mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 08:58:52 +09:00
![Simon Glass](/assets/img/avatar_default.png)
At present devices use a simple integer offset to record the device tree node associated with the device. In preparation for supporting a live device tree, which uses a node pointer instead, refactor existing code to access this field through an inline function. Signed-off-by: Simon Glass <sjg@chromium.org>
498 lines
11 KiB
C
498 lines
11 KiB
C
/*
|
|
* From Coreboot file of same name
|
|
*
|
|
* Copyright (C) 2007-2009 coresystems GmbH
|
|
* Copyright (C) 2011 The Chromium Authors
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <cpu.h>
|
|
#include <dm.h>
|
|
#include <fdtdec.h>
|
|
#include <malloc.h>
|
|
#include <asm/cpu.h>
|
|
#include <asm/cpu_x86.h>
|
|
#include <asm/msr.h>
|
|
#include <asm/msr-index.h>
|
|
#include <asm/mtrr.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/speedstep.h>
|
|
#include <asm/turbo.h>
|
|
#include <asm/arch/model_206ax.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static void enable_vmx(void)
|
|
{
|
|
struct cpuid_result regs;
|
|
#ifdef CONFIG_ENABLE_VMX
|
|
int enable = true;
|
|
#else
|
|
int enable = false;
|
|
#endif
|
|
msr_t msr;
|
|
|
|
regs = cpuid(1);
|
|
/* Check that the VMX is supported before reading or writing the MSR. */
|
|
if (!((regs.ecx & CPUID_VMX) || (regs.ecx & CPUID_SMX)))
|
|
return;
|
|
|
|
msr = msr_read(MSR_IA32_FEATURE_CONTROL);
|
|
|
|
if (msr.lo & (1 << 0)) {
|
|
debug("VMX is locked, so %s will do nothing\n", __func__);
|
|
/* VMX locked. If we set it again we get an illegal
|
|
* instruction
|
|
*/
|
|
return;
|
|
}
|
|
|
|
/* The IA32_FEATURE_CONTROL MSR may initialize with random values.
|
|
* It must be cleared regardless of VMX config setting.
|
|
*/
|
|
msr.hi = 0;
|
|
msr.lo = 0;
|
|
|
|
debug("%s VMX\n", enable ? "Enabling" : "Disabling");
|
|
|
|
/*
|
|
* Even though the Intel manual says you must set the lock bit in
|
|
* addition to the VMX bit in order for VMX to work, it is incorrect.
|
|
* Thus we leave it unlocked for the OS to manage things itself.
|
|
* This is good for a few reasons:
|
|
* - No need to reflash the bios just to toggle the lock bit.
|
|
* - The VMX bits really really should match each other across cores,
|
|
* so hard locking it on one while another has the opposite setting
|
|
* can easily lead to crashes as code using VMX migrates between
|
|
* them.
|
|
* - Vendors that want to "upsell" from a bios that disables+locks to
|
|
* one that doesn't is sleazy.
|
|
* By leaving this to the OS (e.g. Linux), people can do exactly what
|
|
* they want on the fly, and do it correctly (e.g. across multiple
|
|
* cores).
