arch/arm/mach-bcm283x/init.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * (C) Copyright 2012 Stephen Warren
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  */
   8
   9 #include <common.h>
  10 #include <cpu_func.h>
  11 #include <dm/device.h>
  12 #include <fdt_support.h>
  13
  14 #ifdef CONFIG_ARM64
  15 #include <asm/armv8/mmu.h>
  16
  17 static struct mm_region bcm283x_mem_map[] = {
  18         {
  19                 .virt = 0x00000000UL,
  20                 .phys = 0x00000000UL,
  21                 .size = 0x3f000000UL,
  22                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
  23                          PTE_BLOCK_INNER_SHARE
  24         }, {
  25                 .virt = 0x3f000000UL,
  26                 .phys = 0x3f000000UL,
  27                 .size = 0x01000000UL,
  28                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
  29                          PTE_BLOCK_NON_SHARE |
  30                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
  31         }, {
  32                 /* List terminator */
  33                 0,
  34         }
  35 };
  36
  37 static struct mm_region bcm2711_mem_map[] = {
  38         {
  39                 .virt = 0x00000000UL,
  40                 .phys = 0x00000000UL,
  41                 .size = 0xfe000000UL,
  42                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
  43                          PTE_BLOCK_INNER_SHARE
  44         }, {
  45                 .virt = 0xfe000000UL,
  46                 .phys = 0xfe000000UL,
  47                 .size = 0x01800000UL,
  48                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
  49                          PTE_BLOCK_NON_SHARE |
  50                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
  51         }, {
  52                 /* List terminator */
  53                 0,
  54         }
  55 };
  56
  57 struct mm_region *mem_map = bcm283x_mem_map;
  58
  59 /*
  60  * I/O address space varies on different chip versions.
  61  * We set the base address by inspecting the DTB.
  62  */
  63 static const struct udevice_id board_ids[] = {
  64         { .compatible = "brcm,bcm2837", .data = (ulong)&bcm283x_mem_map},
  65         { .compatible = "brcm,bcm2838", .data = (ulong)&bcm2711_mem_map},
  66         { .compatible = "brcm,bcm2711", .data = (ulong)&bcm2711_mem_map},
  67         { },
  68 };
  69
  70 static void _rpi_update_mem_map(struct mm_region *pd)
  71 {
  72         int i;
  73
  74         for (i = 0; i < 2; i++) {
  75                 mem_map[i].virt = pd[i].virt;
  76                 mem_map[i].phys = pd[i].phys;
  77                 mem_map[i].size = pd[i].size;
  78                 mem_map[i].attrs = pd[i].attrs;
  79         }
  80 }
  81
  82 static void rpi_update_mem_map(void)
  83 {
  84         int ret;
  85         struct mm_region *mm;
  86         const struct udevice_id *of_match = board_ids;
  87
  88         while (of_match->compatible) {
  89                 ret = fdt_node_check_compatible(gd->fdt_blob, 0,
  90                                                 of_match->compatible);
  91                 if (!ret) {
  92                         mm = (struct mm_region *)of_match->data;
  93                         _rpi_update_mem_map(mm);
  94                         break;
  95                 }
  96
  97                 of_match++;
  98         }
  99 }
 100 #else
 101 static void rpi_update_mem_map(void) {}
 102 #endif
 103
 104 unsigned long rpi_bcm283x_base = 0x3f000000;
 105
 106 int arch_cpu_init(void)
 107 {
 108         icache_enable();
 109
 110         return 0;
 111 }
 112
 113 int mach_cpu_init(void)
 114 {
 115         int ret, soc_offset;
 116         u64 io_base, size;
 117
 118         rpi_update_mem_map();
 119
 120         /* Get IO base from device tree */
 121         soc_offset = fdt_path_offset(gd->fdt_blob, "/soc");
 122         if (soc_offset < 0)
 123                 return soc_offset;
 124
 125         ret = fdt_read_range((void *)gd->fdt_blob, soc_offset, 0, NULL,
 126                                 &io_base, &size);
 127         if (ret)
 128                 return ret;
 129
 130         rpi_bcm283x_base = io_base;
 131
 132         return 0;
 133 }
 134
 135 #ifdef CONFIG_ARMV7_LPAE
 136 void enable_caches(void)
 137 {
 138         dcache_enable();
 139 }
 140 #endif