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