]> Git Repo - J-u-boot.git/blob - arch/x86/cpu/broadwell/cpu.c
Merge tag 'x86-pull-20230922' of https://source.denx.de/u-boot/custodians/u-boot...
[J-u-boot.git] / arch / x86 / cpu / broadwell / cpu.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2016 Google, Inc
4  *
5  * Based on code from coreboot src/soc/intel/broadwell/cpu.c
6  */
7
8 #include <common.h>
9 #include <dm.h>
10 #include <cpu.h>
11 #include <event.h>
12 #include <init.h>
13 #include <log.h>
14 #include <spl.h>
15 #include <asm/cpu.h>
16 #include <asm/cpu_x86.h>
17 #include <asm/cpu_common.h>
18 #include <asm/global_data.h>
19 #include <asm/intel_regs.h>
20 #include <asm/lpc_common.h>
21 #include <asm/msr.h>
22 #include <asm/pci.h>
23 #include <asm/post.h>
24 #include <asm/turbo.h>
25 #include <asm/arch/cpu.h>
26 #include <asm/arch/pch.h>
27 #include <asm/arch/rcb.h>
28
29 static int broadwell_init_cpu(void)
30 {
31         struct udevice *dev;
32         int ret;
33
34         /* Start up the LPC so we have serial */
35         ret = uclass_first_device_err(UCLASS_LPC, &dev);
36         if (ret)
37                 return ret;
38         ret = cpu_set_flex_ratio_to_tdp_nominal();
39         if (ret)
40                 return ret;
41
42         return 0;
43 }
44 EVENT_SPY_SIMPLE(EVT_DM_POST_INIT_F, broadwell_init_cpu);
45
46 void set_max_freq(void)
47 {
48         msr_t msr, perf_ctl;
49
50         if (cpu_config_tdp_levels()) {
51                 /* Set to nominal TDP ratio */
52                 msr = msr_read(MSR_CONFIG_TDP_NOMINAL);
53                 perf_ctl.lo = (msr.lo & 0xff) << 8;
54         } else {
55                 /* Platform Info bits 15:8 give max ratio */
56                 msr = msr_read(MSR_PLATFORM_INFO);
57                 perf_ctl.lo = msr.lo & 0xff00;
58         }
59
60         perf_ctl.hi = 0;
61         msr_write(MSR_IA32_PERF_CTL, perf_ctl);
62
63         debug("CPU: frequency set to %d MHz\n",
64               ((perf_ctl.lo >> 8) & 0xff) * INTEL_BCLK_MHZ);
65 }
66
67 int arch_cpu_init(void)
68 {
69         post_code(POST_CPU_INIT);
70
71         /* Do a mini-init if TPL has already done the full init */
72         if (IS_ENABLED(CONFIG_TPL) && spl_phase() != PHASE_TPL)
73                 return x86_cpu_reinit_f();
74         else
75                 return x86_cpu_init_f();
76 }
77
78 int checkcpu(void)
79 {
80         int ret;
81
82         set_max_freq();
83
84         ret = cpu_common_init();
85         if (ret)
86                 return ret;
87         gd->arch.pei_boot_mode = PEI_BOOT_NONE;
88
89         return 0;
90 }
91
92 int print_cpuinfo(void)
93 {
94         char processor_name[CPU_MAX_NAME_LEN];
95         const char *name;
96
97         /* Print processor name */
98         name = cpu_get_name(processor_name);
99         printf("CPU:   %s\n", name);
100
101         return 0;
102 }
103
104 void board_debug_uart_init(void)
105 {
106         /* com1 / com2 decode range */
107         pci_x86_write_config(PCH_DEV_LPC, LPC_IO_DEC, 1 << 4, PCI_SIZE_16);
108
109         pci_x86_write_config(PCH_DEV_LPC, LPC_EN, COMA_LPC_EN, PCI_SIZE_16);
110 }
This page took 0.03122 seconds and 4 git commands to generate.