hw/lm32/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 2.1 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 "qemu/osdep.h"
  21 #include "qemu/units.h"
  22 #include "qemu/error-report.h"
  23 #include "qemu-common.h"
  24 #include "qemu/datadir.h"
  25 #include "cpu.h"
  26 #include "hw/sysbus.h"
  27 #include "hw/irq.h"
  28 #include "hw/block/flash.h"
  29 #include "sysemu/sysemu.h"
  30 #include "sysemu/qtest.h"
  31 #include "sysemu/reset.h"
  32 #include "hw/boards.h"
  33 #include "hw/loader.h"
  34 #include "hw/qdev-properties.h"
  35 #include "elf.h"
  36 #include "milkymist-hw.h"
  37 #include "hw/display/milkymist_tmu2.h"
  38 #include "hw/sd/sd.h"
  39 #include "lm32.h"
  40 #include "exec/address-spaces.h"
  41 #include "qemu/cutils.h"
  42
  43 #define BIOS_FILENAME    "mmone-bios.bin"
  44 #define BIOS_OFFSET      0x00860000
  45 #define BIOS_SIZE        (512 * KiB)
  46 #define KERNEL_LOAD_ADDR 0x40000000
  47
  48 typedef struct {
  49     LM32CPU *cpu;
  50     hwaddr bootstrap_pc;
  51     hwaddr flash_base;
  52     hwaddr initrd_base;
  53     size_t initrd_size;
  54     hwaddr cmdline_base;
  55 } ResetInfo;
  56
  57 static void cpu_irq_handler(void *opaque, int irq, int level)
  58 {
  59     LM32CPU *cpu = opaque;
  60     CPUState *cs = CPU(cpu);
  61
  62     if (level) {
  63         cpu_interrupt(cs, CPU_INTERRUPT_HARD);
  64     } else {
  65         cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
  66     }
  67 }
  68
  69 static void main_cpu_reset(void *opaque)
  70 {
  71     ResetInfo *reset_info = opaque;
  72     CPULM32State *env = &reset_info->cpu->env;
  73
  74     cpu_reset(CPU(reset_info->cpu));
  75
  76     /* init defaults */
  77     env->pc = reset_info->bootstrap_pc;
  78     env->regs[R_R1] = reset_info->cmdline_base;
  79     env->regs[R_R2] = reset_info->initrd_base;
  80     env->regs[R_R3] = reset_info->initrd_base + reset_info->initrd_size;
  81     env->eba = reset_info->flash_base;
  82     env->deba = reset_info->flash_base;
  83 }
  84
  85 static DeviceState *milkymist_memcard_create(hwaddr base)
  86 {
  87     DeviceState *dev;
  88     DriveInfo *dinfo;
  89
  90     dev = qdev_new("milkymist-memcard");
  91     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
  92     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
  93
  94     dinfo = drive_get_next(IF_SD);
  95     if (dinfo) {
  96         DeviceState *card;
  97
  98         card = qdev_new(TYPE_SD_CARD);
  99         qdev_prop_set_drive_err(card, "drive", blk_by_legacy_dinfo(dinfo),
 100                                 &error_fatal);
 101         qdev_realize_and_unref(card, qdev_get_child_bus(dev, "sd-bus"),
 102                                &error_fatal);
 103     }
 104
 105     return dev;
 106 }
 107
 108 static void
 109 milkymist_init(MachineState *machine)
 110 {
 111     MachineClass *mc = MACHINE_GET_CLASS(machine);
 112     const char *bios_name = machine->firmware ?: BIOS_FILENAME;
 113     const char *kernel_filename = machine->kernel_filename;
 114     const char *kernel_cmdline = machine->kernel_cmdline;
 115     const char *initrd_filename = machine->initrd_filename;
 116     LM32CPU *cpu;
 117     CPULM32State *env;
 118     int kernel_size;
 119     DriveInfo *dinfo;
 120     MemoryRegion *address_space_mem = get_system_memory();
 121     qemu_irq irq[32];
 122     int i;
 123     char *bios_filename;
 124     ResetInfo *reset_info;
 125
 126     if (machine->ram_size != mc->default_ram_size) {
 127         char *sz = size_to_str(mc->default_ram_size);
 128         error_report("Invalid RAM size, should be %s", sz);
 129         g_free(sz);
 130         exit(EXIT_FAILURE);
 131     }
 132
 133     /* memory map */
 134     hwaddr flash_base   = 0x00000000;
 135     size_t flash_sector_size        = 128 * KiB;
 136     size_t flash_size               = 32 * MiB;
 137     hwaddr sdram_base   = 0x40000000;
 138
 139     hwaddr initrd_base  = sdram_base + 0x1002000;
 140     hwaddr cmdline_base = sdram_base + 0x1000000;
 141     size_t initrd_max = machine->ram_size - 0x1002000;
 142
 143     reset_info = g_malloc0(sizeof(ResetInfo));
 144
