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 "xilinx_axidma.h" 43 44 #define LMB_BRAM_SIZE (128 * 1024) 45 #define FLASH_SIZE (32 * 1024 * 1024) 46 47 static struct 48 { 49 uint32_t bootstrap_pc; 50 uint32_t cmdline; 51 uint32_t fdt; 52 } boot_info; 53 54 static void main_cpu_reset(void *opaque) 55 { 56 CPUState *env = opaque; 57 58 cpu_reset(env); 59 env->regs[5] = boot_info.cmdline; 60 env->regs[7] = boot_info.fdt; 61 env->sregs[SR_PC] = boot_info.bootstrap_pc; 62 env->pvr.regs[10] = 0x0e000000; /* virtex 6 */ 63 /* setup pvr to match kernel setting */ 64 env->pvr.regs[5] |= PVR5_DCACHE_WRITEBACK_MASK; 65 env->pvr.regs[0] |= PVR0_USE_FPU_MASK | PVR0_ENDI; 66 env->pvr.regs[0] = (env->pvr.regs[0] & ~PVR0_VERSION_MASK) | (0x14 << 8); 67 env->pvr.regs[2] ^= PVR2_USE_FPU2_MASK; 68 env->pvr.regs[4] = 0xc56b8000; 69 env->pvr.regs[5] = 0xc56be000; 70 } 71 72 #define BINARY_DEVICE_TREE_FILE "petalogix-ml605.dtb" 73 static int petalogix_load_device_tree(target_phys_addr_t addr, 74 uint32_t ramsize, 75 target_phys_addr_t initrd_base, 76 target_phys_addr_t initrd_size, 77 const char *kernel_cmdline) 78 { 79 char *path; 80 int fdt_size; 81 #ifdef CONFIG_FDT 82 void *fdt; 83 int r; 84 85 /* Try the local "mb.dtb" override. */ 86 fdt = load_device_tree("mb.dtb", &fdt_size); 87 if (!fdt) { 88 path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE); 89 if (path) { 90 fdt = load_device_tree(path, &fdt_size); 91 qemu_free(path); 92 } 93 if (!fdt) { 94 return 0; 95 } 96 } 97 98 r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline); 99 if (r < 0) { 100 fprintf(stderr, "couldn't set /chosen/bootargs\n"); 101 } 102 cpu_physical_memory_write(addr, (void *)fdt, fdt_size); 103 #else 104 /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob 105 to the kernel. */ 106 fdt_size = load_image_targphys("mb.dtb", addr, 0x10000); 107 if (fdt_size < 0) { 108 path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE); 109 if (path) { 110 fdt_size = load_image_targphys(path, addr, 0x10000); 111 qemu_free(path); 112 } 113 } 114 115 if (kernel_cmdline) { 116 fprintf(stderr, 117 "Warning: missing libfdt, cannot pass cmdline to kernel!\n"); 118 } 119 #endif 120 return fdt_size; 121 } 122 123 static uint64_t translate_kernel_address(void *opaque, uint64_t addr) 124 { 125 return addr - 0x30000000LL; 126 } 127 128 #define MEMORY_BASEADDR 0x50000000 129 #define FLASH_BASEADDR 0x86000000 130 #define INTC_BASEADDR 0x81800000 131 #define TIMER_BASEADDR 0x83c00000 132 #define UART16550_BASEADDR 0x83e00000 133 #define AXIENET_BASEADDR 0x82780000 134 #define AXIDMA_BASEADDR 0x84600000 135 136 static void 137 petalogix_ml605_init(ram_addr_t ram_size, 138 const char *boot_device, 139 const char *kernel_filename, 140 const char *kernel_cmdline, 141 const char *initrd_filename, const char *cpu_model) 142 { 143 DeviceState *dev; 144 CPUState *env; 145 int kernel_size; 146 DriveInfo *dinfo; 147 int i; 148 target_phys_addr_t ddr_base = MEMORY_BASEADDR; 149 ram_addr_t phys_lmb_bram; 150 ram_addr_t phys_ram; 151 ram_addr_t phys_flash; 152 qemu_irq irq[32], *cpu_irq; 153 154 /* init CPUs */ 155 if (cpu_model == NULL) { 156 cpu_model = "microblaze"; 157 } 158 env = cpu_init(cpu_model); 159 160 qemu_register_reset(main_cpu_reset, env); 161 162 /* Attach emulated BRAM through the LMB. */ 163 