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
  36 #define LMB_BRAM_SIZE  (128 * 1024)
  37 #define FLASH_SIZE     (16 * 1024 * 1024)
  38
  39 static uint32_t bootstrap_pc;
  40
  41 static void main_cpu_reset(void *opaque)
  42 {
  43     CPUState *env = opaque;
  44     cpu_reset(env);
  45     env->sregs[SR_PC] = bootstrap_pc;
  46 }
  47
  48 #define BINARY_DEVICE_TREE_FILE "petalogix-s3adsp1800.dtb"
  49 static int petalogix_load_device_tree(target_phys_addr_t addr,
  50                                       uint32_t ramsize,
  51                                       target_phys_addr_t initrd_base,
  52                                       target_phys_addr_t initrd_size,
  53                                       const char *kernel_cmdline)
  54 {
  55     void *fdt;
  56     char *path = NULL;
  57     int fdt_size;
  58     int pathlen;
  59     int r;
  60
  61     /* Try the local "mb.dtb" override.  */
  62     fdt = load_device_tree("mb.dtb", &fdt_size);
  63     if (!fdt) {
  64         pathlen = snprintf(NULL, 0, "%s/%s",
  65                            bios_dir, BINARY_DEVICE_TREE_FILE) + 1;
  66         path = qemu_malloc(pathlen);
  67         snprintf(path, pathlen, "%s/%s", bios_dir, BINARY_DEVICE_TREE_FILE);
  68         fdt = load_device_tree(BINARY_DEVICE_TREE_FILE, &fdt_size);
  69         free(path);
  70         if (!fdt)
  71             return 0;
  72     }
  73
  74     r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
  75     if (r < 0)
  76         fprintf(stderr, "couldn't set /chosen/bootargs\n");
  77     printf("write fdt to addr=%x fdtsize=%d\n", addr, fdt_size);
  78     cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
  79     return fdt_size;
  80 }
  81
  82 static void
  83 petalogix_s3adsp1800_init(ram_addr_t ram_size,
  84                           const char *boot_device,
  85                           const char *kernel_filename,
  86                           const char *kernel_cmdline,
  87                           const char *initrd_filename, const char *cpu_model)
  88 {
  89     DeviceState *dev;
  90     CPUState *env;
  91     int kernel_size;
  92     int i;
  93     target_phys_addr_t ddr_base = 0x90000000;
  94     ram_addr_t phys_lmb_bram;
  95     ram_addr_t phys_ram;
  96     ram_addr_t phys_flash;
  97     qemu_irq irq[32], *cpu_irq;
  98
  99     /* init CPUs */
 100     if (cpu_model == NULL) {
 101         cpu_model = "microblaze";
 102     }
 103     env = cpu_init(cpu_model);
 104
 105     env->pvr.regs[10] = 0x0c000000; /* spartan 3a dsp family.  */
 106     qemu_register_reset(main_cpu_reset, 0, env);
 107
 108     /* Attach emulated BRAM through the LMB.  */
 109     phys_lmb_bram = qemu_ram_alloc(LMB_BRAM_SIZE);
 110     cpu_register_physical_memory(0x00000000, LMB_BRAM_SIZE,
 111                                  phys_lmb_bram | IO_MEM_RAM);
 112
 113     phys_ram = qemu_ram_alloc(ram_size);
 114     cpu_register_physical_memory(ddr_base, ram_size, phys_ram | IO_MEM_RAM);
 115
 116     phys_flash = qemu_ram_alloc(FLASH_SIZE);
 117     i = drive_get_index(IF_PFLASH, 0, 0);
 118     pflash_cfi02_register(0xa0000000, phys_flash,
 119                           i != -1 ? drives_table[i].bdrv : NULL, (64 * 1024),
 120                           FLASH_SIZE >> 16,
 121                           1, 1, 0x0000, 0x0000, 0x0000, 0x0000,
 122                           0x555, 0x2aa);
 123
 124     cpu_irq = microblaze_pic_init_cpu(env);
 125     dev = xilinx_intc_create(0x81800000, cpu_irq[0], 2);
 126     for (i = 0; i < 32; i++) {
 127         irq[i] = qdev_get_gpio_in(dev, i);
 128     }
 129
 130     sysbus_create_simple("xilinx,uartlite", 0x84000000, irq[3]);
 131     /* 2 timers at irq 2 @ 62 Mhz.  */
 132     xilinx_timer_create(0x83c00000, irq[0], 2, 62 * 1000000);
 133     xilinx_ethlite_create(&nd_table[0], 0x81000000, irq[1], 0, 0);
 134
 135     if (kernel_filename) {
 136         uint64_t entry, low, high;
 137         int kcmdline_len;
 138         uint32_t base32;
 139
 140         /* Boots a kernel elf binary.  */
 141         kernel_size = load_elf(kernel_filename, 0,
 142                                &entry, &low, &high);
 143         base32 = entry;
 144         if (base32 == 0xc0000000) {
 145             kernel_size = load_elf(kernel_filename, -0x30000000LL,
 146                                    &entry, NULL, NULL);
 147         }
 148         /* Always boot into physical ram.  */
 149         bootstrap_pc = ddr_base + (entry & 0x0fffffff);
 150         if (kernel_size < 0) {
 151             /* If we failed loading ELF's try a raw image.  */
 152             kernel_size = load_image_targphys(kernel_filename, ddr_base,
 153                                               ram_size);
 154             bootstrap_pc = ddr_base;
 155         }
 156
 157         env->regs[5] = ddr_base + kernel_size;
 158         if (kernel_cmdline && (kcmdline_len = strlen(kernel_cmdline))) {
 159             pstrcpy_targphys(env->regs[5], 256, kernel_cmdline);
 160         }
 161         env->regs[6] = 0;
 162         /* Provide a device-tree.  */
 163         env->regs[7] = ddr_base + kernel_size + 256;
 164         petalogix_load_device_tree(env->regs[7], ram_size,
 165                                    env->regs[6], 0,
 166                                    kernel_cmdline);
 167     }
 168
 169     env->sregs[SR_PC] = bootstrap_pc;
 170 }
 171
 172 static QEMUMachine petalogix_s3adsp1800_machine = {
 173     .name = "petalogix-s3adsp1800",
 174     .desc = "Petalogix linux refdesign for xilinx Spartan 3ADSP1800",
 175     .init = petalogix_s3adsp1800_init,
 176     .is_default = 1
 177 };
 178
 179 static void petalogix_s3adsp1800_machine_init(void)
 180 {
 181     qemu_register_machine(&petalogix_s3adsp1800_machine);
 182 }
 183
 184 machine_init(petalogix_s3adsp1800_machine_init);