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