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 10struct global_data; 11 12extern char gdt_rom[]; 13 14/* cpu/.../cpu.c */ 15int arch_cpu_init(void); 16 17/** 18 * x86_cpu_init_f() - Set up basic features of the x86 CPU 19 * 20 * 0 on success, -ve on error 21 */ 22int x86_cpu_init_f(void); 23 24/** 25 * x86_cpu_reinit_f() - Set up the CPU a second time 26 * 27 * Once cpu_init_f() has been called (e.g. in SPL) we should not call it 28 * again (e.g. in U-Boot proper) since it sets up the state from scratch. 29 * Call this function in later phases of U-Boot instead. It reads the CPU 30 * identify so that CPU functions can be used correctly, but does not change 31 * anything. 32 * 33 * @return 0 (indicating success, to mimic cpu_init_f()) 34 */ 35int x86_cpu_reinit_f(void); 36 37/** 38 * x86_cpu_init_tpl() - Do the minimum possible CPU init 39 * 40 * This just sets up the CPU features and figured out the identity 41 * 42 * @return 0 (indicating success, to mimic cpu_init_f()) 43 */ 44int x86_cpu_init_tpl(void); 45 46/** 47 * cpu_reinit_fpu() - Reinit the FPU if something is wrong with it 48 * 49 * The FSP-M code can leave registers in use in the FPU. This functions reinits 50 * it so that the FPU can be used safely 51 */ 52void cpu_reinit_fpu(void); 53 54int cpu_init_f(void); 55void setup_gdt(struct global_data *id, u64 *gdt_addr); 56/* 57 * Setup FSP execution environment GDT to use the one we used in 58 * arch/x86/cpu/start16.S and reload the segment registers. 59 */ 60void setup_fsp_gdt(void); 61int init_cache(void); 62int cleanup_before_linux(void); 63 64/* cpu/.../timer.c */ 65void timer_isr(void *); 66typedef void (timer_fnc_t) (void); 67int register_timer_isr (timer_fnc_t *isr_func); 68unsigned long get_tbclk_mhz(void); 69void timer_set_base(uint64_t base); 70int i8254_init(void); 71 72/* cpu/.../interrupts.c */ 73int cpu_init_interrupts(void); 74 75int cleanup_before_linux(void); 76int x86_cleanup_before_linux(void); 77void x86_enable_caches(void); 78void x86_disable_caches(void); 79int x86_init_cache(void); 80ulong board_get_usable_ram_top(ulong total_size); 81int default_print_cpuinfo(void); 82 83/* Set up a UART which can be used with printch(), printhex8(), etc. */ 84int setup_internal_uart(int enable); 85 86void isa_unmap_rom(u32 addr); 87u32 isa_map_rom(u32 bus_addr, int size); 88 89/* arch/x86/lib/... */ 90int video_bios_init(void); 91 92/* arch/x86/lib/fsp1,2/... */ 93 94/** 95 * fsp_save_s3_stack() - save stack address to CMOS for next S3 boot 96 * 97 * At the end of pre-relocation phase, save the new stack address 98 * to CMOS and use it as the stack on next S3 boot for fsp_init() 99 * continuation function. 100 * 101 * @return: 0 if OK, -ve on error 102 */ 103int fsp_save_s3_stack(void); 104 105void board_init_f_r_trampoline(ulong) __attribute__ ((noreturn)); 106void board_init_f_r(void) __attribute__ ((noreturn)); 107 108int arch_misc_init(void); 109 110/* Read the time stamp counter */ 111static inline __attribute__((no_instrument_function)) uint64_t rdtsc(void) 112{ 113 uint32_t high, low; 114 __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high)); 115 return (((uint64_t)high) << 32) | low; 116} 117 118/* board/... */ 119void timer_set_tsc_base(uint64_t new_base); 120uint64_t timer_get_tsc(void); 121 122void quick_ram_check(void); 123 124#define PCI_VGA_RAM_IMAGE_START 0xc0000 125 126#endif /* _U_BOOT_I386_H_ */ 127