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/*
* This file is part of the coreboot project.
*
* Copyright 2015 Google Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <stdlib.h>
#include <cbfs.h>
#include <cbmem.h>
#include <compiler.h>
#include <console/console.h>
#include <fallback.h>
#include <halt.h>
#include <lib.h>
#include <program_loading.h>
#include <reset.h>
#include <romstage_handoff.h>
#include <rmodule.h>
#include <rules.h>
#include <stage_cache.h>
#include <symbols.h>
#include <timestamp.h>
#include <cbfs.h>
#include <fit_payload.h>
/* Only can represent up to 1 byte less than size_t. */
const struct mem_region_device addrspace_32bit =
MEM_REGION_DEV_RO_INIT(0, ~0UL);
int prog_locate(struct prog *prog)
{
struct cbfsf file;
cbfs_prepare_program_locate();
if (cbfs_boot_locate(&file, prog_name(prog), NULL))
return -1;
cbfsf_file_type(&file, &prog->cbfs_type);
cbfs_file_data(prog_rdev(prog), &file);
return 0;
}
void run_romstage(void)
{
struct prog romstage =
PROG_INIT(PROG_ROMSTAGE, CONFIG_CBFS_PREFIX "/romstage");
if (prog_locate(&romstage))
goto fail;
timestamp_add_now(TS_START_COPYROM);
if (cbfs_prog_stage_load(&romstage))
goto fail;
timestamp_add_now(TS_END_COPYROM);
prog_run(&romstage);
fail:
if (IS_ENABLED(CONFIG_BOOTBLOCK_CONSOLE))
die("Couldn't load romstage.\n");
halt();
}
void __weak stage_cache_add(int stage_id,
const struct prog *stage) {}
void __weak stage_cache_load_stage(int stage_id,
struct prog *stage) {}
static void ramstage_cache_invalid(void)
{
printk(BIOS_ERR, "ramstage cache invalid.\n");
if (IS_ENABLED(CONFIG_RESET_ON_INVALID_RAMSTAGE_CACHE)) {
hard_reset();
halt();
}
}
static void run_ramstage_from_resume(struct prog *ramstage)
{
if (!romstage_handoff_is_resume())
return;
/* Load the cached ramstage to runtime location. */
stage_cache_load_stage(STAGE_RAMSTAGE, ramstage);
if (prog_entry(ramstage) != NULL) {
printk(BIOS_DEBUG, "Jumping to image.\n");
prog_run(ramstage);
}
ramstage_cache_invalid();
}
static int load_relocatable_ramstage(struct prog *ramstage)
{
struct rmod_stage_load rmod_ram = {
.cbmem_id = CBMEM_ID_RAMSTAGE,
.prog = ramstage,
};
return rmodule_stage_load(&rmod_ram);
}
static int load_nonrelocatable_ramstage(struct prog *ramstage)
{
if (IS_ENABLED(CONFIG_HAVE_ACPI_RESUME)) {
uintptr_t base = 0;
size_t size = cbfs_prog_stage_section(ramstage, &base);
if (size)
backup_ramstage_section(base, size);
}
return cbfs_prog_stage_load(ramstage);
}
void run_ramstage(void)
{
struct prog ramstage =
PROG_INIT(PROG_RAMSTAGE, CONFIG_CBFS_PREFIX "/ramstage");
timestamp_add_now(TS_END_ROMSTAGE);
/*
* Only x86 systems using ramstage stage cache currently take the same
* firmware path on resume.
*/
if (IS_ENABLED(CONFIG_ARCH_X86) &&
!IS_ENABLED(CONFIG_NO_STAGE_CACHE) &&
IS_ENABLED(CONFIG_EARLY_CBMEM_INIT))
run_ramstage_from_resume(&ramstage);
if (prog_locate(&ramstage))
goto fail;
timestamp_add_now(TS_START_COPYRAM);
if (IS_ENABLED(CONFIG_RELOCATABLE_RAMSTAGE)) {
if (load_relocatable_ramstage(&ramstage))
goto fail;
} else if (load_nonrelocatable_ramstage(&ramstage))
goto fail;
stage_cache_add(STAGE_RAMSTAGE, &ramstage);
timestamp_add_now(TS_END_COPYRAM);
prog_run(&ramstage);
fail:
die("Ramstage was not loaded!\n");
}
#ifdef __RAMSTAGE__ // gc-sections should take care of this
static struct prog global_payload =
PROG_INIT(PROG_PAYLOAD, CONFIG_CBFS_PREFIX "/payload");
void __weak mirror_payload(struct prog *payload)
{
}
void payload_load(void)
{
struct prog *payload = &global_payload;
timestamp_add_now(TS_LOAD_PAYLOAD);
if (prog_locate(payload))
goto out;
mirror_payload(payload);
switch (prog_cbfs_type(payload)) {
case CBFS_TYPE_SELF: /* Simple ELF */
selfload(payload, true);
break;
case CBFS_TYPE_FIT: /* Flattened image tree */
if (IS_ENABLED(CONFIG_PAYLOAD_FIT_SUPPORT)) {
fit_payload(payload);
break;
} /* else fall-through */
default:
die("Unsupported payload type.\n");
break;
}
out:
if (prog_entry(payload) == NULL)
die("Payload not loaded.\n");
}
void payload_run(void)
{
struct prog *payload = &global_payload;
/* Reset to booting from this image as late as possible */
boot_successful();
printk(BIOS_DEBUG, "Jumping to boot code at %p(%p)\n",
prog_entry(payload), prog_entry_arg(payload));
post_code(POST_ENTER_ELF_BOOT);
timestamp_add_now(TS_SELFBOOT_JUMP);
/* Before we go off to run the payload, see if
* we stayed within our bounds.
*/
checkstack(_estack, 0);
prog_run(payload);
}
#endif
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