hw/petalogix_ml605_mmu.c

   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 #include "exec-memory.h"
  42
  43 #include "microblaze_pic_cpu.h"
  44 #include "xilinx_axidma.h"
  45
  46 #define LMB_BRAM_SIZE  (128 * 1024)
  47 #define FLASH_SIZE     (32 * 1024 * 1024)
  48
  49 static struct
  50 {
  51     uint32_t bootstrap_pc;
  52     uint32_t cmdline;
  53     uint32_t fdt;
  54 } boot_info;
  55
  56 static void main_cpu_reset(void *opaque)
  57 {
  58     CPUState *env = opaque;
  59
  60     cpu_reset(env);
  61     env->regs[5] = boot_info.cmdline;
  62     env->regs[7] = boot_info.fdt;
  63     env->sregs[SR_PC] = boot_info.bootstrap_pc;
  64     env->pvr.regs[10] = 0x0e000000; /* virtex 6 */
  65     /* setup pvr to match kernel setting */
  66     env->pvr.regs[5] |= PVR5_DCACHE_WRITEBACK_MASK;
  67     env->pvr.regs[0] |= PVR0_USE_FPU_MASK | PVR0_ENDI;
  68     env->pvr.regs[0] = (env->pvr.regs[0] & ~PVR0_VERSION_MASK) | (0x14 << 8);
  69     env->pvr.regs[2] ^= PVR2_USE_FPU2_MASK;
  70     env->pvr.regs[4] = 0xc56b8000;
  71     env->pvr.regs[5] = 0xc56be000;
  72 }
  73
  74 #define BINARY_DEVICE_TREE_FILE "petalogix-ml605.dtb"
  75 static int petalogix_load_device_tree(target_phys_addr_t addr,
  76                                       uint32_t ramsize,
  77                                       target_phys_addr_t initrd_base,
  78                                       target_phys_addr_t initrd_size,
  79                                       const char *kernel_cmdline)
  80 {
  81     char *path;
  82     int fdt_size;
  83 #ifdef CONFIG_FDT
  84     void *fdt;
  85     int r;
  86
  87     /* Try the local "mb.dtb" override.  */
  88     fdt = load_device_tree("mb.dtb", &fdt_size);
  89     if (!fdt) {
  90         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
  91         if (path) {
  92             fdt = load_device_tree(path, &fdt_size);
  93             g_free(path);
  94         }
  95         if (!fdt) {
  96             return 0;
  97         }
  98     }
  99
 100     r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
 101     if (r < 0) {
 102         fprintf(stderr, "couldn't set /chosen/bootargs\n");
 103     }
 104     cpu_physical_memory_write(addr, (void *)fdt, fdt_size);
 105 #else
 106     /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
 107        to the kernel.  */
 108     fdt_size = load_image_targphys("mb.dtb", addr, 0x10000);
 109     if (fdt_size < 0) {
 110         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
 111         if (path) {
 112             fdt_size = load_image_targphys(path, addr, 0x10000);
 113             g_free(path);
 114         }
 115     }
 116
 117     if (kernel_cmdline) {
 118         fprintf(stderr,
 119                 "Warning: missing libfdt, cannot pass cmdline to kernel!\n");
 120     }
 121 #endif
 122     return fdt_size;
 123 }
 124
 125 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
 126 {
 127     return addr - 0x30000000LL;
 128 }
 129
 130 #define MEMORY_BASEADDR 0x50000000
 131 #define FLASH_BASEADDR 0x86000000
 132 #define INTC_BASEADDR 0x81800000
 133 #define TIMER_BASEADDR 0x83c00000
 134 #define UART16550_BASEADDR 0x83e00000
 135 #define AXIENET_BASEADDR 0x82780000
 136 #define AXIDMA_BASEADDR 0x84600000
 137
 138 static void
 139 petalogix_ml605_init(ram_addr_t ram_size,
 140                           const char *boot_device,
 141                           const char *kernel_filename,
 142                           const char *kernel_cmdline,
 143                           const char *initrd_filename, const char *cpu_model)
 144 {
 145     MemoryRegion *address_space_mem = get_system_memory();
 146     DeviceState *dev;
 147     CPUState *env;
 148     int kernel_size;
 149     DriveInfo *dinfo;
 150     int i;
 151     target_phys_addr_t ddr_base = MEMORY_BASEADDR;
 152     MemoryRegion *phys_lmb_bram = g_new(MemoryRegion, 1);
 153     MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
 154     qemu_irq irq[32], *cpu_irq;
 155
 156     /* init CPUs */
 157     if (cpu_model == NULL) {
 158         cpu_model = "microblaze";
 159     }
 160     env = cpu_init(cpu_model);
 161
 162     qemu_register_reset(main_cpu_reset, env);
 163
 164     /* Attach emulated BRAM through the LMB.  */
 165     memory_region_init_ram(phys_lmb_bram, "petalogix_ml605.lmb_bram",
