| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| |
| #include <cbmem.h> |
| #include <console/console.h> |
| #include <cpu/x86/lapic_def.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <soc/iomap.h> |
| #include <soc/pci_devs.h> |
| #include <soc/ramstage.h> |
| #include <soc/util.h> |
| #include <fsp/util.h> |
| |
| struct map_entry { |
| uint32_t reg; |
| int is_64_bit; |
| int is_limit; |
| int mask_bits; |
| const char *description; |
| }; |
| |
| enum { |
| TOHM_REG, |
| MMIOL_REG, |
| MMCFG_BASE_REG, |
| MMCFG_LIMIT_REG, |
| TOLM_REG, |
| ME_BASE_REG, |
| ME_LIMIT_REG, |
| TSEG_BASE_REG, |
| TSEG_LIMIT_REG, |
| /* Must be last. */ |
| NUM_MAP_ENTRIES |
| }; |
| |
| static struct map_entry memory_map[NUM_MAP_ENTRIES] = { |
| [TOHM_REG] = MAP_ENTRY_LIMIT_64(VTD_TOHM_CSR, 26, "TOHM"), |
| [MMIOL_REG] = MAP_ENTRY_BASE_32(VTD_MMIOL_CSR, "MMIOL"), |
| [MMCFG_BASE_REG] = MAP_ENTRY_BASE_64(VTD_MMCFG_BASE_CSR, "MMCFG_BASE"), |
| [MMCFG_LIMIT_REG] = MAP_ENTRY_LIMIT_64(VTD_MMCFG_LIMIT_CSR, 26, "MMCFG_LIMIT"), |
| [TOLM_REG] = MAP_ENTRY_LIMIT_32(VTD_TOLM_CSR, 26, "TOLM"), |
| [ME_BASE_REG] = MAP_ENTRY_BASE_64(VTD_ME_BASE_CSR, "ME_BASE"), |
| [ME_LIMIT_REG] = MAP_ENTRY_LIMIT_64(VTD_ME_LIMIT_CSR, 19, "ME_LIMIT"), |
| [TSEG_BASE_REG] = MAP_ENTRY_BASE_32(VTD_TSEG_BASE_CSR, "TSEGMB_BASE"), |
| [TSEG_LIMIT_REG] = MAP_ENTRY_LIMIT_32(VTD_TSEG_LIMIT_CSR, 20, "TSEGMB_LIMIT"), |
| }; |
| |
| static void read_map_entry(struct device *dev, struct map_entry *entry, |
| uint64_t *result) |
| { |
| uint64_t value; |
| uint64_t mask; |
| |
| /* All registers are on a 1MiB granularity. */ |
| mask = ((1ULL << entry->mask_bits) - 1); |
| mask = ~mask; |
| |
| value = 0; |
| |
| if (entry->is_64_bit) { |
| value = pci_read_config32(dev, entry->reg + sizeof(uint32_t)); |
| value <<= 32; |
| } |
| |
| value |= (uint64_t)pci_read_config32(dev, entry->reg); |
| value &= mask; |
| |
| if (entry->is_limit) |
| value |= ~mask; |
| |
| *result = value; |
| } |
| |
| static void mc_read_map_entries(struct device *dev, uint64_t *values) |
| { |
| int i; |
| for (i = 0; i < NUM_MAP_ENTRIES; i++) |
| read_map_entry(dev, &memory_map[i], &values[i]); |
| } |
| |
| static void mc_report_map_entries(struct device *dev, uint64_t *values) |
| { |
| int i; |
| for (i = 0; i < NUM_MAP_ENTRIES; i++) { |
| printk(BIOS_DEBUG, "MC MAP: %s: 0x%llx\n", |
| memory_map[i].description, values[i]); |
| } |
| } |
| |
| /* |
| * Host Memory Map: |
| * |
| * +--------------------------+ TOCM (2 pow 46 - 1) |
| * | Reserved | |
| * +--------------------------+ |
| * | MMIOH (relocatable) | |
| * +--------------------------+ |
| * | PCISeg | |
| * +--------------------------+ TOHM |
| * | High DRAM Memory | |
| * +--------------------------+ 4GiB (0x100000000) |
| * +--------------------------+ 0xFFFF_FFFF |
| * | Firmware | |
| * +--------------------------+ 0xFF00_0000 |
| * | Reserved | |
| * +--------------------------+ 0xFEF0_0000 |
| * | Local xAPIC | |
| * +--------------------------+ 0xFEE0_0000 |
| * | HPET/LT/TPM/Others | |
| * +--------------------------+ 0xFED0_0000 |
| * | I/O xAPIC | |
| * +--------------------------+ 0xFEC0_0000 |
| * | Reserved | |
| * +--------------------------+ 0xFEB8_0000 |
