1 /* 2 * Model of Petalogix linux reference design targeting Xilinx Spartan ml605 3 * board. 4 * 5 * Copyright (c) 2011 Michal Simek <monstr@monstr.eu> 6 * Copyright (c) 2011 PetaLogix 7 * Copyright (c) 2009 Edgar E. Iglesias. 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a copy 10 * of this software and associated documentation files (the "Software"), to deal 11 * in the Software without restriction, including without limitation the rights 12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 13 * copies of the Software, and to permit persons to whom the Software is 14 * furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included in 17 * all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 25 * THE SOFTWARE. 26 */ 27 28 #include "sysbus.h" 29 #include "hw.h" 30 #include "net.h" 31 #include "flash.h" 32 #include "sysemu.h" 33 #include "devices.h" 34 #include "boards.h" 35 #include "device_tree.h" 36 #include "xilinx.h" 37 #include "loader.h" 38 #include "elf.h" 39 #include "blockdev.h" 40 #include "pc.h" 41 42 #include "microblaze_pic_cpu.h" 43 #include "xilinx_axidma.h" 44 45 #define LMB_BRAM_SIZE (128 * 1024) 46 #define FLASH_SIZE (32 * 1024 * 1024) 47 48 static struct 49 { 50 uint32_t bootstrap_pc; 51 uint32_t cmdline; 52 uint32_t fdt; 53 } boot_info; 54 55 static void main_cpu_reset(void *opaque) 56 { 57 CPUState *env = opaque; 58 59 cpu_reset(env); 60 env->regs[5] = boot_info.cmdline; 61 env->regs[7] = boot_info.fdt; 62 env->sregs[SR_PC] = boot_info.bootstrap_pc; 63 env->pvr.regs[10] = 0x0e000000; /* virtex 6 */ 64 /* setup pvr to match kernel setting */ 65 env->pvr.regs[5] |= PVR5_DCACHE_WRITEBACK_MASK; 66 env->pvr.regs[0] |= PVR0_USE_FPU_MASK | PVR0_ENDI; 67 env->pvr.regs[0] = (env->pvr.regs[0] & ~PVR0_VERSION_MASK) | (0x14 << 8); 68 env->pvr.regs[2] ^= PVR2_USE_FPU2_MASK; 69 env->pvr.regs[4] = 0xc56b8000; 70 env->pvr.regs[5] = 0xc56be000; 71 } 72 73 #define BINARY_DEVICE_TREE_FILE "petalogix-ml605.dtb" 74 static int petalogix_load_device_tree(target_phys_addr_t addr, 75 uint32_t ramsize, 76 target_phys_addr_t initrd_base, 77 target_phys_addr_t initrd_size, 78 const char *kernel_cmdline) 79 { 80 char *path; 81 int fdt_size; 82 #ifdef CONFIG_FDT 83 void *fdt; 84 int r; 85 86 /* Try the local "mb.dtb" override. */ 87 fdt = load_device_tree("mb.dtb", &fdt_size); 88 if (!fdt) { 89 path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE); 90 if (path) { 91 fdt = load_device_tree(path, &fdt_size); 92 g_free(path); 93 } 94 if (!fdt) { 95 return 0; 96 } 97 } 98 99 r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline); 100 if (r < 0) { 101 fprintf(stderr, "couldn't set /chosen/bootargs\n"); 102 } 103 cpu_physical_memory_write(addr, (void *)fdt, fdt_size); 104 #else 105 /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob 106 to the kernel. */ 107 fdt_size = load_image_targphys("mb.dtb", addr, 0x10000); 108 if (fdt_size < 0) { 109 path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE); 110 if (path) { 111 fdt_size = load_image_targphys(path, addr, 0x10000); 112 g_free(path); 113 } 114 } 115 116 if (kernel_cmdline) { 117 fprintf(stderr, 118 "Warning: missing libfdt, cannot pass cmdline to kernel!\n"); 119 } 120 #endif 121 return fdt_size; 122 } 123 124 static uint64_t translate_kernel_address(void *opaque, uint64_t addr) 125 { 126 return addr - 0x30000000LL; 127 } 128 129 #define MEMORY_BASEADDR 0x50000000 130 #define FLASH_BASEADDR 0x86000000 131 #define INTC_BASEADDR 0x81800000 132 #define TIMER_BASEADDR 0x83c00000 133 #define UART16550_BASEADDR 0x83e00000 134 #define AXIENET_BASEADDR 0x82780000 135 #define AXIDMA_BASEADDR 0x84600000 136 137 static void 138 petalogix_ml605_init(ram_addr_t ram_size, 139 const char *boot_device, 140 const char *kernel_filename, 141 const char *kernel_cmdline, 142 const char *initrd_filename, const