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Diffstat (limited to 'roms/u-boot/arch/x86/cpu/ivybridge/northbridge.c')
-rw-r--r--roms/u-boot/arch/x86/cpu/ivybridge/northbridge.c264
1 files changed, 264 insertions, 0 deletions
diff --git a/roms/u-boot/arch/x86/cpu/ivybridge/northbridge.c b/roms/u-boot/arch/x86/cpu/ivybridge/northbridge.c
new file mode 100644
index 000000000..994f8a4ff
--- /dev/null
+++ b/roms/u-boot/arch/x86/cpu/ivybridge/northbridge.c
@@ -0,0 +1,264 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * From Coreboot northbridge/intel/sandybridge/northbridge.c
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ * Copyright (C) 2011 The Chromium Authors
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <log.h>
+#include <asm/global_data.h>
+#include <asm/msr.h>
+#include <asm/cpu.h>
+#include <asm/intel_regs.h>
+#include <asm/io.h>
+#include <asm/pci.h>
+#include <asm/processor.h>
+#include <asm/arch/pch.h>
+#include <asm/arch/model_206ax.h>
+#include <asm/arch/sandybridge.h>
+#include <linux/delay.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int bridge_silicon_revision(struct udevice *dev)
+{
+ struct cpuid_result result;
+ u16 bridge_id;
+ u8 stepping;
+
+ result = cpuid(1);
+ stepping = result.eax & 0xf;
+ dm_pci_read_config16(dev, PCI_DEVICE_ID, &bridge_id);
+ bridge_id &= 0xf0;
+ return bridge_id | stepping;
+}
+
+static int get_pcie_bar(struct udevice *dev, u32 *base, u32 *len)
+{
+ u32 pciexbar_reg;
+
+ *base = 0;
+ *len = 0;
+
+ dm_pci_read_config32(dev, PCIEXBAR, &pciexbar_reg);
+
+ if (!(pciexbar_reg & (1 << 0)))
+ return 0;
+
+ switch ((pciexbar_reg >> 1) & 3) {
+ case 0: /* 256MB */
+ *base = pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) |
+ (1 << 28));
+ *len = 256 * 1024 * 1024;
+ return 1;
+ case 1: /* 128M */
+ *base = pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) |
+ (1 << 28) | (1 << 27));
+ *len = 128 * 1024 * 1024;
+ return 1;
+ case 2: /* 64M */
+ *base = pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) |
+ (1 << 28) | (1 << 27) | (1 << 26));
+ *len = 64 * 1024 * 1024;
+ return 1;
+ }
+
+ return 0;
+}
+
+static void add_fixed_resources(struct udevice *dev, int index)
+{
+ u32 pcie_config_base, pcie_config_size;
+
+ if (get_pcie_bar(dev, &pcie_config_base, &pcie_config_size)) {
+ debug("Adding PCIe config bar base=0x%08x size=0x%x\n",
+ pcie_config_base, pcie_config_size);
+ }
+}
+
+static void northbridge_dmi_init(struct udevice *dev, int rev)
+{
+ /* Clear error status bits */
+ writel(0xffffffff, DMIBAR_REG(0x1c4));
+ writel(0xffffffff, DMIBAR_REG(0x1d0));
+
+ /* Steps prior to DMI ASPM */
+ if ((rev & BASE_REV_MASK) == BASE_REV_SNB) {
+ clrsetbits_le32(DMIBAR_REG(0x250), (1 << 22) | (1 << 20),
+ 1 << 21);
+ }
+
+ setbits_le32(DMIBAR_REG(0x238), 1 << 29);
+
+ if (rev >= SNB_STEP_D0) {
+ setbits_le32(DMIBAR_REG(0x1f8), 1 << 16);
+ } else if (rev >= SNB_STEP_D1) {
+ clrsetbits_le32(DMIBAR_REG(0x1f8), 1 << 26, 1 << 16);
+ setbits_le32(DMIBAR_REG(0x1fc), (1 << 12) | (1 << 23));
+ }
+
+ /* Enable ASPM on SNB link, should happen before PCH link */
+ if ((rev & BASE_REV_MASK) == BASE_REV_SNB)
+ setbits_le32(DMIBAR_REG(0xd04), 1 << 4);
+
+ setbits_le32(DMIBAR_REG(0x88), (1 << 1) | (1 << 0));
+}
+
+static void northbridge_init(struct udevice *dev, int rev)
+{
+ u32 bridge_type;
+
+ add_fixed_resources(dev, 6);
+ northbridge_dmi_init(dev, rev);
+
+ bridge_type = readl(MCHBAR_REG(0x5f10));
+ bridge_type &= ~0xff;
+
+ if ((rev & BASE_REV_MASK) == BASE_REV_IVB) {
+ /* Enable Power Aware Interrupt Routing - fixed priority */
+ clrsetbits_8(MCHBAR_REG(0x5418), 0xf, 0x4);
+
+ /* 30h for IvyBridge */
+ bridge_type |= 0x30;
+ } else {
+ /* 20h for Sandybridge */
+ bridge_type |= 0x20;
+ }
+ writel(bridge_type, MCHBAR_REG(0x5f10));
+
+ /*
+ * Set bit 0 of BIOS_RESET_CPL to indicate to the CPU
+ * that BIOS has initialized memory and power management
+ */
+ setbits_8(MCHBAR_REG(BIOS_RESET_CPL), 1);
+ debug("Set BIOS_RESET_CPL\n");
+
+ /* Configure turbo power limits 1ms after reset complete bit */
+ mdelay(1);
+ set_power_limits(28);
+
+ /*
+ * CPUs with configurable TDP also need power limits set
+ * in MCHBAR. Use same values from MSR_PKG_POWER_LIMIT.
