hw/petalogix_s3adsp1800_mmu.c

   1 /*
   2  * Model of Petalogix linux reference design targeting Xilinx Spartan 3ADSP-1800
   3  * boards.
   4  *
   5  * Copyright (c) 2009 Edgar E. Iglesias.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25
  26 #include "sysbus.h"
  27 #include "hw.h"
  28 #include "net.h"
  29 #include "flash.h"
  30 #include "sysemu.h"
  31 #include "devices.h"
  32 #include "boards.h"
  33 #include "device_tree.h"
  34 #include "xilinx.h"
  35 #include "loader.h"
  36 #include "elf.h"
  37
  38 #define LMB_BRAM_SIZE  (128 * 1024)
  39 #define FLASH_SIZE     (16 * 1024 * 1024)
  40
  41 static struct
  42 {
  43     uint32_t bootstrap_pc;
  44     uint32_t cmdline;
  45     uint32_t fdt;
  46 } boot_info;
  47
  48 static void main_cpu_reset(void *opaque)
  49 {
  50     CPUState *env = opaque;
  51
  52     cpu_reset(env);
  53     env->regs[5] = boot_info.cmdline;
  54     env->regs[7] = boot_info.fdt;
  55     env->sregs[SR_PC] = boot_info.bootstrap_pc;
  56 }
  57
  58 #define BINARY_DEVICE_TREE_FILE "petalogix-s3adsp1800.dtb"
  59 static int petalogix_load_device_tree(target_phys_addr_t addr,
  60                                       uint32_t ramsize,
  61                                       target_phys_addr_t initrd_base,
  62                                       target_phys_addr_t initrd_size,
  63                                       const char *kernel_cmdline)
  64 {
  65     char *path;
  66     int fdt_size;
  67 #ifdef CONFIG_FDT
  68     void *fdt;
  69     int r;
  70
  71     /* Try the local "mb.dtb" override.  */
  72     fdt = load_device_tree("mb.dtb", &fdt_size);
  73     if (!fdt) {
  74         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
  75         if (path) {
  76             fdt = load_device_tree(path, &fdt_size);
  77             qemu_free(path);
  78         }
  79         if (!fdt)
  80             return 0;
  81     }
  82
  83     r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
  84     if (r < 0)
  85         fprintf(stderr, "couldn't set /chosen/bootargs\n");
  86     cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
  87 #else
  88     /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
  89        to the kernel.  */
  90     fdt_size = load_image_targphys("mb.dtb", addr, 0x10000);
  91     if (fdt_size < 0) {
  92         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
  93         if (path) {
  94             fdt_size = load_image_targphys(path, addr, 0x10000);
  95             qemu_free(path);
  96         }
  97     }
  98
  99     if (kernel_cmdline) {
 100         fprintf(stderr,
 101                 "Warning: missing libfdt, cannot pass cmdline to kernel!\n");
 102     }
 103 #endif
 104     return fdt_size;
 105 }
 106
 107 static void
 108 petalogix_s3adsp1800_init(ram_addr_t ram_size,
 109                           const char *boot_device,
 110                           const char *kernel_filename,
 111                           const char *kernel_cmdline,
 112                           const char *initrd_filename, const char *cpu_model)
 113 {
 114     DeviceState *dev;
 115     CPUState *env;
 116     int kernel_size;
 117     DriveInfo *dinfo;
 118     int i;
 119     target_phys_addr_t ddr_base = 0x90000000;
 120     ram_addr_t phys_lmb_bram;
 121     ram_addr_t phys_ram;
 122     ram_addr_t phys_flash;
 123     qemu_irq irq[32], *cpu_irq;
 124
 125     /* init CPUs */
 126     if (cpu_model == NULL) {
 127         cpu_model = "microblaze";
 128     }
 129     env = cpu_init(cpu_model);
 130
 131     env->pvr.regs[10] = 0x0c000000; /* spartan 3a dsp family.  */
 132     qemu_register_reset(main_cpu_reset, env);
 133
 134     /* Attach emulated BRAM through the LMB.  */
 135     phys_lmb_bram = qemu_ram_alloc(LMB_BRAM_SIZE);
 136     cpu_register_physical_memory(0x00000000, LMB_BRAM_SIZE,
 137                                  phys_lmb_bram | IO_MEM_RAM);
 138
 139     phys_ram = qemu_ram_alloc(ram_size);
 140     cpu_register_physical_memory(ddr_base, ram_size, phys_ram | IO_MEM_RAM);
 141
 142     phys_flash = qemu_ram_alloc(FLASH_SIZE);
 143     dinfo = drive_get(IF_PFLASH, 0, 0);
 144     pflash_cfi02_register(0xa0000000, phys_flash,
 145                           dinfo ? dinfo->bdrv : NULL, (64 * 1024),
 146                           FLASH_SIZE >> 16,
 147                           1, 1, 0x0000, 0x0000, 0x0000, 0x0000,
 148                           0x555, 0x2aa);
 149
 150     cpu_irq = microblaze_pic_init_cpu(env);
 151     dev = xilinx_intc_create(0x81800000, cpu_irq[0], 2);
 152     for (i = 0; i < 32; i++) {
 153         irq[i] = qdev_get_gpio_in(dev, i);
 154     }
 155
 156     sysbus_create_simple("xilinx,uartlite", 0x84000000, irq[3]);
 157     /* 2 timers at irq 2 @ 62 Mhz.  */
 158     xilinx_timer_create(0x83c00000, irq[0], 2, 62 * 1000000);
 159     xilinx_ethlite_create(&nd_table[0], 0x81000000, irq[1], 0, 0);
 160
 161     if (kernel_filename) {
 162         uint64_t entry, low, high;
 163         int kcmdline_len;
 164         uint32_t base32;
 165
 166         /* Boots a kernel elf binary.  */
 167         kernel_size = load_elf(kernel_filename, 0,
 168                                &entry, &low, &high,
 169                                1, ELF_MACHINE, 0);
 170         base32 = entry;
 171         if (base32 == 0xc0000000) {
 172             kernel_size = load_elf(kernel_filename, -0x30000000LL,
 173                                    &entry, NULL, NULL,
 174                                    1, ELF_MACHINE, 0);
 175         }
 176         /* Always boot into physical ram.  */
 177         boot_info.bootstrap_pc = ddr_base + (entry & 0x0fffffff);
 178         if (kernel_size < 0) {
 179             /* If we failed loading ELF's try a raw image.  */
 180             kernel_size = load_image_targphys(kernel_filename, ddr_base,
 181                                               ram_size);
 182             boot_info.bootstrap_pc = ddr_base;
 183         }
 184
 185         boot_info.cmdline = ddr_base + kernel_size + 8192;
 186         if (kernel_cmdline && (kcmdline_len = strlen(kernel_cmdline))) {
 187             pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
 188         }
 189         /* Provide a device-tree.  */
 190         boot_info.fdt = boot_info.cmdline + 256;
 191         petalogix_load_device_tree(boot_info.fdt, ram_size,
 192                                    0, 0,
 193                                    kernel_cmdline);
 194     }
 195 }
 196
 197 static QEMUMachine petalogix_s3adsp1800_machine = {
 198     .name = "petalogix-s3adsp1800",
 199     .desc = "Petalogix linux refdesign for xilinx Spartan 3ADSP1800",
 200     .init = petalogix_s3adsp1800_init,
 201     .is_default = 1
 202 };
 203
 204 static void petalogix_s3adsp1800_machine_init(void)
 205 {
 206     qemu_register_machine(&petalogix_s3adsp1800_machine);
 207 }
 208
 209 machine_init(petalogix_s3adsp1800_machine_init);