arch/arm/mach-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 #if defined(CONFIG_SYS_MEM_RSVD_FOR_MMU) || defined(CONFIG_DEFINE_TCM_OCM_MMAP)
 108 void tcm_init(u8 mode)
 109 {
 110         puts("WARNING: Initializing TCM overwrites TCM content\n");
 111         initialize_tcm(mode);
 112         memset((void *)ZYNQMP_TCM_BASE_ADDR, 0, ZYNQMP_TCM_SIZE);
 113 }
 114 #endif
 115
 116 #ifdef CONFIG_SYS_MEM_RSVD_FOR_MMU
 117 int reserve_mmu(void)
 118 {
 119         tcm_init(TCM_LOCK);
 120         gd->arch.tlb_size = PGTABLE_SIZE;
 121         gd->arch.tlb_addr = ZYNQMP_TCM_BASE_ADDR;
 122
 123         return 0;
 124 }
 125 #endif
 126
 127 static unsigned int zynqmp_get_silicon_version_secure(void)
 128 {
 129         u32 ver;
 130
 131         ver = readl(&csu_base->version);
 132         ver &= ZYNQMP_SILICON_VER_MASK;
 133         ver >>= ZYNQMP_SILICON_VER_SHIFT;
 134
 135         return ver;
 136 }
 137
 138 unsigned int zynqmp_get_silicon_version(void)
 139 {
 140         if (current_el() == 3)
 141                 return zynqmp_get_silicon_version_secure();
 142
 143         gd->cpu_clk = get_tbclk();
 144
 145         switch (gd->cpu_clk) {
 146         case 50000000:
 147                 return ZYNQMP_CSU_VERSION_QEMU;
 148         }
 149
 150         return ZYNQMP_CSU_VERSION_SILICON;
 151 }
 152
 153 #define ZYNQMP_MMIO_READ        0xC2000014
 154 #define ZYNQMP_MMIO_WRITE       0xC2000013
 155
 156 int __maybe_unused invoke_smc(u32 pm_api_id, u32 arg0, u32 arg1, u32 arg2,
 157                               u32 arg3, u32 *ret_payload)
 158 {
 159         /*
 160          * Added SIP service call Function Identifier
 161          * Make sure to stay in x0 register
 162          */
 163         struct pt_regs regs;
 164
 165         regs.regs[0] = pm_api_id;
 166         regs.regs[1] = ((u64)arg1 << 32) | arg0;
 167         regs.regs[2] = ((u64)arg3 << 32) | arg2;
 168
 169         smc_call(&regs);
 170
 171         if (ret_payload != NULL) {
 172                 ret_payload[0] = (u32)regs.regs[0];
 173                 ret_payload[1] = upper_32_bits(regs.regs[0]);
 174                 ret_payload[2] = (u32)regs.regs[1];
 175                 ret_payload[3] = upper_32_bits(regs.regs[1]);
 176                 ret_payload[4] = (u32)regs.regs[2];
 177         }
 178
 179         return regs.regs[0];
 180 }
 181
 182 unsigned int  __maybe_unused zynqmp_pmufw_version(void)
 183 {
 184         int ret;
 185         u32 ret_payload[PAYLOAD_ARG_CNT];
 186         static u32 pm_api_version = ZYNQMP_PM_VERSION_INVALID;
 187
 188         /*
 189          * Get PMU version only once and later
 190          * just return stored values instead of
 191          * asking PMUFW again.
 192          */
 193         if (pm_api_version == ZYNQMP_PM_VERSION_INVALID) {
 194                 ret = invoke_smc(ZYNQMP_SIP_SVC_GET_API_VERSION, 0, 0, 0, 0,
 195                                  ret_payload);
 196                 pm_api_version = ret_payload[1];
 197
 198                 if (ret)
 199                         panic("PMUFW is not found - Please load it!\n");
 200         }
 201
 202         return pm_api_version;
 203 }
 204
 205 static int zynqmp_mmio_rawwrite(const u32 address,
 206                       const u32 mask,
 207                       const u32 value)
 208 {
 209         u32 data;
 210         u32 value_local = value;
 211         int ret;
 212
 213         ret = zynqmp_mmio_read(address, &data);
 214         if (ret)
 215                 return ret;
 216
 217         data &= ~mask;
 218         value_local &= mask;
 219         value_local |= data;
 220         writel(value_local, (ulong)address);
 221         return 0;
 222 }
 223
 224 static int zynqmp_mmio_rawread(const u32 address, u32 *value)
 225 {
 226         *value = readl((ulong)address);
 227         return 0;
 228 }
 229
 230 int zynqmp_mmio_write(const u32 address,
 231                       const u32 mask,
 232                       const u32 value)
 233 {
 234         if (IS_ENABLED(CONFIG_SPL_BUILD) || current_el() == 3)
 235                 return zynqmp_mmio_rawwrite(address, mask, value);
 236         else
 237                 return invoke_smc(ZYNQMP_MMIO_WRITE, address, mask,
 238                                   value, 0, NULL);
 239
 240         return -EINVAL;
 241 }
 242
 243 int zynqmp_mmio_read(const u32 address, u32 *value)
 244 {
 245         u32 ret_payload[PAYLOAD_ARG_CNT];
 246         u32 ret;
 247
 248         if (!value)
 249                 return -EINVAL;
 250
 251         if (IS_ENABLED(CONFIG_SPL_BUILD) || current_el() == 3) {
 252                 ret = zynqmp_mmio_rawread(address, value);
 253         } else {
 254                 ret = invoke_smc(ZYNQMP_MMIO_READ, address, 0, 0,
 255                                  0, ret_payload);
 256                 *value = ret_payload[1];
 257         }
 258
 259         return ret;
 260 }