| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2007-2010 coresystems GmbH |
| * Copyright (C) 2011 Google Inc |
| * |
| * 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 <stdint.h> |
| #include <stdlib.h> |
| #include <console/console.h> |
| #include <arch/io.h> |
| #include <arch/romcc_io.h> |
| #include <device/pci_def.h> |
| #include "sandybridge.h" |
| #include "pcie_config.c" |
| |
| static void sandybridge_setup_bars(void) |
| { |
| /* Setting up Southbridge. In the northbridge code. */ |
| printk(BIOS_DEBUG, "Setting up static southbridge registers..."); |
| pci_write_config32(PCI_DEV(0, 0x1f, 0), RCBA, DEFAULT_RCBA | 1); |
| |
| pci_write_config32(PCI_DEV(0, 0x1f, 0), PMBASE, DEFAULT_PMBASE | 1); |
| pci_write_config8(PCI_DEV(0, 0x1f, 0), 0x44 /* ACPI_CNTL */ , 0x80); /* Enable ACPI BAR */ |
| |
| printk(BIOS_DEBUG, " done.\n"); |
| |
| printk(BIOS_DEBUG, "Disabling Watchdog reboot..."); |
| RCBA32(GCS) = RCBA32(GCS) | (1 << 5); /* No reset */ |
| outw((1 << 11), DEFAULT_PMBASE | 0x60 | 0x08); /* halt timer */ |
| printk(BIOS_DEBUG, " done.\n"); |
| |
| printk(BIOS_DEBUG, "Setting up static northbridge registers..."); |
| /* Set up all hardcoded northbridge BARs */ |
| pci_write_config32(PCI_DEV(0, 0x00, 0), EPBAR, DEFAULT_EPBAR | 1); |
| pci_write_config32(PCI_DEV(0, 0x00, 0), EPBAR + 4, (0LL+DEFAULT_EPBAR) >> 32); |
| pci_write_config32(PCI_DEV(0, 0x00, 0), MCHBAR, DEFAULT_MCHBAR | 1); |
| pci_write_config32(PCI_DEV(0, 0x00, 0), MCHBAR + 4, (0LL+DEFAULT_MCHBAR) >> 32); |
| pci_write_config32(PCI_DEV(0, 0x00, 0), PCIEXBAR, DEFAULT_PCIEXBAR | 5); /* 64MB - busses 0-63 */ |
| pci_write_config32(PCI_DEV(0, 0x00, 0), PCIEXBAR + 4, (0LL+DEFAULT_PCIEXBAR) >> 32); |
| pci_write_config32(PCI_DEV(0, 0x00, 0), DMIBAR, DEFAULT_DMIBAR | 1); |
| pci_write_config32(PCI_DEV(0, 0x00, 0), DMIBAR + 4, (0LL+DEFAULT_DMIBAR) >> 32); |
| |
| /* Set C0000-FFFFF to access RAM on both reads and writes */ |
| pci_write_config8(PCI_DEV(0, 0x00, 0), PAM0, 0x30); |
| pci_write_config8(PCI_DEV(0, 0x00, 0), PAM1, 0x33); |
| pci_write_config8(PCI_DEV(0, 0x00, 0), PAM2, 0x33); |
| pci_write_config8(PCI_DEV(0, 0x00, 0), PAM3, 0x33); |
| pci_write_config8(PCI_DEV(0, 0x00, 0), PAM4, 0x33); |
| pci_write_config8(PCI_DEV(0, 0x00, 0), PAM5, 0x33); |
| pci_write_config8(PCI_DEV(0, 0x00, 0), PAM6, 0x33); |
| |
| printk(BIOS_DEBUG, " done.\n"); |
| } |
| |
| static void sandybridge_setup_graphics(void) |
| { |
| u32 reg32; |
| u16 reg16; |
| u8 reg8; |
| |
| reg16 = pci_read_config16(PCI_DEV(0,2,0), PCI_DEVICE_ID); |
| switch (reg16) { |
| case 0x0102: /* GT1 Desktop */ |
| case 0x0106: /* GT1 Mobile */ |
| case 0x010a: /* GT1 Server */ |
| case 0x0112: /* GT2 Desktop */ |
| case 0x0116: /* GT2 Mobile */ |
| case 0x0122: /* GT2 Desktop >=1.3GHz */ |
| case 0x0126: /* GT2 Mobile >=1.3GHz */ |
| case 0x0166: /* IvyBridge ??? */ |
| break; |
| default: |
| printk(BIOS_DEBUG, "Graphics not supported by this CPU/chipset.\n"); |
| return; |
| } |
| |
| printk(BIOS_DEBUG, "Initializing Graphics...\n"); |
| |
| /* Setup IGD memory by setting GGC[7:3] = 1 for 32MB */ |
| reg16 = pci_read_config16(PCI_DEV(0,0,0), GGC); |
| reg16 &= ~0x00f8; |
| reg16 |= 1 << 3; |
| /* Program GTT memory by setting GGC[9:8] = 2MB */ |
| reg16 &= ~0x0300; |
| reg16 |= 2 << 8; |
| /* Enable VGA decode */ |
| reg16 &= ~0x0002; |
| pci_write_config16(PCI_DEV(0,0,0), GGC, reg16); |
| |
| /* Enable 256MB aperture */ |
| reg8 = pci_read_config8(PCI_DEV(0, 2, 0), MSAC); |
| reg8 &= ~0x06; |
| reg8 |= 0x02; |
| pci_write_config8(PCI_DEV(0, 2, 0), MSAC, reg8); |
| |
| /* Erratum workarounds */ |
| MCHBAR8(0x5f10) = 0x20; |
| |
| reg32 = MCHBAR32(0x5f00); |
| reg32 |= (1 << 9)|(1 << 10); |
| MCHBAR32(0x5f00) = reg32; |
| |
| /* Enable SA Clock Gating */ |
| reg32 = MCHBAR32(0x5f00); |
| MCHBAR32(0x5f00) = reg32 | 1; |
| |
| /* GPU RC6 workaround for sighting 366252 */ |
| reg32 = MCHBAR32(0x5d14); |
| reg32 |= (1 << 31); |
| MCHBAR32(0x5d14) = reg32; |
| |
| /* VLW */ |
| reg32 = MCHBAR32(0x6120); |
| reg32 &= ~(1 << 0); |
| MCHBAR32(0x6120) = reg32; |
| |
| reg32 = MCHBAR32(0x5418); |
| reg32 |= (1 << 4) | (1 << 5); |
| MCHBAR32(0x5418) = reg32; |
| } |
| |
| void sandybridge_early_initialization(int chipset_type) |
| { |
| u32 capid0_a; |
| u8 reg8; |
| |
| /* Device ID Override Enable should be done very early */ |
| capid0_a = pci_read_config32(PCI_DEV(0, 0, 0), 0xe4); |
| if (capid0_a & (1 << 10)) { |
| reg8 = pci_read_config8(PCI_DEV(0, 0, 0), 0xf3); |
| reg8 &= ~7; /* Clear 2:0 */ |
| |
| if (chipset_type == SANDYBRIDGE_MOBILE) |
| reg8 |= 1; /* Set bit 0 */ |
| |
| pci_write_config8(PCI_DEV(0, 0, 0), 0xf3, reg8); |
| } |
| |
| /* Setup all BARs required for early PCIe and raminit */ |
| sandybridge_setup_bars(); |
| |
| /* Device Enable */ |
| pci_write_config32(PCI_DEV(0, 0, 0), DEVEN, DEVEN_HOST | DEVEN_IGD); |
| |
| sandybridge_setup_graphics(); |
| } |