl_ll_find_loader(spl_boot_list[i]);
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#if defined(CONFIG_SPL_SERIAL_SUPPORT) && defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
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if (loader)
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printf("Trying to boot from %s\n", loader->name);
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else
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puts("SPL: Unsupported Boot Device!\n");
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#endif
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if (loader && !spl_load_image(spl_image, loader)) {
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spl_image->boot_device = spl_boot_list[i];
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return 0;
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}
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}
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return -ENODEV;
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}
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void board_init_r(gd_t *dummy1, ulong dummy2)
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{
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u32 spl_boot_list[] = {
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BOOT_DEVICE_NONE,
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BOOT_DEVICE_NONE,
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BOOT_DEVICE_NONE,
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BOOT_DEVICE_NONE,
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BOOT_DEVICE_NONE,
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};
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struct spl_image_info spl_image;
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debug(">>spl:board_init_r()\n");
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spl_set_bd();
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#ifdef CONFIG_SPL_OS_BOOT
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dram_init_banksize();
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#endif
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#if defined(CONFIG_SYS_SPL_MALLOC_START)
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mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
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CONFIG_SYS_SPL_MALLOC_SIZE);
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gd->flags |= GD_FLG_FULL_MALLOC_INIT;
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#endif
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if (!(gd->flags & GD_FLG_SPL_INIT)) {
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if (spl_init())
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hang();
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}
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#if !defined(CONFIG_PPC) && !defined(CONFIG_ARCH_MX6)
|
|
/*
|
|
* timer_init() does not exist on PPC systems. The timer is initialized
|
|
* and enabled (decrementer) in interrupt_init() here.
|
|
*/
|
|
timer_init();
|
|
#endif
|
|
|
|
#if CONFIG_IS_ENABLED(BOARD_INIT)
|
|
spl_board_init();
|
|
#endif
|
|
|
|
bootcount_inc();
|
|
|
|
memset(&spl_image, '\0', sizeof(spl_image));
|
|
#ifdef CONFIG_SYS_SPL_ARGS_ADDR
|
|
spl_image.arg = (void *)CONFIG_SYS_SPL_ARGS_ADDR;
|
|
#endif
|
|
spl_image.boot_device = BOOT_DEVICE_NONE;
|
|
board_boot_order(spl_boot_list);
|
|
|
|
if (boot_from_devices(&spl_image, spl_boot_list,
|
|
ARRAY_SIZE(spl_boot_list))) {
|
|
puts("SPL: failed to boot from all boot devices\n");
|
|
hang();
|
|
}
|
|
|
|
spl_perform_fixups(&spl_image);
|
|
|
|
#ifdef CONFIG_CPU_V7M
|
|
spl_image.entry_point |= 0x1;
|
|
#endif
|
|
switch (spl_image.os) {
|
|
case IH_OS_U_BOOT:
|
|
debug("Jumping to U-Boot\n");
|
|
break;
|
|
#if CONFIG_IS_ENABLED(ATF)
|
|
case IH_OS_ARM_TRUSTED_FIRMWARE:
|
|
debug("Jumping to U-Boot via ARM Trusted Firmware\n");
|
|
spl_invoke_atf(&spl_image);
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_SPL_OS_BOOT
|
|
case IH_OS_LINUX:
|
|
debug("Jumping to Linux\n");
|
|
spl_fixup_fdt();
|
|
spl_board_prepare_for_linux();
|
|
jump_to_image_linux(&spl_image);
|
|
#endif
|
|
default:
|
|
debug("Unsupported OS image.. Jumping nevertheless..\n");
|
|
}
|
|
#if CONFIG_VAL(SYS_MALLOC_F_LEN) && !defined(CONFIG_SYS_SPL_MALLOC_SIZE)
|
|
debug("SPL malloc() used %#lx bytes (%ld KB)\n", gd->malloc_ptr,
|
|
gd->malloc_ptr / 1024);
|
|
#endif
|
|
#ifdef CONFIG_BOOTSTAGE_STASH
|
|
int ret;
|
|
|
|
bootstage_mark_name(BOOTSTAGE_ID_END_SPL, "end_spl");
|
|
ret = bootstage_stash((void *)CONFIG_BOOTSTAGE_STASH_ADDR,
|
|
CONFIG_BOOTSTAGE_STASH_SIZE);
|
|
if (ret)
|
|
debug("Failed to stash bootstage: err=%d\n", ret);
|
|
#endif
|
|
|
|
debug("loaded - jumping to U-Boot...\n");
|
|
spl_board_prepare_for_boot();
|
|
jump_to_image_no_args(&spl_image);
|
|
}
|
|
|
|
#ifdef CONFIG_SPL_SERIAL_SUPPORT
|
|
/*
|
|
* This requires UART clocks to be enabled. In order for this to work the
|
|
* caller must ensure that the gd pointer is valid.
|
|
*/
|
|
void preloader_console_init(void)
|
|
{
|
|
gd->baudrate = CONFIG_BAUDRATE;
|
|
|
|
serial_init(); /* serial communications setup */
|
|
|
|
gd->have_console = 1;
|
|
|
|
#ifndef CONFIG_SPL_DISABLE_BANNER_PRINT
|
|
puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
|
|
U_BOOT_TIME " " U_BOOT_TZ ")\n");
|
|
#endif
|
|
#ifdef CONFIG_SPL_DISPLAY_PRINT
|
|
spl_display_print();
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* spl_relocate_stack_gd() - Relocate stack ready for board_init_r() execution
|
|
*
|
|
* Sometimes board_init_f() runs with a stack in SRAM but we want to use SDRAM
|
|
* for the main board_init_r() execution. This is typically because we need
|
|
* more stack space for things like the MMC sub-system.
|
|
*
|
|
* This function calculates the stack position, copies the global_data into
|
|
* place, sets the new gd (except for ARM, for which setting GD within a C
|
|
* function may not always work) and returns the new stack position. The
|
|
* caller is responsible for setting up the sp register and, in the case
|
|
* of ARM, setting up gd.
|
|
*
|
|
* All of this is done using the same layout and alignments as done in
|
|
* board_init_f_init_reserve() / board_init_f_alloc_reserve().
|
|
*
|
|
* @return new stack location, or 0 to use the same stack
|
|
*/
|
|
ulong spl_relocate_stack_gd(void)
|
|
{
|
|
#ifdef CONFIG_SPL_STACK_R
|
|
gd_t *new_gd;
|
|
ulong ptr = CONFIG_SPL_STACK_R_ADDR;
|
|
|
|
#if defined(CONFIG_SPL_SYS_MALLOC_SIMPLE) && CONFIG_VAL(SYS_MALLOC_F_LEN)
|
|
if (CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN) {
|
|
ptr -= CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
|
|
gd->malloc_base = ptr;
|
|
gd->malloc_limit = CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
|
|
gd->malloc_ptr = 0;
|
|
}
|
|
#endif
|
|
/* Get stack position: use 8-byte alignment for ABI compliance */
|
|
ptr = CONFIG_SPL_STACK_R_ADDR - roundup(sizeof(gd_t),16);
|
|
new_gd = (gd_t *)ptr;
|
|
memcpy(new_gd, (void *)gd, sizeof(gd_t));
|
|
#if CONFIG_IS_ENABLED(DM)
|
|
dm_fixup_for_gd_move(new_gd);
|
|
#endif
|
|
#if !defined(CONFIG_ARM)
|
|
gd = new_gd;
|
|
#endif
|
|
return ptr;
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|