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