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