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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <types.h>
#include <console/console.h>
#include <acpi/acpi.h>
#include <device/device.h>
#include <device/pci_ops.h>
#include "haswell.h"
#include <southbridge/intel/lynxpoint/pch.h>
unsigned long acpi_fill_mcfg(unsigned long current)
{
struct device *dev;
u32 pciexbar = 0;
u32 pciexbar_reg;
int max_buses;
u32 mask;
dev = pcidev_on_root(0, 0);
if (!dev)
return current;
pciexbar_reg = pci_read_config32(dev, PCIEXBAR);
/* MMCFG not supported or not enabled. */
if (!(pciexbar_reg & (1 << 0)))
return current;
mask = (1UL << 31) | (1 << 30) | (1 << 29) | (1 << 28);
switch ((pciexbar_reg >> 1) & 3) {
case 0: /* 256MB */
pciexbar = pciexbar_reg & mask;
max_buses = 256;
break;
case 1: /* 128M */
mask |= (1 << 27);
pciexbar = pciexbar_reg & mask;
max_buses = 128;
break;
case 2: /* 64M */
mask |= (1 << 27) | (1 << 26);
pciexbar = pciexbar_reg & mask;
max_buses = 64;
break;
default: /* RSVD */
return current;
}
if (!pciexbar)
return current;
current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *) current, pciexbar, 0, 0,
max_buses - 1);
return current;
}
static unsigned long acpi_fill_dmar(unsigned long current)
{
struct device *const igfx_dev = pcidev_on_root(2, 0);
const u32 gfxvtbar = MCHBAR32(GFXVTBAR) & ~0xfff;
const u32 vtvc0bar = MCHBAR32(VTVC0BAR) & ~0xfff;
const bool gfxvten = MCHBAR32(GFXVTBAR) & 0x1;
const bool vtvc0en = MCHBAR32(VTVC0BAR) & 0x1;
/* iGFX has to be enabled; GFXVTBAR set, enabled, in 32-bit space */
if (igfx_dev && igfx_dev->enabled && gfxvtbar && gfxvten && !MCHBAR32(GFXVTBAR + 4)) {
const unsigned long tmp = current;
current += acpi_create_dmar_drhd(current, 0, 0, gfxvtbar);
current += acpi_create_dmar_ds_pci(current, 0, 2, 0);
acpi_dmar_drhd_fixup(tmp, current);
}
/* VTVC0BAR has to be set, enabled, and in 32-bit space */
if (vtvc0bar && vtvc0en && !MCHBAR32(VTVC0BAR + 4)) {
const unsigned long tmp = current;
current += acpi_create_dmar_drhd(current, DRHD_INCLUDE_PCI_ALL, 0, vtvc0bar);
current += acpi_create_dmar_ds_ioapic(current, 2, PCH_IOAPIC_PCI_BUS,
PCH_IOAPIC_PCI_SLOT, 0);
size_t i;
for (i = 0; i < 8; ++i)
current += acpi_create_dmar_ds_msi_hpet(current, 0, PCH_HPET_PCI_BUS,
PCH_HPET_PCI_SLOT, i);
acpi_dmar_drhd_fixup(tmp, current);
}
return current;
}
unsigned long northbridge_write_acpi_tables(const struct device *const dev,
unsigned long current,
struct acpi_rsdp *const rsdp)
{
/* Create DMAR table only if we have VT-d capability. */
const u32 capid0_a = pci_read_config32(dev, CAPID0_A);
if (capid0_a & VTD_DISABLE)
return current;
acpi_dmar_t *const dmar = (acpi_dmar_t *)current;
printk(BIOS_DEBUG, "ACPI: * DMAR\n");
acpi_create_dmar(dmar, DMAR_INTR_REMAP, acpi_fill_dmar);
current += dmar->header.length;
current = acpi_align_current(current);
acpi_add_table(rsdp, dmar);
return current;
}
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