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/* SPDX-License-Identifier: GPL-2.0-only */
#include <amdblocks/reset.h>
#include <console/cbmem_console.h>
#include <console/console.h>
#include <pc80/mc146818rtc.h>
#include <psp_verstage/psp_transfer.h>
#include <security/vboot/vbnv.h>
#include <security/vboot/symbols.h>
#include <2struct.h>
DECLARE_REGION(cbmemc_transfer)
int transfer_buffer_valid(const struct transfer_info_struct *ptr)
{
if (ptr->magic_val == TRANSFER_MAGIC_VAL && ptr->struct_bytes == sizeof(*ptr))
return 1;
else
return 0;
}
void verify_psp_transfer_buf(void)
{
if (*(uint32_t *)_vboot2_work == VB2_SHARED_DATA_MAGIC) {
cmos_write(0x00, CMOS_RECOVERY_BYTE);
return;
}
/*
* If CMOS is valid and the system has already been rebooted once, but
* still returns here, instead of rebooting to verstage again, assume
* that the system is in a reboot loop and halt.
*/
if ((!vbnv_cmos_failed()) && cmos_read(CMOS_RECOVERY_BYTE) ==
CMOS_RECOVERY_MAGIC_VAL)
die("Error: Reboot into recovery was unsuccessful. Halting.");
printk(BIOS_ERR, "VBOOT workbuf not valid.\n");
printk(BIOS_DEBUG, "Signature: %#08x\n", *(uint32_t *)_vboot2_work);
cmos_init(0);
cmos_write(CMOS_RECOVERY_MAGIC_VAL, CMOS_RECOVERY_BYTE);
warm_reset();
}
void show_psp_transfer_info(void)
{
struct transfer_info_struct *info = (struct transfer_info_struct *)
(void *)(uintptr_t)_transfer_buffer;
if (transfer_buffer_valid(info)) {
if ((info->psp_info & PSP_INFO_VALID) == 0) {
printk(BIOS_INFO, "No PSP info found in transfer buffer.\n");
return;
}
printk(BIOS_INFO, "PSP boot mode: %s\n",
info->psp_info & PSP_INFO_PRODUCTION_MODE ?
"Production" : "Development");
}
}
void replay_transfer_buffer_cbmemc(void)
{
const struct transfer_info_struct *info = (const struct transfer_info_struct *)
(void *)(uintptr_t)_transfer_buffer;
void *cbmemc;
size_t cbmemc_size;
if (!transfer_buffer_valid(info))
return;
if (info->console_offset < sizeof(*info))
return;
if (info->timestamp_offset <= info->console_offset)
return;
cbmemc_size = info->timestamp_offset - info->console_offset;
if (info->console_offset + cbmemc_size > info->buffer_size)
return;
cbmemc = (void *)((uintptr_t)info + info->console_offset);
/* Verify the cbmemc transfer buffer is where we expect it to be. */
if ((void *)_cbmemc_transfer != (void *)cbmemc)
return;
if (REGION_SIZE(cbmemc_transfer) != cbmemc_size)
return;
/* We need to manually initialize cbmemc so we can fill the new buffer. cbmemc_init()
* will also be called later in console_hw_init(), but it will be a no-op. */
cbmemc_init();
cbmemc_copy_in(cbmemc, cbmemc_size);
}
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