hw/milkymist.c

   1 /*
   2  *  QEMU model for the Milkymist board.
   3  *
   4  *  Copyright (c) 2010 Michael Walle <michael@walle.cc>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "sysbus.h"
  21 #include "hw.h"
  22 #include "net.h"
  23 #include "flash.h"
  24 #include "sysemu.h"
  25 #include "devices.h"
  26 #include "boards.h"
  27 #include "loader.h"
  28 #include "elf.h"
  29 #include "blockdev.h"
  30 #include "milkymist-hw.h"
  31 #include "lm32.h"
  32
  33 #define BIOS_FILENAME    "mmone-bios.bin"
  34 #define BIOS_OFFSET      0x00860000
  35 #define BIOS_SIZE        (512*1024)
  36 #define KERNEL_LOAD_ADDR 0x40000000
  37
  38 typedef struct {
  39     CPUState *env;
  40     target_phys_addr_t bootstrap_pc;
  41     target_phys_addr_t flash_base;
  42     target_phys_addr_t initrd_base;
  43     size_t initrd_size;
  44     target_phys_addr_t cmdline_base;
  45 } ResetInfo;
  46
  47 static void cpu_irq_handler(void *opaque, int irq, int level)
  48 {
  49     CPUState *env = opaque;
  50
  51     if (level) {
  52         cpu_interrupt(env, CPU_INTERRUPT_HARD);
  53     } else {
  54         cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
  55     }
  56 }
  57
  58 static void main_cpu_reset(void *opaque)
  59 {
  60     ResetInfo *reset_info = opaque;
  61     CPUState *env = reset_info->env;
  62
  63     cpu_reset(env);
  64
  65     /* init defaults */
  66     env->pc = reset_info->bootstrap_pc;
  67     env->regs[R_R1] = reset_info->cmdline_base;
  68     env->regs[R_R2] = reset_info->initrd_base;
  69     env->regs[R_R3] = reset_info->initrd_base + reset_info->initrd_size;
  70     env->eba = reset_info->flash_base;
  71     env->deba = reset_info->flash_base;
  72 }
  73
  74 static void
  75 milkymist_init(ram_addr_t ram_size_not_used,
  76                           const char *boot_device,
  77                           const char *kernel_filename,
  78                           const char *kernel_cmdline,
  79                           const char *initrd_filename, const char *cpu_model)
  80 {
  81     CPUState *env;
  82     int kernel_size;
  83     DriveInfo *dinfo;
  84     ram_addr_t phys_sdram;
  85     ram_addr_t phys_flash;
  86     qemu_irq irq[32], *cpu_irq;
  87     int i;
  88     char *bios_filename;
  89     ResetInfo *reset_info;
  90
  91     /* memory map */
  92     target_phys_addr_t flash_base   = 0x00000000;
  93     size_t flash_sector_size        = 128 * 1024;
  94     size_t flash_size               = 32 * 1024 * 1024;
  95     target_phys_addr_t sdram_base   = 0x40000000;
  96     size_t sdram_size               = 128 * 1024 * 1024;
  97
  98     target_phys_addr_t initrd_base  = sdram_base + 0x1002000;
  99     target_phys_addr_t cmdline_base = sdram_base + 0x1000000;
 100     size_t initrd_max = sdram_size - 0x1002000;
 101
 102     reset_info = qemu_mallocz(sizeof(ResetInfo));
 103
 104     if (cpu_model == NULL) {
 105         cpu_model = "lm32-full";
 106     }
 107     env = cpu_init(cpu_model);
 108     reset_info->env = env;
 109
 110     cpu_lm32_set_phys_msb_ignore(env, 1);
 111
 112     phys_sdram = qemu_ram_alloc(NULL, "milkymist.sdram", sdram_size);
 113     cpu_register_physical_memory(sdram_base, sdram_size,
 114             phys_sdram | IO_MEM_RAM);
 115
 116     phys_flash = qemu_ram_alloc(NULL, "milkymist.flash", flash_size);
 117     dinfo = drive_get(IF_PFLASH, 0, 0);
 118     /* Numonyx JS28F256J3F105 */
 119     pflash_cfi01_register(flash_base, phys_flash,
 120                           dinfo ? dinfo->bdrv : NULL, flash_sector_size,
