mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-05 18:56:15 +09:00
e761ecdbb8
This timer runs at a rate that can be calculated, well over 100MHz. It is ideal for accurate timing and does not need interrupt servicing. Tidy up some old broken and unneeded implementations at the same time. To provide a consistent view of boot time, we use the same time base as coreboot. Use the base timestamp supplied by coreboot as U-Boot's base time. Signed-off-by: Simon Glass <sjg@chromium.org>base Signed-off-by: Simon Glass <sjg@chromium.org>
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/*
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* (C) Copyright 2002
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* Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _U_BOOT_I386_H_
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#define _U_BOOT_I386_H_ 1
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/* cpu/.../cpu.c */
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int x86_cpu_init_r(void);
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int cpu_init_r(void);
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int x86_cpu_init_f(void);
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int cpu_init_f(void);
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void init_gd(gd_t *id, u64 *gdt_addr);
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void setup_gdt(gd_t *id, u64 *gdt_addr);
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int init_cache(void);
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int cleanup_before_linux(void);
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void panic_puts(const char *str);
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/* cpu/.../timer.c */
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void timer_isr(void *);
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typedef void (timer_fnc_t) (void);
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int register_timer_isr (timer_fnc_t *isr_func);
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unsigned long get_tbclk_mhz(void);
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void timer_set_base(uint64_t base);
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/* Architecture specific - can be in arch/x86/cpu/, arch/x86/lib/, or $(BOARD)/ */
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int dram_init_f(void);
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/* cpu/.../interrupts.c */
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int cpu_init_interrupts(void);
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/* board/.../... */
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int dram_init(void);
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void setup_pcat_compatibility(void);
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void isa_unmap_rom(u32 addr);
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u32 isa_map_rom(u32 bus_addr, int size);
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/* arch/x86/lib/... */
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int video_bios_init(void);
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void board_init_f_r_trampoline(ulong) __attribute__ ((noreturn));
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void board_init_f_r(void) __attribute__ ((noreturn));
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/* Read the time stamp counter */
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static inline uint64_t rdtsc(void)
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{
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uint32_t high, low;
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__asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high));
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return (((uint64_t)high) << 32) | low;
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}
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/* board/... */
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void timer_set_tsc_base(uint64_t new_base);
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uint64_t timer_get_tsc(void);
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#endif /* _U_BOOT_I386_H_ */
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