LXR linux/arch/arm/mach-s3c2410/include/mach/uncompress.h

   1
   2/* arch/arm/mach-s3c2410/include/mach/uncompress.h
   3 *
   4 * Copyright (c) 2003, 2007 Simtec Electronics
   5 *      http://armlinux.simtec.co.uk/
   6 *      Ben Dooks <ben@simtec.co.uk>
   7 *
   8 * S3C2410 - uncompress code
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License version 2 as
  12 * published by the Free Software Foundation.
  13*/
  14
  15#ifndef __ASM_ARCH_UNCOMPRESS_H
  16#define __ASM_ARCH_UNCOMPRESS_H
  17
  18#include <mach/regs-gpio.h>
  19#include <mach/map.h>
  20
  21/* working in physical space... */
  22#undef S3C2410_GPIOREG
  23#define S3C2410_GPIOREG(x) ((S3C24XX_PA_GPIO + (x)))
  24
  25#include <plat/uncompress.h>
  26
  27static inline int is_arm926(void)
  28{
  29        unsigned int cpuid;
  30
  31        asm volatile ("mrc p15, 0, %0, c1, c0, 0" : "=r" (cpuid));
  32
  33        return ((cpuid & 0xff0) == 0x260);
  34}
  35
  36static void arch_detect_cpu(void)
  37{
  38        unsigned int cpuid;
  39
  40        cpuid = *((volatile unsigned int *)S3C2410_GSTATUS1);
  41        cpuid &= S3C2410_GSTATUS1_IDMASK;
  42
  43        if (is_arm926() || cpuid == S3C2410_GSTATUS1_2440 ||
  44            cpuid == S3C2410_GSTATUS1_2442) {
  45                fifo_mask = S3C2440_UFSTAT_TXMASK;
  46                fifo_max = 63 << S3C2440_UFSTAT_TXSHIFT;
  47        } else {
  48                fifo_mask = S3C2410_UFSTAT_TXMASK;
  49                fifo_max = 15 << S3C2410_UFSTAT_TXSHIFT;
  50        }
  51}
  52
  53#endif /* __ASM_ARCH_UNCOMPRESS_H */
  54