| /* |
| * 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. |
| */ |
| |
| #include <stdint.h> |
| #include <stdlib.h> |
| #include <console/console.h> |
| #include <device/mmio.h> |
| #include <device/pci_def.h> |
| #include <device/pci_ops.h> |
| #include <elog.h> |
| #include "haswell.h" |
| |
| static bool peg_hidden[3]; |
| |
| static void haswell_setup_bars(void) |
| { |
| 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), DMIBAR, (uintptr_t)DEFAULT_DMIBAR | 1); |
| pci_write_config32(PCI_DEV(0, 0x00, 0), DMIBAR + 4, (0LL+(uintptr_t)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 haswell_setup_igd(void) |
| { |
| bool igd_enabled; |
| u16 ggc; |
| u8 reg8; |
| |
| printk(BIOS_DEBUG, "Initializing IGD...\n"); |
| |
| igd_enabled = !!(pci_read_config32(PCI_DEV(0, 0, 0), DEVEN) |
| & DEVEN_D2EN); |
| |
| ggc = pci_read_config16(PCI_DEV(0, 0, 0), GGC); |
| ggc &= ~0x3f8; |
| if (igd_enabled) { |
| ggc |= GGC_GTT_2MB | GGC_IGD_MEM_IN_32MB_UNITS(1); |
| ggc &= ~GGC_DISABLE_VGA_IO_DECODE; |
| } else { |
| ggc |= GGC_GTT_0MB | GGC_IGD_MEM_IN_32MB_UNITS(0) | |
| GGC_DISABLE_VGA_IO_DECODE; |
| } |
| pci_write_config16(PCI_DEV(0, 0, 0), GGC, ggc); |
| |
| if (!igd_enabled) { |
| printk(BIOS_DEBUG, "IGD is disabled.\n"); |
| return; |
| } |
| |
| /* 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); |
| } |
| |
| static void start_peg2_link_training(const pci_devfn_t dev) |
| { |
| u32 mask; |
| |
| switch (dev) { |
| case PCI_DEV(0, 1, 2): |
| mask = DEVEN_D1F2EN; |
| break; |
| case PCI_DEV(0, 1, 1): |
| mask = DEVEN_D1F1EN; |
| break; |
| case PCI_DEV(0, 1, 0): |
| mask = DEVEN_D1F0EN; |
| break; |
| default: |
| printk(BIOS_ERR, "Link training tried on a non-PEG device!\n"); |
| return; |
| } |
| |
| pci_update_config32(dev, 0xc24, ~(1 << 16), 1 << 5); |
| printk(BIOS_DEBUG, "Started PEG1%d link training.\n", PCI_FUNC(dev)); |
| |
| /* |
| * The PEG device is hidden while the MRC runs. This is because the |
| * MRC makes configurations that are not ideal if it sees a VGA |
| * device in a PEG slot, and it locks registers preventing changes |
| * to these configurations. |
| */ |
| pci_update_config32(PCI_DEV(0, 0, 0), DEVEN, ~mask, 0); |
| peg_hidden[PCI_FUNC(dev)] = true; |
| printk(BIOS_DEBUG, "Temporarily hiding PEG1%d.\n", PCI_FUNC(dev)); |
| } |
| |
| void haswell_unhide_peg(void) |
| { |
| u32 deven = pci_read_config32(PCI_DEV(0, 0, 0), DEVEN); |
| |
| for (u8 fn = 0; fn <= 2; fn++) { |
| if (peg_hidden[fn]) { |
| deven |= DEVEN_D1F0EN >> fn; |
| peg_hidden[fn] = false; |
| printk(BIOS_DEBUG, "Unhiding PEG1%d.\n", fn); |
| } |
| } |
| |
| pci_write_config32(PCI_DEV(0, 0, 0), DEVEN, deven); |
| } |
| |
| static void haswell_setup_peg(void) |
| { |
| u32 deven = pci_read_config32(PCI_DEV(0, 0, 0), DEVEN); |
| |
| if (deven & DEVEN_D1F2EN) |
| start_peg2_link_training(PCI_DEV(0, 1, 2)); |
| if (deven & DEVEN_D1F1EN) |
| start_peg2_link_training(PCI_DEV(0, 1, 1)); |
| if (deven & DEVEN_D1F0EN) |
| start_peg2_link_training(PCI_DEV(0, 1, 0)); |
| } |
| |
| static void haswell_setup_misc(void) |
| { |
| u32 reg32; |
| |
| /* Erratum workarounds */ |
| 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 |= (1UL << 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; |
| } |
| |
| static void haswell_setup_iommu(void) |
| { |
| const u32 capid0_a = pci_read_config32(PCI_DEV(0, 0, 0), CAPID0_A); |
| |
| if (capid0_a & VTD_DISABLE) |
| return; |
| |
| /* setup BARs: zeroize top 32 bits; set enable bit */ |
| MCHBAR32(GFXVTBAR + 4) = GFXVT_BASE_ADDRESS >> 32; |
| MCHBAR32(GFXVTBAR) = GFXVT_BASE_ADDRESS | 1; |
| MCHBAR32(VTVC0BAR + 4) = VTVC0_BASE_ADDRESS >> 32; |
| MCHBAR32(VTVC0BAR) = VTVC0_BASE_ADDRESS | 1; |
| |
| /* set L3HIT2PEND_DIS, lock GFXVTBAR policy cfg registers */ |
| u32 reg32; |
| reg32 = read32((void *)(GFXVT_BASE_ADDRESS + ARCHDIS)); |
| write32((void *)(GFXVT_BASE_ADDRESS + ARCHDIS), |
| reg32 | DMAR_LCKDN | L3HIT2PEND_DIS); |
| /* clear SPCAPCTRL */ |
| reg32 = read32((void *)(VTVC0_BASE_ADDRESS + ARCHDIS)) & ~SPCAPCTRL; |
| /* set GLBIOTLBINV, GLBCTXTINV; lock VTVC0BAR policy cfg registers */ |
| write32((void *)(VTVC0_BASE_ADDRESS + ARCHDIS), |
| reg32 | DMAR_LCKDN | GLBIOTLBINV | GLBCTXTINV); |
| } |
| |
| void haswell_early_initialization(int chipset_type) |
| { |
| /* Setup all BARs required for early PCIe and raminit */ |
| haswell_setup_bars(); |
| |
| /* Setup IOMMU BARs */ |
| haswell_setup_iommu(); |
| |
| haswell_setup_peg(); |
| haswell_setup_igd(); |
| |
| haswell_setup_misc(); |
| } |