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/* SPDX-License-Identifier: GPL-2.0-only */
#include <stdlib.h>
#include <cbfs.h>
#include <cbmem.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 <stage_cache.h>
#include <symbols.h>
#include <timestamp.h>
#include <fit_payload.h>
#include <security/vboot/vboot_common.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;
if (prog_locate_hook(prog))
return -1;
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");
vboot_run_logic();
if (ENV_X86 && CONFIG(BOOTBLOCK_NORMAL)) {
if (legacy_romstage_selector(&romstage))
goto fail;
} else {
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);
console_time_report();
prog_run(&romstage);
fail:
if (CONFIG(BOOTBLOCK_CONSOLE))
die_with_post_code(POST_INVALID_ROM,
"Couldn't load romstage.\n");
halt();
}
int __weak prog_locate_hook(struct prog *prog) { return 0; }
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);
prog_set_arg(ramstage, cbmem_top());
if (prog_entry(ramstage) != NULL) {
printk(BIOS_DEBUG, "Jumping to image.\n");
prog_run(ramstage);
}
printk(BIOS_ERR, "ramstage cache invalid.\n");
board_reset();
}
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);
}
void run_ramstage(void)
{
struct prog ramstage =
PROG_INIT(PROG_RAMSTAGE, CONFIG_CBFS_PREFIX "/ramstage");
if (ENV_POSTCAR)
timestamp_add_now(TS_END_POSTCAR);
/* Call "end of romstage" here if postcar stage doesn't exist */
if (ENV_ROMSTAGE)
timestamp_add_now(TS_END_ROMSTAGE);
/*
* Only x86 systems using ramstage stage cache currently take the same
* firmware path on resume.
*/
if (ENV_X86 && !CONFIG(NO_STAGE_CACHE))
run_ramstage_from_resume(&ramstage);
vboot_run_logic();
if (prog_locate(&ramstage))
goto fail;
timestamp_add_now(TS_START_COPYRAM);
if (ENV_X86 && load_relocatable_ramstage(&ramstage))
goto fail;
else if (cbfs_prog_stage_load(&ramstage))
goto fail;
stage_cache_add(STAGE_RAMSTAGE, &ramstage);
timestamp_add_now(TS_END_COPYRAM);
console_time_report();
/* This overrides the arg fetched from the relocatable module */
prog_set_arg(&ramstage, cbmem_top());
prog_run(&ramstage);
fail:
die_with_post_code(POST_INVALID_ROM, "Ramstage was not loaded!\n");
}
#if ENV_PAYLOAD_LOADER // gc-sections should take care of this
static struct prog global_payload =
PROG_INIT(PROG_PAYLOAD, CONFIG_CBFS_PREFIX "/payload");
void payload_load(void)
{
struct prog *payload = &global_payload;
timestamp_add_now(TS_LOAD_PAYLOAD);
if (prog_locate(payload))
goto out;
switch (prog_cbfs_type(payload)) {
case CBFS_TYPE_SELF: /* Simple ELF */
selfload_check(payload, BM_MEM_RAM);
break;
case CBFS_TYPE_FIT: /* Flattened image tree */
if (CONFIG(PAYLOAD_FIT_SUPPORT)) {
fit_payload(payload);
break;
} /* else fall-through */
default:
die_with_post_code(POST_INVALID_ROM,
"Unsupported payload type.\n");
break;
}
out:
if (prog_entry(payload) == NULL)
die_with_post_code(POST_INVALID_ROM, "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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