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