|
|
*/
|
|
if (enable) {
|
|
msr.lo |= (1 << 2);
|
|
if (regs.ecx & CPUID_SMX)
|
|
msr.lo |= (1 << 1);
|
|
}
|
|
|
|
msr_write(MSR_IA32_FEATURE_CONTROL, msr);
|
|
}
|
|
|
|
/* Convert time in seconds to POWER_LIMIT_1_TIME MSR value */
|
|
static const u8 power_limit_time_sec_to_msr[] = {
|
|
[0] = 0x00,
|
|
[1] = 0x0a,
|
|
[2] = 0x0b,
|
|
[3] = 0x4b,
|
|
[4] = 0x0c,
|
|
[5] = 0x2c,
|
|
[6] = 0x4c,
|
|
[7] = 0x6c,
|
|
[8] = 0x0d,
|
|
[10] = 0x2d,
|
|
[12] = 0x4d,
|
|
[14] = 0x6d,
|
|
[16] = 0x0e,
|
|
[20] = 0x2e,
|
|
[24] = 0x4e,
|
|
[28] = 0x6e,
|
|
[32] = 0x0f,
|
|
[40] = 0x2f,
|
|
[48] = 0x4f,
|
|
[56] = 0x6f,
|
|
[64] = 0x10,
|
|
[80] = 0x30,
|
|
[96] = 0x50,
|
|
[112] = 0x70,
|
|
[128] = 0x11,
|
|
};
|
|
|
|
/* Convert POWER_LIMIT_1_TIME MSR value to seconds */
|
|
static const u8 power_limit_time_msr_to_sec[] = {
|
|
[0x00] = 0,
|
|
[0x0a] = 1,
|
|
[0x0b] = 2,
|
|
[0x4b] = 3,
|
|
[0x0c] = 4,
|
|
[0x2c] = 5,
|
|
[0x4c] = 6,
|
|
[0x6c] = 7,
|
|
[0x0d] = 8,
|
|
[0x2d] = 10,
|
|
[0x4d] = 12,
|
|
[0x6d] = 14,
|
|
[0x0e] = 16,
|
|
[0x2e] = 20,
|
|
[0x4e] = 24,
|
|
[0x6e] = 28,
|
|
[0x0f] = 32,
|
|
[0x2f] = 40,
|
|
[0x4f] = 48,
|
|
[0x6f] = 56,
|
|
[0x10] = 64,
|
|
[0x30] = 80,
|
|
[0x50] = 96,
|
|
[0x70] = 112,
|
|
[0x11] = 128,
|
|
};
|
|
|
|
int cpu_config_tdp_levels(void)
|
|
{
|
|
struct cpuid_result result;
|
|
msr_t platform_info;
|
|
|
|
/* Minimum CPU revision */
|
|
result = cpuid(1);
|
|
if (result.eax < IVB_CONFIG_TDP_MIN_CPUID)
|
|
return 0;
|
|
|
|
/* Bits 34:33 indicate how many levels supported */
|
|
platform_info = msr_read(MSR_PLATFORM_INFO);
|
|
return (platform_info.hi >> 1) & 3;
|
|
}
|
|
|
|
/*
|
|
* Configure processor power limits if possible
|
|
* This must be done AFTER set of BIOS_RESET_CPL
|
|
*/
|
|
void set_power_limits(u8 power_limit_1_time)
|
|
{
|
|
msr_t msr = msr_read(MSR_PLATFORM_INFO);
|
|
msr_t limit;
|
|
unsigned power_unit;
|
|
unsigned tdp, min_power, max_power, max_time;
|
|
u8 power_limit_1_val;
|
|
|
|
if (power_limit_1_time > ARRAY_SIZE(power_limit_time_sec_to_msr))
|
|
return;
|
|
|
|
if (!(msr.lo & PLATFORM_INFO_SET_TDP))
|
|
return;
|
|
|
|
/* Get units */
|
|
msr = msr_read(MSR_PKG_POWER_SKU_UNIT);
|
|
power_unit = 2 << ((msr.lo & 0xf) - 1);
|
|
|
|
/* Get power defaults for this SKU */
|
|
msr = msr_read(MSR_PKG_POWER_SKU);
|
|
tdp = msr.lo & 0x7fff;
|
|
min_power = (msr.lo >> 16) & 0x7fff;
|
|
max_power = msr.hi & 0x7fff;
|
|
max_time = (msr.hi >> 16) & 0x7f;
|
|
|
|
debug("CPU TDP: %u Watts\n", tdp / power_unit);
|
|
|
|
if (power_limit_time_msr_to_sec[max_time] > power_limit_1_time)
|
|
power_limit_1_time = power_limit_time_msr_to_sec[max_time];
|
|
|
|
if (min_power > 0 && tdp < min_power)
|
|
tdp = min_power;
|
|
|
|