+ */
+ if (cpu_ivybridge_config_tdp_levels()) {
+ msr_t msr = msr_read(MSR_PKG_POWER_LIMIT);
+
+ writel(msr.lo, MCHBAR_REG(0x59A0));
+ writel(msr.hi, MCHBAR_REG(0x59A4));
+ }
+
+ /* Set here before graphics PM init */
+ writel(0x00100001, MCHBAR_REG(0x5500));
+}
+
+static void sandybridge_setup_northbridge_bars(struct udevice *dev)
+{
+ /* Set up all hardcoded northbridge BARs */
+ debug("Setting up static registers\n");
+ dm_pci_write_config32(dev, EPBAR, DEFAULT_EPBAR | 1);
+ dm_pci_write_config32(dev, EPBAR + 4, (0LL + DEFAULT_EPBAR) >> 32);
+ dm_pci_write_config32(dev, MCHBAR, MCH_BASE_ADDRESS | 1);
+ dm_pci_write_config32(dev, MCHBAR + 4, (0LL + MCH_BASE_ADDRESS) >> 32);
+ /* 64MB - busses 0-63 */
+ dm_pci_write_config32(dev, PCIEXBAR, DEFAULT_PCIEXBAR | 5);
+ dm_pci_write_config32(dev, PCIEXBAR + 4,
+ (0LL + DEFAULT_PCIEXBAR) >> 32);
+ dm_pci_write_config32(dev, DMIBAR, DEFAULT_DMIBAR | 1);
+ dm_pci_write_config32(dev, DMIBAR + 4, (0LL + DEFAULT_DMIBAR) >> 32);
+
+ /* Set C0000-FFFFF to access RAM on both reads and writes */
+ dm_pci_write_config8(dev, PAM0, 0x30);
+ dm_pci_write_config8(dev, PAM1, 0x33);
+ dm_pci_write_config8(dev, PAM2, 0x33);
+ dm_pci_write_config8(dev, PAM3, 0x33);
+ dm_pci_write_config8(dev, PAM4, 0x33);
+ dm_pci_write_config8(dev, PAM5, 0x33);
+ dm_pci_write_config8(dev, PAM6, 0x33);
+}
+
+/**
+ * sandybridge_init_iommu() - Set up IOMMU so that azalia can be used
+ *
+ * It is not obvious where these values come from. They may be undocumented.
+ */
+static void sandybridge_init_iommu(struct udevice *dev)
+{
+ u32 capid0_a;
+
+ dm_pci_read_config32(dev, 0xe4, &capid0_a);
+ if (capid0_a & (1 << 23)) {
+ log_debug("capid0_a not needed\n");
+ return;
+ }
+
+ /* setup BARs */
+ writel(IOMMU_BASE1 >> 32, MCHBAR_REG(0x5404));
+ writel(IOMMU_BASE1 | 1, MCHBAR_REG(0x5400));
+ writel(IOMMU_BASE2 >> 32, MCHBAR_REG(0x5414));
+ writel(IOMMU_BASE2 | 1, MCHBAR_REG(0x5410));
+
+ /* lock policies */
+ writel(0x80000000, IOMMU_BASE1 + 0xff0);
+
+ /* Enable azalia sound */
+ writel(0x20000000, IOMMU_BASE2 + 0xff0);
+ writel(0xa0000000, IOMMU_BASE2 + 0xff0);
+}
+
+static int bd82x6x_northbridge_early_init(struct udevice *dev)
+{
+ const int chipset_type = SANDYBRIDGE_MOBILE;
+ u32 capid0_a;
+ u8 reg8;
+
+ /* Device ID Override Enable should be done very early */
+ dm_pci_read_config32(dev, 0xe4, &capid0_a);
+ if (capid0_a & (1 << 10)) {
+ dm_pci_read_config8(dev, 0xf3, &reg8);
+ reg8 &= ~7; /* Clear 2:0 */
+
+ if (chipset_type == SANDYBRIDGE_MOBILE)
+ reg8 |= 1; /* Set bit 0 */
+
+ dm_pci_write_config8(dev, 0xf3, reg8);
+ }
+
+ sandybridge_setup_northbridge_bars(dev);
+
+ /* Setup IOMMU BARs */
+ sandybridge_init_iommu(dev);
+
+ /* Device Enable */
+ dm_pci_write_config32(dev, DEVEN, DEVEN_HOST | DEVEN_IGD);
+
+ return 0;
+}
+
+static int bd82x6x_northbridge_probe(struct udevice *dev)
+{
+ int rev;
+
+ if (!(gd->flags & GD_FLG_RELOC))
+ return bd82x6x_northbridge_early_init(dev);
+
+ rev = bridge_silicon_revision(dev);
+ northbridge_init(dev, rev);
+
+ return 0;
+}
+
+static const struct udevice_id bd82x6x_northbridge_ids[] = {
+ { .compatible = "intel,bd82x6x-northbridge" },
+ { }
+};
+
+U_BOOT_DRIVER(bd82x6x_northbridge_drv) = {
+ .name = "bd82x6x_northbridge",
+ .id = UCLASS_NORTHBRIDGE,
+ .of_match = bd82x6x_northbridge_ids,
+ .probe = bd82x6x_northbridge_probe,
+};