 145     cpu = LM32_CPU(cpu_create(machine->cpu_type));
 146
 147     env = &cpu->env;
 148     reset_info->cpu = cpu;
 149
 150     cpu_lm32_set_phys_msb_ignore(env, 1);
 151
 152     memory_region_add_subregion(address_space_mem, sdram_base, machine->ram);
 153
 154     dinfo = drive_get(IF_PFLASH, 0, 0);
 155     /* Numonyx JS28F256J3F105 */
 156     pflash_cfi01_register(flash_base, "milkymist.flash", flash_size,
 157                           dinfo ? blk_by_legacy_dinfo(dinfo) : NULL,
 158                           flash_sector_size, 2, 0x00, 0x89, 0x00, 0x1d, 1);
 159
 160     /* create irq lines */
 161     env->pic_state = lm32_pic_init(qemu_allocate_irq(cpu_irq_handler, cpu, 0));
 162     for (i = 0; i < 32; i++) {
 163         irq[i] = qdev_get_gpio_in(env->pic_state, i);
 164     }
 165
 166     /* load bios rom */
 167     bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 168
 169     if (bios_filename) {
 170         if (load_image_targphys(bios_filename, BIOS_OFFSET, BIOS_SIZE) < 0) {
 171             error_report("could not load bios '%s'", bios_filename);
 172             exit(1);
 173         }
 174     }
 175
 176     reset_info->bootstrap_pc = BIOS_OFFSET;
 177
 178     /* if no kernel is given no valid bios rom is a fatal error */
 179     if (!kernel_filename && !dinfo && !bios_filename && !qtest_enabled()) {
 180         error_report("could not load Milkymist One bios '%s'", bios_name);
 181         exit(1);
 182     }
 183     g_free(bios_filename);
 184
 185     milkymist_uart_create(0x60000000, irq[0], serial_hd(0));
 186     milkymist_sysctl_create(0x60001000, irq[1], irq[2], irq[3],
 187             80000000, 0x10014d31, 0x0000041f, 0x00000001);
 188     milkymist_hpdmc_create(0x60002000);
 189     milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff);
 190     milkymist_memcard_create(0x60004000);
 191     milkymist_ac97_create(0x60005000, irq[4], irq[5], irq[6], irq[7]);
 192     milkymist_pfpu_create(0x60006000, irq[8]);
 193     if (machine->enable_graphics) {
 194         milkymist_tmu2_create(0x60007000, irq[9]);
 195     }
 196     milkymist_minimac2_create(0x60008000, 0x30000000, irq[10], irq[11]);
 197     milkymist_softusb_create(0x6000f000, irq[15],
 198             0x20000000, 0x1000, 0x20020000, 0x2000);
 199
 200     /* make sure juart isn't the first chardev */
 201     env->juart_state = lm32_juart_init(serial_hd(1));
 202
 203     if (kernel_filename) {
 204         uint64_t entry;
 205
 206         /* Boots a kernel elf binary.  */
 207         kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
 208                                &entry, NULL, NULL, NULL,
 209                                1, EM_LATTICEMICO32, 0, 0);
 210         reset_info->bootstrap_pc = entry;
 211
 212         if (kernel_size < 0) {
 213             kernel_size = load_image_targphys(kernel_filename, sdram_base,
 214                                               machine->ram_size);
 215             reset_info->bootstrap_pc = sdram_base;
 216         }
 217
 218         if (kernel_size < 0) {
 219             error_report("could not load kernel '%s'", kernel_filename);
 220             exit(1);
 221         }
 222     }
 223
 224     if (kernel_cmdline && strlen(kernel_cmdline)) {
 225         pstrcpy_targphys("cmdline", cmdline_base, TARGET_PAGE_SIZE,
 226                 kernel_cmdline);
 227         reset_info->cmdline_base = (uint32_t)cmdline_base;
 228     }
 229
 230     if (initrd_filename) {
 231         size_t initrd_size;
 232         initrd_size = load_image_targphys(initrd_filename, initrd_base,
 233                 initrd_max);
 234         reset_info->initrd_base = (uint32_t)initrd_base;
 235         reset_info->initrd_size = (uint32_t)initrd_size;
 236     }
 237
 238     qemu_register_reset(main_cpu_reset, reset_info);
 239 }
 240
 241 static void milkymist_machine_init(MachineClass *mc)
 242 {
 243     mc->desc = "Milkymist One";
 244     mc->init = milkymist_init;
 245     mc->default_cpu_type = LM32_CPU_TYPE_NAME("lm32-full");
 246     mc->default_ram_size = 128 * MiB;
 247     mc->default_ram_id = "milkymist.sdram";
 248 }
 249
 250 DEFINE_MACHINE("milkymist", milkymist_machine_init)