qemu/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 "qemu/osdep.h"
  21 #include "qemu-common.h"
  22 #include "cpu.h"
  23 #include "hw/sysbus.h"
  24 #include "hw/hw.h"
  25 #include "hw/block/flash.h"
  26 #include "sysemu/sysemu.h"
  27 #include "sysemu/qtest.h"
  28 #include "hw/devices.h"
  29 #include "hw/boards.h"
  30 #include "hw/loader.h"
  31 #include "elf.h"
  32 #include "sysemu/block-backend.h"
  33 #include "milkymist-hw.h"
  34 #include "lm32.h"
  35 #include "exec/address-spaces.h"
  36 #include "qemu/cutils.h"
  37
  38 #define BIOS_FILENAME    "mmone-bios.bin"
  39 #define BIOS_OFFSET      0x00860000
  40 #define BIOS_SIZE        (512*1024)
  41 #define KERNEL_LOAD_ADDR 0x40000000
  42
  43 typedef struct {
  44     LM32CPU *cpu;
  45     hwaddr bootstrap_pc;
  46     hwaddr flash_base;
  47     hwaddr initrd_base;
  48     size_t initrd_size;
  49     hwaddr cmdline_base;
  50 } ResetInfo;
  51
  52 static void cpu_irq_handler(void *opaque, int irq, int level)
  53 {
  54     LM32CPU *cpu = opaque;
  55     CPUState *cs = CPU(cpu);
  56
  57     if (level) {
  58         cpu_interrupt(cs, CPU_INTERRUPT_HARD);
  59     } else {
  60         cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
  61     }
  62 }
  63
  64 static void main_cpu_reset(void *opaque)
  65 {
  66     ResetInfo *reset_info = opaque;
  67     CPULM32State *env = &reset_info->cpu->env;
  68
  69     cpu_reset(CPU(reset_info->cpu));
  70
  71     /* init defaults */
  72     env->pc = reset_info->bootstrap_pc;
  73     env->regs[R_R1] = reset_info->cmdline_base;
  74     env->regs[R_R2] = reset_info->initrd_base;
  75     env->regs[R_R3] = reset_info->initrd_base + reset_info->initrd_size;
  76     env->eba = reset_info->flash_base;
  77     env->deba = reset_info->flash_base;
  78 }
  79
  80 static void
  81 milkymist_init(MachineState *machine)
  82 {
  83     const char *cpu_model = machine->cpu_model;
  84     const char *kernel_filename = machine->kernel_filename;
  85     const char *kernel_cmdline = machine->kernel_cmdline;
  86     const char *initrd_filename = machine->initrd_filename;
  87     LM32CPU *cpu;
  88     CPULM32State *env;
  89     int kernel_size;
  90     DriveInfo *dinfo;
  91     MemoryRegion *address_space_mem = get_system_memory();
  92     MemoryRegion *phys_sdram = g_new(MemoryRegion, 1);
  93     qemu_irq irq[32];
  94     int i;
  95     char *bios_filename;
  96     ResetInfo *reset_info;
  97
  98     /* memory map */
  99     hwaddr flash_base   = 0x00000000;
 100     size_t flash_sector_size        = 128 * 1024;
 101     size_t flash_size               = 32 * 1024 * 1024;
 102     hwaddr sdram_base   = 0x40000000;
 103     size_t sdram_size               = 128 * 1024 * 1024;
 104
 105     hwaddr initrd_base  = sdram_base + 0x1002000;
 106     hwaddr cmdline_base = sdram_base + 0x1000000;
 107     size_t initrd_max = sdram_size - 0x1002000;
 108
 109     reset_info = g_malloc0(sizeof(ResetInfo));
 110
 111     if (cpu_model == NULL) {
 112         cpu_model = "lm32-full";
 113     }
 114     cpu = cpu_lm32_init(cpu_model);
 115     if (cpu == NULL) {
 116         fprintf(stderr, "qemu: unable to find CPU '%s'\n", cpu_model);
 117         exit(1);
 118     }
 119
 120     env = &cpu->env;
 121     reset_info->cpu = cpu;
 122
 123     cpu_lm32_set_phys_msb_ignore(env, 1);
 124
 125     memory_region_allocate_system_memory(phys_sdram, NULL, "milkymist.sdram",
 126                                          sdram_size);
 127     memory_region_add_subregion(address_space_mem, sdram_base, phys_sdram);
 128
 129     dinfo = drive_get(IF_PFLASH, 0, 0);
 130     /* Numonyx JS28F256J3F105 */
