arch/arm/mach-rmobile/cpu_info-rcar.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * arch/arm/cpu/armv7/rmobile/cpu_info-rcar.c
   4  *
   5  * Copyright (C) 2013,2014 Renesas Electronics Corporation
   6  */
   7 #include <common.h>
   8 #include <asm/io.h>
   9
  10 #define PRR_MASK                0x7fff
  11 #define R8A7796_REV_1_0         0x5200
  12 #define R8A7796_REV_1_1         0x5210
  13
  14 static u32 rmobile_get_prr(void)
  15 {
  16 #ifdef CONFIG_RCAR_GEN3
  17         return readl(0xFFF00044);
  18 #else
  19         return readl(0xFF000044);
  20 #endif
  21 }
  22
  23 u32 rmobile_get_cpu_type(void)
  24 {
  25         return (rmobile_get_prr() & 0x00007F00) >> 8;
  26 }
  27
  28 u32 rmobile_get_cpu_rev_integer(void)
  29 {
  30         const u32 prr = rmobile_get_prr();
  31
  32         if ((prr & PRR_MASK) == R8A7796_REV_1_1)
  33                 return 1;
  34         else
  35                 return ((prr & 0x000000F0) >> 4) + 1;
  36 }
  37
  38 u32 rmobile_get_cpu_rev_fraction(void)
  39 {
  40         const u32 prr = rmobile_get_prr();
  41
  42         if ((prr & PRR_MASK) == R8A7796_REV_1_1)
  43                 return 1;
  44         else
  45                 return prr & 0x0000000F;
  46 }