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 #include "exec-memory.h"
  39
  40 #include "microblaze_pic_cpu.h"
  41
  42 #define LMB_BRAM_SIZE  (128 * 1024)
  43 #define FLASH_SIZE     (16 * 1024 * 1024)
  44
  45 static struct
  46 {
  47     uint32_t bootstrap_pc;
  48     uint32_t cmdline;
  49     uint32_t fdt;
  50 } boot_info;
  51
  52 static void main_cpu_reset(void *opaque)
  53 {
  54     CPUState *env = opaque;
  55
  56     cpu_reset(env);
  57     env->regs[5] = boot_info.cmdline;
  58     env->regs[7] = boot_info.fdt;
  59     env->sregs[SR_PC] = boot_info.bootstrap_pc;
  60 }
  61
  62 #define BINARY_DEVICE_TREE_FILE "petalogix-s3adsp1800.dtb"
  63 static int petalogix_load_device_tree(target_phys_addr_t addr,
  64                                       uint32_t ramsize,
  65                                       target_phys_addr_t initrd_base,
  66                                       target_phys_addr_t initrd_size,
  67                                       const char *kernel_cmdline)
  68 {
  69     char *path;
  70     int fdt_size;
  71 #ifdef CONFIG_FDT
  72     void *fdt;
  73     int r;
  74
  75     /* Try the local "mb.dtb" override.  */
  76     fdt = load_device_tree("mb.dtb", &fdt_size);
  77     if (!fdt) {
  78         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
  79         if (path) {
  80             fdt = load_device_tree(path, &fdt_size);
  81             g_free(path);
  82         }
  83         if (!fdt)
  84             return 0;
  85     }
  86
  87     r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
  88     if (r < 0)
  89         fprintf(stderr, "couldn't set /chosen/bootargs\n");
  90     cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
  91 #else
  92     /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
  93        to the kernel.  */
  94     fdt_size = load_image_targphys("mb.dtb", addr, 0x10000);
  95     if (fdt_size < 0) {
  96         path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
  97         if (path) {
  98             fdt_size = load_image_targphys(path, addr, 0x10000);
  99             g_free(path);
 100         }
 101     }
 102
 103     if (kernel_cmdline) {
 104         fprintf(stderr,
 105                 "Warning: missing libfdt, cannot pass cmdline to kernel!\n");
 106     }
 107 #endif
 108     return fdt_size;
 109 }
 110
 111 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
 112 {
 113     return addr - 0x30000000LL;
 114 }
 115
 116 static void
 117 petalogix_s3adsp1800_init(ram_addr_t ram_size,
 118                           const char *boot_device,
 119                           const char *kernel_filename,
 120                           const char *kernel_cmdline,
 121                           const char *initrd_filename, const char *cpu_model)
 122 {
 123     DeviceState *dev;
 124     CPUState *env;
 125     int kernel_size;
 126     DriveInfo *dinfo;
 127     int i;
 128     target_phys_addr_t ddr_base = 0x90000000;
 129     MemoryRegion *phys_lmb_bram = g_new(MemoryRegion, 1);
 130     MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
 131     qemu_irq irq[32], *cpu_irq;
 132     MemoryRegion *sysmem = get_system_memory();
 133
 134     /* init CPUs */
 135     if (cpu_model == NULL) {
 136         cpu_model = "microblaze";
 137     }
 138     env = cpu_init(cpu_model);
 139
 140     env->pvr.regs[10] = 0x0c000000; /* spartan 3a dsp family.  */
 141     qemu_register_reset(main_cpu_reset, env);
 142
 143     /* Attach emulated BRAM through the LMB.  */
 144     memory_region_init_ram(phys_lmb_bram,
 145                            "petalogix_s3adsp1800.lmb_bram", LMB_BRAM_SIZE);
