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 */ 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 void board_quiesce_devices(void); 88 89 void quick_ram_check(void); 90 91 #define PCI_VGA_RAM_IMAGE_START 0xc0000 92 93 #endif /* _U_BOOT_I386_H_ */ 94