1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * (C) Copyright 2008 4 * Texas Instruments, <www.ti.com> 5 * 6 * Richard Woodruff <r-woodruff2@ti.com> 7 * Syed Mohammed Khasim <khasim@ti.com> 8 */ 9 10#include <asm/io.h> 11 12/************************************************************ 13 * sdelay() - simple spin loop. Will be constant time as 14 * its generally used in bypass conditions only. This 15 * is necessary until timers are accessible. 16 * 17 * not inline to increase chances its in cache when called 18 *************************************************************/ 19void sdelay(unsigned long loops) 20{ 21 __asm__ volatile ("1:\n" "subs %0, %1, #1\n" 22 "bne 1b":"=r" (loops):"0"(loops)); 23} 24 25/********************************************************************* 26 * wait_on_value() - common routine to allow waiting for changes in 27 * volatile regs. 28 *********************************************************************/ 29u32 wait_on_value(u32 read_bit_mask, u32 match_value, void *read_addr, 30 u32 bound) 31{ 32 u32 i = 0, val; 33 do { 34 ++i; 35 val = readl((u32)read_addr) & read_bit_mask; 36 if (val == match_value) 37 return 1; 38 if (i == bound) 39 return 0; 40 } while (1); 41} 42