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