| * | Reserved | |
| * +--------------------------+ 0xFEB0_0000 |
| * | Reserved | |
| * +--------------------------+ 0xFE00_0000 |
| * | MMIOL (relocatable) | |
| * | P2SB PCR cfg BAR | (0xfd000000 - 0xfdffffff |
| * | BAR space | [mem 0x90000000-0xfcffffff] available for PCI devices |
| * +--------------------------+ 0x9000_0000 |
| * |PCIe MMCFG (relocatable) | CONFIG_MMCONF_BASE_ADDRESS 64 or 256MB |
| * | | (0x80000000 - 0x8fffffff, 0x40000) |
| * +--------------------------+ TOLM |
| * | MEseg (relocatable) | 32, 64, 128 or 256 MB (0x78000000 - 0x7fffffff, 0x20000) |
| * +--------------------------+ |
| * | Tseg (relocatable) | N x 8MB (0x70000000 - 0x77ffffff, 0x20000) |
| * +--------------------------+ cbmem_top |
| * | Reserved - CBMEM | (0x6fffe000 - 0x6fffffff, 0x2000) |
| * +--------------------------+ |
| * | Reserved - FSP | (0x6fbfe000 - 0x6fffdfff, 0x400000) |
| * +--------------------------+ top_of_ram (0x6fbfdfff) |
| * | Low DRAM Memory | |
| * +--------------------------+ FFFFF (1MB) |
| * | E & F segments | |
| * +--------------------------+ E0000 |
| * | C & D segments | |
| * +--------------------------+ C0000 |
| * | VGA & SMM Memory | |
| * +--------------------------+ A0000 |
| * | Conventional Memory | |
| * | (DOS Range) | |
| * +--------------------------+ 0 |
| */ |
| |
| static void mc_add_dram_resources(struct device *dev, int *res_count) |
| { |
| struct range_entry fsp_mem; |
| uint64_t base_kb; |
| uint64_t size_kb; |
| uint64_t top_of_ram; |
| uint64_t mc_values[NUM_MAP_ENTRIES]; |
| struct resource *resource; |
| int index = *res_count; |
| |
| fsp_find_reserved_memory(&fsp_mem); |
| |
| /* Read in the MAP registers and report their values. */ |
| mc_read_map_entries(dev, &mc_values[0]); |
| mc_report_map_entries(dev, &mc_values[0]); |
| |
| top_of_ram = range_entry_base(&fsp_mem) - 1; |
| printk(BIOS_SPEW, "cbmem_top: 0x%lx, fsp range: [0x%llx - 0x%llx], top_of_ram: 0x%llx\n", |
| (uintptr_t) cbmem_top(), range_entry_base(&fsp_mem), |
| range_entry_end(&fsp_mem), top_of_ram); |
| |
| /* Conventional Memory (DOS region, 0x0 to 0x9FFFF) */ |
| base_kb = 0; |
| size_kb = (0xa0000 >> 10); |
| LOG_MEM_RESOURCE("legacy_ram", dev, index, base_kb, size_kb); |
| ram_resource(dev, index++, base_kb, size_kb); |
| |
| /* 1MB -> top_of_ram i.e., fsp_mem_base+1*/ |
| base_kb = (0x100000 >> 10); |
| size_kb = (top_of_ram - 0xfffff) >> 10; |
| LOG_MEM_RESOURCE("low_ram", dev, index, base_kb, size_kb); |
| ram_resource(dev, index++, base_kb, size_kb); |
| |
| /* |
| * FSP meomoy, CBMem regions are already added as reserved |
| * Add TSEG and MESEG Regions as reserved memory |
| * src/drivers/intel/fsp2_0/memory_init.c sets CBMEM reserved size |
| * arch_upd->BootLoaderTolumSize = cbmem_overhead_size(); == 2 * CBMEM_ROOT_MIN_SIZE |
| * typically 0x2000 |
| * Example config: |
| * FSP_RESERVED_MEMORY_RESOURCE_HOB |
| * FspReservedMemoryResource Base : 6FBFE000 |
| * FspReservedMemoryResource Size : 400000 |
| * FSP_BOOT_LOADER_TOLUM_HOB |
| * FspBootLoaderTolum Base : 6FFFE000 |
| * FspBootLoaderTolum Size : 2000 |
| */ |
| |
| /* Mark TSEG/SMM region as reserved */ |
| base_kb = (mc_values[TSEG_BASE_REG] >> 10); |
