diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mainboard/intel/adlrvp/bootblock.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/mainboard/intel/adlrvp/bootblock.c b/src/mainboard/intel/adlrvp/bootblock.c index eeee406f12..76fee80006 100644 --- a/src/mainboard/intel/adlrvp/bootblock.c +++ b/src/mainboard/intel/adlrvp/bootblock.c @@ -1,9 +1,95 @@ /* SPDX-License-Identifier: GPL-2.0-only */ +#include <arch/mmio.h> #include <baseboard/variants.h> #include <bootblock_common.h> +#include <cf9_reset.h> +#include <commonlib/region.h> +#include <console/console.h> +#include <fmap.h> +#include <intelblocks/mp_init.h> +#include <intelblocks/pmclib.h> + +#define SI_DESC_REGION "SI_DESC" +#define SI_DESC_REGION_SZ 4096 +#define PMC_DESC_7_BYTE3 0xc32 + +/* Flash Master 1 : HOST/BIOS */ +#define FLMSTR1 0x80 + +/* Flash signature Offset */ +#define FLASH_SIGN_OFFSET 0x10 +#define FLMSTR_WR_SHIFT_V2 20 +#define FLASH_VAL_SIGN 0xFF0A55A + +/* It checks whether host(Flash Master 1) has write access to the Descriptor Region or not */ +static int is_descriptor_writeable(uint8_t *desc) +{ + /* Check flash has valid signature */ + if (read32((void *)(desc + FLASH_SIGN_OFFSET)) != FLASH_VAL_SIGN) { + printk(BIOS_DEBUG, "Flash Descriptor is not valid\n"); + return 0; + } + + /* Check host has write access to the Descriptor Region */ + if (!((read32((void *)(desc + FLMSTR1)) >> FLMSTR_WR_SHIFT_V2) & BIT(0))) { + printk(BIOS_DEBUG, "Host doesn't have write access to Descriptor Region\n"); + return 0; + } + + return 1; +} + +/* 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 (!is_descriptor_writeable(si_desc_buf)) + return; + + if (si_desc_buf[PMC_DESC_7_BYTE3] != 0x40) { + printk(BIOS_DEBUG, "Update of PMC Descriptor is not required!\n"); + return; + } + + 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(true); + do_full_reset(); + die("Failed to trigger GLOBAL RESET\n"); +} void bootblock_mainboard_early_init(void) { variant_configure_early_gpio_pads(); } +void bootblock_mainboard_init(void) +{ + if (cpu_get_cpuid() == CPUID_ALDERLAKE_A0) + configure_pmc_descriptor(); +} |