2 * (C) Copyright 2008-2011
9 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
13 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
16 * Part of this file is adapted from coreboot
17 * src/arch/x86/lib/cpu.c
19 * SPDX-License-Identifier: GPL-2.0+
28 #include <asm/control_regs.h>
29 #include <asm/coreboot_tables.h>
31 #include <asm/lapic.h>
32 #include <asm/microcode.h>
34 #include <asm/mrccache.h>
38 #include <asm/processor.h>
39 #include <asm/processor-flags.h>
40 #include <asm/interrupt.h>
41 #include <asm/tables.h>
42 #include <linux/compiler.h>
44 DECLARE_GLOBAL_DATA_PTR;
46 static const char *const x86_vendor_name[] = {
47 [X86_VENDOR_INTEL] = "Intel",
48 [X86_VENDOR_CYRIX] = "Cyrix",
49 [X86_VENDOR_AMD] = "AMD",
50 [X86_VENDOR_UMC] = "UMC",
51 [X86_VENDOR_NEXGEN] = "NexGen",
52 [X86_VENDOR_CENTAUR] = "Centaur",
53 [X86_VENDOR_RISE] = "Rise",
54 [X86_VENDOR_TRANSMETA] = "Transmeta",
55 [X86_VENDOR_NSC] = "NSC",
56 [X86_VENDOR_SIS] = "SiS",
59 int __weak x86_cleanup_before_linux(void)
61 #ifdef CONFIG_BOOTSTAGE_STASH
62 bootstage_stash((void *)CONFIG_BOOTSTAGE_STASH_ADDR,
63 CONFIG_BOOTSTAGE_STASH_SIZE);
69 int x86_init_cache(void)
75 int init_cache(void) __attribute__((weak, alias("x86_init_cache")));
77 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
79 printf("resetting ...\n");
90 void flush_cache(unsigned long dummy1, unsigned long dummy2)
95 __weak void reset_cpu(ulong addr)
97 /* Do a hard reset through the chipset's reset control register */
98 outb(SYS_RST | RST_CPU, IO_PORT_RESET);
103 void x86_full_reset(void)
105 outb(FULL_RST | SYS_RST | RST_CPU, IO_PORT_RESET);
108 /* Define these functions to allow ehch-hcd to function */
109 void flush_dcache_range(unsigned long start, unsigned long stop)
113 void invalidate_dcache_range(unsigned long start, unsigned long stop)
117 void dcache_enable(void)
122 void dcache_disable(void)
127 void icache_enable(void)
131 void icache_disable(void)
135 int icache_status(void)
140 const char *cpu_vendor_name(int vendor)
143 name = "<invalid cpu vendor>";
144 if ((vendor < (ARRAY_SIZE(x86_vendor_name))) &&
145 (x86_vendor_name[vendor] != 0))
146 name = x86_vendor_name[vendor];
151 char *cpu_get_name(char *name)
153 unsigned int *name_as_ints = (unsigned int *)name;
154 struct cpuid_result regs;
158 /* This bit adds up to 48 bytes */
159 for (i = 0; i < 3; i++) {
160 regs = cpuid(0x80000002 + i);
161 name_as_ints[i * 4 + 0] = regs.eax;
162 name_as_ints[i * 4 + 1] = regs.ebx;
163 name_as_ints[i * 4 + 2] = regs.ecx;
164 name_as_ints[i * 4 + 3] = regs.edx;
166 name[CPU_MAX_NAME_LEN - 1] = '\0';
168 /* Skip leading spaces. */
176 int default_print_cpuinfo(void)
178 printf("CPU: %s, vendor %s, device %xh\n",
179 cpu_has_64bit() ? "x86_64" : "x86",
180 cpu_vendor_name(gd->arch.x86_vendor), gd->arch.x86_device);
185 void show_boot_progress(int val)
187 outb(val, POST_PORT);
190 #ifndef CONFIG_SYS_COREBOOT
192 * Implement a weak default function for boards that optionally
193 * need to clean up the system before jumping to the kernel.
195 __weak void board_final_cleanup(void)
199 int last_stage_init(void)
203 board_final_cleanup();
209 static int x86_init_cpus(void)
212 debug("Init additional CPUs\n");
218 * This causes the cpu-x86 driver to be probed.
219 * We don't check return value here as we want to allow boards
220 * which have not been converted to use cpu uclass driver to boot.
222 uclass_first_device(UCLASS_CPU, &dev);
236 ret = x86_init_cpus();
241 * Set up the northbridge, PCH and LPC if available. Note that these
242 * may have had some limited pre-relocation init if they were probed
243 * before relocation, but this is post relocation.
245 uclass_first_device(UCLASS_NORTHBRIDGE, &dev);
246 uclass_first_device(UCLASS_PCH, &dev);
247 uclass_first_device(UCLASS_LPC, &dev);
249 /* Set up pin control if available */
250 ret = syscon_get_by_driver_data(X86_SYSCON_PINCONF, &dev);
251 debug("%s, pinctrl=%p, ret=%d\n", __func__, dev, ret);
256 #ifndef CONFIG_EFI_STUB
257 int reserve_arch(void)
259 #ifdef CONFIG_ENABLE_MRC_CACHE
263 #ifdef CONFIG_SEABIOS
264 high_table_reserve();