2018-05-06 21:58:06 +00:00
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// SPDX-License-Identifier: GPL-2.0+
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2008-12-14 08:47:14 +00:00
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/*
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* (C) Copyright 2008
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* Texas Instruments, <www.ti.com>
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*
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* Richard Woodruff <r-woodruff2@ti.com>
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* Syed Mohammed Khasim <khasim@ti.com>
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*/
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#include <common.h>
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#include <asm/io.h>
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/************************************************************
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* sdelay() - simple spin loop. Will be constant time as
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* its generally used in bypass conditions only. This
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* is necessary until timers are accessible.
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*
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* not inline to increase chances its in cache when called
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*************************************************************/
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void sdelay(unsigned long loops)
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{
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__asm__ volatile ("1:\n" "subs %0, %1, #1\n"
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"bne 1b":"=r" (loops):"0"(loops));
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}
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/*********************************************************************
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* wait_on_value() - common routine to allow waiting for changes in
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* volatile regs.
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*********************************************************************/
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u32 wait_on_value(u32 read_bit_mask, u32 match_value, void *read_addr,
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u32 bound)
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{
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u32 i = 0, val;
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do {
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++i;
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val = readl((u32)read_addr) & read_bit_mask;
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if (val == match_value)
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return 1;
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if (i == bound)
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return 0;
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} while (1);
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}
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