arch/arm/plat-mxc/cpu.c

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