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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
*/
#include <common.h>
#include <handoff.h>
#include <init.h>
#include <log.h>
#include <asm/fsp/fsp_support.h>
#include <asm/e820.h>
#include <asm/global_data.h>
#include <asm/mrccache.h>
#include <asm/mtrr.h>
#include <asm/post.h>
#include <dm/ofnode.h>
DECLARE_GLOBAL_DATA_PTR;
int fsp_scan_for_ram_size(void)
{
phys_size_t ram_size = 0;
const struct hob_header *hdr;
struct hob_res_desc *res_desc;
hdr = gd->arch.hob_list;
while (!end_of_hob(hdr)) {
if (hdr->type == HOB_TYPE_RES_DESC) {
res_desc = (struct hob_res_desc *)hdr;
if (res_desc->type == RES_SYS_MEM ||
res_desc->type == RES_MEM_RESERVED)
ram_size += res_desc->len;
}
hdr = get_next_hob(hdr);
}
gd->ram_size = ram_size;
post_code(POST_DRAM);
return 0;
};
int dram_init_banksize(void)
{
efi_guid_t fsp = FSP_HOB_RESOURCE_OWNER_FSP_GUID;
const struct hob_header *hdr;
struct hob_res_desc *res_desc;
phys_addr_t mtrr_top;
phys_addr_t low_end;
uint bank;
bool update_mtrr;
/*
* For FSP1, the system memory and reserved memory used by FSP are
* already programmed in the MTRR by FSP. Also it is observed that
* FSP on Intel Queensbay platform reports the TSEG memory range
* that has the same RES_MEM_RESERVED resource type whose address
* is programmed by FSP to be near the top of 4 GiB space, which is
* not what we want for DRAM.
*
* However it seems FSP2's behavior is different. We need to add the
* DRAM range in MTRR otherwise the boot process goes very slowly,
* which was observed on Chrromebook Coral with FSP2.
*/
update_mtrr = CONFIG_IS_ENABLED(FSP_VERSION2);
if (!ll_boot_init()) {
gd->bd->bi_dram[0].start = 0;
gd->bd->bi_dram[0].size = gd->ram_size;
if (update_mtrr)
mtrr_add_request(MTRR_TYPE_WRBACK, 0, gd->ram_size);
return 0;
}
low_end = 0; /* top of low memory usable by U-Boot */
mtrr_top = 0; /* top of low memory (even if reserved) */
for (bank = 1, hdr = gd->arch.hob_list;
bank < CONFIG_NR_DRAM_BANKS && !end_of_hob(hdr);
hdr = get_next_hob(hdr)) {
if (hdr->type != HOB_TYPE_RES_DESC)
continue;
res_desc = (struct hob_res_desc *)hdr;
if (!guidcmp(&res_desc->owner, &fsp))
low_end = res_desc->phys_start;
if (res_desc->type != RES_SYS_MEM &&
res_desc->type != RES_MEM_RESERVED)
continue;
if (res_desc->phys_start < (1ULL << 32)) {
mtrr_top = max(mtrr_top,
res_desc->phys_start + res_desc->len);
} else {
gd->bd->bi_dram[bank].start = res_desc->phys_start;
gd->bd->bi_dram[bank].size = res_desc->len;
if (update_mtrr)
mtrr_add_request(MTRR_TYPE_WRBACK,
res_desc->phys_start,
res_desc->len);
log_debug("ram %llx %llx\n",
gd->bd->bi_dram[bank].start,
gd->bd->bi_dram[bank].size);
}
}
/* Add the memory below 4GB */
gd->bd->bi_dram[0].start = 0;
gd->bd->bi_dram[0].size = low_end;
/*
* Set up an MTRR to the top of low, reserved memory. This is necessary
* for graphics to run at full speed in U-Boot.
*/
if (update_mtrr)
mtrr_add_request(MTRR_TYPE_WRBACK, 0, mtrr_top);
return 0;
}
unsigned int install_e820_map(unsigned int max_entries,
struct e820_entry *entries)
{
unsigned int num_entries = 0;
const struct hob_header *hdr;
struct hob_res_desc *res_desc;
const fdt64_t *prop;
int size;
hdr = gd->arch.hob_list;
while (!end_of_hob(hdr)) {
if (hdr->type == HOB_TYPE_RES_DESC) {
res_desc = (struct hob_res_desc *)hdr;
entries[num_entries].addr = res_desc->phys_start;
entries[num_entries].size = res_desc->len;
if (res_desc->type == RES_SYS_MEM)
entries[num_entries].type = E820_RAM;
else if (res_desc->type == RES_MEM_RESERVED)
entries[num_entries].type = E820_RESERVED;
num_entries++;
}
hdr = get_next_hob(hdr);
}
/* Mark PCIe ECAM address range as reserved */
entries[num_entries].addr = CONFIG_PCIE_ECAM_BASE;
entries[num_entries].size = CONFIG_PCIE_ECAM_SIZE;
entries[num_entries].type = E820_RESERVED;
num_entries++;
if (IS_ENABLED(CONFIG_HAVE_ACPI_RESUME)) {
ulong stack_size;
stack_size = CONFIG_IS_ENABLED(HAVE_ACPI_RESUME,
(CONFIG_STACK_SIZE_RESUME), (0));
/*
* Everything between U-Boot's stack and ram top needs to be
* reserved in order for ACPI S3 resume to work.
*/
entries[num_entries].addr = gd->start_addr_sp - stack_size;
entries[num_entries].size = gd->ram_top - gd->start_addr_sp +
stack_size;
entries[num_entries].type = E820_RESERVED;
num_entries++;
}
prop = ofnode_read_chosen_prop("e820-entries", &size);
if (prop) {
int count = size / (sizeof(u64) * 3);
int i;
if (num_entries + count >= max_entries)
return -ENOSPC;
for (i = 0; i < count; i++, num_entries++, prop += 3) {
entries[num_entries].addr = fdt64_to_cpu(prop[0]);
entries[num_entries].size = fdt64_to_cpu(prop[1]);
entries[num_entries].type = fdt64_to_cpu(prop[2]);
}
}
return num_entries;
}
#if CONFIG_IS_ENABLED(HANDOFF) && IS_ENABLED(CONFIG_USE_HOB)
int handoff_arch_save(struct spl_handoff *ho)
{
ho->arch.usable_ram_top = gd->bd->bi_dram[0].size;
ho->arch.hob_list = gd->arch.hob_list;
return 0;
}
#endif
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