xref: /openbmc/u-boot/arch/x86/cpu/cpu.c (revision 2ae23a28)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2008-2011
4  * Graeme Russ, <graeme.russ@gmail.com>
5  *
6  * (C) Copyright 2002
7  * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
8  *
9  * (C) Copyright 2002
10  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
11  * Marius Groeger <mgroeger@sysgo.de>
12  *
13  * (C) Copyright 2002
14  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
15  * Alex Zuepke <azu@sysgo.de>
16  *
17  * Part of this file is adapted from coreboot
18  * src/arch/x86/lib/cpu.c
19  */
20 
21 #include <common.h>
22 #include <command.h>
23 #include <dm.h>
24 #include <errno.h>
25 #include <malloc.h>
26 #include <syscon.h>
27 #include <asm/acpi.h>
28 #include <asm/acpi_s3.h>
29 #include <asm/acpi_table.h>
30 #include <asm/control_regs.h>
31 #include <asm/coreboot_tables.h>
32 #include <asm/cpu.h>
33 #include <asm/lapic.h>
34 #include <asm/microcode.h>
35 #include <asm/mp.h>
36 #include <asm/mrccache.h>
37 #include <asm/msr.h>
38 #include <asm/mtrr.h>
39 #include <asm/post.h>
40 #include <asm/processor.h>
41 #include <asm/processor-flags.h>
42 #include <asm/interrupt.h>
43 #include <asm/tables.h>
44 #include <linux/compiler.h>
45 
46 DECLARE_GLOBAL_DATA_PTR;
47 
48 static const char *const x86_vendor_name[] = {
49 	[X86_VENDOR_INTEL]     = "Intel",
50 	[X86_VENDOR_CYRIX]     = "Cyrix",
51 	[X86_VENDOR_AMD]       = "AMD",
52 	[X86_VENDOR_UMC]       = "UMC",
53 	[X86_VENDOR_NEXGEN]    = "NexGen",
54 	[X86_VENDOR_CENTAUR]   = "Centaur",
55 	[X86_VENDOR_RISE]      = "Rise",
56 	[X86_VENDOR_TRANSMETA] = "Transmeta",
57 	[X86_VENDOR_NSC]       = "NSC",
58 	[X86_VENDOR_SIS]       = "SiS",
59 };
60 
x86_cleanup_before_linux(void)61 int __weak x86_cleanup_before_linux(void)
62 {
63 #ifdef CONFIG_BOOTSTAGE_STASH
64 	bootstage_stash((void *)CONFIG_BOOTSTAGE_STASH_ADDR,
65 			CONFIG_BOOTSTAGE_STASH_SIZE);
66 #endif
67 
68 	return 0;
69 }
70 
x86_init_cache(void)71 int x86_init_cache(void)
72 {
73 	enable_caches();
74 
75 	return 0;
76 }
77 int init_cache(void) __attribute__((weak, alias("x86_init_cache")));
78 
flush_cache(unsigned long dummy1,unsigned long dummy2)79 void  flush_cache(unsigned long dummy1, unsigned long dummy2)
80 {
81 	asm("wbinvd\n");
82 }
83 
84 /* Define these functions to allow ehch-hcd to function */
flush_dcache_range(unsigned long start,unsigned long stop)85 void flush_dcache_range(unsigned long start, unsigned long stop)
86 {
87 }
88 
invalidate_dcache_range(unsigned long start,unsigned long stop)89 void invalidate_dcache_range(unsigned long start, unsigned long stop)
90 {
91 }
92 
dcache_enable(void)93 void dcache_enable(void)
94 {
95 	enable_caches();
96 }
97 
dcache_disable(void)98 void dcache_disable(void)
99 {
100 	disable_caches();
101 }
102 
icache_enable(void)103 void icache_enable(void)
104 {
105 }
106 
icache_disable(void)107 void icache_disable(void)
108 {
109 }
110 
icache_status(void)111 int icache_status(void)
112 {
113 	return 1;
114 }
115 
cpu_vendor_name(int vendor)116 const char *cpu_vendor_name(int vendor)
117 {
118 	const char *name;
119 	name = "<invalid cpu vendor>";
120 	if (vendor < ARRAY_SIZE(x86_vendor_name) &&
121 	    x86_vendor_name[vendor])
122 		name = x86_vendor_name[vendor];
123 
124 	return name;
125 }
126 
cpu_get_name(char * name)127 char *cpu_get_name(char *name)
128 {
129 	unsigned int *name_as_ints = (unsigned int *)name;
130 	struct cpuid_result regs;
131 	char *ptr;
132 	int i;
133 
134 	/* This bit adds up to 48 bytes */
135 	for (i = 0; i < 3; i++) {
136 		regs = cpuid(0x80000002 + i);
137 		name_as_ints[i * 4 + 0] = regs.eax;
138 		name_as_ints[i * 4 + 1] = regs.ebx;
139 		name_as_ints[i * 4 + 2] = regs.ecx;
140 		name_as_ints[i * 4 + 3] = regs.edx;
141 	}
142 	name[CPU_MAX_NAME_LEN - 1] = '\0';
143 
144 	/* Skip leading spaces. */
145 	ptr = name;
146 	while (*ptr == ' ')
147 		ptr++;
148 
149 	return ptr;
150 }
151 
default_print_cpuinfo(void)152 int default_print_cpuinfo(void)
153 {
154 	printf("CPU: %s, vendor %s, device %xh\n",
155 	       cpu_has_64bit() ? "x86_64" : "x86",
156 	       cpu_vendor_name(gd->arch.x86_vendor), gd->arch.x86_device);
157 
158 #ifdef CONFIG_HAVE_ACPI_RESUME
159 	debug("ACPI previous sleep state: %s\n",
160 	      acpi_ss_string(gd->arch.prev_sleep_state));
161 #endif
162 
163 	return 0;
164 }
165 
show_boot_progress(int val)166 void show_boot_progress(int val)
167 {
168 	outb(val, POST_PORT);
169 }
170 
171 #if !defined(CONFIG_SYS_COREBOOT) && !defined(CONFIG_EFI_STUB)
172 /*
173  * Implement a weak default function for boards that optionally
174  * need to clean up the system before jumping to the kernel.
