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