diff options
Diffstat (limited to 'arch/x86/cpu/ivybridge/early_init.c')
| -rw-r--r-- | arch/x86/cpu/ivybridge/early_init.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/arch/x86/cpu/ivybridge/early_init.c b/arch/x86/cpu/ivybridge/early_init.c new file mode 100644 index 0000000..eb8f613 --- /dev/null +++ b/arch/x86/cpu/ivybridge/early_init.c @@ -0,0 +1,145 @@ +/* + * From Coreboot + * + * Copyright (C) 2007-2010 coresystems GmbH + * Copyright (C) 2011 Google Inc + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/pci.h> +#include <asm/arch/pch.h> +#include <asm/arch/sandybridge.h> + +static void sandybridge_setup_bars(pci_dev_t pch_dev, pci_dev_t lpc_dev) +{ + /* Setting up Southbridge. In the northbridge code. */ + debug("Setting up static southbridge registers\n"); + pci_write_config32(lpc_dev, PCH_RCBA_BASE, DEFAULT_RCBA | 1); + + pci_write_config32(lpc_dev, PMBASE, DEFAULT_PMBASE | 1); + pci_write_config8(lpc_dev, ACPI_CNTL, 0x80); /* Enable ACPI BAR */ + + debug("Disabling watchdog reboot\n"); + setbits_le32(RCB_REG(GCS), 1 >> 5); /* No reset */ + outw(1 << 11, DEFAULT_PMBASE | 0x60 | 0x08); /* halt timer */ + + /* Set up all hardcoded northbridge BARs */ + debug("Setting up static registers\n"); + pci_write_config32(pch_dev, EPBAR, DEFAULT_EPBAR | 1); + pci_write_config32(pch_dev, EPBAR + 4, (0LL + DEFAULT_EPBAR) >> 32); + pci_write_config32(pch_dev, MCHBAR, DEFAULT_MCHBAR | 1); + pci_write_config32(pch_dev, MCHBAR + 4, (0LL + DEFAULT_MCHBAR) >> 32); + /* 64MB - busses 0-63 */ + pci_write_config32(pch_dev, PCIEXBAR, DEFAULT_PCIEXBAR | 5); + pci_write_config32(pch_dev, PCIEXBAR + 4, + (0LL + DEFAULT_PCIEXBAR) >> 32); + pci_write_config32(pch_dev, DMIBAR, DEFAULT_DMIBAR | 1); + pci_write_config32(pch_dev, DMIBAR + 4, (0LL + DEFAULT_DMIBAR) >> 32); + + /* Set C0000-FFFFF to access RAM on both reads and writes */ + pci_write_config8(pch_dev, PAM0, 0x30); + pci_write_config8(pch_dev, PAM1, 0x33); + pci_write_config8(pch_dev, PAM2, 0x33); + pci_write_config8(pch_dev, PAM3, 0x33); + pci_write_config8(pch_dev, PAM4, 0x33); + pci_write_config8(pch_dev, PAM5, 0x33); + pci_write_config8(pch_dev, PAM6, 0x33); +} + +static void sandybridge_setup_graphics(pci_dev_t pch_dev, pci_dev_t video_dev) +{ + u32 reg32; + u16 reg16; + u8 reg8; + + reg16 = pci_read_config16(video_dev, 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 0x0156: /* IvyBridge */ + case 0x0166: /* IvyBridge */ + break; + default: + debug("Graphics not supported by this CPU/chipset\n"); + return; + } + + debug("Initialising Graphics\n"); + + /* Setup IGD memory by setting GGC[7:3] = 1 for 32MB */ + reg16 = pci_read_config16(pch_dev, 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(pch_dev, GGC, reg16); + + /* Enable 256MB aperture */ + reg8 = pci_read_config8(video_dev, MSAC); + reg8 &= ~0x06; + reg8 |= 0x02; + pci_write_config8(video_dev, MSAC, reg8); + + /* Erratum workarounds */ + reg32 = readl(MCHBAR_REG(0x5f00)); + reg32 |= (1 << 9) | (1 << 10); + writel(reg32, MCHBAR_REG(0x5f00)); + + /* Enable SA Clock Gating */ + reg32 = readl(MCHBAR_REG(0x5f00)); + writel(reg32 | 1, MCHBAR_REG(0x5f00)); + + /* GPU RC6 workaround for sighting 366252 */ + reg32 = readl(MCHBAR_REG(0x5d14)); + reg32 |= (1 << 31); + writel(reg32, MCHBAR_REG(0x5d14)); + + /* VLW */ + reg32 = readl(MCHBAR_REG(0x6120)); + reg32 &= ~(1 << 0); + writel(reg32, MCHBAR_REG(0x6120)); + + reg32 = readl(MCHBAR_REG(0x5418)); + reg32 |= (1 << 4) | (1 << 5); + writel(reg32, MCHBAR_REG(0x5418)); +} + +void sandybridge_early_init(int chipset_type) +{ + pci_dev_t pch_dev = PCH_DEV; + pci_dev_t video_dev = PCH_VIDEO_DEV; + pci_dev_t lpc_dev = PCH_LPC_DEV; + u32 capid0_a; + u8 reg8; + + /* Device ID Override Enable should be done very early */ + capid0_a = pci_read_config32(pch_dev, 0xe4); + if (capid0_a & (1 << 10)) { + reg8 = pci_read_config8(pch_dev, 0xf3); + reg8 &= ~7; /* Clear 2:0 */ + + if (chipset_type == SANDYBRIDGE_MOBILE) + reg8 |= 1; /* Set bit 0 */ + + pci_write_config8(pch_dev, 0xf3, reg8); + } + + /* Setup all BARs required for early PCIe and raminit */ + sandybridge_setup_bars(pch_dev, lpc_dev); + + /* Device Enable */ + pci_write_config32(pch_dev, DEVEN, DEVEN_HOST | DEVEN_IGD); + + sandybridge_setup_graphics(pch_dev, video_dev); +} |