 131     pflash_cfi01_register(flash_base, NULL, "milkymist.flash", flash_size,
 132                           dinfo ? blk_by_legacy_dinfo(dinfo) : NULL,
 133                           flash_sector_size, flash_size / flash_sector_size,
 134                           2, 0x00, 0x89, 0x00, 0x1d, 1);
 135
 136     /* create irq lines */
 137     env->pic_state = lm32_pic_init(qemu_allocate_irq(cpu_irq_handler, cpu, 0));
 138     for (i = 0; i < 32; i++) {
 139         irq[i] = qdev_get_gpio_in(env->pic_state, i);
 140     }
 141
 142     /* load bios rom */
 143     if (bios_name == NULL) {
 144         bios_name = BIOS_FILENAME;
 145     }
 146     bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 147
 148     if (bios_filename) {
 149         load_image_targphys(bios_filename, BIOS_OFFSET, BIOS_SIZE);
 150     }
 151
 152     reset_info->bootstrap_pc = BIOS_OFFSET;
 153
 154     /* if no kernel is given no valid bios rom is a fatal error */
 155     if (!kernel_filename && !dinfo && !bios_filename && !qtest_enabled()) {
 156         fprintf(stderr, "qemu: could not load Milkymist One bios '%s'\n",
 157                 bios_name);
 158         exit(1);
 159     }
 160     g_free(bios_filename);
 161
 162     milkymist_uart_create(0x60000000, irq[0]);
 163     milkymist_sysctl_create(0x60001000, irq[1], irq[2], irq[3],
 164             80000000, 0x10014d31, 0x0000041f, 0x00000001);
 165     milkymist_hpdmc_create(0x60002000);
 166     milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff);
 167     milkymist_memcard_create(0x60004000);
 168     milkymist_ac97_create(0x60005000, irq[4], irq[5], irq[6], irq[7]);
 169     milkymist_pfpu_create(0x60006000, irq[8]);
 170     milkymist_tmu2_create(0x60007000, irq[9]);
 171     milkymist_minimac2_create(0x60008000, 0x30000000, irq[10], irq[11]);
 172     milkymist_softusb_create(0x6000f000, irq[15],
 173             0x20000000, 0x1000, 0x20020000, 0x2000);
 174
 175     /* make sure juart isn't the first chardev */
 176     env->juart_state = lm32_juart_init();
 177
 178     if (kernel_filename) {
 179         uint64_t entry;
 180
 181         /* Boots a kernel elf binary.  */
 182         kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
 183                                1, EM_LATTICEMICO32, 0, 0);
 184         reset_info->bootstrap_pc = entry;
 185
 186         if (kernel_size < 0) {
 187             kernel_size = load_image_targphys(kernel_filename, sdram_base,
 188                                               sdram_size);
 189             reset_info->bootstrap_pc = sdram_base;
 190         }
 191
 192         if (kernel_size < 0) {
 193             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 194                     kernel_filename);
 195             exit(1);
 196         }
 197     }
 198
 199     if (kernel_cmdline && strlen(kernel_cmdline)) {
 200         pstrcpy_targphys("cmdline", cmdline_base, TARGET_PAGE_SIZE,
 201                 kernel_cmdline);
 202         reset_info->cmdline_base = (uint32_t)cmdline_base;
 203     }
 204
 205     if (initrd_filename) {
 206         size_t initrd_size;
 207         initrd_size = load_image_targphys(initrd_filename, initrd_base,
 208                 initrd_max);
 209         reset_info->initrd_base = (uint32_t)initrd_base;
 210         reset_info->initrd_size = (uint32_t)initrd_size;
 211     }
 212
 213     qemu_register_reset(main_cpu_reset, reset_info);
 214 }
 215
 216 static void milkymist_machine_init(MachineClass *mc)
 217 {
 218     mc->desc = "Milkymist One";
 219     mc->init = milkymist_init;
 220     mc->is_default = 0;
 221 }
 222
 223 DEFINE_MACHINE("milkymist", milkymist_machine_init)