diff options
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/apollolake/systemagent.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/systemagent.c b/src/soc/intel/apollolake/systemagent.c index 22d801e018..57de4b82fb 100644 --- a/src/soc/intel/apollolake/systemagent.c +++ b/src/soc/intel/apollolake/systemagent.c @@ -16,7 +16,10 @@ * GNU General Public License for more details. */ +#include <cpu/cpu.h> +#include <console/console.h> #include <device/device.h> +#include <fsp/util.h> #include <intelblocks/systemagent.h> #include <soc/iomap.h> #include <soc/systemagent.h> @@ -38,3 +41,47 @@ void soc_add_fixed_mmio_resources(struct device *dev, int *index) sa_add_fixed_mmio_resources(dev, index, soc_fixed_resources, ARRAY_SIZE(soc_fixed_resources)); } + +int soc_get_uncore_prmmr_base_and_mask(uint64_t *prmrr_base, + uint64_t *prmrr_mask) +{ + const void *hob; + size_t hob_size, prmrr_size; + uint64_t phys_address_mask; + const uint8_t prmrr_phys_base_guid[16] = { + 0x38, 0x3a, 0x81, 0x9f, 0xb0, 0x6f, 0xa7, 0x4f, + 0xaf, 0x79, 0x8a, 0x4e, 0x74, 0xdd, 0x48, 0x33 + }; + const uint8_t prmrr_size_guid[16] = { + 0x44, 0xed, 0x0b, 0x99, 0x4e, 0x9b, 0x26, 0x42, + 0xa5, 0x97, 0x28, 0x36, 0x76, 0x6b, 0x5c, 0x41 + }; + + hob = fsp_find_extension_hob_by_guid(prmrr_phys_base_guid, + &hob_size); + if (!hob) { + printk(BIOS_ERR, "Failed to locate PRMRR base hob\n"); + return -1; + } + if (hob_size != sizeof(uint64_t)) { + printk(BIOS_ERR, "Incorrect PRMRR base hob size\n"); + return -1; + } + *prmrr_base = *(uint64_t *) hob; + + hob = fsp_find_extension_hob_by_guid(prmrr_size_guid, + &hob_size); + if (!hob) { + printk(BIOS_ERR, "Failed to locate PRMRR size hob\n"); + return -1; + } + if (hob_size != sizeof(uint64_t)) { + printk(BIOS_ERR, "Incorrect PRMRR base hob size\n"); + return -1; + } + prmrr_size = *(uint64_t *) hob; + phys_address_mask = (1ULL << cpu_phys_address_size()) - 1; + *prmrr_mask = phys_address_mask & ~(uint64_t)(prmrr_size - 1); + + return 0; +} |