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 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 "hw/sysbus.h"
  21 #include "hw/hw.h"
  22 #include "hw/block/flash.h"
  23 #include "sysemu/sysemu.h"
  24 #include "sysemu/qtest.h"
  25 #include "hw/devices.h"
  26 #include "hw/boards.h"
  27 #include "hw/loader.h"
  28 #include "elf.h"
  29 #include "sysemu/block-backend.h"
  30 #include "milkymist-hw.h"
  31 #include "lm32.h"
  32 #include "exec/address-spaces.h"
  33
  34 #define BIOS_FILENAME    "mmone-bios.bin"
  35 #define BIOS_OFFSET      0x00860000
  36 #define BIOS_SIZE        (512*1024)
  37 #define KERNEL_LOAD_ADDR 0x40000000
  38
  39 typedef struct {
  40     LM32CPU *cpu;
  41     hwaddr bootstrap_pc;
  42     hwaddr flash_base;
  43     hwaddr initrd_base;
  44     size_t initrd_size;
  45     hwaddr cmdline_base;
  46 } ResetInfo;
  47
  48 static void cpu_irq_handler(void *opaque, int irq, int level)
  49 {
  50     LM32CPU *cpu = opaque;
  51     CPUState *cs = CPU(cpu);
  52
  53     if (level) {
  54         cpu_interrupt(cs, CPU_INTERRUPT_HARD);
  55     } else {
  56         cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
  57     }
  58 }
  59
  60 static void main_cpu_reset(void *opaque)
  61 {
  62     ResetInfo *reset_info = opaque;
  63     CPULM32State *env = &reset_info->cpu->env;
  64
  65     cpu_reset(CPU(reset_info->cpu));
  66
  67     /* init defaults */
  68     env->pc = reset_info->bootstrap_pc;
  69     env->regs[R_R1] = reset_info->cmdline_base;
  70     env->regs[R_R2] = reset_info->initrd_base;
  71     env->regs[R_R3] = reset_info->initrd_base + reset_info->initrd_size;
  72     env->eba = reset_info->flash_base;
  73     env->deba = reset_info->flash_base;
  74 }
  75
  76 static void
  77 milkymist_init(MachineState *machine)
  78 {
  79     const char *cpu_model = machine->cpu_model;
  80     const char *kernel_filename = machine->kernel_filename;
  81     const char *kernel_cmdline = machine->kernel_cmdline;
  82     const char *initrd_filename = machine->initrd_filename;
  83     LM32CPU *cpu;
  84     CPULM32State *env;
  85     int kernel_size;
  86     DriveInfo *dinfo;
  87     MemoryRegion *address_space_mem = get_system_memory();
  88     MemoryRegion *phys_sdram = g_new(MemoryRegion, 1);
  89     qemu_irq irq[32], *cpu_irq;
  90     int i;
  91     char *bios_filename;
  92     ResetInfo *reset_info;
  93
  94     /* memory map */
  95     hwaddr flash_base   = 0x00000000;
  96     size_t flash_sector_size        = 128 * 1024;
  97     size_t flash_size               = 32 * 1024 * 1024;
  98     hwaddr sdram_base   = 0x40000000;
  99     size_t sdram_size               = 128 * 1024 * 1024;
 100
 101     hwaddr initrd_base  = sdram_base + 0x1002000;
 102     hwaddr cmdline_base = sdram_base + 0x1000000;
 103     size_t initrd_max = sdram_size - 0x1002000;
 104
 105     reset_info = g_malloc0(sizeof(ResetInfo));
 106
 107     if (cpu_model == NULL) {
 108         cpu_model = "lm32-full";
 109     }
 110     cpu = cpu_lm32_init(cpu_model);
 111     if (cpu == NULL) {
 112         fprintf(stderr, "qemu: unable to find CPU '%s'\n", cpu_model);
 113         exit(1);
 114     }
 115
 116     env = &cpu->env;
 117     reset_info->cpu = cpu;
 118
 119     cpu_lm32_set_phys_msb_ignore(env, 1);
 120
 121     memory_region_init_ram(phys_sdram, NULL, "milkymist.sdram", sdram_size,
 122                            &error_abort);
 123     vmstate_register_ram_global(phys_sdram);
 124     memory_region_add_subregion(address_space_mem, sdram_base, phys_sdram);
 125
 126     dinfo = drive_get(IF_PFLASH, 0, 0);
 127     /* Numonyx JS28F256J3F105 */
 128     pflash_cfi01_register(flash_base, NULL, "milkymist.flash", flash_size,
