3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 DECLARE_GLOBAL_DATA_PTR;
28 static inline void mips_compare_set(u32 v){
29 asm volatile ("mtc0 %0, $11" : : "r" (v));
32 static inline void mips_count_set(u32 v){
33 asm volatile ("mtc0 %0, $9" : : "r" (v));
36 static inline u32 mips_count_get(void){
39 asm volatile ("mfc0 %0, $9" : "=r" (count) :);
44 * timer without interrupts
53 ulong get_timer(ulong base){
54 return(mips_count_get() - base);
57 void udelay(unsigned long usec){
59 ulong start = get_timer(0);
63 * We don't have filled the bd->bi_cfg_hz
64 * before relocation to RAM (bd is read only before that),
66 if((gd->flags & GD_FLG_RELOC) == 0){
67 tmo = usec * (CFG_HZ_FALLBACK / 1000000);
69 tmo = usec * (CFG_HZ / 1000000);
72 while ((ulong)((mips_count_get() - start)) < tmo)