fixme.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <arch/hpet.h>
#include <cpu/x86/mtrr.h>
#include <cpu/amd/msr.h>
#include <cpu/amd/mtrr.h>
#include <northbridge/amd/agesa/agesa_helper.h>
#include <AGESA.h>
#include <amdlib.h>
 
void amd_initcpuio(void)
{
        UINT64                        MsrReg;
        UINT32                        PciData;
        PCI_ADDR                      PciAddress;
        AMD_CONFIG_PARAMS             StdHeader;
 
        /* Enable legacy video routing: D18F1xF4 VGA Enable */
        PciAddress.AddressValue = MAKE_SBDFO(0, 0, 0x18, 1, 0xF4);
        PciData = 1;
        LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
 
        /* The platform BIOS needs to ensure the memory ranges of Hudson legacy
         * devices (TPM, HPET, BIOS RAM, Watchdog Timer, I/O APIC and ACPI) are
         * set to non-posted regions.
         */
        PciAddress.AddressValue = MAKE_SBDFO(0, 0, 0x18, 1, 0x84);
        PciData = 0x00FEDF00; /* last address before processor local APIC at FEE00000 */
        PciData |= 1 << 7;    /* set NP (non-posted) bit */
        LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
        PciAddress.AddressValue = MAKE_SBDFO(0, 0, 0x18, 1, 0x80);
        PciData = (HPET_BASE_ADDRESS >> 8) | 3; /* lowest NP address is HPET at FED00000 */
        LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
 
        /* Map the remaining PCI hole as posted MMIO */
        PciAddress.AddressValue = MAKE_SBDFO(0, 0, 0x18, 1, 0x8C);
        PciData = 0x00FECF00; /* last address before non-posted range */
        LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
        LibAmdMsrRead(TOP_MEM, &MsrReg, &StdHeader);
        MsrReg = (MsrReg >> 8) | 3;
        PciAddress.AddressValue = MAKE_SBDFO(0, 0, 0x18, 1, 0x88);
        PciData = (UINT32)MsrReg;
        LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
 
        /* Send all IO (0000-FFFF) to southbridge. */
        PciAddress.AddressValue = MAKE_SBDFO(0, 0, 0x18, 1, 0xC4);
        PciData = 0x0000F000;
        LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
        PciAddress.AddressValue = MAKE_SBDFO(0, 0, 0x18, 1, 0xC0);
        PciData = 0x00000003;
        LibAmdPciWrite(AccessWidth32, PciAddress, &PciData, &StdHeader);
}