 129                           dinfo ? blk_by_legacy_dinfo(dinfo) : NULL,
 130                           flash_sector_size, flash_size / flash_sector_size,
 131                           2, 0x00, 0x89, 0x00, 0x1d, 1);
 132
 133     /* create irq lines */
 134     cpu_irq = qemu_allocate_irqs(cpu_irq_handler, cpu, 1);
 135     env->pic_state = lm32_pic_init(*cpu_irq);
 136     for (i = 0; i < 32; i++) {
 137         irq[i] = qdev_get_gpio_in(env->pic_state, i);
 138     }
 139
 140     /* load bios rom */
 141     if (bios_name == NULL) {
 142         bios_name = BIOS_FILENAME;
 143     }
 144     bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 145
 146     if (bios_filename) {
 147         load_image_targphys(bios_filename, BIOS_OFFSET, BIOS_SIZE);
 148     }
 149
 150     reset_info->bootstrap_pc = BIOS_OFFSET;
 151
 152     /* if no kernel is given no valid bios rom is a fatal error */
 153     if (!kernel_filename && !dinfo && !bios_filename && !qtest_enabled()) {
 154         fprintf(stderr, "qemu: could not load Milkymist One bios '%s'\n",
 155                 bios_name);
 156         exit(1);
 157     }
 158     g_free(bios_filename);
 159
 160     milkymist_uart_create(0x60000000, irq[0]);
 161     milkymist_sysctl_create(0x60001000, irq[1], irq[2], irq[3],
 162             80000000, 0x10014d31, 0x0000041f, 0x00000001);
 163     milkymist_hpdmc_create(0x60002000);
 164     milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff);
 165     milkymist_memcard_create(0x60004000);
 166     milkymist_ac97_create(0x60005000, irq[4], irq[5], irq[6], irq[7]);
 167     milkymist_pfpu_create(0x60006000, irq[8]);
 168     milkymist_tmu2_create(0x60007000, irq[9]);
 169     milkymist_minimac2_create(0x60008000, 0x30000000, irq[10], irq[11]);
 170     milkymist_softusb_create(0x6000f000, irq[15],
 171             0x20000000, 0x1000, 0x20020000, 0x2000);
 172
 173     /* make sure juart isn't the first chardev */
 174     env->juart_state = lm32_juart_init();
 175
 176     if (kernel_filename) {
 177         uint64_t entry;
 178
 179         /* Boots a kernel elf binary.  */
 180         kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
 181                                1, ELF_MACHINE, 0);
 182         reset_info->bootstrap_pc = entry;
 183
 184         if (kernel_size < 0) {
 185             kernel_size = load_image_targphys(kernel_filename, sdram_base,
 186                                               sdram_size);
 187             reset_info->bootstrap_pc = sdram_base;
 188         }
 189
 190         if (kernel_size < 0) {
 191             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 192                     kernel_filename);
 193             exit(1);
 194         }
 195     }
 196
 197     if (kernel_cmdline && strlen(kernel_cmdline)) {
 198         pstrcpy_targphys("cmdline", cmdline_base, TARGET_PAGE_SIZE,
 199                 kernel_cmdline);
 200         reset_info->cmdline_base = (uint32_t)cmdline_base;
 201     }
 202
 203     if (initrd_filename) {
 204         size_t initrd_size;
 205         initrd_size = load_image_targphys(initrd_filename, initrd_base,
 206                 initrd_max);
 207         reset_info->initrd_base = (uint32_t)initrd_base;
 208         reset_info->initrd_size = (uint32_t)initrd_size;
 209     }
 210
 211     qemu_register_reset(main_cpu_reset, reset_info);
 212 }
 213
 214 static QEMUMachine milkymist_machine = {
 215     .name = "milkymist",
 216     .desc = "Milkymist One",
 217     .init = milkymist_init,
 218     .is_default = 0,
 219 };
 220
 221 static void milkymist_machine_init(void)
 222 {
 223     qemu_register_machine(&milkymist_machine);
 224 }
 225
 226 machine_init(milkymist_machine_init);