arch/arm/mach-mmp/common.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  linux/arch/arm/mach-mmp/common.c
   4  *
   5  *  Code common to PXA168 processor lines
   6  */
   7
   8 #include <linux/init.h>
   9 #include <linux/kernel.h>
  10 #include <linux/module.h>
  11
  12 #include <asm/page.h>
  13 #include <asm/mach/map.h>
  14 #include <asm/system_misc.h>
  15 #include "addr-map.h"
  16 #include <linux/soc/mmp/cputype.h>
  17
  18 #include "common.h"
  19
  20 #define MMP_CHIPID      CIU_REG(0x00)
  21
  22 unsigned int mmp_chip_id;
  23 EXPORT_SYMBOL(mmp_chip_id);
  24
  25 static struct map_desc standard_io_desc[] __initdata = {
  26         {
  27                 .pfn            = __phys_to_pfn(APB_PHYS_BASE),
  28                 .virtual        = (unsigned long)APB_VIRT_BASE,
  29                 .length         = APB_PHYS_SIZE,
  30                 .type           = MT_DEVICE,
  31         }, {
  32                 .pfn            = __phys_to_pfn(AXI_PHYS_BASE),
  33                 .virtual        = (unsigned long)AXI_VIRT_BASE,
  34                 .length         = AXI_PHYS_SIZE,
  35                 .type           = MT_DEVICE,
  36         },
  37 };
  38
  39 static struct map_desc mmp2_io_desc[] __initdata = {
  40         {
  41                 .pfn            = __phys_to_pfn(PGU_PHYS_BASE),
  42                 .virtual        = (unsigned long)PGU_VIRT_BASE,
  43                 .length         = PGU_PHYS_SIZE,
  44                 .type           = MT_DEVICE,
  45         },
  46 };
  47
  48 void __init mmp_map_io(void)
  49 {
  50         iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
  51
  52         /* this is early, initialize mmp_chip_id here */
  53         mmp_chip_id = __raw_readl(MMP_CHIPID);
  54 }
  55
  56 void __init mmp2_map_io(void)
  57 {
  58         mmp_map_io();
  59         iotable_init(mmp2_io_desc, ARRAY_SIZE(mmp2_io_desc));
  60 }
  61
  62 void mmp_restart(enum reboot_mode mode, const char *cmd)
  63 {
  64         soft_restart(0);
  65 }