u-boot/arch/arm/cpu/armv7/syslib.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

42 lines
1.2 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 <common.h>
#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);
}