1 /* 2 * (C) Copyright 2012-2014 3 * Texas Instruments Incorporated, <www.ti.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <asm/io.h> 10 #include <div64.h> 11 #include <bootstage.h> 12 13 DECLARE_GLOBAL_DATA_PTR; 14 15 int timer_init(void) 16 { 17 gd->arch.tbl = 0; 18 gd->arch.tbu = 0; 19 20 gd->arch.timer_rate_hz = CONFIG_SYS_HZ_CLOCK; 21 return 0; 22 } 23 24 unsigned long long get_ticks(void) 25 { 26 ulong nowl, nowu; 27 28 asm volatile("mrrc p15, 0, %0, %1, c14" : "=r" (nowl), "=r" (nowu)); 29 30 gd->arch.tbl = nowl; 31 gd->arch.tbu = nowu; 32 33 return (((unsigned long long)gd->arch.tbu) << 32) | gd->arch.tbl; 34 } 35 36 37 ulong timer_get_boot_us(void) 38 { 39 return lldiv(get_ticks(), CONFIG_SYS_HZ_CLOCK / 1000000); 40 } 41 42 ulong get_tbclk(void) 43 { 44 return gd->arch.timer_rate_hz; 45 } 46