2020-04-02 23:48:50 +02:00
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/* SPDX-License-Identifier: GPL-2.0-only */
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/* This file is part of the coreboot project. */
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2012-10-30 15:03:43 +01:00
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#include <types.h>
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#include <console/console.h>
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#include <arch/acpi.h>
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#include <device/device.h>
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2019-03-01 12:43:02 +01:00
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#include <device/pci_ops.h>
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2012-10-30 15:03:43 +01:00
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#include "haswell.h"
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2018-03-04 08:41:23 +01:00
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#include <southbridge/intel/lynxpoint/pch.h>
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2012-10-30 15:03:43 +01:00
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unsigned long acpi_fill_mcfg(unsigned long current)
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{
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2018-05-09 17:47:59 +02:00
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struct device *dev;
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2012-10-30 15:03:43 +01:00
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u32 pciexbar = 0;
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u32 pciexbar_reg;
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int max_buses;
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2017-07-04 22:35:06 +02:00
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u32 mask;
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2012-10-30 15:03:43 +01:00
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2018-05-22 01:18:00 +02:00
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dev = pcidev_on_root(0, 0);
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2012-10-30 15:03:43 +01:00
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if (!dev)
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return current;
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2016-09-17 20:32:07 +02:00
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pciexbar_reg = pci_read_config32(dev, PCIEXBAR);
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2012-10-30 15:03:43 +01:00
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2020-01-15 00:49:03 +01:00
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/* MMCFG not supported or not enabled. */
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2012-10-30 15:03:43 +01:00
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if (!(pciexbar_reg & (1 << 0)))
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return current;
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2017-07-04 22:35:06 +02:00
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mask = (1UL << 31) | (1 << 30) | (1 << 29) | (1 << 28);
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2012-10-30 15:03:43 +01:00
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switch ((pciexbar_reg >> 1) & 3) {
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2020-01-15 00:49:03 +01:00
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case 0: /* 256MB */
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2017-07-04 22:35:06 +02:00
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pciexbar = pciexbar_reg & mask;
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2012-10-30 15:03:43 +01:00
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max_buses = 256;
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break;
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2020-01-15 00:49:03 +01:00
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case 1: /* 128M */
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2017-07-04 22:35:06 +02:00
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mask |= (1 << 27);
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pciexbar = pciexbar_reg & mask;
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2012-10-30 15:03:43 +01:00
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max_buses = 128;
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break;
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2020-01-15 00:49:03 +01:00
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case 2: /* 64M */
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2017-07-04 22:35:06 +02:00
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mask |= (1 << 27) | (1 << 26);
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pciexbar = pciexbar_reg & mask;
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2012-10-30 15:03:43 +01:00
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max_buses = 64;
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break;
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2020-01-15 00:49:03 +01:00
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default: /* RSVD */
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2012-10-30 15:03:43 +01:00
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return current;
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}
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if (!pciexbar)
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return current;
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2020-01-15 00:49:03 +01:00
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current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *) current, pciexbar, 0, 0,
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max_buses - 1);
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2012-10-30 15:03:43 +01:00
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return current;
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}
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2018-03-04 08:41:23 +01:00
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static unsigned long acpi_fill_dmar(unsigned long current)
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{
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2018-05-22 01:18:00 +02:00
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struct device *const igfx_dev = pcidev_on_root(2, 0);
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2018-03-04 08:41:23 +01:00
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const u32 gfxvtbar = MCHBAR32(GFXVTBAR) & ~0xfff;
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const u32 vtvc0bar = MCHBAR32(VTVC0BAR) & ~0xfff;
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const bool gfxvten = MCHBAR32(GFXVTBAR) & 0x1;
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const bool vtvc0en = MCHBAR32(VTVC0BAR) & 0x1;
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/* iGFX has to be enabled; GFXVTBAR set, enabled, in 32-bit space */
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2020-01-15 00:49:03 +01:00
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if (igfx_dev && igfx_dev->enabled && gfxvtbar && gfxvten && !MCHBAR32(GFXVTBAR + 4)) {
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2018-03-04 08:41:23 +01:00
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const unsigned long tmp = current;
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current += acpi_create_dmar_drhd(current, 0, 0, gfxvtbar);
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2018-03-29 14:59:57 +02:00
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current += acpi_create_dmar_ds_pci(current, 0, 2, 0);
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2018-03-04 08:41:23 +01:00
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acpi_dmar_drhd_fixup(tmp, current);
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}
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/* VTVC0BAR has to be set, enabled, and in 32-bit space */
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if (vtvc0bar && vtvc0en && !MCHBAR32(VTVC0BAR + 4)) {
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2020-01-15 00:49:03 +01:00
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2018-03-04 08:41:23 +01:00
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const unsigned long tmp = current;
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2020-01-15 00:49:03 +01:00
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current += acpi_create_dmar_drhd(current, DRHD_INCLUDE_PCI_ALL, 0, vtvc0bar);
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current += acpi_create_dmar_ds_ioapic(current, 2, PCH_IOAPIC_PCI_BUS,
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PCH_IOAPIC_PCI_SLOT, 0);
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2018-03-04 08:41:23 +01:00
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size_t i;
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for (i = 0; i < 8; ++i)
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2020-01-15 00:49:03 +01:00
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current += acpi_create_dmar_ds_msi_hpet(current, 0, PCH_HPET_PCI_BUS,
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PCH_HPET_PCI_SLOT, i);
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2018-03-04 08:41:23 +01:00
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acpi_dmar_drhd_fixup(tmp, current);
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}
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return current;
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}
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2020-01-15 00:49:03 +01:00
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unsigned long northbridge_write_acpi_tables(struct device *const dev, unsigned long current,
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2018-03-04 08:41:23 +01:00
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struct acpi_rsdp *const rsdp)
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{
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/* Create DMAR table only if we have VT-d capability. */
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const u32 capid0_a = pci_read_config32(dev, CAPID0_A);
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if (capid0_a & VTD_DISABLE)
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return current;
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acpi_dmar_t *const dmar = (acpi_dmar_t *)current;
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printk(BIOS_DEBUG, "ACPI: * DMAR\n");
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acpi_create_dmar(dmar, DMAR_INTR_REMAP, acpi_fill_dmar);
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current += dmar->header.length;
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current = acpi_align_current(current);
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acpi_add_table(rsdp, dmar);
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return current;
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}
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