if (max_power > 0 && tdp > max_power)
|
|
tdp = max_power;
|
|
|
|
power_limit_1_val = power_limit_time_sec_to_msr[power_limit_1_time];
|
|
|
|
/* Set long term power limit to TDP */
|
|
limit.lo = 0;
|
|
limit.lo |= tdp & PKG_POWER_LIMIT_MASK;
|
|
limit.lo |= PKG_POWER_LIMIT_EN;
|
|
limit.lo |= (power_limit_1_val & PKG_POWER_LIMIT_TIME_MASK) <<
|
|
PKG_POWER_LIMIT_TIME_SHIFT;
|
|
|
|
/* Set short term power limit to 1.25 * TDP */
|
|
limit.hi = 0;
|
|
limit.hi |= ((tdp * 125) / 100) & PKG_POWER_LIMIT_MASK;
|
|
limit.hi |= PKG_POWER_LIMIT_EN;
|
|
/* Power limit 2 time is only programmable on SNB EP/EX */
|
|
|
|
msr_write(MSR_PKG_POWER_LIMIT, limit);
|
|
|
|
/* Use nominal TDP values for CPUs with configurable TDP */
|
|
if (cpu_config_tdp_levels()) {
|
|
msr = msr_read(MSR_CONFIG_TDP_NOMINAL);
|
|
limit.hi = 0;
|
|
limit.lo = msr.lo & 0xff;
|
|
msr_write(MSR_TURBO_ACTIVATION_RATIO, limit);
|
|
}
|
|
}
|
|
|
|
static void configure_c_states(void)
|
|
{
|
|
struct cpuid_result result;
|
|
msr_t msr;
|
|
|
|
msr = msr_read(MSR_PMG_CST_CONFIG_CTL);
|
|
msr.lo |= (1 << 28); /* C1 Auto Undemotion Enable */
|
|
msr.lo |= (1 << 27); /* C3 Auto Undemotion Enable */
|
|
msr.lo |= (1 << 26); /* C1 Auto Demotion Enable */
|
|
msr.lo |= (1 << 25); /* C3 Auto Demotion Enable */
|
|
msr.lo &= ~(1 << 10); /* Disable IO MWAIT redirection */
|
|
msr.lo |= 7; /* No package C-state limit */
|
|
msr_write(MSR_PMG_CST_CONFIG_CTL, msr);
|
|
|
|
msr = msr_read(MSR_PMG_IO_CAPTURE_ADR);
|
|
msr.lo &= ~0x7ffff;
|
|
msr.lo |= (PMB0_BASE + 4); /* LVL_2 base address */
|
|
msr.lo |= (2 << 16); /* CST Range: C7 is max C-state */
|
|
msr_write(MSR_PMG_IO_CAPTURE_ADR, msr);
|
|
|
|
msr = msr_read(MSR_MISC_PWR_MGMT);
|
|
msr.lo &= ~(1 << 0); /* Enable P-state HW_ALL coordination */
|
|
msr_write(MSR_MISC_PWR_MGMT, msr);
|
|
|
|
msr = msr_read(MSR_POWER_CTL);
|
|
msr.lo |= (1 << 18); /* Enable Energy Perf Bias MSR 0x1b0 */
|
|
msr.lo |= (1 << 1); /* C1E Enable */
|
|
msr.lo |= (1 << 0); /* Bi-directional PROCHOT# */
|
|
msr_write(MSR_POWER_CTL, msr);
|
|
|
|
/* C3 Interrupt Response Time Limit */
|
|
msr.hi = 0;
|
|
msr.lo = IRTL_VALID | IRTL_1024_NS | 0x50;
|
|
msr_write(MSR_PKGC3_IRTL, msr);
|
|
|
|
/* C6 Interrupt Response Time Limit */
|
|
msr.hi = 0;
|
|
msr.lo = IRTL_VALID | IRTL_1024_NS | 0x68;
|
|
msr_write(MSR_PKGC6_IRTL, msr);
|
|
|
|
/* C7 Interrupt Response Time Limit */
|
|
msr.hi = 0;
|
|
msr.lo = IRTL_VALID | IRTL_1024_NS | 0x6D;
|
|
msr_write(MSR_PKGC7_IRTL, msr);
|
|
|
|
/* Primary Plane Current Limit */
|
|
msr = msr_read(MSR_PP0_CURRENT_CONFIG);
|
|
msr.lo &= ~0x1fff;
|
|
msr.lo |= PP0_CURRENT_LIMIT;
|
|
msr_write(MSR_PP0_CURRENT_CONFIG, msr);
|
|
|
|
/* Secondary Plane Current Limit */
|
|