| size_kb = (mc_values[TSEG_LIMIT_REG] - mc_values[TSEG_BASE_REG] + 1) >> 10; |
| LOG_MEM_RESOURCE("mmio_tseg", dev, index, base_kb, size_kb); |
| reserved_ram_resource(dev, index++, base_kb, size_kb); |
| |
| /* Mark region between TSEG - TOLM (eg. MESEG) as reserved */ |
| if (mc_values[TSEG_LIMIT_REG] < mc_values[TOLM_REG]) { |
| base_kb = ((mc_values[TSEG_LIMIT_REG] + 1) >> 10); |
| size_kb = (mc_values[TOLM_REG] - mc_values[TSEG_LIMIT_REG]) >> 10; |
| LOG_MEM_RESOURCE("mmio_tolm", dev, index, base_kb, size_kb); |
| reserved_ram_resource(dev, index++, base_kb, size_kb); |
| } |
| |
| /* 4GiB -> TOHM */ |
| if (mc_values[TOHM_REG] > 0x100000000) { |
| base_kb = (0x100000000 >> 10); |
| size_kb = (mc_values[TOHM_REG] - 0x100000000 + 1) >> 10; |
| LOG_MEM_RESOURCE("high_ram", dev, index, base_kb, size_kb); |
| ram_resource(dev, index++, base_kb, size_kb); |
| } |
| |
| /* add MMIO CFG resource */ |
| resource = new_resource(dev, index++); |
| resource->base = (resource_t) mc_values[MMCFG_BASE_REG]; |
| resource->size = (resource_t) (mc_values[MMCFG_LIMIT_REG] - |
| mc_values[MMCFG_BASE_REG] + 1); |
| resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE | |
| IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; |
| LOG_MEM_RESOURCE("mmiocfg_res", dev, index-1, (resource->base >> 10), |
| (resource->size >> 10)); |
| |
| /* add Local APIC resource */ |
| resource = new_resource(dev, index++); |
| resource->base = LAPIC_DEFAULT_BASE; |
| resource->size = 0x00001000; |
| resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE | |
| IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; |
| LOG_MEM_RESOURCE("apic_res", dev, index-1, (resource->base >> 10), |
| (resource->size >> 10)); |
| |
| /* |
| * Add legacy region as reserved - 0xa000 - 1MB |
| * Reserve everything between A segment and 1MB: |
| * |
| * 0xa0000 - 0xbffff: legacy VGA |
| * 0xc0000 - 0xfffff: RAM |
| */ |
| base_kb = VGA_BASE_ADDRESS >> 10; |
| size_kb = VGA_BASE_SIZE >> 10; |
| LOG_MEM_RESOURCE("legacy_mmio", dev, index, base_kb, size_kb); |
| mmio_resource(dev, index++, base_kb, size_kb); |
| |
| base_kb = (0xc0000 >> 10); |
| size_kb = (0x100000 - 0xc0000) >> 10; |
| LOG_MEM_RESOURCE("legacy_write_protect", dev, index, base_kb, size_kb); |
| reserved_ram_resource(dev, index++, base_kb, size_kb); |
| |
| *res_count = index; |
| } |
| |
| static void mmapvtd_read_resources(struct device *dev) |
| { |
| int index = 0; |
| |
| /* Read standard PCI resources. */ |
| pci_dev_read_resources(dev); |
| |
| /* Calculate and add DRAM resources. */ |
| mc_add_dram_resources(dev, &index); |
| } |
| |
| static void mmapvtd_init(struct device *dev) |
| { |
| } |
| |
| static struct device_operations mmapvtd_ops = { |
| .read_resources = mmapvtd_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .init = mmapvtd_init, |
| .ops_pci = &soc_pci_ops, |
| }; |
| |
| static const unsigned short mmapvtd_ids[] = { |
| MMAP_VTD_CFG_REG_DEVID, /* Memory Map/IntelĀ® VT-d Configuration Registers */ |
| 0 |
| }; |
| |
| static const struct pci_driver mmapvtd_driver __pci_driver = { |
| .ops = &mmapvtd_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .devices = mmapvtd_ids |
| }; |