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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2016 Google, Inc
*
* Based on code from coreboot src/soc/intel/broadwell/cpu.c
*/
#include <common.h>
#include <dm.h>
#include <cpu.h>
#include <asm/cpu.h>
#include <asm/cpu_x86.h>
#include <asm/cpu_common.h>
#include <asm/intel_regs.h>
#include <asm/lpc_common.h>
#include <asm/msr.h>
#include <asm/pci.h>
#include <asm/post.h>
#include <asm/turbo.h>
#include <asm/arch/cpu.h>
#include <asm/arch/pch.h>
#include <asm/arch/rcb.h>
int arch_cpu_init_dm(void)
{
struct udevice *dev;
int ret;
/* Start up the LPC so we have serial */
ret = uclass_first_device(UCLASS_LPC, &dev);
if (ret)
return ret;
if (!dev)
return -ENODEV;
ret = cpu_set_flex_ratio_to_tdp_nominal();
if (ret)
return ret;
return 0;
}
void set_max_freq(void)
{
msr_t msr, perf_ctl;
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;
}
perf_ctl.hi = 0;
msr_write(MSR_IA32_PERF_CTL, perf_ctl);
debug("CPU: frequency set to %d MHz\n",
((perf_ctl.lo >> 8) & 0xff) * INTEL_BCLK_MHZ);
}
int arch_cpu_init(void)
{
post_code(POST_CPU_INIT);
#ifdef CONFIG_TPL
/* Do a mini-init if TPL has already done the full init */
return x86_cpu_reinit_f();
#else
return x86_cpu_init_f();
#endif
}
int checkcpu(void)
{
int ret;
set_max_freq();
ret = cpu_common_init();
if (ret)
return ret;
gd->arch.pei_boot_mode = PEI_BOOT_NONE;
return 0;
}
int print_cpuinfo(void)
{
char processor_name[CPU_MAX_NAME_LEN];
const char *name;
/* Print processor name */
name = cpu_get_name(processor_name);
printf("CPU: %s\n", name);
return 0;
}
void board_debug_uart_init(void)
{
/* com1 / com2 decode range */
pci_x86_write_config(PCH_DEV_LPC, LPC_IO_DEC, 1 << 4, PCI_SIZE_16);
pci_x86_write_config(PCH_DEV_LPC, LPC_EN, COMA_LPC_EN, PCI_SIZE_16);
}
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