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 11 struct global_data; 12 13 extern char gdt_rom[]; 14 15 /* cpu/.../cpu.c */ 16 int arch_cpu_init(void); 17 int x86_cpu_init_f(void); 18 int cpu_init_f(void); 19 void 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 */ 24 void setup_fsp_gdt(void); 25 int init_cache(void); 26 int cleanup_before_linux(void); 27 28 /* cpu/.../timer.c */ 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); 34 int i8254_init(void); 35 36 /* cpu/.../interrupts.c */ 37 int cpu_init_interrupts(void); 38 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); 47 48 /* Set up a UART which can be used with printch(), printhex8(), etc. */ 49 int setup_internal_uart(int enable); 50 51 void setup_pcat_compatibility(void); 52 53 void isa_unmap_rom(u32 addr); 54 u32 isa_map_rom(u32 bus_addr, int size); 55 56 /* arch/x86/lib/... */ 57 int 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 */ 70 int fsp_save_s3_stack(void); 71 72 void board_init_f_r_trampoline(ulong) __attribute__ ((noreturn)); 73 void board_init_f_r(void) __attribute__ ((noreturn)); 74 75 int arch_misc_init(void); 76 77 /* Read the time stamp counter */ 78 static 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/... */ 86 void timer_set_tsc_base(uint64_t new_base); 87 uint64_t timer_get_tsc(void); 88 void board_quiesce_devices(void); 89 90 void quick_ram_check(void); 91 92 #define PCI_VGA_RAM_IMAGE_START 0xc0000 93 94 #endif /* _U_BOOT_I386_H_ */ 95