| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| |
| #include <baseboard/variants.h> |
| #include <bootblock_common.h> |
| #include <console/console.h> |
| #include <fmap.h> |
| #include <commonlib/region.h> |
| #include <cpu/intel/cpu_ids.h> |
| #include <intelblocks/pmclib.h> |
| #include <cf9_reset.h> |
| |
| #define SI_DESC_REGION "SI_DESC" |
| #define SI_DESC_REGION_SZ 4096 |
| #define PMC_DESC_7_BYTE3 0xc32 |
| |
| /* It updates PMC Descriptor in the Descriptor Region */ |
| static void configure_pmc_descriptor(void) |
| { |
| uint8_t si_desc_buf[SI_DESC_REGION_SZ]; |
| struct region_device desc_rdev; |
| |
| if (fmap_locate_area_as_rdev_rw(SI_DESC_REGION, &desc_rdev) < 0) { |
| printk(BIOS_ERR, "Failed to locate %s in the FMAP\n", SI_DESC_REGION); |
| return; |
| } |
| |
| if (rdev_readat(&desc_rdev, si_desc_buf, 0, SI_DESC_REGION_SZ) != SI_DESC_REGION_SZ) { |
| printk(BIOS_ERR, "Failed to read Descriptor Region from SPI Flash\n"); |
| return; |
| } |
| |
| if (si_desc_buf[PMC_DESC_7_BYTE3] == 0x40) { |
| si_desc_buf[PMC_DESC_7_BYTE3] = 0x44; |
| |
| if (rdev_eraseat(&desc_rdev, 0, SI_DESC_REGION_SZ) != SI_DESC_REGION_SZ) { |
| printk(BIOS_ERR, "Failed to erase Descriptor Region area\n"); |
| return; |
| } |
| |
| if (rdev_writeat(&desc_rdev, si_desc_buf, 0, SI_DESC_REGION_SZ) |
| != SI_DESC_REGION_SZ) { |
| printk(BIOS_ERR, "Failed to update Descriptor Region\n"); |
| return; |
| } |
| |
| printk(BIOS_DEBUG, "Update of PMC Descriptor successful, trigger GLOBAL RESET\n"); |
| |
| pmc_global_reset_enable(1); |
| do_full_reset(); |
| die("Failed to trigger GLOBAL RESET\n"); |
| } |
| |
| printk(BIOS_DEBUG, "Update of PMC Descriptor is not required!\n"); |
| } |
| |
| void bootblock_mainboard_early_init(void) |
| { |
| const struct pad_config *pads; |
| size_t num; |
| pads = variant_early_gpio_table(&num); |
| gpio_configure_pads(pads, num); |
| } |
| |
| void bootblock_mainboard_init(void) |
| { |
| if (cpu_get_cpuid() == CPUID_ALDERLAKE_A0) |
| configure_pmc_descriptor(); |
| } |