mirror of
https://github.com/AsahiLinux/u-boot
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12c81b2f41
When TPL is running, broadwell needs to do different init from SPL. There is no need for this code to be in the generic x86 SPL file, so move it to arch_cpu_init(). Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
113 lines
2.1 KiB
C
113 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2016 Google, Inc
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*
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* Based on code from coreboot src/soc/intel/broadwell/cpu.c
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*/
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#include <common.h>
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#include <dm.h>
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#include <cpu.h>
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#include <asm/cpu.h>
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#include <asm/cpu_x86.h>
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#include <asm/cpu_common.h>
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#include <asm/intel_regs.h>
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#include <asm/lpc_common.h>
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#include <asm/msr.h>
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#include <asm/pci.h>
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#include <asm/post.h>
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#include <asm/turbo.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/pch.h>
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#include <asm/arch/rcb.h>
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int arch_cpu_init_dm(void)
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{
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struct udevice *dev;
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int ret;
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/* Start up the LPC so we have serial */
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ret = uclass_first_device(UCLASS_LPC, &dev);
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if (ret)
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return ret;
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if (!dev)
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return -ENODEV;
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ret = cpu_set_flex_ratio_to_tdp_nominal();
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if (ret)
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return ret;
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return 0;
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}
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void set_max_freq(void)
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{
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msr_t msr, perf_ctl, platform_info;
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/* Check for configurable TDP option */
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platform_info = msr_read(MSR_PLATFORM_INFO);
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if ((platform_info.hi >> 1) & 3) {
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/* Set to nominal TDP ratio */
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msr = msr_read(MSR_CONFIG_TDP_NOMINAL);
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perf_ctl.lo = (msr.lo & 0xff) << 8;
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} else {
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/* Platform Info bits 15:8 give max ratio */
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msr = msr_read(MSR_PLATFORM_INFO);
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perf_ctl.lo = msr.lo & 0xff00;
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}
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perf_ctl.hi = 0;
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msr_write(IA32_PERF_CTL, perf_ctl);
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debug("CPU: frequency set to %d MHz\n",
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((perf_ctl.lo >> 8) & 0xff) * CPU_BCLK);
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}
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int arch_cpu_init(void)
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{
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post_code(POST_CPU_INIT);
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#ifdef CONFIG_TPL
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/* Do a mini-init if TPL has already done the full init */
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return x86_cpu_reinit_f();
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#else
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return x86_cpu_init_f();
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#endif
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}
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int checkcpu(void)
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{
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int ret;
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set_max_freq();
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ret = cpu_common_init();
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if (ret)
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return ret;
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gd->arch.pei_boot_mode = PEI_BOOT_NONE;
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return 0;
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}
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int print_cpuinfo(void)
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{
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char processor_name[CPU_MAX_NAME_LEN];
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const char *name;
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/* Print processor name */
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name = cpu_get_name(processor_name);
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printf("CPU: %s\n", name);
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return 0;
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}
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void board_debug_uart_init(void)
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{
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struct udevice *bus = NULL;
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/* com1 / com2 decode range */
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pci_x86_write_config(bus, PCH_DEV_LPC, LPC_IO_DEC, 1 << 4, PCI_SIZE_16);
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pci_x86_write_config(bus, PCH_DEV_LPC, LPC_EN, COMA_LPC_EN,
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PCI_SIZE_16);
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}
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