arch/arm/mach-imx/cpu.c

   1
   2 #include <linux/module.h>
   3 #include <linux/io.h>
   4
   5 #include "hardware.h"
   6 #include "common.h"
   7
   8 unsigned int __mxc_cpu_type;
   9 EXPORT_SYMBOL(__mxc_cpu_type);
  10
  11 void mxc_set_cpu_type(unsigned int type)
  12 {
  13         __mxc_cpu_type = type;
  14 }
  15
  16 void imx_print_silicon_rev(const char *cpu, int srev)
  17 {
  18         if (srev == IMX_CHIP_REVISION_UNKNOWN)
  19                 pr_info("CPU identified as %s, unknown revision\n", cpu);
  20         else
  21                 pr_info("CPU identified as %s, silicon rev %d.%d\n",
  22                                 cpu, (srev >> 4) & 0xf, srev & 0xf);
  23 }
  24
  25 void __init imx_set_aips(void __iomem *base)
  26 {
  27         unsigned int reg;
  28 /*
  29  * Set all MPROTx to be non-bufferable, trusted for R/W,
  30  * not forced to user-mode.
  31  */
  32         __raw_writel(0x77777777, base + 0x0);
  33         __raw_writel(0x77777777, base + 0x4);
  34
  35 /*
  36  * Set all OPACRx to be non-bufferable, to not require
  37  * supervisor privilege level for access, allow for
  38  * write access and untrusted master access.
  39  */
  40         __raw_writel(0x0, base + 0x40);
  41         __raw_writel(0x0, base + 0x44);
  42         __raw_writel(0x0, base + 0x48);
  43         __raw_writel(0x0, base + 0x4C);
  44         reg = __raw_readl(base + 0x50) & 0x00FFFFFF;
  45         __raw_writel(reg, base + 0x50);
  46 }