mirror of
https://github.com/u-boot/u-boot.git
synced 2025-04-18 10:54:37 +00:00
03de305ec4
As part of bringing the master branch back in to next, we need to allow for all of these changes to exist here. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2008
|
|
* Texas Instruments, <www.ti.com>
|
|
*
|
|
* Richard Woodruff <r-woodruff2@ti.com>
|
|
* Syed Mohammed Khasim <khasim@ti.com>
|
|
*/
|
|
|
|
#include <asm/io.h>
|
|
|
|
/************************************************************
|
|
* sdelay() - simple spin loop. Will be constant time as
|
|
* its generally used in bypass conditions only. This
|
|
* is necessary until timers are accessible.
|
|
*
|
|
* not inline to increase chances its in cache when called
|
|
*************************************************************/
|
|
void sdelay(unsigned long loops)
|
|
{
|
|
__asm__ volatile ("1:\n" "subs %0, %1, #1\n"
|
|
"bne 1b":"=r" (loops):"0"(loops));
|
|
}
|
|
|
|
/*********************************************************************
|
|
* wait_on_value() - common routine to allow waiting for changes in
|
|
* volatile regs.
|
|
*********************************************************************/
|
|
u32 wait_on_value(u32 read_bit_mask, u32 match_value, void *read_addr,
|
|
u32 bound)
|
|
{
|
|
u32 i = 0, val;
|
|
do {
|
|
++i;
|
|
val = readl((u32)read_addr) & read_bit_mask;
|
|
if (val == match_value)
|
|
return 1;
|
|
if (i == bound)
|
|
return 0;
|
|
} while (1);
|
|
}
|