char *cpu_model) 143 { 144 DeviceState *dev; 145 CPUState *env; 146 int kernel_size; 147 DriveInfo *dinfo; 148 int i; 149 target_phys_addr_t ddr_base = MEMORY_BASEADDR; 150 ram_addr_t phys_lmb_bram; 151 ram_addr_t phys_ram; 152 ram_addr_t phys_flash; 153 qemu_irq irq[32], *cpu_irq; 154 155 /* init CPUs */ 156 if (cpu_model == NULL) { 157 cpu_model = "microblaze"; 158 } 159 env = cpu_init(cpu_model); 160 161 qemu_register_reset(main_cpu_reset, env); 162 163 /* Attach emulated BRAM through the LMB. */ 164 phys_lmb_bram = qemu_ram_alloc(NULL, "petalogix_ml605.lmb_bram", 165 LMB_BRAM_SIZE); 166 cpu_register_physical_memory(0x00000000, LMB_BRAM_SIZE, 167 phys_lmb_bram | IO_MEM_RAM); 168 169 phys_ram = qemu_ram_alloc(NULL, "petalogix_ml605.ram", ram_size); 170 cpu_register_physical_memory(ddr_base, ram_size, phys_ram | IO_MEM_RAM); 171 172 phys_flash = qemu_ram_alloc(NULL, "petalogix_ml605.flash", FLASH_SIZE); 173 dinfo = drive_get(IF_PFLASH, 0, 0); 174 /* 5th parameter 2 means bank-width 175 * 10th paremeter 0 means little-endian */ 176 pflash_cfi01_register(FLASH_BASEADDR, phys_flash, 177 dinfo ? dinfo->bdrv : NULL, (64 * 1024), 178 FLASH_SIZE >> 16, 179 2, 0x89, 0x18, 0x0000, 0x0, 0); 180 181 182 cpu_irq = microblaze_pic_init_cpu(env); 183 dev = xilinx_intc_create(INTC_BASEADDR, cpu_irq[0], 4); 184 for (i = 0; i < 32; i++) { 185 irq[i] = qdev_get_gpio_in(dev, i); 186 } 187 188 serial_mm_init(UART16550_BASEADDR + 0x1000, 2, irq[5], 115200, 189 serial_hds[0], 1, 0); 190 191 /* 2 timers at irq 2 @ 100 Mhz. */ 192 xilinx_timer_create(TIMER_BASEADDR, irq[2], 2, 100 * 1000000); 193 194 /* axi ethernet and dma initialization. TODO: Dynamically connect them. */ 195 { 196 static struct XilinxDMAConnection dmach; 197 198 xilinx_axiethernet_create(&dmach, &nd_table[0], 0x82780000, 199 irq[3], 0x1000, 0x1000); 200 xilinx_axiethernetdma_create(&dmach, 0x84600000, 201 irq[1], irq[0], 100 * 1000000); 202 } 203 204 if (kernel_filename) { 205 uint64_t entry, low, high; 206 uint32_t base32; 207 int big_endian = 0; 208 209 #ifdef TARGET_WORDS_BIGENDIAN 210 big_endian = 1; 211 #endif 212 213 /* Boots a kernel elf binary. */ 214 kernel_size = load_elf(kernel_filename, NULL, NULL, 215 &entry, &low, &high, 216 big_endian, ELF_MACHINE, 0); 217 base32 = entry; 218 if (base32 == 0xc0000000) { 219 kernel_size = load_elf(kernel_filename, translate_kernel_address, 220 NULL, &entry, NULL, NULL, 221 big_endian, ELF_MACHINE, 0); 222 } 223 /* Always boot into physical ram. */ 224 boot_info.bootstrap_pc = ddr_base + (entry & 0x0fffffff); 225 226 /* If it wasn't an ELF image, try an u-boot image. */ 227 if (kernel_size < 0) { 228 target_phys_addr_t uentry, loadaddr; 229 230 kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0); 231 boot_info.bootstrap_pc = uentry; 232 high = (loadaddr + kernel_size + 3) & ~3; 233 } 234 235 /* Not an ELF image nor an u-boot image, try a RAW image. */ 236 if (kernel_size < 0) { 237 kernel_size = load_image_targphys(kernel_filename, ddr_base, 238 ram_size); 239 boot_info.bootstrap_pc = ddr_base; 240 high = (ddr_base + kernel_size + 3) & ~3; 241 } 242 243 boot_info.cmdline = high + 4096; 244 if (kernel_cmdline && strlen(kernel_cmdline)) { 245 pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline); 246 } 247 /* Provide a device-tree. */ 248 boot_info.fdt = boot_info.cmdline + 4096; 249 petalogix_load_device_tree(boot_info.fdt, ram_size, 250 0, 0, 251 kernel_cmdline); 252 } 253 } 254 255 static QEMUMachine petalogix_ml605_machine = { 256 .name = "petalogix-ml605", 257 .desc = "PetaLogix linux refdesign for xilinx ml605 little endian", 258 .init = petalogix_ml605_init, 259 .is_default = 0 260 }; 261 262 static void petalogix_ml605_machine_init(void) 263 { 264 qemu_register_machine(&petalogix_ml605_machine); 265 } 266 267 machine_init(petalogix_ml605_machine_init); 268