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 extern char gdt_rom[]; 12 13 /* cpu/.../cpu.c */ 14 int arch_cpu_init(void); 15 int x86_cpu_init_f(void); 16 int cpu_init_f(void); 17 void setup_gdt(gd_t *id, u64 *gdt_addr); 18 /* 19 * Setup FSP execution environment GDT to use the one we used in 20 * arch/x86/cpu/start16.S and reload the segment registers. 21 */ 22 void setup_fsp_gdt(void); 23 int init_cache(void); 24 int cleanup_before_linux(void); 25 26 /* cpu/.../timer.c */ 27 void timer_isr(void *); 28 typedef void (timer_fnc_t) (void); 29 int register_timer_isr (timer_fnc_t *isr_func); 30 unsigned long get_tbclk_mhz(void); 31 void timer_set_base(uint64_t base); 32 int i8254_init(void); 33 34 /* cpu/.../interrupts.c */ 35 int cpu_init_interrupts(void); 36 37 int cleanup_before_linux(void); 38 int x86_cleanup_before_linux(void); 39 void x86_enable_caches(void); 40 void x86_disable_caches(void); 41 int x86_init_cache(void); 42 void reset_cpu(ulong addr); 43 ulong board_get_usable_ram_top(ulong total_size); 44 int default_print_cpuinfo(void); 45 46 /* Set up a UART which can be used with printch(), printhex8(), etc. */ 47 int setup_internal_uart(int enable); 48 49 void setup_pcat_compatibility(void); 50 51 void isa_unmap_rom(u32 addr); 52 u32 isa_map_rom(u32 bus_addr, int size); 53 54 /* arch/x86/lib/... */ 55 int video_bios_init(void); 56 57 void board_init_f_r_trampoline(ulong) __attribute__ ((noreturn)); 58 void board_init_f_r(void) __attribute__ ((noreturn)); 59 60 int arch_misc_init(void); 61 62 /* Read the time stamp counter */ 63 static inline __attribute__((no_instrument_function)) uint64_t rdtsc(void) 64 { 65 uint32_t high, low; 66 __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high)); 67 return (((uint64_t)high) << 32) | low; 68 } 69 70 /* board/... */ 71 void timer_set_tsc_base(uint64_t new_base); 72 uint64_t timer_get_tsc(void); 73 void board_quiesce_devices(void); 74 75 void quick_ram_check(void); 76 77 #define PCI_VGA_RAM_IMAGE_START 0xc0000 78 79 #endif /* _U_BOOT_I386_H_ */ 80