mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 17:58:23 +00:00
5ed3e8659e
Add common clock, memory and low level code Signed-off-by: Dirk Behme <dirk.behme@googlemail.com>
72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
/*
|
|
* (C) Copyright 2008
|
|
* Texas Instruments, <www.ti.com>
|
|
*
|
|
* Richard Woodruff <r-woodruff2@ti.com>
|
|
* Syed Mohammed Khasim <khasim@ti.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/mem.h>
|
|
#include <asm/arch/clocks.h>
|
|
#include <asm/arch/sys_proto.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));
|
|
}
|
|
|
|
/*****************************************************************
|
|
* sr32 - clear & set a value in a bit range for a 32 bit address
|
|
*****************************************************************/
|
|
void sr32(void *addr, u32 start_bit, u32 num_bits, u32 value)
|
|
{
|
|
u32 tmp, msk = 0;
|
|
msk = 1 << num_bits;
|
|
--msk;
|
|
tmp = readl((u32)addr) & ~(msk << start_bit);
|
|
tmp |= value << start_bit;
|
|
writel(tmp, (u32)addr);
|
|
}
|
|
|
|
/*********************************************************************
|
|
* 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);
|
|
}
|