arch/arm/mach-imx/cpu.c

   1
   2 #include <linux/module.h>
   3 #include <linux/io.h>
   4
   5 #include "hardware.h"
   6
   7 unsigned int __mxc_cpu_type;
   8 EXPORT_SYMBOL(__mxc_cpu_type);
   9
  10 void mxc_set_cpu_type(unsigned int type)
  11 {
  12         __mxc_cpu_type = type;
  13 }
  14
  15 void imx_print_silicon_rev(const char *cpu, int srev)
  16 {
  17         if (srev == IMX_CHIP_REVISION_UNKNOWN)
  18                 pr_info("CPU identified as %s, unknown revision\n", cpu);
  19         else
  20                 pr_info("CPU identified as %s, silicon rev %d.%d\n",
  21                                 cpu, (srev >> 4) & 0xf, srev & 0xf);
  22 }
  23
  24 void __init imx_set_aips(void __iomem *base)
  25 {
  26         unsigned int reg;
  27 /*
  28  * Set all MPROTx to be non-bufferable, trusted for R/W,
  29  * not forced to user-mode.
  30  */
  31         __raw_writel(0x77777777, base + 0x0);
  32         __raw_writel(0x77777777, base + 0x4);
  33
  34 /*
  35  * Set all OPACRx to be non-bufferable, to not require
  36  * supervisor privilege level for access, allow for
  37  * write access and untrusted master access.
  38  */
  39         __raw_writel(0x0, base + 0x40);
  40         __raw_writel(0x0, base + 0x44);
  41         __raw_writel(0x0, base + 0x48);
  42         __raw_writel(0x0, base + 0x4C);
  43         reg = __raw_readl(base + 0x50) & 0x00FFFFFF;
  44         __raw_writel(reg, base + 0x50);
  45 }