1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2002 4 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 5 * Marius Groeger <mgroeger@sysgo.de> 6 * 7 * (C) Copyright 2002 8 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 9 * Alex Zuepke <azu@sysgo.de> 10 */ 11 12 #include <common.h> 13 #include <SA-1100.h> 14 15 ulong get_timer (ulong base) 16 { 17 return get_timer_masked (); 18 } 19 20 void __udelay (unsigned long usec) 21 { 22 udelay_masked (usec); 23 } 24 25 ulong get_timer_masked (void) 26 { 27 return OSCR; 28 } 29 30 void udelay_masked (unsigned long usec) 31 { 32 ulong tmo; 33 ulong endtime; 34 signed long diff; 35 36 if (usec >= 1000) { 37 tmo = usec / 1000; 38 tmo *= CONFIG_SYS_HZ; 39 tmo /= 1000; 40 } else { 41 tmo = usec * CONFIG_SYS_HZ; 42 tmo /= (1000*1000); 43 } 44 45 endtime = get_timer_masked () + tmo; 46 47 do { 48 ulong now = get_timer_masked (); 49 diff = endtime - now; 50 } while (diff >= 0); 51 } 52 53 /* 54 * This function is derived from PowerPC code (read timebase as long long). 55 * On ARM it just returns the timer value. 56 */ 57 unsigned long long get_ticks(void) 58 { 59 return get_timer(0); 60 } 61 62 /* 63 * This function is derived from PowerPC code (timebase clock frequency). 64 * On ARM it returns the number of timer ticks per second. 65 */ 66 ulong get_tbclk (void) 67 { 68 return CONFIG_SYS_HZ; 69 } 70