mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-24 19:08:50 +09:00
![Masahiro Yamada](/assets/img/avatar_default.png)
This reverts commit8c36e99f21
. There is misunderstanding in commit8c36e99f21
("armv8: release slave cores from CPU_RELEASE_ADDR"). How to bring the slave cores into U-Boot proper is platform-specific. So, it should be cared in SoC/board files instead of common/spl/spl.c. As you see SPL is the acronym of Secondary Program Loader, there is generally something that runs before SPL (the First one is usually Boot ROM). How to wake up slave cores from the Boot ROM is really SoC specific. So, the intention for the spin table support is to bring the slave cores into U-Boot proper in an SoC specific manner. (this must be done after relocation. see below.) If you bring the slaves into SPL, it is SoC own code responsibility to transfer them to U-Boot proper. The Spin Table defines the interface between a boot-loader and Linux kernel. It is unrelated to the interface between SPL and U-Boot proper. One more thing is missing in the commit; spl_image->entry_point points to the entry address of U-Boot *before* relocation. U-Boot relocates itself between board_init_f() and board_init_r(). This means the master CPU sees the different copy of the spin code than the slave CPUs enter. The spin_table_update_dt() protects the code *after* relocation. As a result, the slave CPUs spin in unprotected code, which leads to unstable behavior. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Simon Glass <sjg@chromium.org>
411 lines
11 KiB
C
411 lines
11 KiB
C
/*
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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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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.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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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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/* 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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/*
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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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/*
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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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void spl_set_header_raw_uboot(struct spl_image_info *spl_image)
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{
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spl_image->size = CONFIG_SYS_MONITOR_LEN;
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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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spl_image->os = IH_OS_U_BOOT;
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spl_image->name = "U-Boot";
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}
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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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u32 header_size = sizeof(struct image_header);
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if (image_get_magic(header) == IH_MAGIC) {
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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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(int)sizeof(spl_image->name), spl_image->name,
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spl_image->load_addr, spl_image->size);
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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_ABORT_ON_RAW_IMAGE
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/* Signature not found, proceed to other boot methods. */
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return -EINVAL;
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#else
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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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#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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int spl_init(void)
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{
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int ret;
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debug("spl_init()\n");
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/*
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* with CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN we set malloc_base and
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* malloc_limit in spl_relocate_stack_gd
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*/
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#if defined(CONFIG_SYS_MALLOC_F_LEN) && \
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!defined(CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN)
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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_SYS_MALLOC_F_LEN;
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gd->malloc_ptr = 0;
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#endif
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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 (IS_ENABLED(CONFIG_SPL_DM)) {
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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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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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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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return 0;
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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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#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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#ifndef CONFIG_PPC
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/*
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* timer_init() does not exist on PPC systems. The timer is initialized
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* and enabled (decrementer) in interrupt_init() here.
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*/
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timer_init();
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#endif
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#ifdef CONFIG_SPL_BOARD_INIT
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spl_board_init();
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#endif
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memset(&spl_image, '\0', sizeof(spl_image));
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board_boot_order(spl_boot_list);
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if (boot_from_devices(&spl_image, spl_boot_list,
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ARRAY_SIZE(spl_boot_list))) {
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puts("SPL: failed to boot from all boot devices\n");
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hang();
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}
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switch (spl_image.os) {
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case IH_OS_U_BOOT:
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debug("Jumping to U-Boot\n");
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break;
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#ifdef CONFIG_SPL_OS_BOOT
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case IH_OS_LINUX:
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debug("Jumping to Linux\n");
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spl_board_prepare_for_linux();
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jump_to_image_linux(&spl_image,
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(void *)CONFIG_SYS_SPL_ARGS_ADDR);
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#endif
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default:
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debug("Unsupported OS image.. Jumping nevertheless..\n");
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}
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#if defined(CONFIG_SYS_MALLOC_F_LEN) && !defined(CONFIG_SYS_SPL_MALLOC_SIZE)
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debug("SPL malloc() used %#lx bytes (%ld KB)\n", gd->malloc_ptr,
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gd->malloc_ptr / 1024);
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#endif
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debug("loaded - jumping to U-Boot...\n");
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spl_board_prepare_for_boot();
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jump_to_image_no_args(&spl_image);
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}
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/*
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* This requires UART clocks to be enabled. In order for this to work the
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* caller must ensure that the gd pointer is valid.
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*/
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void preloader_console_init(void)
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{
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gd->bd = &bdata;
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gd->baudrate = CONFIG_BAUDRATE;
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serial_init(); /* serial communications setup */
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gd->have_console = 1;
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puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
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U_BOOT_TIME ")\n");
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#ifdef CONFIG_SPL_DISPLAY_PRINT
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spl_display_print();
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#endif
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}
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/**
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* spl_relocate_stack_gd() - Relocate stack ready for board_init_r() execution
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*
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* Sometimes board_init_f() runs with a stack in SRAM but we want to use SDRAM
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* for the main board_init_r() execution. This is typically because we need
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* more stack space for things like the MMC sub-system.
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*
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* This function calculates the stack position, copies the global_data into
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* place, sets the new gd (except for ARM, for which setting GD within a C
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* function may not always work) and returns the new stack position. The
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* caller is responsible for setting up the sp register and, in the case
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* of ARM, setting up gd.
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*
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* All of this is done using the same layout and alignments as done in
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* board_init_f_init_reserve() / board_init_f_alloc_reserve().
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*
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* @return new stack location, or 0 to use the same stack
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*/
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ulong spl_relocate_stack_gd(void)
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{
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#ifdef CONFIG_SPL_STACK_R
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gd_t *new_gd;
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ulong ptr = CONFIG_SPL_STACK_R_ADDR;
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#ifdef CONFIG_SPL_SYS_MALLOC_SIMPLE
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if (CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN) {
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ptr -= CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
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gd->malloc_base = ptr;
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gd->malloc_limit = CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
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gd->malloc_ptr = 0;
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}
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#endif
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/* Get stack position: use 8-byte alignment for ABI compliance */
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ptr = CONFIG_SPL_STACK_R_ADDR - roundup(sizeof(gd_t),16);
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new_gd = (gd_t *)ptr;
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memcpy(new_gd, (void *)gd, sizeof(gd_t));
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#if CONFIG_IS_ENABLED(DM)
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dm_fixup_for_gd_move(new_gd);
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#endif
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#if !defined(CONFIG_ARM)
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gd = new_gd;
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#endif
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return ptr;
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#else
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return 0;
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#endif
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}
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