arch/arm/cpu/armv8/zynqmp/cpu.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2014 - 2015 Xilinx, Inc.
   4  * Michal Simek <michal.simek@xilinx.com>
   5  */
   6
   7 #include <common.h>
   8 #include <asm/arch/hardware.h>
   9 #include <asm/arch/sys_proto.h>
  10 #include <asm/armv8/mmu.h>
  11 #include <asm/io.h>
  12
  13 #define ZYNQ_SILICON_VER_MASK   0xF000
  14 #define ZYNQ_SILICON_VER_SHIFT  12
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 /*
  19  * Number of filled static entries and also the first empty
  20  * slot in zynqmp_mem_map.
  21  */
  22 #define ZYNQMP_MEM_MAP_USED     4
  23
  24 #if !defined(CONFIG_ZYNQMP_NO_DDR)
  25 #define DRAM_BANKS CONFIG_NR_DRAM_BANKS
  26 #else
  27 #define DRAM_BANKS 0
  28 #endif
  29
  30 #if defined(CONFIG_DEFINE_TCM_OCM_MMAP)
  31 #define TCM_MAP 1
  32 #else
  33 #define TCM_MAP 0
  34 #endif
  35
  36 /* +1 is end of list which needs to be empty */
  37 #define ZYNQMP_MEM_MAP_MAX (ZYNQMP_MEM_MAP_USED + DRAM_BANKS + TCM_MAP + 1)
  38
  39 static struct mm_region zynqmp_mem_map[ZYNQMP_MEM_MAP_MAX] = {
  40         {
  41                 .virt = 0x80000000UL,
  42                 .phys = 0x80000000UL,
  43                 .size = 0x70000000UL,
  44                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
  45                          PTE_BLOCK_NON_SHARE |
  46                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
  47         }, {
  48                 .virt = 0xf8000000UL,
  49                 .phys = 0xf8000000UL,
  50                 .size = 0x07e00000UL,
  51                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
  52                          PTE_BLOCK_NON_SHARE |
  53                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
  54         }, {
  55                 .virt = 0x400000000UL,
  56                 .phys = 0x400000000UL,
  57                 .size = 0x400000000UL,
  58                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
  59                          PTE_BLOCK_NON_SHARE |
  60                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
  61         }, {
  62                 .virt = 0x1000000000UL,
  63                 .phys = 0x1000000000UL,
  64                 .size = 0xf000000000UL,
  65                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
  66                          PTE_BLOCK_NON_SHARE |
  67                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
  68         }
  69 };
  70
  71 void mem_map_fill(void)
  72 {
  73         int banks = ZYNQMP_MEM_MAP_USED;
  74
  75 #if defined(CONFIG_DEFINE_TCM_OCM_MMAP)
  76         zynqmp_mem_map[banks].virt = 0xffe00000UL;
  77         zynqmp_mem_map[banks].phys = 0xffe00000UL;
  78         zynqmp_mem_map[banks].size = 0x00200000UL;
  79         zynqmp_mem_map[banks].attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
  80                                       PTE_BLOCK_INNER_SHARE;
  81         banks = banks + 1;
  82 #endif
  83
  84 #if !defined(CONFIG_ZYNQMP_NO_DDR)
  85         for (int i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
  86                 /* Zero size means no more DDR that's this is end */
  87                 if (!gd->bd->bi_dram[i].size)
  88                         break;
  89
  90                 zynqmp_mem_map[banks].virt = gd->bd->bi_dram[i].start;
  91                 zynqmp_mem_map[banks].phys = gd->bd->bi_dram[i].start;
  92                 zynqmp_mem_map[banks].size = gd->bd->bi_dram[i].size;
  93                 zynqmp_mem_map[banks].attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
  94                                               PTE_BLOCK_INNER_SHARE;
  95                 banks = banks + 1;
  96         }
  97 #endif
  98 }
  99
 100 struct mm_region *mem_map = zynqmp_mem_map;
 101
 102 u64 get_page_table_size(void)
 103 {
 104         return 0x14000;
 105 }
 106
 107 #ifdef CONFIG_SYS_MEM_RSVD_FOR_MMU
 108 int reserve_mmu(void)
 109 {
 110         initialize_tcm(TCM_LOCK);
 111         memset((void *)ZYNQMP_TCM_BASE_ADDR, 0, ZYNQMP_TCM_SIZE);
 112         gd->arch.tlb_size = PGTABLE_SIZE;
 113         gd->arch.tlb_addr = ZYNQMP_TCM_BASE_ADDR;
 114
 115         return 0;
 116 }
 117 #endif
 118
