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/* SPDX-License-Identifier: GPL-2.0-only */
#include <stdint.h>
#include <console/console.h>
#include <arch/io.h>
#include <device/pci_ops.h>
#include <device/pci_def.h>
#include <elog.h>
#include <cpu/x86/msr.h>
#include <cpu/intel/speedstep.h>
#include <cpu/intel/turbo.h>
#include <arch/cpu.h>
#include "ironlake.h"
static void ironlake_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, 0);
pci_write_config32(PCI_DEV(0, 0x00, 0), MCHBAR, (uintptr_t)DEFAULT_MCHBAR | 1);
pci_write_config32(PCI_DEV(0, 0x00, 0), MCHBAR + 4, 0);
pci_write_config32(PCI_DEV(0, 0x00, 0), DMIBAR, (uintptr_t)DEFAULT_DMIBAR | 1);
pci_write_config32(PCI_DEV(0, 0x00, 0), DMIBAR + 4, 0);
/* Set C0000-FFFFF to access RAM on both reads and writes */
pci_write_config8(QPI_SAD, QPD0F1_PAM(0), 0x30);
pci_write_config8(QPI_SAD, QPD0F1_PAM(1), 0x33);
pci_write_config8(QPI_SAD, QPD0F1_PAM(2), 0x33);
pci_write_config8(QPI_SAD, QPD0F1_PAM(3), 0x33);
pci_write_config8(QPI_SAD, QPD0F1_PAM(4), 0x33);
pci_write_config8(QPI_SAD, QPD0F1_PAM(5), 0x33);
pci_write_config8(QPI_SAD, QPD0F1_PAM(6), 0x33);
printk(BIOS_DEBUG, " done.\n");
}
static void early_cpu_init(void)
{
msr_t m;
/* bit 0 = disable multicore,
bit 1 = disable quadcore,
bit 8 = disable hyperthreading. */
pci_update_config32(QPI_NON_CORE, DESIRED_CORES, 0xfffffefc, 0x10000);
u8 reg8;
struct cpuid_result result;
result = cpuid_ext(0x6, 0x8b);
if (!(result.eax & 0x2)) {
m = rdmsr(MSR_FSB_CLOCK_VCC);
reg8 = ((m.lo & 0xff00) >> 8) + 1;
m = rdmsr(IA32_PERF_CTL);
m.lo = (m.lo & ~0xff) | reg8;
wrmsr(IA32_PERF_CTL, m);
m = rdmsr(IA32_MISC_ENABLE);
m.hi &= ~0x00000040;
m.lo |= 0x10000;
wrmsr(IA32_MISC_ENABLE, m);
}
m = rdmsr(MSR_FSB_CLOCK_VCC);
reg8 = ((m.lo & 0xff00) >> 8) + 1;
m = rdmsr(IA32_PERF_CTL);
m.lo = (m.lo & ~0xff) | reg8;
wrmsr(IA32_PERF_CTL, m);
m = rdmsr(IA32_MISC_ENABLE);
m.lo |= 0x10000;
wrmsr(IA32_MISC_ENABLE, m);
}
void ironlake_early_initialization(int chipset_type)
{
u32 capid0_a;
u8 reg8;
int s3_resume;
/* 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 == IRONLAKE_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 */
ibexpeak_setup_bars();
ironlake_setup_bars();
s3_resume = (inw(DEFAULT_PMBASE + PM1_STS) & WAK_STS) &&
(((inl(DEFAULT_PMBASE + PM1_CNT) >> 10) & 7) == SLP_TYP_S3);
elog_boot_notify(s3_resume);
/* Device Enable */
pci_write_config32(PCI_DEV(0, 0, 0), DEVEN, DEVEN_IGD | DEVEN_PEG10 | DEVEN_HOST);
early_cpu_init();
pci_write_config32(PCI_DEV(0, 0x16, 0), 0x10, (uintptr_t)DEFAULT_HECIBAR);
pci_write_config32(PCI_DEV(0, 0x16, 0), PCI_COMMAND,
PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
/* Magic for S3 resume. Must be done early. */
if (s3_resume) {
MCHBAR32(0x1e8) = (MCHBAR32(0x1e8) & ~1) | 6;
MCHBAR32(0x1e8) = (MCHBAR32(0x1e8) & ~3) | 4;
}
}
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