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/* 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,
};
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