Add init for the northbridge, another part of the platform controller hub.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v2: None
arch/x86/cpu/ivybridge/Makefile | 1 + arch/x86/cpu/ivybridge/bd82x6x.c | 2 + arch/x86/cpu/ivybridge/northbridge.c | 188 ++++++++++++++++++++++ arch/x86/include/asm/arch-ivybridge/model_206ax.h | 4 + arch/x86/include/asm/arch-ivybridge/sandybridge.h | 13 +- 5 files changed, 207 insertions(+), 1 deletion(-) create mode 100644 arch/x86/cpu/ivybridge/northbridge.c
diff --git a/arch/x86/cpu/ivybridge/Makefile b/arch/x86/cpu/ivybridge/Makefile index 95491b5..1296a78 100644 --- a/arch/x86/cpu/ivybridge/Makefile +++ b/arch/x86/cpu/ivybridge/Makefile @@ -13,6 +13,7 @@ obj-y += lpc.o obj-y += me_status.o obj-y += model_206ax.o obj-y += microcode_intel.o +obj-y += northbridge.o obj-y += pch.o obj-y += pci.o obj-y += report_platform.o diff --git a/arch/x86/cpu/ivybridge/bd82x6x.c b/arch/x86/cpu/ivybridge/bd82x6x.c index 1a3c036..739f979 100644 --- a/arch/x86/cpu/ivybridge/bd82x6x.c +++ b/arch/x86/cpu/ivybridge/bd82x6x.c @@ -128,6 +128,8 @@ int bd82x6x_init(void)
bd82x6x_pci_init(PCH_DEV); bd82x6x_sata_enable(PCH_SATA_DEV, blob, sata_node); + northbridge_enable(PCH_DEV); + northbridge_init(PCH_DEV);
return 0; } diff --git a/arch/x86/cpu/ivybridge/northbridge.c b/arch/x86/cpu/ivybridge/northbridge.c new file mode 100644 index 0000000..c50b5de --- /dev/null +++ b/arch/x86/cpu/ivybridge/northbridge.c @@ -0,0 +1,188 @@ +/* + * From Coreboot northbridge/intel/sandybridge/northbridge.c + * + * Copyright (C) 2007-2009 coresystems GmbH + * Copyright (C) 2011 The Chromium Authors + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <common.h> +#include <asm/msr.h> +#include <asm/acpi.h> +#include <asm/cpu.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> + +static int bridge_revision_id = -1; + +int bridge_silicon_revision(void) +{ + if (bridge_revision_id < 0) { + struct cpuid_result result; + uint8_t stepping, bridge_id; + pci_dev_t dev; + + result = cpuid(1); + stepping = result.eax & 0xf; + dev = PCI_BDF(0, 0, 0); + bridge_id = pci_read_config16(dev, PCI_DEVICE_ID) & 0xf0; + bridge_revision_id = bridge_id | stepping; + } + + return bridge_revision_id; +} + +/* + * Reserve everything between A segment and 1MB: + * + * 0xa0000 - 0xbffff: legacy VGA + * 0xc0000 - 0xcffff: VGA OPROM (needed by kernel) + * 0xe0000 - 0xfffff: SeaBIOS, if used, otherwise DMI + */ +static const int legacy_hole_base_k = 0xa0000 / 1024; +static const int legacy_hole_size_k = 384; + +static int get_pcie_bar(u32 *base, u32 *len) +{ + pci_dev_t dev = PCI_BDF(0, 0, 0); + u32 pciexbar_reg; + + *base = 0; + *len = 0; + + pciexbar_reg = pci_read_config32(dev, PCIEXBAR); + + 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(pci_dev_t dev, int index) +{ + u32 pcie_config_base, pcie_config_size; + + if (get_pcie_bar(&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(pci_dev_t dev) +{ + /* Clear error status bits */ + writel(0xffffffff, DMIBAR_REG(0x1c4)); + writel(0xffffffff, DMIBAR_REG(0x1d0)); + + /* Steps prior to DMI ASPM */ + if ((bridge_silicon_revision() & 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 (bridge_silicon_revision() >= SNB_STEP_D0) { + setbits_le32(DMIBAR_REG(0x1f8), 1 << 16); + } else if (bridge_silicon_revision() >= 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 ((bridge_silicon_revision() & BASE_REV_MASK) == BASE_REV_SNB) + setbits_le32(DMIBAR_REG(0xd04), 1 << 4); + + setbits_le32(DMIBAR_REG(0x88), (1 << 1) | (1 << 0)); +} + +void northbridge_init(pci_dev_t dev) +{ + u32 bridge_type; + + add_fixed_resources(dev, 6); + northbridge_dmi_init(dev); + + bridge_type = readl(MCHBAR_REG(0x5f10)); + bridge_type &= ~0xff; + + if ((bridge_silicon_revision() & 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_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)); +} + +void northbridge_enable(pci_dev_t dev) +{ +#if CONFIG_HAVE_ACPI_RESUME + switch (pci_read_config32(dev, SKPAD)) { + case 0xcafebabe: + debug("Normal boot.\n"); + apci_set_slp_type(0); + break; + case 0xcafed00d: + debug("S3 Resume.\n"); + apci_set_slp_type(3); + break; + default: + debug("Unknown boot method, assuming normal.\n"); + apci_set_slp_type(0); + break; + } +#endif +} diff --git a/arch/x86/include/asm/arch-ivybridge/model_206ax.h b/arch/x86/include/asm/arch-ivybridge/model_206ax.h index 8281d7a..7b4f2e7 100644 --- a/arch/x86/include/asm/arch-ivybridge/model_206ax.h +++ b/arch/x86/include/asm/arch-ivybridge/model_206ax.h @@ -79,4 +79,8 @@ #define PSS_LATENCY_TRANSITION 10 #define PSS_LATENCY_BUSMASTER 10
+/* Configure power limits for turbo mode */ +void set_power_limits(u8 power_limit_1_time); +int cpu_config_tdp_levels(void); + #endif diff --git a/arch/x86/include/asm/arch-ivybridge/sandybridge.h b/arch/x86/include/asm/arch-ivybridge/sandybridge.h index 114ee19..cf7457f 100644 --- a/arch/x86/include/asm/arch-ivybridge/sandybridge.h +++ b/arch/x86/include/asm/arch-ivybridge/sandybridge.h @@ -97,11 +97,22 @@ /* * MCHBAR */ -#define MCHBAR_REG(reg) (DEFAULT_RCBA + (reg)) +#define MCHBAR_REG(reg) (DEFAULT_MCHBAR + (reg))
#define SSKPD 0x5d14 /* 16bit (scratchpad) */ #define BIOS_RESET_CPL 0x5da8 /* 8bit */
+/* + * DMIBAR + */ + +#define DMIBAR_REG(x) (DEFAULT_DMIBAR + x) + +int bridge_silicon_revision(void); + +void northbridge_enable(pci_dev_t dev); +void northbridge_init(pci_dev_t dev); + void report_platform_info(void);
void sandybridge_early_init(int chipset_type);