175  */
board_final_cleanup(void)176 __weak void board_final_cleanup(void)
177 {
178 }
179 
last_stage_init(void)180 int last_stage_init(void)
181 {
182 	struct acpi_fadt __maybe_unused *fadt;
183 
184 	board_final_cleanup();
185 
186 #ifdef CONFIG_HAVE_ACPI_RESUME
187 	fadt = acpi_find_fadt();
188 
189 	if (fadt && gd->arch.prev_sleep_state == ACPI_S3)
190 		acpi_resume(fadt);
191 #endif
192 
193 	write_tables();
194 
195 #ifdef CONFIG_GENERATE_ACPI_TABLE
196 	fadt = acpi_find_fadt();
197 
198 	/* Don't touch ACPI hardware on HW reduced platforms */
199 	if (fadt && !(fadt->flags & ACPI_FADT_HW_REDUCED_ACPI)) {
200 		/*
201 		 * Other than waiting for OSPM to request us to switch to ACPI
202 		 * mode, do it by ourselves, since SMI will not be triggered.
203 		 */
204 		enter_acpi_mode(fadt->pm1a_cnt_blk);
205 	}
206 #endif
207 
208 	return 0;
209 }
210 #endif
211 
x86_init_cpus(void)212 static int x86_init_cpus(void)
213 {
214 #ifdef CONFIG_SMP
215 	debug("Init additional CPUs\n");
216 	x86_mp_init();
217 #else
218 	struct udevice *dev;
219 
220 	/*
221 	 * This causes the cpu-x86 driver to be probed.
222 	 * We don't check return value here as we want to allow boards
223 	 * which have not been converted to use cpu uclass driver to boot.
224 	 */
225 	uclass_first_device(UCLASS_CPU, &dev);
226 #endif
227 
228 	return 0;
229 }
230 
cpu_init_r(void)231 int cpu_init_r(void)
232 {
233 	struct udevice *dev;
234 	int ret;
235 
236 	if (!ll_boot_init())
237 		return 0;
238 
239 	ret = x86_init_cpus();
240 	if (ret)
241 		return ret;
242 
243 	/*
244 	 * Set up the northbridge, PCH and LPC if available. Note that these
245 	 * may have had some limited pre-relocation init if they were probed
246 	 * before relocation, but this is post relocation.
247 	 */
248 	uclass_first_device(UCLASS_NORTHBRIDGE, &dev);
249 	uclass_first_device(UCLASS_PCH, &dev);
250 	uclass_first_device(UCLASS_LPC, &dev);
251 
252 	/* Set up pin control if available */
253 	ret = syscon_get_by_driver_data(X86_SYSCON_PINCONF, &dev);
254 	debug("%s, pinctrl=%p, ret=%d\n", __func__, dev, ret);
255 
256 	return 0;
257 }
258 
259 #ifndef CONFIG_EFI_STUB
reserve_arch(void)260 int reserve_arch(void)
261 {
262 #ifdef CONFIG_ENABLE_MRC_CACHE
263 	mrccache_reserve();
264 #endif
265 
266 #ifdef CONFIG_SEABIOS
267 	high_table_reserve();
268 #endif
269 
270 #ifdef CONFIG_HAVE_ACPI_RESUME
271 	acpi_s3_reserve();
272 
273 #ifdef CONFIG_HAVE_FSP
274 	/*
275 	 * Save stack address to CMOS so that at next S3 boot,
276 	 * we can use it as the stack address for fsp_contiue()
277 	 */
278 	fsp_save_s3_stack();
279 #endif /* CONFIG_HAVE_FSP */
280 #endif /* CONFIG_HAVE_ACPI_RESUME */
281 
282 	return 0;
283 }
284 #endif
285