| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <acpi/acpigen.h> |
| #include <cbmem.h> |
| #include <console/console.h> |
| #include <cpu/amd/msr.h> |
| #include <cpu/amd/mtrr.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <fsp/util.h> |
| #include <stdint.h> |
| |
| static void read_resources(struct device *dev) |
| { |
| uint32_t mem_usable = (uintptr_t)cbmem_top(); |
| unsigned int idx = 0; |
| const struct hob_header *hob = fsp_get_hob_list(); |
| const struct hob_resource *res; |
| |
| /* 0x0 - 0x9ffff */ |
| ram_resource(dev, idx++, 0, 0xa0000 / KiB); |
| |
| /* 0xa0000 - 0xbffff: legacy VGA */ |
| mmio_resource(dev, idx++, 0xa0000 / KiB, 0x20000 / KiB); |
| |
| /* 0xc0000 - 0xfffff: Option ROM */ |
| reserved_ram_resource(dev, idx++, 0xc0000 / KiB, 0x40000 / KiB); |
| |
| /* 1MB to top of low usable RAM */ |
| ram_resource(dev, idx++, 1 * MiB / KiB, (mem_usable - 1 * MiB) / KiB); |
| |
| mmconf_resource(dev, MMIO_CONF_BASE); |
| |
| if (!hob) { |
| printk(BIOS_ERR, "Error: %s incomplete because no HOB list was found\n", |
| __func__); |
| return; |
| } |
| |
| for (; hob->type != HOB_TYPE_END_OF_HOB_LIST; hob = fsp_next_hob(hob)) { |
| |
| if (hob->type != HOB_TYPE_RESOURCE_DESCRIPTOR) |
| continue; |
| |
| res = fsp_hob_header_to_resource(hob); |
| |
| if (res->type == EFI_RESOURCE_SYSTEM_MEMORY && res->addr < mem_usable) |
| continue; /* 0 through low usable was set above */ |
| if (res->type == EFI_RESOURCE_MEMORY_MAPPED_IO) |
| continue; /* Done separately */ |
| |
| if (res->type == EFI_RESOURCE_SYSTEM_MEMORY) |
| ram_resource(dev, idx++, res->addr / KiB, res->length / KiB); |
| else if (res->type == EFI_RESOURCE_MEMORY_RESERVED) |
| reserved_ram_resource(dev, idx++, res->addr / KiB, res->length / KiB); |
| else |
| printk(BIOS_ERR, "Error: failed to set resources for type %d\n", |
| res->type); |
| } |
| } |
| |
| /* Used by \_SB.PCI0._CRS */ |
| static void root_complex_fill_ssdt(const struct device *device) |
| { |
| msr_t msr; |
| |
| acpigen_write_scope(acpi_device_scope(device)); |
| |
| msr = rdmsr(TOP_MEM); |
| acpigen_write_name_dword("TOM1", msr.lo); |
| msr = rdmsr(TOP_MEM2); |
| /* |
| * Since XP only implements parts of ACPI 2.0, we can't use a qword |
| * here. |
| * See http://www.acpi.info/presentations/S01USMOBS169_OS%2520new.ppt |
| * slide 22ff. |
| * Shift value right by 20 bit to make it fit into 32bit, |
| * giving us 1MB granularity and a limit of almost 4Exabyte of memory. |
| */ |
| acpigen_write_name_dword("TOM2", (msr.hi << 12) | msr.lo >> 20); |
| acpigen_pop_len(); |
| } |
| |
| static struct device_operations root_complex_operations = { |
| .read_resources = read_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .acpi_fill_ssdt = root_complex_fill_ssdt, |
| }; |
| |
| static const struct pci_driver family17_root_complex __pci_driver = { |
| .ops = &root_complex_operations, |
| .vendor = PCI_VENDOR_ID_AMD, |
| .device = PCI_DEVICE_ID_AMD_17H_MODEL_101F_NB, |
| }; |