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
  27 static 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
  36 static 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 */