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 "flash.h"
  23 #include "sysemu/sysemu.h"
  24 #include "devices.h"
  25 #include "boards.h"
  26 #include "loader.h"
  27 #include "elf.h"
  28 #include "sysemu/blockdev.h"
  29 #include "milkymist-hw.h"
  30 #include "lm32.h"
  31 #include "exec/address-spaces.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     LM32CPU *cpu;
  40     hwaddr bootstrap_pc;
  41     hwaddr flash_base;
  42     hwaddr initrd_base;
  43     size_t initrd_size;
  44     hwaddr cmdline_base;
  45 } ResetInfo;
  46
  47 static void cpu_irq_handler(void *opaque, int irq, int level)
  48 {
  49     CPULM32State *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     CPULM32State *env = &reset_info->cpu->env;
  62
  63     cpu_reset(CPU(reset_info->cpu));
  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(QEMUMachineInitArgs *args)
  76 {
  77     const char *cpu_model = args->cpu_model;
  78     const char *kernel_filename = args->kernel_filename;
  79     const char *kernel_cmdline = args->kernel_cmdline;
  80     const char *initrd_filename = args->initrd_filename;
  81     LM32CPU *cpu;
  82     CPULM32State *env;
  83     int kernel_size;
  84     DriveInfo *dinfo;
  85     MemoryRegion *address_space_mem = get_system_memory();
  86     MemoryRegion *phys_sdram = g_new(MemoryRegion, 1);
  87     qemu_irq irq[32], *cpu_irq;
  88     int i;
  89     char *bios_filename;
  90     ResetInfo *reset_info;
  91
  92     /* memory map */
  93     hwaddr flash_base   = 0x00000000;
  94     size_t flash_sector_size        = 128 * 1024;
  95     size_t flash_size               = 32 * 1024 * 1024;
  96     hwaddr sdram_base   = 0x40000000;
  97     size_t sdram_size               = 128 * 1024 * 1024;
  98
  99     hwaddr initrd_base  = sdram_base + 0x1002000;
 100     hwaddr cmdline_base = sdram_base + 0x1000000;
 101     size_t initrd_max = sdram_size - 0x1002000;
 102
 103     reset_info = g_malloc0(sizeof(ResetInfo));
 104
 105     if (cpu_model == NULL) {
 106         cpu_model = "lm32-full";
 107     }
 108     cpu = cpu_lm32_init(cpu_model);
 109     env = &cpu->env;
 110     reset_info->cpu = cpu;
 111
 112     cpu_lm32_set_phys_msb_ignore(env, 1);
 113
 114     memory_region_init_ram(phys_sdram, "milkymist.sdram", sdram_size);
 115     vmstate_register_ram_global(phys_sdram);
 116     memory_region_add_subregion(address_space_mem, sdram_base, phys_sdram);
 117
 118     dinfo = drive_get(IF_PFLASH, 0, 0);
 119     /* Numonyx JS28F256J3F105 */
 120     pflash_cfi01_register(flash_base, NULL, "milkymist.flash", flash_size,
 121                           dinfo ? dinfo->bdrv : NULL, flash_sector_size,
 122                           flash_size / flash_sector_size, 2,
 123                           0x00, 0x89, 0x00, 0x1d, 1);
 124
 125     /* create irq lines */
 126     cpu_irq = qemu_allocate_irqs(cpu_irq_handler, env, 1);
 127     env->pic_state = lm32_pic_init(*cpu_irq);
 128     for (i = 0; i < 32; i++) {
 129         irq[i] = qdev_get_gpio_in(env->pic_state, i);
 130     }
 131
 132     /* load bios rom */
 133     if (bios_name == NULL) {
 134         bios_name = BIOS_FILENAME;
 135     }
 136     bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 137
 138     if (bios_filename) {
 139         load_image_targphys(bios_filename, BIOS_OFFSET, BIOS_SIZE);
 140     }
 141
 142     reset_info->bootstrap_pc = BIOS_OFFSET;
 143
 144     /* if no kernel is given no valid bios rom is a fatal error */
 145     if (!kernel_filename && !dinfo && !bios_filename) {
 146         fprintf(stderr, "qemu: could not load Milkymist One bios '%s'\n",
 147                 bios_name);
 148         exit(1);
 149     }
 150
 151     milkymist_uart_create(0x60000000, irq[0]);
 152     milkymist_sysctl_create(0x60001000, irq[1], irq[2], irq[3],
 153             80000000, 0x10014d31, 0x0000041f, 0x00000001);
 154     milkymist_hpdmc_create(0x60002000);
 155     milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff);
 156     milkymist_memcard_create(0x60004000);
 157     milkymist_ac97_create(0x60005000, irq[4], irq[5], irq[6], irq[7]);
 158     milkymist_pfpu_create(0x60006000, irq[8]);
 159     milkymist_tmu2_create(0x60007000, irq[9]);
 160     milkymist_minimac2_create(0x60008000, 0x30000000, irq[10], irq[11]);
 161     milkymist_softusb_create(0x6000f000, irq[15],
 162             0x20000000, 0x1000, 0x20020000, 0x2000);
 163
 164     /* make sure juart isn't the first chardev */
 165     env->juart_state = lm32_juart_init();
 166
 167     if (kernel_filename) {
 168         uint64_t entry;
 169
 170         /* Boots a kernel elf binary.  */
 171         kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
 172                                1, ELF_MACHINE, 0);
 173         reset_info->bootstrap_pc = entry;
 174
 175         if (kernel_size < 0) {
 176             kernel_size = load_image_targphys(kernel_filename, sdram_base,
 177                                               sdram_size);
 178             reset_info->bootstrap_pc = sdram_base;
 179         }
 180
 181         if (kernel_size < 0) {
 182             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 183                     kernel_filename);
 184             exit(1);
 185         }
 186     }
 187
 188     if (kernel_cmdline && strlen(kernel_cmdline)) {
 189         pstrcpy_targphys("cmdline", cmdline_base, TARGET_PAGE_SIZE,
 190                 kernel_cmdline);
 191         reset_info->cmdline_base = (uint32_t)cmdline_base;
 192     }
 193
 194     if (initrd_filename) {
 195         size_t initrd_size;
 196         initrd_size = load_image_targphys(initrd_filename, initrd_base,
 197                 initrd_max);
 198         reset_info->initrd_base = (uint32_t)initrd_base;
 199         reset_info->initrd_size = (uint32_t)initrd_size;
 200     }
 201
 202     qemu_register_reset(main_cpu_reset, reset_info);
 203 }
 204
 205 static QEMUMachine milkymist_machine = {
 206     .name = "milkymist",
 207     .desc = "Milkymist One",
 208     .init = milkymist_init,
 209     .is_default = 0,
 210     DEFAULT_MACHINE_OPTIONS,
 211 };
 212
 213 static void milkymist_machine_init(void)
 214 {
 215     qemu_register_machine(&milkymist_machine);
 216 }
 217
 218 machine_init(milkymist_machine_init);