msr = msr_read(MSR_PP1_CURRENT_CONFIG);
|
|
msr.lo &= ~0x1fff;
|
|
result = cpuid(1);
|
|
if (result.eax >= 0x30600)
|
|
msr.lo |= PP1_CURRENT_LIMIT_IVB;
|
|
else
|
|
msr.lo |= PP1_CURRENT_LIMIT_SNB;
|
|
msr_write(MSR_PP1_CURRENT_CONFIG, msr);
|
|
}
|
|
|
|
static int configure_thermal_target(struct udevice *dev)
|
|
{
|
|
int tcc_offset;
|
|
msr_t msr;
|
|
|
|
tcc_offset = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
|
|
"tcc-offset", 0);
|
|
|
|
/* Set TCC activaiton offset if supported */
|
|
msr = msr_read(MSR_PLATFORM_INFO);
|
|
if ((msr.lo & (1 << 30)) && tcc_offset) {
|
|
msr = msr_read(MSR_TEMPERATURE_TARGET);
|
|
msr.lo &= ~(0xf << 24); /* Bits 27:24 */
|
|
msr.lo |= (tcc_offset & 0xf) << 24;
|
|
msr_write(MSR_TEMPERATURE_TARGET, msr);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void configure_misc(void)
|
|
{
|
|
msr_t msr;
|
|
|
|
msr = msr_read(IA32_MISC_ENABLE);
|
|
msr.lo |= (1 << 0); /* Fast String enable */
|
|
msr.lo |= (1 << 3); /* TM1/TM2/EMTTM enable */
|
|
msr.lo |= (1 << 16); /* Enhanced SpeedStep Enable */
|
|
msr_write(IA32_MISC_ENABLE, msr);
|
|
|
|
/* Disable Thermal interrupts */
|
|
msr.lo = 0;
|
|
msr.hi = 0;
|
|
msr_write(IA32_THERM_INTERRUPT, msr);
|
|
|
|
/* Enable package critical interrupt only */
|
|
msr.lo = 1 << 4;
|
|
msr.hi = 0;
|
|
msr_write(IA32_PACKAGE_THERM_INTERRUPT, msr);
|
|
}
|
|
|
|
static void enable_lapic_tpr(void)
|
|
{
|
|
msr_t msr;
|
|
|
|
msr = msr_read(MSR_PIC_MSG_CONTROL);
|
|
msr.lo &= ~(1 << 10); /* Enable APIC TPR updates */
|
|
msr_write(MSR_PIC_MSG_CONTROL, msr);
|
|
}
|
|
|
|
static void configure_dca_cap(void)
|
|
{
|
|
struct cpuid_result cpuid_regs;
|
|
msr_t msr;
|
|
|
|
/* Check feature flag in CPUID.(EAX=1):ECX[18]==1 */
|
|
cpuid_regs = cpuid(1);
|
|
if (cpuid_regs.ecx & (1 << 18)) {
|
|
msr = msr_read(IA32_PLATFORM_DCA_CAP);
|
|
msr.lo |= 1;
|
|
msr_write(IA32_PLATFORM_DCA_CAP, msr);
|
|
}
|
|
}
|
|
|
|
static void set_max_ratio(void)
|
|
{
|
|
msr_t msr, perf_ctl;
|
|
|
|
perf_ctl.hi = 0;
|
|
|
|
/* Check for configurable TDP option */
|
|
if (cpu_config_tdp_levels()) {
|
|
/* Set to nominal TDP ratio */
|
|
msr = msr_read(MSR_CONFIG_TDP_NOMINAL);
|
|
perf_ctl.lo = (msr.lo & 0xff) << 8;
|
|
} else {
|
|
/* Platform Info bits 15:8 give max ratio */
|
|
msr = msr_read(MSR_PLATFORM_INFO);
|
|
perf_ctl.lo = msr.lo & 0xff00;
|
|
}
|
|
msr_write(MSR_IA32_PERF_CTL, perf_ctl);
|
|
|
|
debug("model_x06ax: frequency set to %d\n",
|
|
((perf_ctl.lo >> 8) & 0xff) * SANDYBRIDGE_BCLK);
|
|
}
|
|
|
|
static void set_energy_perf_bias(u8 policy)
|
|
{
|
|
msr_t msr;
|
|
|
|
/* Energy Policy is bits 3:0 */
|
|
msr = msr_read(IA32_ENERGY_PERFORMANCE_BIAS);
|
|
msr.lo &= ~0xf;
|
|
msr.lo |= policy & 0xf;
|
|
