| Marshall Dawson | eb72487 | 2019-07-16 15:46:35 -0600 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | |
| 3 | #include <acpi/acpigen.h> |
| 4 | #include <cbmem.h> |
| 5 | #include <console/console.h> |
| 6 | #include <cpu/amd/msr.h> |
| 7 | #include <cpu/amd/mtrr.h> |
| 8 | #include <device/device.h> |
| 9 | #include <device/pci.h> |
| 10 | #include <device/pci_ids.h> |
| 11 | #include <fsp/util.h> |
| 12 | #include <stdint.h> |
| 13 | |
| 14 | static void read_resources(struct device *dev) |
| 15 | { |
| 16 | uint32_t mem_usable = (uintptr_t)cbmem_top(); |
| 17 | unsigned int idx = 0; |
| 18 | const struct hob_header *hob = fsp_get_hob_list(); |
| 19 | const struct hob_resource *res; |
| 20 | |
| 21 | /* 0x0 - 0x9ffff */ |
| 22 | ram_resource(dev, idx++, 0, 0xa0000 / KiB); |
| 23 | |
| 24 | /* 0xa0000 - 0xbffff: legacy VGA */ |
| 25 | mmio_resource(dev, idx++, 0xa0000 / KiB, 0x20000 / KiB); |
| 26 | |
| 27 | /* 0xc0000 - 0xfffff: Option ROM */ |
| 28 | reserved_ram_resource(dev, idx++, 0xc0000 / KiB, 0x40000 / KiB); |
| 29 | |
| 30 | /* 1MB to top of low usable RAM */ |
| 31 | ram_resource(dev, idx++, 1 * MiB / KiB, (mem_usable - 1 * MiB) / KiB); |
| 32 | |
| 33 | mmconf_resource(dev, MMIO_CONF_BASE); |
| 34 | |
| 35 | if (!hob) { |
| 36 | printk(BIOS_ERR, "Error: %s incomplete because no HOB list was found\n", |
| 37 | __func__); |
| 38 | return; |
| 39 | } |
| 40 | |
| 41 | for (; hob->type != HOB_TYPE_END_OF_HOB_LIST; hob = fsp_next_hob(hob)) { |
| 42 | |
| 43 | if (hob->type != HOB_TYPE_RESOURCE_DESCRIPTOR) |
| 44 | continue; |
| 45 | |
| 46 | res = fsp_hob_header_to_resource(hob); |
| 47 | |
| 48 | if (res->type == EFI_RESOURCE_SYSTEM_MEMORY && res->addr < mem_usable) |
| 49 | continue; /* 0 through low usable was set above */ |
| 50 | if (res->type == EFI_RESOURCE_MEMORY_MAPPED_IO) |
| 51 | continue; /* Done separately */ |
| 52 | |
| 53 | if (res->type == EFI_RESOURCE_SYSTEM_MEMORY) |
| 54 | ram_resource(dev, idx++, res->addr / KiB, res->length / KiB); |
| 55 | else if (res->type == EFI_RESOURCE_MEMORY_RESERVED) |
| 56 | reserved_ram_resource(dev, idx++, res->addr / KiB, res->length / KiB); |
| 57 | else |
| 58 | printk(BIOS_ERR, "Error: failed to set resources for type %d\n", |
| 59 | res->type); |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | /* Used by \_SB.PCI0._CRS */ |
| 64 | static void root_complex_fill_ssdt(const struct device *device) |
| 65 | { |
| 66 | msr_t msr; |
| 67 | |
| 68 | acpigen_write_scope(acpi_device_scope(device)); |
| 69 | |
| 70 | msr = rdmsr(TOP_MEM); |
| 71 | acpigen_write_name_dword("TOM1", msr.lo); |
| 72 | msr = rdmsr(TOP_MEM2); |
| 73 | /* |
| 74 | * Since XP only implements parts of ACPI 2.0, we can't use a qword |
| 75 | * here. |
| 76 | * See http://www.acpi.info/presentations/S01USMOBS169_OS%2520new.ppt |
| 77 | * slide 22ff. |
| 78 | * Shift value right by 20 bit to make it fit into 32bit, |
| 79 | * giving us 1MB granularity and a limit of almost 4Exabyte of memory. |
| 80 | */ |
| 81 | acpigen_write_name_dword("TOM2", (msr.hi << 12) | msr.lo >> 20); |
| 82 | acpigen_pop_len(); |
| 83 | } |
| 84 | |
| 85 | static struct device_operations root_complex_operations = { |
| 86 | .read_resources = read_resources, |
| 87 | .enable_resources = pci_dev_enable_resources, |
| 88 | .acpi_fill_ssdt = root_complex_fill_ssdt, |
| 89 | }; |
| 90 | |
| 91 | static const struct pci_driver family17_root_complex __pci_driver = { |
| 92 | .ops = &root_complex_operations, |
| 93 | .vendor = PCI_VENDOR_ID_AMD, |
| 94 | .device = PCI_DEVICE_ID_AMD_17H_MODEL_101F_NB, |
| 95 | }; |