 146     vmstate_register_ram_global(phys_lmb_bram);
 147     memory_region_add_subregion(sysmem, 0x00000000, phys_lmb_bram);
 148
 149     memory_region_init_ram(phys_ram, "petalogix_s3adsp1800.ram", ram_size);
 150     vmstate_register_ram_global(phys_ram);
 151     memory_region_add_subregion(sysmem, ddr_base, phys_ram);
 152
 153     dinfo = drive_get(IF_PFLASH, 0, 0);
 154     pflash_cfi01_register(0xa0000000,
 155                           NULL, "petalogix_s3adsp1800.flash", FLASH_SIZE,
 156                           dinfo ? dinfo->bdrv : NULL, (64 * 1024),
 157                           FLASH_SIZE >> 16,
 158                           1, 0x89, 0x18, 0x0000, 0x0, 1);
 159
 160     cpu_irq = microblaze_pic_init_cpu(env);
 161     dev = xilinx_intc_create(0x81800000, cpu_irq[0], 2);
 162     for (i = 0; i < 32; i++) {
 163         irq[i] = qdev_get_gpio_in(dev, i);
 164     }
 165
 166     sysbus_create_simple("xilinx,uartlite", 0x84000000, irq[3]);
 167     /* 2 timers at irq 2 @ 62 Mhz.  */
 168     xilinx_timer_create(0x83c00000, irq[0], 2, 62 * 1000000);
 169     xilinx_ethlite_create(&nd_table[0], 0x81000000, irq[1], 0, 0);
 170
 171     if (kernel_filename) {
 172         uint64_t entry, low, high;
 173         uint32_t base32;
 174         int big_endian = 0;
 175
 176 #ifdef TARGET_WORDS_BIGENDIAN
 177         big_endian = 1;
 178 #endif
 179
 180         /* Boots a kernel elf binary.  */
 181         kernel_size = load_elf(kernel_filename, NULL, NULL,
 182                                &entry, &low, &high,
 183                                big_endian, ELF_MACHINE, 0);
 184         base32 = entry;
 185         if (base32 == 0xc0000000) {
 186             kernel_size = load_elf(kernel_filename, translate_kernel_address,
 187                                    NULL, &entry, NULL, NULL,
 188                                    big_endian, ELF_MACHINE, 0);
 189         }
 190         /* Always boot into physical ram.  */
 191         boot_info.bootstrap_pc = ddr_base + (entry & 0x0fffffff);
 192
 193         /* If it wasn't an ELF image, try an u-boot image.  */
 194         if (kernel_size < 0) {
 195             target_phys_addr_t uentry, loadaddr;
 196
 197             kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0);
 198             boot_info.bootstrap_pc = uentry;
 199             high = (loadaddr + kernel_size + 3) & ~3;
 200         }
 201
 202         /* Not an ELF image nor an u-boot image, try a RAW image.  */
 203         if (kernel_size < 0) {
 204             kernel_size = load_image_targphys(kernel_filename, ddr_base,
 205                                               ram_size);
 206             boot_info.bootstrap_pc = ddr_base;
 207             high = (ddr_base + kernel_size + 3) & ~3;
 208         }
 209
 210         boot_info.cmdline = high + 4096;
 211         if (kernel_cmdline && strlen(kernel_cmdline)) {
 212             pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
 213         }
 214         /* Provide a device-tree.  */
 215         boot_info.fdt = boot_info.cmdline + 4096;
 216         petalogix_load_device_tree(boot_info.fdt, ram_size,
 217                                    0, 0,
 218                                    kernel_cmdline);
 219     }
 220 }
 221
 222 static QEMUMachine petalogix_s3adsp1800_machine = {
 223     .name = "petalogix-s3adsp1800",
 224     .desc = "PetaLogix linux refdesign for xilinx Spartan 3ADSP1800",
 225     .init = petalogix_s3adsp1800_init,
 226     .is_default = 1
 227 };
 228
 229 static void petalogix_s3adsp1800_machine_init(void)
 230 {
 231     qemu_register_machine(&petalogix_s3adsp1800_machine);
 232 }
 233
 234 machine_init(petalogix_s3adsp1800_machine_init);