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
  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             g_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             g_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);