1/* 2 * (C) Copyright 2002 3 * Daniel Engström, Omicron Ceti AB, daniel@omicron.se. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8#ifndef _U_BOOT_I386_H_ 9#define _U_BOOT_I386_H_ 1 10 11struct global_data; 12 13extern char gdt_rom[]; 14 15/* cpu/.../cpu.c */ 16int arch_cpu_init(void); 17int x86_cpu_init_f(void); 18int cpu_init_f(void); 19void setup_gdt(struct global_data *id, u64 *gdt_addr); 20/* 21 * Setup FSP execution environment GDT to use the one we used in 22 * arch/x86/cpu/start16.S and reload the segment registers. 23 */ 24void setup_fsp_gdt(void); 25int init_cache(void); 26int cleanup_before_linux(void); 27 28/* cpu/.../timer.c */ 29void timer_isr(void *); 30typedef void (timer_fnc_t) (void); 31int register_timer_isr (timer_fnc_t *isr_func); 32unsigned long get_tbclk_mhz(void); 33void timer_set_base(uint64_t base); 34int i8254_init(void); 35 36/* cpu/.../interrupts.c */ 37int cpu_init_interrupts(void); 38 39int cleanup_before_linux(void); 40int x86_cleanup_before_linux(void); 41void x86_enable_caches(void); 42void x86_disable_caches(void); 43int x86_init_cache(void); 44void reset_cpu(ulong addr); 45ulong board_get_usable_ram_top(ulong total_size); 46int default_print_cpuinfo(void); 47 48/* Set up a UART which can be used with printch(), printhex8(), etc. */ 49int setup_internal_uart(int enable); 50 51void setup_pcat_compatibility(void); 52 53void isa_unmap_rom(u32 addr); 54u32 isa_map_rom(u32 bus_addr, int size); 55 56/* arch/x86/lib/... */ 57int video_bios_init(void); 58 59/* arch/x86/lib/fsp/... */ 60 61/** 62 * fsp_save_s3_stack() - save stack address to CMOS for next S3 boot 63 * 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. 67 * 68 * @return: 0 if OK, -ve on error 69 */ 70int fsp_save_s3_stack(void); 71 72void board_init_f_r_trampoline(ulong) __attribute__ ((noreturn)); 73void board_init_f_r(void) __attribute__ ((noreturn)); 74 75int arch_misc_init(void); 76 77/* Read the time stamp counter */ 78static inline __attribute__((no_instrument_function)) uint64_t rdtsc(void) 79{ 80 uint32_t high, low; 81 __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high)); 82 return (((uint64_t)high) << 32) | low; 83} 84 85/* board/... */ 86void timer_set_tsc_base(uint64_t new_base); 87uint64_t timer_get_tsc(void); 88void board_quiesce_devices(void); 89 90void quick_ram_check(void); 91 92#define PCI_VGA_RAM_IMAGE_START 0xc0000 93 94#endif /* _U_BOOT_I386_H_ */ 95