phys_lmb_bram = qemu_ram_alloc(NULL, "petalogix_ml605.lmb_bram", 164 LMB_BRAM_SIZE); 165 cpu_register_physical_memory(0x00000000, LMB_BRAM_SIZE, 166 phys_lmb_bram | IO_MEM_RAM); 167 168 phys_ram = qemu_ram_alloc(NULL, "petalogix_ml605.ram", ram_size); 169 cpu_register_physical_memory(ddr_base, ram_size, phys_ram | IO_MEM_RAM); 170 171 phys_flash = qemu_ram_alloc(NULL, "petalogix_ml605.flash", FLASH_SIZE); 172 dinfo = drive_get(IF_PFLASH, 0, 0); 173 /* 5th parameter 2 means bank-width 174 * 10th paremeter 0 means little-endian */ 175 pflash_cfi01_register(FLASH_BASEADDR, phys_flash, 176 dinfo ? dinfo->bdrv : NULL, (64 * 1024), 177 FLASH_SIZE >> 16, 178 2, 0x89, 0x18, 0x0000, 0x0, 0); 179 180 181 cpu_irq = microblaze_pic_init_cpu(env); 182 dev = xilinx_intc_create(INTC_BASEADDR, cpu_irq[0], 4); 183 for (i = 0; i < 32; i++) { 184 irq[i] = qdev_get_gpio_in(dev, i); 185 } 186 187 serial_mm_init(UART16550_BASEADDR + 0x1000, 2, irq[5], 115200, 188 serial_hds[0], 1, 0); 189 190 /* 2 timers at irq 2 @ 100 Mhz. */ 191 xilinx_timer_create(TIMER_BASEADDR, irq[2], 2, 100 * 1000000); 192 193 /* axi ethernet and dma initialization. TODO: Dynamically connect them. */ 194 { 195 static struct XilinxDMAConnection dmach; 196 197 xilinx_axiethernet_create(&dmach, &nd_table[0], 0x82780000, 198 irq[3], 0x1000, 0x1000); 199 xilinx_axiethernetdma_create(&dmach, 0x84600000, 200 irq[1], irq[0], 100 * 1000000); 201 } 202 203 if (kernel_filename) { 204 uint64_t entry, low, high; 205 uint32_t base32; 206 int big_endian = 0; 207 208 #ifdef TARGET_WORDS_BIGENDIAN 209 big_endian = 1; 210 #endif 211 212 /* Boots a kernel elf binary. */ 213 kernel_size = load_elf(kernel_filename, NULL, NULL, 214 &entry, &low, &high, 215 big_endian, ELF_MACHINE, 0); 216 base32 = entry; 217 if (base32 == 0xc0000000) { 218 kernel_size = load_elf(kernel_filename, translate_kernel_address, 219 NULL, &entry, NULL, NULL, 220 big_endian, ELF_MACHINE, 0); 221 } 222 /* Always boot into physical ram. */ 223 boot_info.bootstrap_pc = ddr_base + (entry & 0x0fffffff); 224 225 /* If it wasn't an ELF image, try an u-boot image. */ 226 if (kernel_size < 0) { 227 target_phys_addr_t uentry, loadaddr; 228 229 kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0); 230 boot_info.bootstrap_pc = uentry; 231 high = (loadaddr + kernel_size + 3) & ~3; 232 } 233 234 /* Not an ELF image nor an u-boot image, try a RAW image. */ 235 if (kernel_size < 0) { 236 kernel_size = load_image_targphys(kernel_filename, ddr_base, 237 ram_size); 238 boot_info.bootstrap_pc = ddr_base; 239 high = (ddr_base + kernel_size + 3) & ~3; 240 } 241 242 boot_info.cmdline = high + 4096; 243 if (kernel_cmdline && strlen(kernel_cmdline)) { 244 pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline); 245 } 246 /* Provide a device-tree. */ 247 boot_info.fdt = boot_info.cmdline + 4096; 248 petalogix_load_device_tree(boot_info.fdt, ram_size, 249 0, 0, 250 kernel_cmdline); 251 } 252 } 253 254 static QEMUMachine petalogix_ml605_machine = { 255 .name = "petalogix-ml605", 256 .desc = "PetaLogix linux refdesign for xilinx ml605 little endian", 257 .init = petalogix_ml605_init, 258 .is_default = 0 259 }; 260 261 static void petalogix_ml605_machine_init(void) 262 { 263 qemu_register_machine(&petalogix_ml605_machine); 264 } 265 266 machine_init(petalogix_ml605_machine_init); 267