1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3 * (C) Copyright 2002
4 * Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
5 */
6
7 #ifndef _U_BOOT_I386_H_
8 #define _U_BOOT_I386_H_ 1
9
10 struct global_data;
11
12 extern char gdt_rom[];
13
14 /* cpu/.../cpu.c */
15 int arch_cpu_init(void);
16 int x86_cpu_init_f(void);
17 int cpu_init_f(void);
18 void setup_gdt(struct global_data *id, u64 *gdt_addr);
19 /*
20 * Setup FSP execution environment GDT to use the one we used in
21 * arch/x86/cpu/start16.S and reload the segment registers.
22 */
23 void setup_fsp_gdt(void);
24 int init_cache(void);
25 int cleanup_before_linux(void);
26
27 /* cpu/.../timer.c */
28 void timer_isr(void *);
29 typedef void (timer_fnc_t) (void);
30 int register_timer_isr (timer_fnc_t *isr_func);
31 unsigned long get_tbclk_mhz(void);
32 void timer_set_base(uint64_t base);
33 int i8254_init(void);
34
35 /* cpu/.../interrupts.c */
36 int cpu_init_interrupts(void);
37
38 int cleanup_before_linux(void);
39 int x86_cleanup_before_linux(void);
40 void x86_enable_caches(void);
41 void x86_disable_caches(void);
42 int x86_init_cache(void);
43 void reset_cpu(ulong addr);
44 ulong board_get_usable_ram_top(ulong total_size);
45 int default_print_cpuinfo(void);
46
47 /* Set up a UART which can be used with printch(), printhex8(), etc. */
48 int setup_internal_uart(int enable);
49
50 void setup_pcat_compatibility(void);
51
52 void isa_unmap_rom(u32 addr);
53 u32 isa_map_rom(u32 bus_addr, int size);
54
55 /* arch/x86/lib/... */
56 int video_bios_init(void);
57
58 /* arch/x86/lib/fsp/... */
59
60 /**
61 * fsp_save_s3_stack() - save stack address to CMOS for next S3 boot
62 *
63 * At the end of pre-relocation phase, save the new stack address
64 * to CMOS and use it as the stack on next S3 boot for fsp_init()
65 * continuation function.
66 *
67 * @return: 0 if OK, -ve on error
68 */
69 int fsp_save_s3_stack(void);
70
71 void board_init_f_r_trampoline(ulong) __attribute__ ((noreturn));
72 void board_init_f_r(void) __attribute__ ((noreturn));
73
74 int arch_misc_init(void);
75
76 /* Read the time stamp counter */
rdtsc(void)77 static inline __attribute__((no_instrument_function)) uint64_t rdtsc(void)
78 {
79 uint32_t high, low;
80 __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high));
81 return (((uint64_t)high) << 32) | low;
82 }
83
84 /* board/... */
85 void timer_set_tsc_base(uint64_t new_base);
86 uint64_t timer_get_tsc(void);
87
88 void quick_ram_check(void);
89
90 #define PCI_VGA_RAM_IMAGE_START 0xc0000
91
92 #endif /* _U_BOOT_I386_H_ */
93