 121                           flash_size / flash_sector_size, 2,
 122                           0x00, 0x89, 0x00, 0x1d, 1);
 123
 124     /* create irq lines */
 125     cpu_irq = qemu_allocate_irqs(cpu_irq_handler, env, 1);
 126     env->pic_state = lm32_pic_init(*cpu_irq);
 127     for (i = 0; i < 32; i++) {
 128         irq[i] = qdev_get_gpio_in(env->pic_state, i);
 129     }
 130
 131     /* load bios rom */
 132     if (bios_name == NULL) {
 133         bios_name = BIOS_FILENAME;
 134     }
 135     bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 136
 137     if (bios_filename) {
 138         load_image_targphys(bios_filename, BIOS_OFFSET, BIOS_SIZE);
 139     }
 140
 141     reset_info->bootstrap_pc = BIOS_OFFSET;
 142
 143     /* if no kernel is given no valid bios rom is a fatal error */
 144     if (!kernel_filename && !dinfo && !bios_filename) {
 145         fprintf(stderr, "qemu: could not load Milkymist One bios '%s'\n",
 146                 bios_name);
 147         exit(1);
 148     }
 149
 150     milkymist_uart_create(0x60000000, irq[0], irq[1]);
 151     milkymist_sysctl_create(0x60001000, irq[2], irq[3], irq[4],
 152             80000000, 0x10014d31, 0x0000041f, 0x00000001);
 153     milkymist_hpdmc_create(0x60002000);
 154     milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff);
 155     milkymist_memcard_create(0x60004000);
 156     milkymist_ac97_create(0x60005000, irq[5], irq[6], irq[7], irq[8]);
 157     milkymist_pfpu_create(0x60006000, irq[9]);
 158     milkymist_tmu2_create(0x60007000, irq[10]);
 159     milkymist_minimac_create(0x60008000, irq[11], irq[12]);
 160     milkymist_softusb_create(0x6000f000, irq[17],
 161             0x20000000, 0x1000, 0x20020000, 0x2000);
 162
 163     /* make sure juart isn't the first chardev */
 164     env->juart_state = lm32_juart_init();
 165
 166     if (kernel_filename) {
 167         uint64_t entry;
 168
 169         /* Boots a kernel elf binary.  */
 170         kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
 171                                1, ELF_MACHINE, 0);
 172         reset_info->bootstrap_pc = entry;
 173
 174         if (kernel_size < 0) {
 175             kernel_size = load_image_targphys(kernel_filename, sdram_base,
 176                                               sdram_size);
 177             reset_info->bootstrap_pc = sdram_base;
 178         }
 179
 180         if (kernel_size < 0) {
 181             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 182                     kernel_filename);
 183             exit(1);
 184         }
 185     }
 186
 187     if (kernel_cmdline && strlen(kernel_cmdline)) {
 188         pstrcpy_targphys("cmdline", cmdline_base, TARGET_PAGE_SIZE,
 189                 kernel_cmdline);
 190         reset_info->cmdline_base = (uint32_t)cmdline_base;
 191     }
 192
 193     if (initrd_filename) {
 194         size_t initrd_size;
 195         initrd_size = load_image_targphys(initrd_filename, initrd_base,
 196                 initrd_max);
 197         reset_info->initrd_base = (uint32_t)initrd_base;
 198         reset_info->initrd_size = (uint32_t)initrd_size;
 199     }
 200
 201     qemu_register_reset(main_cpu_reset, reset_info);
 202 }
 203
 204 static QEMUMachine milkymist_machine = {
 205     .name = "milkymist",
 206     .desc = "Milkymist One",
 207     .init = milkymist_init,
 208     .is_default = 0
 209 };
 210
 211 static void milkymist_machine_init(void)
 212 {
 213     qemu_register_machine(&milkymist_machine);
 214 }
 215
 216 machine_init(milkymist_machine_init);