Logo Search packages:      
Sourcecode: x-loader-omap4 version File versions  Download package

syslib.c

/*
 * (C) Copyright 2006
 * Texas Instruments, <www.ti.com>
 * Richard Woodruff <r-woodruff2@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/arch/cpu.h>
#include <asm/io.h>
#include <asm/arch/bits.h>
#include <asm/arch/mem.h>
#include <asm/arch/clocks.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/sys_info.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(u32 addr, u32 start_bit, u32 num_bits, u32 value)
{
      u32 tmp, msk = 0;
      msk = 1 << num_bits;
      --msk;
      tmp = __raw_readl(addr) & ~(msk << start_bit);
      tmp |=  value << start_bit;
      __raw_writel(tmp, 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, u32 read_addr, u32 bound)
{
      u32 i = 0, val;
      do {
            ++i;
            val = __raw_readl(read_addr) & read_bit_mask;
            if (val == match_value)
                  return (1);
            if (i == bound)
                  return (0);
      } while (1);
}


Generated by  Doxygen 1.6.0   Back to index