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 #include "blockdev.h"
  38
  39 #include "microblaze_pic_cpu.h"
  40
  41 #define LMB_BRAM_SIZE  (128 * 1024)
  42 #define FLASH_SIZE     (16 * 1024 * 1024)
  43
  44 static struct
  45 {
  46     uint32_t bootstrap_pc;
  47     uint32_t cmdline;
  48     uint32_t fdt;
  49 } boot_info;
  50
  51 static void main_cpu_reset(void *opaque)
  52 {
  53     CPUState *env = opaque;
  54
  55     cpu_reset(env);
  56     env->regs[5] = boot_info.cmdline;
  57     env->regs[7] = boot_info.fdt;
  58     env->sregs[SR_PC] = boot_info.bootstrap_pc;
  59 }
  60
  61 #define BINARY_DEVICE_TREE_FILE "petalogix-s3adsp1800.dtb"
  62 static int petalogix_load_device_tree(target_phys_addr_t addr,
  63                                       uint32_t ramsize,
  64                                       target_phys_addr_t initrd_base,
  65                                       target_phys_addr_t initrd_size,
  66                                       const char *kernel_cmdline)
  67 {
  68     char *path;
  69     int fdt_size;
  70 #ifdef CONFIG_FDT
  71     void *fdt;
  72     int r;
  73
  74     /* Try the local "mb.dtb" override.  */
  75     fdt = load_device_tree("mb.dtb", &fdt_size);
  76     if (!fdt) {
  77         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
  78         if (path) {
  79             fdt = load_device_tree(path, &fdt_size);
  80             g_free(path);
  81         }
  82         if (!fdt)
  83             return 0;
  84     }
  85
  86     r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
  87     if (r < 0)
  88         fprintf(stderr, "couldn't set /chosen/bootargs\n");
  89     cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
  90 #else
  91     /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
  92        to the kernel.  */
  93     fdt_size = load_image_targphys("mb.dtb", addr, 0x10000);
  94     if (fdt_size < 0) {
  95         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
  96         if (path) {
  97             fdt_size = load_image_targphys(path, addr, 0x10000);
  98             g_free(path);
  99         }
 100     }
 101
 102     if (kernel_cmdline) {
 103         fprintf(stderr,
 104                 "Warning: missing libfdt, cannot pass cmdline to kernel!\n");
 105     }
 106 #endif
 107     return fdt_size;
 108 }
 109
 110 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
 111 {
 112     return addr - 0x30000000LL;
 113 }
 114
 115 static void
 116 petalogix_s3adsp1800_init(ram_addr_t ram_size,
 117                           const char *boot_device,
 118                           const char *kernel_filename,
 119                           const char *kernel_cmdline,
 120                           const char *initrd_filename, const char *cpu_model)
 121 {
 122     DeviceState *dev;
 123     CPUState *env;
 124     int kernel_size;
 125     DriveInfo *dinfo;
 126     int i;
 127     target_phys_addr_t ddr_base = 0x90000000;
 128     ram_addr_t phys_lmb_bram;
 129     ram_addr_t phys_ram;
 130     ram_addr_t phys_flash;
 131     qemu_irq irq[32], *cpu_irq;
 132
 133     /* init CPUs */
 134     if (cpu_model == NULL) {
 135         cpu_model = "microblaze";
 136     }
 137     env = cpu_init(cpu_model);
 138
 139     env->pvr.regs[10] = 0x0c000000; /* spartan 3a dsp family.  */
 140     qemu_register_reset(main_cpu_reset, env);
 141
 142     /* Attach emulated BRAM through the LMB.  */
 143     phys_lmb_bram = qemu_ram_alloc(NULL, "petalogix_s3adsp1800.lmb_bram",
 144                                    LMB_BRAM_SIZE);
 145     cpu_register_physical_memory(0x00000000, LMB_BRAM_SIZE,