msr_write(IA32_ENERGY_PERFORMANCE_BIAS, msr);
|
|
|
|
debug("model_x06ax: energy policy set to %u\n", policy);
|
|
}
|
|
|
|
static void configure_mca(void)
|
|
{
|
|
msr_t msr;
|
|
int i;
|
|
|
|
msr.lo = 0;
|
|
msr.hi = 0;
|
|
/* This should only be done on a cold boot */
|
|
for (i = 0; i < 7; i++)
|
|
msr_write(IA32_MC0_STATUS + (i * 4), msr);
|
|
}
|
|
|
|
#if CONFIG_USBDEBUG
|
|
static unsigned ehci_debug_addr;
|
|
#endif
|
|
|
|
static int model_206ax_init(struct udevice *dev)
|
|
{
|
|
int ret;
|
|
|
|
/* Clear out pending MCEs */
|
|
configure_mca();
|
|
|
|
#if CONFIG_USBDEBUG
|
|
/* Is this caution really needed? */
|
|
if (!ehci_debug_addr)
|
|
ehci_debug_addr = get_ehci_debug();
|
|
set_ehci_debug(0);
|
|
#endif
|
|
|
|
#if CONFIG_USBDEBUG
|
|
set_ehci_debug(ehci_debug_addr);
|
|
#endif
|
|
|
|
/* Enable the local cpu apics */
|
|
enable_lapic_tpr();
|
|
|
|
/* Enable virtualization if enabled in CMOS */
|
|
enable_vmx();
|
|
|
|
/* Configure C States */
|
|
configure_c_states();
|
|
|
|
/* Configure Enhanced SpeedStep and Thermal Sensors */
|
|
configure_misc();
|
|
|
|
/* Thermal throttle activation offset */
|
|
ret = configure_thermal_target(dev);
|
|
if (ret) {
|
|
debug("Cannot set thermal target\n");
|
|
return ret;
|
|
}
|
|
|
|
/* Enable Direct Cache Access */
|
|
configure_dca_cap();
|
|
|
|
/* Set energy policy */
|
|
set_energy_perf_bias(ENERGY_POLICY_NORMAL);
|
|
|
|
/* Set Max Ratio */
|
|
set_max_ratio();
|
|
|
|
/* Enable Turbo */
|
|
turbo_enable();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int model_206ax_get_info(struct udevice *dev, struct cpu_info *info)
|
|
{
|
|
msr_t msr;
|
|
|
|
msr = msr_read(MSR_IA32_PERF_CTL);
|
|
info->cpu_freq = ((msr.lo >> 8) & 0xff) * SANDYBRIDGE_BCLK * 1000000;
|
|
info->features = 1 << CPU_FEAT_L1_CACHE | 1 << CPU_FEAT_MMU |
|
|
1 << CPU_FEAT_UCODE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int model_206ax_get_count(struct udevice *dev)
|
|
{
|
|
return 4;
|
|
}
|
|
|
|
static int cpu_x86_model_206ax_probe(struct udevice *dev)
|
|
{
|
|
if (dev->seq == 0)
|
|
model_206ax_init(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct cpu_ops cpu_x86_model_206ax_ops = {
|
|
.get_desc = cpu_x86_get_desc,
|
|
.get_info = model_206ax_get_info,
|
|
.get_count = model_206ax_get_count,
|
|
.get_vendor = cpu_x86_get_vendor,
|
|
};
|
|
|
|
static const struct udevice_id cpu_x86_model_206ax_ids[] = {
|
|
{ .compatible = "intel,core-gen3" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(cpu_x86_model_206ax_drv) = {
|
|
.name = "cpu_x86_model_206ax",
|
|
.id = UCLASS_CPU,
|
|
.of_match = cpu_x86_model_206ax_ids,
|
|
.bind = cpu_x86_bind,
|
|
.probe = cpu_x86_model_206ax_probe,
|
|
.ops = &cpu_x86_model_206ax_ops,
|
|
};
|