 166                            LMB_BRAM_SIZE);
 167     vmstate_register_ram_global(phys_lmb_bram);
 168     memory_region_add_subregion(address_space_mem, 0x00000000, phys_lmb_bram);
 169
 170     memory_region_init_ram(phys_ram, "petalogix_ml605.ram", ram_size);
 171     vmstate_register_ram_global(phys_ram);
 172     memory_region_add_subregion(address_space_mem, ddr_base, phys_ram);
 173
 174     dinfo = drive_get(IF_PFLASH, 0, 0);
 175     /* 5th parameter 2 means bank-width
 176      * 10th paremeter 0 means little-endian */
 177     pflash_cfi01_register(FLASH_BASEADDR,
 178                           NULL, "petalogix_ml605.flash", FLASH_SIZE,
 179                           dinfo ? dinfo->bdrv : NULL, (64 * 1024),
 180                           FLASH_SIZE >> 16,
 181                           2, 0x89, 0x18, 0x0000, 0x0, 0);
 182
 183
 184     cpu_irq = microblaze_pic_init_cpu(env);
 185     dev = xilinx_intc_create(INTC_BASEADDR, cpu_irq[0], 4);
 186     for (i = 0; i < 32; i++) {
 187         irq[i] = qdev_get_gpio_in(dev, i);
 188     }
 189
 190     serial_mm_init(address_space_mem, UART16550_BASEADDR + 0x1000, 2,
 191                    irq[5], 115200, serial_hds[0], DEVICE_LITTLE_ENDIAN);
 192
 193     /* 2 timers at irq 2 @ 100 Mhz.  */
 194     xilinx_timer_create(TIMER_BASEADDR, irq[2], 2, 100 * 1000000);
 195
 196     /* axi ethernet and dma initialization. TODO: Dynamically connect them.  */
 197     {
 198         static struct XilinxDMAConnection dmach;
 199
 200         xilinx_axiethernet_create(&dmach, &nd_table[0], 0x82780000,
 201                                   irq[3], 0x1000, 0x1000);
 202         xilinx_axiethernetdma_create(&dmach, 0x84600000,
 203                                      irq[1], irq[0], 100 * 1000000);
 204     }
 205
 206     if (kernel_filename) {
 207         uint64_t entry, low, high;
 208         uint32_t base32;
 209         int big_endian = 0;
 210
 211 #ifdef TARGET_WORDS_BIGENDIAN
 212         big_endian = 1;
 213 #endif
 214
 215         /* Boots a kernel elf binary.  */
 216         kernel_size = load_elf(kernel_filename, NULL, NULL,
 217                                &entry, &low, &high,
 218                                big_endian, ELF_MACHINE, 0);
 219         base32 = entry;
 220         if (base32 == 0xc0000000) {
 221             kernel_size = load_elf(kernel_filename, translate_kernel_address,
 222                                    NULL, &entry, NULL, NULL,
 223                                    big_endian, ELF_MACHINE, 0);
 224         }
 225         /* Always boot into physical ram.  */
 226         boot_info.bootstrap_pc = ddr_base + (entry & 0x0fffffff);
 227
 228         /* If it wasn't an ELF image, try an u-boot image.  */
 229         if (kernel_size < 0) {
 230             target_phys_addr_t uentry, loadaddr;
 231
 232             kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0);
 233             boot_info.bootstrap_pc = uentry;
 234             high = (loadaddr + kernel_size + 3) & ~3;
 235         }
 236
 237         /* Not an ELF image nor an u-boot image, try a RAW image.  */
 238         if (kernel_size < 0) {
 239             kernel_size = load_image_targphys(kernel_filename, ddr_base,
 240                                               ram_size);
 241             boot_info.bootstrap_pc = ddr_base;
 242             high = (ddr_base + kernel_size + 3) & ~3;
 243         }
 244
 245         boot_info.cmdline = high + 4096;
 246         if (kernel_cmdline && strlen(kernel_cmdline)) {
 247             pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
 248         }
 249         /* Provide a device-tree.  */
 250         boot_info.fdt = boot_info.cmdline + 4096;
 251         petalogix_load_device_tree(boot_info.fdt, ram_size,
 252                                    0, 0,
 253                                    kernel_cmdline);
 254     }
 255 }
 256
 257 static QEMUMachine petalogix_ml605_machine = {
 258     .name = "petalogix-ml605",
 259     .desc = "PetaLogix linux refdesign for xilinx ml605 little endian",
 260     .init = petalogix_ml605_init,
 261     .is_default = 0
 262 };
 263
 264 static void petalogix_ml605_machine_init(void)
 265 {
 266     qemu_register_machine(&petalogix_ml605_machine);
 267 }
 268
 269 machine_init(petalogix_ml605_machine_init);