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/* SPDX-License-Identifier: GPL-2.0-only */
#include <console/console.h>
#include <fsp/api.h>
#include <fsp/util.h>
#include <soc/intel/common/reset.h>
#include <stdint.h>
static const uint8_t fsp_reset_guid[16] = {
0xff, 0x97, 0x05, 0xea, 0x58, 0x88, 0xca, 0x41,
0xbb, 0xc1, 0xfe, 0x18, 0xfc, 0xd2, 0x8e, 0x22
};
static const uint8_t fsp_global_reset_guid[16] = {
0x4c, 0x1b, 0xb3, 0x9d, 0xef, 0xf5, 0xbb, 0x48,
0x94, 0x2b, 0x18, 0x1f, 0x7e, 0x3a, 0x3e, 0x40
};
/* Platform Reset String as per Intel FSP is "PCH RESET" in unicode */
#define PLATFORM_RESET_STRING_LENGTH 20
struct pch_reset_data {
char reserved[PLATFORM_RESET_STRING_LENGTH];
efi_guid_t global_reset_uid;
};
/* This structure is used to provide information about PCH Reset */
struct fsp_reset_hob {
EFI_RESET_TYPE reset_type;
struct pch_reset_data reset_data;
};
void chipset_handle_reset(efi_return_status_t status)
{
if (status == CONFIG_FSP_STATUS_GLOBAL_RESET) {
printk(BIOS_DEBUG, "GLOBAL RESET!\n");
global_reset();
}
fsp_printk(status, BIOS_ERR, "unhandled reset type");
die("unknown reset type");
}
static uint32_t fsp_reset_type_to_status(EFI_RESET_TYPE reset_type)
{
efi_return_status_t status;
switch (reset_type) {
case EfiResetCold:
status = FSP_STATUS_RESET_REQUIRED_COLD;
break;
case EfiResetWarm:
status = FSP_STATUS_RESET_REQUIRED_WARM;
break;
default:
printk(BIOS_ERR, "unhandled reset type %x\n", reset_type);
die("unknown reset type");
}
return status;
}
/*
* Return PCH Reset Status
* The return status can be between EfiResetCold, EfiResetWarm, EfiResetShutdown
* or EfiResetPlatformSpecific.
*
* If reset type is `EfiResetPlatformSpecific` then relying on pch_reset_data structure
* to know if the reset type is a global reset.
*/
uint32_t fsp_get_pch_reset_status(void)
{
size_t size;
const struct fsp_reset_hob *hob = fsp_find_extension_hob_by_guid(fsp_reset_guid, &size);
if (!hob)
return 0;
if ((hob->reset_type == EfiResetPlatformSpecific) &&
fsp_guid_compare((void *)&(hob->reset_data.global_reset_uid),
fsp_global_reset_guid))
return CONFIG_FSP_STATUS_GLOBAL_RESET;
return fsp_reset_type_to_status(hob->reset_type);
}
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