 119 static unsigned int zynqmp_get_silicon_version_secure(void)
 120 {
 121         u32 ver;
 122
 123         ver = readl(&csu_base->version);
 124         ver &= ZYNQMP_SILICON_VER_MASK;
 125         ver >>= ZYNQMP_SILICON_VER_SHIFT;
 126
 127         return ver;
 128 }
 129
 130 unsigned int zynqmp_get_silicon_version(void)
 131 {
 132         if (current_el() == 3)
 133                 return zynqmp_get_silicon_version_secure();
 134
 135         gd->cpu_clk = get_tbclk();
 136
 137         switch (gd->cpu_clk) {
 138         case 50000000:
 139                 return ZYNQMP_CSU_VERSION_QEMU;
 140         }
 141
 142         return ZYNQMP_CSU_VERSION_SILICON;
 143 }
 144
 145 #define ZYNQMP_MMIO_READ        0xC2000014
 146 #define ZYNQMP_MMIO_WRITE       0xC2000013
 147
 148 int __maybe_unused invoke_smc(u32 pm_api_id, u32 arg0, u32 arg1, u32 arg2,
 149                               u32 arg3, u32 *ret_payload)
 150 {
 151         /*
 152          * Added SIP service call Function Identifier
 153          * Make sure to stay in x0 register
 154          */
 155         struct pt_regs regs;
 156
 157         regs.regs[0] = pm_api_id;
 158         regs.regs[1] = ((u64)arg1 << 32) | arg0;
 159         regs.regs[2] = ((u64)arg3 << 32) | arg2;
 160
 161         smc_call(&regs);
 162
 163         if (ret_payload != NULL) {
 164                 ret_payload[0] = (u32)regs.regs[0];
 165                 ret_payload[1] = upper_32_bits(regs.regs[0]);
 166                 ret_payload[2] = (u32)regs.regs[1];
 167                 ret_payload[3] = upper_32_bits(regs.regs[1]);
 168                 ret_payload[4] = (u32)regs.regs[2];
 169         }
 170
 171         return regs.regs[0];
 172 }
 173
 174 #if defined(CONFIG_CLK_ZYNQMP)
 175 void zynqmp_pmufw_version(void)
 176 {
 177         int ret;
 178         u32 ret_payload[PAYLOAD_ARG_CNT];
 179         u32 pm_api_version;
 180
 181         ret = invoke_smc(ZYNQMP_SIP_SVC_GET_API_VERSION, 0, 0, 0, 0,
 182                          ret_payload);
 183         pm_api_version = ret_payload[1];
 184
 185         if (ret)
 186                 panic("PMUFW is not found - Please load it!\n");
 187
 188         printf("PMUFW:\tv%d.%d\n",
 189                pm_api_version >> ZYNQMP_PM_VERSION_MAJOR_SHIFT,
 190                pm_api_version & ZYNQMP_PM_VERSION_MINOR_MASK);
 191
 192         if (pm_api_version < ZYNQMP_PM_VERSION)
 193                 panic("PMUFW version error. Expected: v%d.%d\n",
 194                       ZYNQMP_PM_VERSION_MAJOR, ZYNQMP_PM_VERSION_MINOR);
 195 }
 196 #endif
 197
 198 static int zynqmp_mmio_rawwrite(const u32 address,
 199                       const u32 mask,
 200                       const u32 value)
 201 {
 202         u32 data;
 203         u32 value_local = value;
 204         int ret;
 205
 206         ret = zynqmp_mmio_read(address, &data);
 207         if (ret)
 208                 return ret;
 209
 210         data &= ~mask;
 211         value_local &= mask;
 212         value_local |= data;
 213         writel(value_local, (ulong)address);
 214         return 0;
 215 }
 216
 217 static int zynqmp_mmio_rawread(const u32 address, u32 *value)
 218 {
 219         *value = readl((ulong)address);
 220         return 0;
 221 }
 222
 223 int zynqmp_mmio_write(const u32 address,
 224                       const u32 mask,
 225                       const u32 value)
 226 {
 227         if (IS_ENABLED(CONFIG_SPL_BUILD) || current_el() == 3)
 228                 return zynqmp_mmio_rawwrite(address, mask, value);
 229         else
 230                 return invoke_smc(ZYNQMP_MMIO_WRITE, address, mask,
 231                                   value, 0, NULL);
 232
 233         return -EINVAL;
 234 }
 235
 236 int zynqmp_mmio_read(const u32 address, u32 *value)
 237 {
 238         u32 ret_payload[PAYLOAD_ARG_CNT];
 239         u32 ret;
 240
 241         if (!value)
 242                 return -EINVAL;
 243
 244         if (IS_ENABLED(CONFIG_SPL_BUILD) || current_el() == 3) {
 245                 ret = zynqmp_mmio_rawread(address, value);
 246         } else {
 247                 ret = invoke_smc(ZYNQMP_MMIO_READ, address, 0, 0,
 248                                  0, ret_payload);
 249                 *value = ret_payload[1];
 250         }
 251
 252         return ret;
 253 }