qemu/hw/lm32/milkymist.c
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   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
  43typedef 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
  52static 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
  64static 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
  80static void
  81milkymist_init(MachineState *machine)
  82{
  83    const char *kernel_filename = machine->kernel_filename;
  84    const char *kernel_cmdline = machine->kernel_cmdline;
  85    const char *initrd_filename = machine->initrd_filename;
  86    LM32CPU *cpu;
  87    CPULM32State *env;
  88    int kernel_size;
  89    DriveInfo *dinfo;
  90    MemoryRegion *address_space_mem = get_system_memory();
  91    MemoryRegion *phys_sdram = g_new(MemoryRegion, 1);
  92    qemu_irq irq[32];
  93    int i;
  94    char *bios_filename;
  95    ResetInfo *reset_info;
  96
  97    /* memory map */
  98    hwaddr flash_base   = 0x00000000;
  99    size_t flash_sector_size        = 128 * 1024;
 100    size_t flash_size               = 32 * 1024 * 1024;
 101    hwaddr sdram_base   = 0x40000000;
 102    size_t sdram_size               = 128 * 1024 * 1024;
 103
 104    hwaddr initrd_base  = sdram_base + 0x1002000;
 105    hwaddr cmdline_base = sdram_base + 0x1000000;
 106    size_t initrd_max = sdram_size - 0x1002000;
 107
 108    reset_info = g_malloc0(sizeof(ResetInfo));
 109
 110    cpu = LM32_CPU(cpu_create(machine->cpu_type));
 111
 112    env = &cpu->env;
 113    reset_info->cpu = cpu;
 114
 115    cpu_lm32_set_phys_msb_ignore(env, 1);
 116
 117    memory_region_allocate_system_memory(phys_sdram, NULL, "milkymist.sdram",
 118                                         sdram_size);
 119    memory_region_add_subregion(address_space_mem, sdram_base, phys_sdram);
 120
 121    dinfo = drive_get(IF_PFLASH, 0, 0);
 122    /* Numonyx JS28F256J3F105 */
 123    pflash_cfi01_register(flash_base, NULL, "milkymist.flash", flash_size,
 124                          dinfo ? blk_by_legacy_dinfo(dinfo) : NULL,
 125                          flash_sector_size, flash_size / flash_sector_size,
 126                          2, 0x00, 0x89, 0x00, 0x1d, 1);
 127
 128    /* create irq lines */
 129    env->pic_state = lm32_pic_init(qemu_allocate_irq(cpu_irq_handler, cpu, 0));
 130    for (i = 0; i < 32; i++) {
 131        irq[i] = qdev_get_gpio_in(env->pic_state, i);
 132    }
 133
 134    /* load bios rom */
 135    if (bios_name == NULL) {
 136        bios_name = BIOS_FILENAME;
 137    }
 138    bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 139
 140    if (bios_filename) {
 141        load_image_targphys(bios_filename, BIOS_OFFSET, BIOS_SIZE);
 142    }
 143
 144    reset_info->bootstrap_pc = BIOS_OFFSET;
 145
 146    /* if no kernel is given no valid bios rom is a fatal error */
 147    if (!kernel_filename && !dinfo && !bios_filename && !qtest_enabled()) {
 148        fprintf(stderr, "qemu: could not load Milkymist One bios '%s'\n",
 149                bios_name);
 150        exit(1);
 151    }
 152    g_free(bios_filename);
 153
 154    milkymist_uart_create(0x60000000, irq[0], serial_hds[0]);
 155    milkymist_sysctl_create(0x60001000, irq[1], irq[2], irq[3],
 156            80000000, 0x10014d31, 0x0000041f, 0x00000001);
 157    milkymist_hpdmc_create(0x60002000);
 158    milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff);
 159    milkymist_memcard_create(0x60004000);
 160    milkymist_ac97_create(0x60005000, irq[4], irq[5], irq[6], irq[7]);
 161    milkymist_pfpu_create(0x60006000, irq[8]);
 162    if (machine->enable_graphics) {
 163        milkymist_tmu2_create(0x60007000, irq[9]);
 164    }
 165    milkymist_minimac2_create(0x60008000, 0x30000000, irq[10], irq[11]);
 166    milkymist_softusb_create(0x6000f000, irq[15],
 167            0x20000000, 0x1000, 0x20020000, 0x2000);
 168
 169    /* make sure juart isn't the first chardev */
 170    env->juart_state = lm32_juart_init(serial_hds[1]);
 171
 172    if (kernel_filename) {
 173        uint64_t entry;
 174
 175        /* Boots a kernel elf binary.  */
 176        kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
 177                               1, EM_LATTICEMICO32, 0, 0);
 178        reset_info->bootstrap_pc = entry;
 179
 180        if (kernel_size < 0) {
 181            kernel_size = load_image_targphys(kernel_filename, sdram_base,
 182                                              sdram_size);
 183            reset_info->bootstrap_pc = sdram_base;
 184        }
 185
 186        if (kernel_size < 0) {
 187            fprintf(stderr, "qemu: could not load kernel '%s'\n",
 188                    kernel_filename);
 189            exit(1);
 190        }
 191    }
 192
 193    if (kernel_cmdline && strlen(kernel_cmdline)) {
 194        pstrcpy_targphys("cmdline", cmdline_base, TARGET_PAGE_SIZE,
 195                kernel_cmdline);
 196        reset_info->cmdline_base = (uint32_t)cmdline_base;
 197    }
 198
 199    if (initrd_filename) {
 200        size_t initrd_size;
 201        initrd_size = load_image_targphys(initrd_filename, initrd_base,
 202                initrd_max);
 203        reset_info->initrd_base = (uint32_t)initrd_base;
 204        reset_info->initrd_size = (uint32_t)initrd_size;
 205    }
 206
 207    qemu_register_reset(main_cpu_reset, reset_info);
 208}
 209
 210static void milkymist_machine_init(MachineClass *mc)
 211{
 212    mc->desc = "Milkymist One";
 213    mc->init = milkymist_init;
 214    mc->is_default = 0;
 215    mc->default_cpu_type = LM32_CPU_TYPE_NAME("lm32-full");
 216}
 217
 218DEFINE_MACHINE("milkymist", milkymist_machine_init)
 219