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-rw-r--r--src/northbridge/intel/nehalem/acpi.c198
1 files changed, 198 insertions, 0 deletions
diff --git a/src/northbridge/intel/nehalem/acpi.c b/src/northbridge/intel/nehalem/acpi.c
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+++ b/src/northbridge/intel/nehalem/acpi.c
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+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ * Copyright (C) 2012 The Chromium OS Authors
+ * Copyright (C) 2013 Vladimir Serbinenko
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; version 2 of
+ * the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <types.h>
+#include <string.h>
+#include <console/console.h>
+#include <arch/io.h>
+#include <arch/acpi.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <build.h>
+#include "nehalem.h"
+
+unsigned long acpi_fill_mcfg(unsigned long current)
+{
+ u32 pciexbar = 0;
+ u32 pciexbar_reg;
+ int max_buses;
+
+ /* Quickpath bus is not in standard coreboot device tree,
+ so read register directly. */
+ pciexbar_reg = read32(DEFAULT_PCIEXBAR
+ | (QUICKPATH_BUS << 20) | 0x1050);
+
+ // MMCFG not supported or not enabled.
+ if (!(pciexbar_reg & (1 << 0)))
+ return current;
+
+ switch ((pciexbar_reg >> 1) & 3) {
+ case 0: // 256MB
+ pciexbar =
+ pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) |
+ (1 << 28));
+ max_buses = 256;
+ break;
+ case 1: // 128M
+ pciexbar =
+ pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) |
+ (1 << 28) | (1 << 27));
+ max_buses = 128;
+ break;
+ case 2: // 64M
+ pciexbar =
+ pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) |
+ (1 << 28) | (1 << 27) | (1 << 26));
+ max_buses = 64;
+ break;
+ default: // RSVD
+ return current;
+ }
+
+ if (!pciexbar)
+ return current;
+
+ current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *) current,
+ pciexbar, 0x0, 0x0, max_buses - 1);
+
+ return current;
+}
+
+static void *get_intel_vbios(void)
+{
+ /* This should probably be looking at CBFS or we should always
+ * deploy the VBIOS on Intel systems, even if we don't run it
+ * in coreboot (e.g. SeaBIOS only scenarios).
+ */
+ u8 *vbios = (u8 *) 0xc0000;
+
+ optionrom_header_t *oprom = (optionrom_header_t *) vbios;
+ optionrom_pcir_t *pcir = (optionrom_pcir_t *) (vbios +
+ oprom->pcir_offset);
+
+ printk(BIOS_DEBUG, "GET_VBIOS: %x %x %x %x %x\n",
+ oprom->signature, pcir->vendor, pcir->classcode[0],
+ pcir->classcode[1], pcir->classcode[2]);
+
+ if ((oprom->signature == OPROM_SIGNATURE) &&
+ (pcir->vendor == PCI_VENDOR_ID_INTEL) &&
+ (pcir->classcode[0] == 0x00) &&
+ (pcir->classcode[1] == 0x00) && (pcir->classcode[2] == 0x03))
+ return (void *)vbios;
+
+ return NULL;
+}
+
+static int init_opregion_vbt(igd_opregion_t * opregion)
+{
+ void *vbios;
+ vbios = get_intel_vbios();
+ if (!vbios) {
+ printk(BIOS_DEBUG, "VBIOS not found.\n");
+ return 1;
+ }
+
+ printk(BIOS_DEBUG, " ... VBIOS found at %p\n", vbios);
+ optionrom_header_t *oprom = (optionrom_header_t *) vbios;
+ optionrom_vbt_t *vbt = (optionrom_vbt_t *) (vbios + oprom->vbt_offset);
+
+ if (read32((unsigned long)vbt->hdr_signature) != VBT_SIGNATURE) {
+ printk(BIOS_DEBUG, "VBT not found!\n");
+ return 1;
+ }
+
+ memcpy(opregion->header.vbios_version, vbt->coreblock_biosbuild, 4);
+ memcpy(opregion->vbt.gvd1, vbt, vbt->hdr_vbt_size < 7168 ?