 146                                  phys_lmb_bram | IO_MEM_RAM);
 147
 148     phys_ram = qemu_ram_alloc(NULL, "petalogix_s3adsp1800.ram", ram_size);
 149     cpu_register_physical_memory(ddr_base, ram_size, phys_ram | IO_MEM_RAM);
 150
 151     phys_flash = qemu_ram_alloc(NULL, "petalogix_s3adsp1800.flash", FLASH_SIZE);
 152     dinfo = drive_get(IF_PFLASH, 0, 0);
 153     pflash_cfi01_register(0xa0000000, phys_flash,
 154                           dinfo ? dinfo->bdrv : NULL, (64 * 1024),
 155                           FLASH_SIZE >> 16,
 156                           1, 0x89, 0x18, 0x0000, 0x0, 1);
 157
 158     cpu_irq = microblaze_pic_init_cpu(env);
 159     dev = xilinx_intc_create(0x81800000, cpu_irq[0], 2);
 160     for (i = 0; i < 32; i++) {
 161         irq[i] = qdev_get_gpio_in(dev, i);
 162     }
 163
 164     sysbus_create_simple("xilinx,uartlite", 0x84000000, irq[3]);
 165     /* 2 timers at irq 2 @ 62 Mhz.  */
 166     xilinx_timer_create(0x83c00000, irq[0], 2, 62 * 1000000);
 167     xilinx_ethlite_create(&nd_table[0], 0x81000000, irq[1], 0, 0);
 168
 169     if (kernel_filename) {
 170         uint64_t entry, low, high;
 171         uint32_t base32;
 172         int big_endian = 0;
 173
 174 #ifdef TARGET_WORDS_BIGENDIAN
 175         big_endian = 1;
 176 #endif
 177
 178         /* Boots a kernel elf binary.  */
 179         kernel_size = load_elf(kernel_filename, NULL, NULL,
 180                                &entry, &low, &high,
 181                                big_endian, ELF_MACHINE, 0);
 182         base32 = entry;
 183         if (base32 == 0xc0000000) {
 184             kernel_size = load_elf(kernel_filename, translate_kernel_address,
 185                                    NULL, &entry, NULL, NULL,
 186                                    big_endian, ELF_MACHINE, 0);
 187         }
 188         /* Always boot into physical ram.  */
 189         boot_info.bootstrap_pc = ddr_base + (entry & 0x0fffffff);
 190
 191         /* If it wasn't an ELF image, try an u-boot image.  */
 192         if (kernel_size < 0) {
 193             target_phys_addr_t uentry, loadaddr;
 194
 195             kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0);
 196             boot_info.bootstrap_pc = uentry;
 197             high = (loadaddr + kernel_size + 3) & ~3;
 198         }
 199
 200         /* Not an ELF image nor an u-boot image, try a RAW image.  */
 201         if (kernel_size < 0) {
 202             kernel_size = load_image_targphys(kernel_filename, ddr_base,
 203                                               ram_size);
 204             boot_info.bootstrap_pc = ddr_base;
 205             high = (ddr_base + kernel_size + 3) & ~3;
 206         }
 207
 208         boot_info.cmdline = high + 4096;
 209         if (kernel_cmdline && strlen(kernel_cmdline)) {
 210             pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
 211         }
 212         /* Provide a device-tree.  */
 213         boot_info.fdt = boot_info.cmdline + 4096;
 214         petalogix_load_device_tree(boot_info.fdt, ram_size,
 215                                    0, 0,
 216                                    kernel_cmdline);
 217     }
 218 }
 219
 220 static QEMUMachine petalogix_s3adsp1800_machine = {
 221     .name = "petalogix-s3adsp1800",
 222     .desc = "PetaLogix linux refdesign for xilinx Spartan 3ADSP1800",
 223     .init = petalogix_s3adsp1800_init,
 224     .is_default = 1
 225 };
 226
 227 static void petalogix_s3adsp1800_machine_init(void)
 228 {
 229     qemu_register_machine(&petalogix_s3adsp1800_machine);
 230 }
 231
 232 machine_init(petalogix_s3adsp1800_machine_init);