mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-09 22:33:28 +09:00
c793dbdb90
It is useful to be able to boot the same x86 image on a device with or without a first-stage bootloader. For example, with chromebook_coral, it is helpful for testing to be able to boot the same U-Boot (complete with FSP) on bare metal and from coreboot. It allows checking of things like CPU speed, comparing registers, ACPI tables and the like. When U-Boot is not the first-stage bootloader much of this code is not needed and can break booting. Add checks for this to the FSP code. Rather than checking for the amount of available SDRAM, just use 1GB in this situation, which should be safe. Using 2GB may run into a memory hole on some SoCs. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
143 lines
3.4 KiB
C
143 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
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*/
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#include <common.h>
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#include <handoff.h>
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#include <init.h>
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#include <asm/fsp/fsp_support.h>
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#include <asm/e820.h>
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#include <asm/mrccache.h>
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#include <asm/mtrr.h>
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#include <asm/post.h>
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DECLARE_GLOBAL_DATA_PTR;
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int fsp_scan_for_ram_size(void)
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{
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phys_size_t ram_size = 0;
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const struct hob_header *hdr;
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struct hob_res_desc *res_desc;
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hdr = gd->arch.hob_list;
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while (!end_of_hob(hdr)) {
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if (hdr->type == HOB_TYPE_RES_DESC) {
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res_desc = (struct hob_res_desc *)hdr;
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if (res_desc->type == RES_SYS_MEM ||
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res_desc->type == RES_MEM_RESERVED)
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ram_size += res_desc->len;
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}
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hdr = get_next_hob(hdr);
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}
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gd->ram_size = ram_size;
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post_code(POST_DRAM);
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return 0;
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};
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int dram_init_banksize(void)
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{
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const struct hob_header *hdr;
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struct hob_res_desc *res_desc;
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phys_addr_t low_end;
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uint bank;
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if (!ll_boot_init()) {
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gd->bd->bi_dram[0].start = 0;
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gd->bd->bi_dram[0].size = gd->ram_size;
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mtrr_add_request(MTRR_TYPE_WRBACK, 0, gd->ram_size);
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return 0;
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}
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low_end = 0;
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for (bank = 1, hdr = gd->arch.hob_list;
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bank < CONFIG_NR_DRAM_BANKS && !end_of_hob(hdr);
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hdr = get_next_hob(hdr)) {
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if (hdr->type != HOB_TYPE_RES_DESC)
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continue;
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res_desc = (struct hob_res_desc *)hdr;
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if (res_desc->type != RES_SYS_MEM &&
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res_desc->type != RES_MEM_RESERVED)
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continue;
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if (res_desc->phys_start < (1ULL << 32)) {
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low_end = max(low_end,
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res_desc->phys_start + res_desc->len);
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continue;
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}
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gd->bd->bi_dram[bank].start = res_desc->phys_start;
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gd->bd->bi_dram[bank].size = res_desc->len;
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mtrr_add_request(MTRR_TYPE_WRBACK, res_desc->phys_start,
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res_desc->len);
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log_debug("ram %llx %llx\n", gd->bd->bi_dram[bank].start,
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gd->bd->bi_dram[bank].size);
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}
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/* Add the memory below 4GB */
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gd->bd->bi_dram[0].start = 0;
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gd->bd->bi_dram[0].size = low_end;
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mtrr_add_request(MTRR_TYPE_WRBACK, 0, low_end);
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return 0;
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}
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unsigned int install_e820_map(unsigned int max_entries,
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struct e820_entry *entries)
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{
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unsigned int num_entries = 0;
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const struct hob_header *hdr;
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struct hob_res_desc *res_desc;
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hdr = gd->arch.hob_list;
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while (!end_of_hob(hdr)) {
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if (hdr->type == HOB_TYPE_RES_DESC) {
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res_desc = (struct hob_res_desc *)hdr;
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entries[num_entries].addr = res_desc->phys_start;
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entries[num_entries].size = res_desc->len;
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if (res_desc->type == RES_SYS_MEM)
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entries[num_entries].type = E820_RAM;
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else if (res_desc->type == RES_MEM_RESERVED)
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entries[num_entries].type = E820_RESERVED;
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num_entries++;
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}
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hdr = get_next_hob(hdr);
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}
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/* Mark PCIe ECAM address range as reserved */
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entries[num_entries].addr = CONFIG_PCIE_ECAM_BASE;
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entries[num_entries].size = CONFIG_PCIE_ECAM_SIZE;
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entries[num_entries].type = E820_RESERVED;
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num_entries++;
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#ifdef CONFIG_HAVE_ACPI_RESUME
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/*
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* Everything between U-Boot's stack and ram top needs to be
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* reserved in order for ACPI S3 resume to work.
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*/
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entries[num_entries].addr = gd->start_addr_sp - CONFIG_STACK_SIZE;
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entries[num_entries].size = gd->ram_top - gd->start_addr_sp +
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CONFIG_STACK_SIZE;
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entries[num_entries].type = E820_RESERVED;
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num_entries++;
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#endif
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return num_entries;
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}
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#if CONFIG_IS_ENABLED(HANDOFF) && IS_ENABLED(CONFIG_USE_HOB)
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int handoff_arch_save(struct spl_handoff *ho)
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{
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ho->arch.usable_ram_top = fsp_get_usable_lowmem_top(gd->arch.hob_list);
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ho->arch.hob_list = gd->arch.hob_list;
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return 0;
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}
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#endif
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