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

   1 /* arch/arm/mach-s3c2410/include/mach/uncompress.h
   2  *
   3  * Copyright (c) 2003-2007 Simtec Electronics
   4  *      http://armlinux.simtec.co.uk/
   5  *      Ben Dooks <ben@simtec.co.uk>
   6  *
   7  * S3C2410 - uncompress code
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12 */
  13
  14 #ifndef __ASM_ARCH_UNCOMPRESS_H
  15 #define __ASM_ARCH_UNCOMPRESS_H
  16
  17 #include <mach/regs-gpio.h>
  18 #include <mach/map.h>
  19
  20 /* working in physical space... */
  21 #undef S3C2410_GPIOREG
  22 #define S3C2410_GPIOREG(x) ((S3C24XX_PA_GPIO + (x)))
  23
  24 #include <plat/uncompress.h>
  25
  26 static inline int is_arm926(void)
  27 {
  28         unsigned int cpuid;
  29
  30         asm volatile ("mrc p15, 0, %0, c1, c0, 0" : "=r" (cpuid));
  31
  32         return ((cpuid & 0xff0) == 0x260);
  33 }
  34
  35 static void arch_detect_cpu(void)
  36 {
  37         unsigned int cpuid;
  38
  39         cpuid = *((volatile unsigned int *)S3C2410_GSTATUS1);
  40         cpuid &= S3C2410_GSTATUS1_IDMASK;
  41
  42         if (is_arm926() || cpuid == S3C2410_GSTATUS1_2440 ||
  43             cpuid == S3C2410_GSTATUS1_2442 ||
  44             cpuid == S3C2410_GSTATUS1_2416 ||
  45             cpuid == S3C2410_GSTATUS1_2450) {
  46                 fifo_mask = S3C2440_UFSTAT_TXMASK;
  47                 fifo_max = 63 << S3C2440_UFSTAT_TXSHIFT;
  48         } else {
  49                 fifo_mask = S3C2410_UFSTAT_TXMASK;
  50                 fifo_max = 15 << S3C2410_UFSTAT_TXSHIFT;
  51         }
  52 }
  53
  54 #endif /* __ASM_ARCH_UNCOMPRESS_H */