arch/arm/mach-rmobile/memmap-gen3.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Renesas RCar Gen3 memory map tables
   4  *
   5  * Copyright (C) 2017 Marek Vasut <marek.vasut@gmail.com>
   6  */
   7
   8 #include <asm/armv8/mmu.h>
   9 #include <asm/global_data.h>
  10 #include <asm/u-boot.h>
  11 #include <cpu_func.h>
  12
  13 #define GEN3_NR_REGIONS 16
  14
  15 static struct mm_region gen3_mem_map[GEN3_NR_REGIONS] = {
  16         {
  17                 .virt = 0x0UL,
  18                 .phys = 0x0UL,
  19                 .size = 0x40000000UL,
  20                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
  21                          PTE_BLOCK_NON_SHARE |
  22                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
  23         }, {
  24                 .virt = 0x40000000UL,
  25                 .phys = 0x40000000UL,
  26                 .size = 0x03F00000UL,
  27                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
  28                          PTE_BLOCK_INNER_SHARE
  29         }, {
  30                 .virt = 0x47E00000UL,
  31                 .phys = 0x47E00000UL,
  32                 .size = 0x78200000UL,
  33                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
  34                          PTE_BLOCK_INNER_SHARE
  35         }, {
  36                 .virt = 0xc0000000UL,
  37                 .phys = 0xc0000000UL,
  38                 .size = 0x40000000UL,
  39                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
  40                          PTE_BLOCK_NON_SHARE |
  41                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
  42         }, {
  43                 .virt = 0x100000000UL,
  44                 .phys = 0x100000000UL,
  45                 .size = 0xf00000000UL,
  46                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
  47                          PTE_BLOCK_INNER_SHARE
  48         }, {
  49                 /* List terminator */
  50                 0,
  51         }
  52 };
  53
  54 struct mm_region *mem_map = gen3_mem_map;
  55
  56 DECLARE_GLOBAL_DATA_PTR;
  57
  58 void enable_caches(void)
  59 {
  60         u64 start, size;
  61         int bank, i = 0;
  62
  63         /* Create map for RPC access */
  64         gen3_mem_map[i].virt = 0x0ULL;
  65         gen3_mem_map[i].phys = 0x0ULL;
  66         gen3_mem_map[i].size = 0x40000000ULL;
  67         gen3_mem_map[i].attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
  68                                 PTE_BLOCK_NON_SHARE |
  69                                 PTE_BLOCK_PXN | PTE_BLOCK_UXN;
  70         i++;
  71
  72         /* Generate entires for DRAM in 32bit address space */
  73         for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
  74                 start = gd->bd->bi_dram[bank].start;
  75                 size = gd->bd->bi_dram[bank].size;
  76
  77                 /* Skip empty DRAM banks */
  78                 if (!size)
  79                         continue;
  80
  81                 /* Skip DRAM above 4 GiB */
  82                 if (start >> 32ULL)
  83                         continue;
  84
  85                 /* Mark memory reserved by ATF as cacheable too. */
  86                 if (start == 0x48000000) {
  87                         /* Unmark protection area (0x43F00000 to 0x47DFFFFF) */
  88                         gen3_mem_map[i].virt = 0x40000000ULL;
  89                         gen3_mem_map[i].phys = 0x40000000ULL;
  90                         gen3_mem_map[i].size = 0x03F00000ULL;
  91                         gen3_mem_map[i].attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
  92                                                 PTE_BLOCK_INNER_SHARE;
  93                         i++;
  94
  95                         start = 0x47E00000ULL;
  96                         size += 0x00200000ULL;
  97                 }
  98
  99                 gen3_mem_map[i].virt = start;
 100                 gen3_mem_map[i].phys = start;
 101                 gen3_mem_map[i].size = size;
 102                 gen3_mem_map[i].attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
 103                                         PTE_BLOCK_INNER_SHARE;
 104                 i++;
 105         }
 106
 107         /* Create map for register access */
 108         gen3_mem_map[i].virt = 0xc0000000ULL;
 109         gen3_mem_map[i].phys = 0xc0000000ULL;
 110         gen3_mem_map[i].size = 0x40000000ULL;
 111         gen3_mem_map[i].attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
 112                                 PTE_BLOCK_NON_SHARE |
 113                                 PTE_BLOCK_PXN | PTE_BLOCK_UXN;
 114         i++;
 115
 116         /* Generate entires for DRAM in 64bit address space */
 117         for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
 118                 start = gd->bd->bi_dram[bank].start;
 119                 size = gd->bd->bi_dram[bank].size;
 120
 121                 /* Skip empty DRAM banks */
 122                 if (!size)
 123                         continue;
 124
 125                 /* Skip DRAM below 4 GiB */
 126                 if (!(start >> 32ULL))
 127                         continue;
 128
 129                 gen3_mem_map[i].virt = start;
 130                 gen3_mem_map[i].phys = start;
 131                 gen3_mem_map[i].size = size;
 132                 gen3_mem_map[i].attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
 133                                         PTE_BLOCK_INNER_SHARE;
 134                 i++;
 135         }
 136
 137         /* Zero out the remaining regions. */
 138         for (; i < GEN3_NR_REGIONS; i++) {
 139                 gen3_mem_map[i].virt = 0;
 140                 gen3_mem_map[i].phys = 0;
 141                 gen3_mem_map[i].size = 0;
 142                 gen3_mem_map[i].attrs = 0;
 143         }
 144
 145         if (!icache_status())
 146                 icache_enable();
 147
 148         dcache_enable();
 149 }