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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <boot/coreboot_tables.h>
#include <device/mmio.h>
#include <cbfs.h>
#include <cf9_reset.h>
#include <commonlib/bsd/compression.h>
#include <commonlib/fsp.h>
#include <console/console.h>
#include <fsp/util.h>
#include <string.h>
#include <types.h>
static bool looks_like_fsp_header(const uint8_t *raw_hdr)
{
if (memcmp(raw_hdr, FSP_HDR_SIGNATURE, 4)) {
printk(BIOS_ALERT, "Did not find a valid FSP signature\n");
return false;
}
if (read32(raw_hdr + 4) != FSP_HDR_LEN) {
printk(BIOS_ALERT, "FSP header has invalid length\n");
return false;
}
return true;
}
enum cb_err fsp_identify(struct fsp_header *hdr, const void *fsp_blob)
{
const uint8_t *raw_hdr = fsp_blob;
if (!looks_like_fsp_header(raw_hdr))
return CB_ERR;
hdr->spec_version = read8(raw_hdr + 10);
hdr->revision = read8(raw_hdr + 11);
hdr->fsp_revision = read32(raw_hdr + 12);
memcpy(hdr->image_id, raw_hdr + 16, ARRAY_SIZE(hdr->image_id));
hdr->image_id[ARRAY_SIZE(hdr->image_id) - 1] = '\0';
hdr->image_size = read32(raw_hdr + 24);
hdr->image_base = read32(raw_hdr + 28);
hdr->image_attribute = read16(raw_hdr + 32);
hdr->component_attribute = read16(raw_hdr + 34);
hdr->cfg_region_offset = read32(raw_hdr + 36);
hdr->cfg_region_size = read32(raw_hdr + 40);
hdr->temp_ram_init_entry = read32(raw_hdr + 48);
hdr->temp_ram_exit_entry = read32(raw_hdr + 64);
hdr->notify_phase_entry_offset = read32(raw_hdr + 56);
hdr->memory_init_entry_offset = read32(raw_hdr + 60);
hdr->silicon_init_entry_offset = read32(raw_hdr + 68);
if (CONFIG(PLATFORM_USES_FSP2_2))
hdr->multi_phase_si_init_entry_offset = read32(raw_hdr + 72);
return CB_SUCCESS;
}
enum cb_err fsp_validate_component(struct fsp_header *hdr, void *fsp_file, size_t file_size)
{
void *raw_hdr = fsp_file + FSP_HDR_OFFSET;
if (file_size < FSP_HDR_OFFSET + FSP_HDR_LEN) {
printk(BIOS_CRIT, "FSP blob too small.\n");
return CB_ERR;
}
if (fsp_identify(hdr, raw_hdr) != CB_SUCCESS) {
printk(BIOS_CRIT, "No valid FSP header\n");
return CB_ERR;
}
if (CONFIG(DISPLAY_FSP_HEADER))
fsp_print_header_info(hdr);
/* Check if size specified in the header matches the cbfs file size */
if (file_size < hdr->image_size) {
printk(BIOS_CRIT, "Component size bigger than cbfs file.\n");
return CB_ERR;
}
if (ENV_ROMSTAGE)
soc_validate_fsp_version(hdr);
return CB_SUCCESS;
}
static bool fsp_reset_requested(uint32_t status)
{
return (status >= FSP_STATUS_RESET_REQUIRED_COLD &&
status <= FSP_STATUS_RESET_REQUIRED_8);
}
void fsp_handle_reset(uint32_t status)
{
if (!fsp_reset_requested(status))
return;
printk(BIOS_SPEW, "FSP: handling reset type %x\n", status);
switch (status) {
case FSP_STATUS_RESET_REQUIRED_COLD:
full_reset();
break;
case FSP_STATUS_RESET_REQUIRED_WARM:
system_reset();
break;
case FSP_STATUS_RESET_REQUIRED_3:
case FSP_STATUS_RESET_REQUIRED_4:
case FSP_STATUS_RESET_REQUIRED_5:
case FSP_STATUS_RESET_REQUIRED_6:
case FSP_STATUS_RESET_REQUIRED_7:
case FSP_STATUS_RESET_REQUIRED_8:
chipset_handle_reset(status);
break;
default:
break;
}
}
static inline bool fspm_env(void)
{
if (ENV_ROMSTAGE)
return true;
return false;
}
static inline bool fspm_xip(void)
{
/* FSP-M is assumed to be loaded in romstage. */
if (fspm_env() && CONFIG(FSP_M_XIP))
return true;
return false;
}
/* Load the FSP component described by fsp_load_descriptor from cbfs. The FSP
* header object will be validated and filled in on successful load. */
enum cb_err fsp_load_component(struct fsp_load_descriptor *fspld, struct fsp_header *hdr)
{
size_t output_size;
void *dest;
struct prog *fsp_prog = &fspld->fsp_prog;
dest = cbfs_alloc(prog_name(fsp_prog), fspld->alloc, fspld, &output_size);
if (!dest)
return CB_ERR;
/* Don't allow FSP-M relocation. */
if (!fspm_env() && fsp_component_relocate((uintptr_t)dest, dest, output_size) < 0) {
printk(BIOS_ERR, "Unable to relocate FSP component!\n");
return CB_ERR;
}
prog_set_area(fsp_prog, dest, output_size);
if (fsp_validate_component(hdr, dest, output_size) != CB_SUCCESS) {
printk(BIOS_ERR, "Invalid FSP header after load!\n");
return CB_ERR;
}
/* Signal that FSP component has been loaded. */
prog_segment_loaded(hdr->image_base, hdr->image_size, SEG_FINAL);
return CB_SUCCESS;
}
/* Only call this function when FSP header has been read and validated */
void fsp_get_version(char *buf)
{
struct fsp_header *hdr = &fsps_hdr;
union fsp_revision revision;
revision.val = hdr->fsp_revision;
snprintf(buf, FSP_VER_LEN, "%u.%u-%u.%u.%u.%u", (hdr->spec_version >> 4),
hdr->spec_version & 0xf, revision.rev.major,
revision.rev.minor, revision.rev.revision, revision.rev.bld_num);
}
/* Check if the signature in the UPD header matches the expected one. If it doesn't match, the
FSP binaries in CBFS are for a different platform than the platform code trying to use it
in which case the function calls die(). */
void fsp_verify_upd_header_signature(uint64_t upd_signature, uint64_t expected_signature)
{
if (upd_signature != expected_signature) {
/* The UPD signatures are non-zero-terminated ASCII stored as a little endian
uint64_t, so this needs some casts. */
die_with_post_code(POST_INVALID_VENDOR_BINARY,
"Invalid UPD signature! FSP provided \"%8s\", expected was \"%8s\".\n",
(char *)&upd_signature,
(char *)&expected_signature);
}
}
/* Add FSP version to coreboot table LB_TAG_PLATFORM_BLOB_VERSION */
void lb_string_platform_blob_version(struct lb_header *header)
{
struct lb_string *rec;
size_t len;
char fsp_version[FSP_VER_LEN] = {0};
fsp_get_version(fsp_version);
rec = (struct lb_string *)lb_new_record(header);
rec->tag = LB_TAG_PLATFORM_BLOB_VERSION;
len = strlen(fsp_version);
rec->size = ALIGN_UP(sizeof(*rec) + len + 1, 8);
memcpy(rec->string, fsp_version, len+1);
}
__weak void soc_validate_fsp_version(const struct fsp_header *hdr)
{
}
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