+ vbt->hdr_vbt_size : 7168);
+
+ return 0;
+}
+
+/* Initialize IGD OpRegion, called from ACPI code */
+int init_igd_opregion(igd_opregion_t * opregion)
+{
+ device_t igd;
+ u16 reg16;
+
+ memset((void *)opregion, 0, sizeof(igd_opregion_t));
+
+ // FIXME if IGD is disabled, we should exit here.
+
+ memcpy(&opregion->header.signature, IGD_OPREGION_SIGNATURE,
+ sizeof(IGD_OPREGION_SIGNATURE));
+
+ /* 8kb */
+ opregion->header.size = sizeof(igd_opregion_t) / 1024;
+ opregion->header.version = IGD_OPREGION_VERSION;
+
+ // FIXME We just assume we're mobile for now
+ opregion->header.mailboxes = MAILBOXES_MOBILE;
+
+ // TODO Initialize Mailbox 1
+
+ // TODO Initialize Mailbox 3
+ opregion->mailbox3.bclp = IGD_BACKLIGHT_BRIGHTNESS;
+ opregion->mailbox3.pfit = IGD_FIELD_VALID | IGD_PFIT_STRETCH;
+ opregion->mailbox3.pcft = 0; // should be (IMON << 1) & 0x3e
+ opregion->mailbox3.cblv = IGD_FIELD_VALID | IGD_INITIAL_BRIGHTNESS;
+ opregion->mailbox3.bclm[0] = IGD_WORD_FIELD_VALID + 0x0000;
+ opregion->mailbox3.bclm[1] = IGD_WORD_FIELD_VALID + 0x0a19;
+ opregion->mailbox3.bclm[2] = IGD_WORD_FIELD_VALID + 0x1433;
+ opregion->mailbox3.bclm[3] = IGD_WORD_FIELD_VALID + 0x1e4c;
+ opregion->mailbox3.bclm[4] = IGD_WORD_FIELD_VALID + 0x2866;
+ opregion->mailbox3.bclm[5] = IGD_WORD_FIELD_VALID + 0x327f;
+ opregion->mailbox3.bclm[6] = IGD_WORD_FIELD_VALID + 0x3c99;
+ opregion->mailbox3.bclm[7] = IGD_WORD_FIELD_VALID + 0x46b2;
+ opregion->mailbox3.bclm[8] = IGD_WORD_FIELD_VALID + 0x50cc;
+ opregion->mailbox3.bclm[9] = IGD_WORD_FIELD_VALID + 0x5ae5;
+ opregion->mailbox3.bclm[10] = IGD_WORD_FIELD_VALID + 0x64ff;
+
+ init_opregion_vbt(opregion);
+
+ /* TODO This needs to happen in S3 resume, too.
+ * Maybe it should move to the finalize handler
+ */
+ igd = dev_find_slot(0, PCI_DEVFN(0x2, 0));
+
+ pci_write_config32(igd, ASLS, (u32) opregion);
+ reg16 = pci_read_config16(igd, SWSCI);
+ reg16 &= ~(1 << 0);
+ reg16 |= (1 << 15);
+ pci_write_config16(igd, SWSCI, reg16);
+
+ /* clear dmisci status */
+ reg16 = inw(DEFAULT_PMBASE + TCO1_STS);
+ reg16 |= DMISCI_STS; // reference code does an &=
+ outw(DEFAULT_PMBASE + TCO1_STS, reg16);
+
+ /* clear acpi tco status */
+ outl(DEFAULT_PMBASE + GPE0_STS, TCOSCI_STS);
+
+ /* enable acpi tco scis */
+ reg16 = inw(DEFAULT_PMBASE + GPE0_EN);
+ reg16 |= TCOSCI_EN;
+ outw(DEFAULT_PMBASE + GPE0_EN, reg16);
+
+ return 0;
+}
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