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/* SPDX-License-Identifier: GPL-2.0-only */
#include <stdint.h>
#include <symbols.h>
#include <amdblocks/reset.h>
#include <bootblock_common.h>
#include <console/console.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/msr.h>
#include <cpu/amd/msr.h>
#include <cpu/x86/mtrr.h>
#include <cpu/amd/mtrr.h>
#include <cpu/x86/tsc.h>
#include <pc80/mc146818rtc.h>
#include <soc/psp_transfer.h>
#include <soc/southbridge.h>
#include <soc/i2c.h>
#include <amdblocks/amd_pci_mmconf.h>
#include <acpi/acpi.h>
asmlinkage void bootblock_resume_entry(void);
/* PSP performs the memory training and setting up DRAM map prior to x86 cores
being released. Honor TOP_MEM and set up caching from 0 til TOP_MEM. Likewise,
route lower memory addresses covered by fixed MTRRs to DRAM except for
0xa0000-0xc0000 . */
static void set_caching(void)
{
msr_t top_mem;
msr_t sys_cfg;
msr_t mtrr_def_type;
msr_t fixed_mtrr_ram;
msr_t fixed_mtrr_mmio;
struct var_mtrr_context mtrr_ctx;
var_mtrr_context_init(&mtrr_ctx, NULL);
top_mem = rdmsr(TOP_MEM);
/* Enable RdDram and WrDram attributes in fixed MTRRs. */
sys_cfg = rdmsr(SYSCFG_MSR);
sys_cfg.lo |= SYSCFG_MSR_MtrrFixDramModEn;
/* Fixed MTRR constants. */
fixed_mtrr_ram.lo = fixed_mtrr_ram.hi =
((MTRR_TYPE_WRBACK | MTRR_READ_MEM | MTRR_WRITE_MEM) << 0) |
((MTRR_TYPE_WRBACK | MTRR_READ_MEM | MTRR_WRITE_MEM) << 8) |
((MTRR_TYPE_WRBACK | MTRR_READ_MEM | MTRR_WRITE_MEM) << 16) |
((MTRR_TYPE_WRBACK | MTRR_READ_MEM | MTRR_WRITE_MEM) << 24);
fixed_mtrr_mmio.lo = fixed_mtrr_mmio.hi =
((MTRR_TYPE_UNCACHEABLE) << 0) |
((MTRR_TYPE_UNCACHEABLE) << 8) |
((MTRR_TYPE_UNCACHEABLE) << 16) |
((MTRR_TYPE_UNCACHEABLE) << 24);
/* Prep default MTRR type. */
mtrr_def_type = rdmsr(MTRR_DEF_TYPE_MSR);
mtrr_def_type.lo &= ~MTRR_DEF_TYPE_MASK;
mtrr_def_type.lo |= MTRR_TYPE_UNCACHEABLE;
mtrr_def_type.lo |= MTRR_DEF_TYPE_EN | MTRR_DEF_TYPE_FIX_EN;
disable_cache();
wrmsr(SYSCFG_MSR, sys_cfg);
clear_all_var_mtrr();
var_mtrr_set(&mtrr_ctx, 0, ALIGN_DOWN(top_mem.lo, 8*MiB), MTRR_TYPE_WRBACK);
var_mtrr_set(&mtrr_ctx, FLASH_BASE_ADDR, CONFIG_ROM_SIZE, MTRR_TYPE_WRPROT);
/* Set up RAM caching for everything below 1MiB except for 0xa0000-0xc0000 . */
wrmsr(MTRR_FIX_64K_00000, fixed_mtrr_ram);
wrmsr(MTRR_FIX_16K_80000, fixed_mtrr_ram);
wrmsr(MTRR_FIX_16K_A0000, fixed_mtrr_mmio);
wrmsr(MTRR_FIX_4K_C0000, fixed_mtrr_ram);
wrmsr(MTRR_FIX_4K_C8000, fixed_mtrr_ram);
wrmsr(MTRR_FIX_4K_D0000, fixed_mtrr_ram);
wrmsr(MTRR_FIX_4K_D8000, fixed_mtrr_ram);
wrmsr(MTRR_FIX_4K_E0000, fixed_mtrr_ram);
wrmsr(MTRR_FIX_4K_E8000, fixed_mtrr_ram);
wrmsr(MTRR_FIX_4K_F0000, fixed_mtrr_ram);
wrmsr(MTRR_FIX_4K_F8000, fixed_mtrr_ram);
wrmsr(MTRR_DEF_TYPE_MSR, mtrr_def_type);
/* Enable Fixed and Variable MTRRs. */
sys_cfg.lo |= SYSCFG_MSR_MtrrFixDramEn | SYSCFG_MSR_MtrrVarDramEn;
sys_cfg.lo |= SYSCFG_MSR_TOM2En | SYSCFG_MSR_TOM2WB;
/* AGESA currently expects SYSCFG_MSR_MtrrFixDramModEn to be set. Once
MP init happens in coreboot proper it can be knocked down. */
wrmsr(SYSCFG_MSR, sys_cfg);
enable_cache();
}
static void write_resume_eip(void)
{
msr_t s3_resume_entry = {
.hi = (uint64_t)(uintptr_t)bootblock_resume_entry >> 32,
.lo = (uintptr_t)bootblock_resume_entry & 0xffffffff,
};
/*
* Writing to the EIP register can only be done once, otherwise a fault is triggered.
* When this register is written, it will trigger the microcode to stash the CPU state
* (crX , mtrrs, registers, etc) into the CC6 save area. On resume, the state will be
* restored and execution will continue at the EIP.
*/
if (!acpi_is_wakeup_s3())
wrmsr(S3_RESUME_EIP_MSR, s3_resume_entry);
}
asmlinkage void bootblock_c_entry(uint64_t base_timestamp)
{
set_caching();
write_resume_eip();
enable_pci_mmconf();
/*
* base_timestamp is raw tsc value. We need to divide by tsc_freq_mhz
* when we use micro-seconds granularity for Zork
*/
base_timestamp /= tsc_freq_mhz();
if (CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK))
boot_with_psp_timestamp(base_timestamp);
/*
* if VBOOT_STARTS_BEFORE_BOOTBLOCK is not selected or
* previous step did nothing, proceed with normal bootblock main.
*/
bootblock_main_with_basetime(base_timestamp);
}
void bootblock_soc_early_init(void)
{
fch_pre_init();
}
void bootblock_soc_init(void)
{
u32 val = cpuid_eax(1);
printk(BIOS_DEBUG, "Family_Model: %08x\n", val);
if (CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK)) {
verify_psp_transfer_buf();
show_psp_transfer_info();
}
fch_early_init();
}
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