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10c4ab898c
In Falcon Boot mode, the fdt blob should be move to the RAM from kernel BSS section. To avoid being cleared by BSS initialisation. SPL_PAYLOAD_ARGS_ADDR is the address where SPL copies. Signed-off-by: Randolph <randolph@andestech.com> Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
127 lines
3.6 KiB
C
127 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2019 Fraunhofer AISEC,
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* Lukas Auer <lukas.auer@aisec.fraunhofer.de>
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*
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* Based on common/spl/spl_atf.c
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*/
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#include <common.h>
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#include <cpu_func.h>
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#include <errno.h>
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#include <hang.h>
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#include <image.h>
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#include <spl.h>
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#include <asm/global_data.h>
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#include <asm/smp.h>
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#include <opensbi.h>
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#include <linux/libfdt.h>
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#include <linux/printk.h>
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#include <mapmem.h>
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DECLARE_GLOBAL_DATA_PTR;
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struct fw_dynamic_info opensbi_info;
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static int spl_opensbi_find_os_node(void *blob, int *uboot_node, int os_type)
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{
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int fit_images_node, node;
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const char *fit_os;
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fit_images_node = fdt_path_offset(blob, "/fit-images");
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if (fit_images_node < 0)
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return -ENODEV;
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fdt_for_each_subnode(node, blob, fit_images_node) {
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fit_os = fdt_getprop(blob, node, FIT_OS_PROP, NULL);
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if (!fit_os)
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continue;
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if (genimg_get_os_id(fit_os) == os_type) {
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*uboot_node = node;
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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 __noreturn spl_invoke_opensbi(struct spl_image_info *spl_image)
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{
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int ret, os_node;
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ulong os_entry;
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int os_type;
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typedef void __noreturn (*opensbi_entry_t)(ulong hartid, ulong dtb, ulong info);
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opensbi_entry_t opensbi_entry;
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if (!spl_image->fdt_addr) {
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pr_err("No device tree specified in SPL image\n");
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hang();
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}
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/*
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* Originally, u-boot-spl will place DTB directly after the kernel,
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* but the size of the kernel did not include the BSS section, which
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* means u-boot-spl will place the DTB in the kernel BSS section
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* causing the DTB to be cleared by kernel BSS initializtion.
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* Moving DTB in front of the kernel can avoid the error.
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*/
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#if CONFIG_IS_ENABLED(LOAD_FIT_OPENSBI_OS_BOOT) && \
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CONFIG_IS_ENABLED(PAYLOAD_ARGS_ADDR)
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memcpy((void *)CONFIG_SPL_PAYLOAD_ARGS_ADDR, spl_image->fdt_addr,
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fdt_totalsize(spl_image->fdt_addr));
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spl_image->fdt_addr = map_sysmem(CONFIG_SPL_PAYLOAD_ARGS_ADDR, 0);
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#endif
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/*
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* Find next os image in /fit-images
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* The next os image default is u-boot proper, once enable
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* OpenSBI OS boot mode, the OS image should be linux.
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*/
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if (CONFIG_IS_ENABLED(LOAD_FIT_OPENSBI_OS_BOOT))
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os_type = IH_OS_LINUX;
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else
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os_type = IH_OS_U_BOOT;
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ret = spl_opensbi_find_os_node(spl_image->fdt_addr, &os_node, os_type);
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if (ret) {
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pr_err("Can't find %s node for opensbi, %d\n",
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genimg_get_os_name(os_type), ret);
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hang();
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}
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/* Get U-Boot entry point */
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ret = fit_image_get_entry(spl_image->fdt_addr, os_node, &os_entry);
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if (ret)
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ret = fit_image_get_load(spl_image->fdt_addr, os_node, &os_entry);
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/* Prepare opensbi_info object */
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opensbi_info.magic = FW_DYNAMIC_INFO_MAGIC_VALUE;
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opensbi_info.version = FW_DYNAMIC_INFO_VERSION;
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opensbi_info.next_addr = os_entry;
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opensbi_info.next_mode = FW_DYNAMIC_INFO_NEXT_MODE_S;
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opensbi_info.options = CONFIG_SPL_OPENSBI_SCRATCH_OPTIONS;
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opensbi_info.boot_hart = gd->arch.boot_hart;
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opensbi_entry = (opensbi_entry_t)spl_image->entry_point;
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invalidate_icache_all();
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#ifdef CONFIG_SPL_SMP
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/*
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* Start OpenSBI on all secondary harts and wait for acknowledgment.
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*
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* OpenSBI first relocates itself to its link address. This is done by
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* the main hart. To make sure no hart is still running U-Boot SPL
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* during relocation, we wait for all secondary harts to acknowledge
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* the call-function request before entering OpenSBI on the main hart.
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* Otherwise, code corruption can occur if the link address ranges of
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* U-Boot SPL and OpenSBI overlap.
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*/
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ret = smp_call_function((ulong)spl_image->entry_point,
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(ulong)spl_image->fdt_addr,
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(ulong)&opensbi_info, 1);
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if (ret)
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hang();
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#endif
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opensbi_entry(gd->arch.boot_hart, (ulong)spl_image->fdt_addr,
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(ulong)&opensbi_info);
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}
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