mips_r4k.c 8.09 KB
Newer Older
1 2 3 4 5 6 7 8 9
/*
 * QEMU/MIPS pseudo-board
 *
 * emulates a simple machine with ISA-like bus.
 * ISA IO space mapped to the 0x14000000 (PHYS) and
 * ISA memory at the 0x10000000 (PHYS, 16Mb in size).
 * All peripherial devices are attached to this "bus" with
 * the standard PC ISA addresses.
*/
pbrook's avatar
pbrook committed
10 11 12 13 14 15 16
#include "hw.h"
#include "mips.h"
#include "pc.h"
#include "isa.h"
#include "net.h"
#include "sysemu.h"
#include "boards.h"
bellard's avatar
bellard committed
17

ths's avatar
ths committed
18
#ifdef TARGET_WORDS_BIGENDIAN
bellard's avatar
bellard committed
19
#define BIOS_FILENAME "mips_bios.bin"
20 21 22
#else
#define BIOS_FILENAME "mipsel_bios.bin"
#endif
ths's avatar
ths committed
23

pbrook's avatar
pbrook committed
24
#define PHYS_TO_VIRT(x) ((x) | ~(target_ulong)0x7fffffff)
bellard's avatar
bellard committed
25

ths's avatar
ths committed
26
#define VIRT_TO_PHYS_ADDEND (-((int64_t)(int32_t)0x80000000))
bellard's avatar
bellard committed
27

ths's avatar
ths committed
28 29
#define MAX_IDE_BUS 2

pbrook's avatar
pbrook committed
30 31 32 33
static const int ide_iobase[2] = { 0x1f0, 0x170 };
static const int ide_iobase2[2] = { 0x3f6, 0x376 };
static const int ide_irq[2] = { 14, 15 };

ths's avatar
ths committed
34 35 36
static int serial_io[MAX_SERIAL_PORTS] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
static int serial_irq[MAX_SERIAL_PORTS] = { 4, 3, 4, 3 };

bellard's avatar
bellard committed
37 38
extern FILE *logfile;

39
static PITState *pit; /* PIT i8254 */
bellard's avatar
bellard committed
40

41
/*i8254 PIT is attached to the IRQ0 at PIC i8259 */
bellard's avatar
bellard committed
42

43 44 45 46 47 48 49
static struct _loaderparams {
    int ram_size;
    const char *kernel_filename;
    const char *kernel_cmdline;
    const char *initrd_filename;
} loaderparams;

50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77
static void mips_qemu_writel (void *opaque, target_phys_addr_t addr,
			      uint32_t val)
{
    if ((addr & 0xffff) == 0 && val == 42)
        qemu_system_reset_request ();
    else if ((addr & 0xffff) == 4 && val == 42)
        qemu_system_shutdown_request ();
}

static uint32_t mips_qemu_readl (void *opaque, target_phys_addr_t addr)
{
    return 0;
}

static CPUWriteMemoryFunc *mips_qemu_write[] = {
    &mips_qemu_writel,
    &mips_qemu_writel,
    &mips_qemu_writel,
};

static CPUReadMemoryFunc *mips_qemu_read[] = {
    &mips_qemu_readl,
    &mips_qemu_readl,
    &mips_qemu_readl,
};

static int mips_qemu_iomemtype = 0;

78
static void load_kernel (CPUState *env)
79
{
ths's avatar
ths committed
80
    int64_t entry, kernel_low, kernel_high;
81
    long kernel_size, initrd_size;
ths's avatar
ths committed
82
    ram_addr_t initrd_offset;
83

84
    kernel_size = load_elf(loaderparams.kernel_filename, VIRT_TO_PHYS_ADDEND,
ths's avatar
ths committed
85
                           &entry, &kernel_low, &kernel_high);
86 87
    if (kernel_size >= 0) {
        if ((entry & ~0x7fffffffULL) == 0x80000000)
ths's avatar
ths committed
88
            entry = (int32_t)entry;
89
        env->PC[env->current_tc] = entry;
90
    } else {
91
        fprintf(stderr, "qemu: could not load kernel '%s'\n",
92
                loaderparams.kernel_filename);
93
        exit(1);
94 95 96 97
    }

    /* load initrd */
    initrd_size = 0;
ths's avatar
ths committed
98
    initrd_offset = 0;
99 100
    if (loaderparams.initrd_filename) {
        initrd_size = get_image_size (loaderparams.initrd_filename);
ths's avatar
ths committed
101 102 103 104 105
        if (initrd_size > 0) {
            initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
            if (initrd_offset + initrd_size > ram_size) {
                fprintf(stderr,
                        "qemu: memory too small for initial ram disk '%s'\n",
106
                        loaderparams.initrd_filename);
ths's avatar
ths committed
107 108
                exit(1);
            }
109
            initrd_size = load_image(loaderparams.initrd_filename,
ths's avatar
ths committed
110 111
                                     phys_ram_base + initrd_offset);
        }
112 113
        if (initrd_size == (target_ulong) -1) {
            fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
114
                    loaderparams.initrd_filename);
115 116 117 118 119 120 121 122
            exit(1);
        }
    }

    /* Store command line.  */
    if (initrd_size > 0) {
        int ret;
        ret = sprintf(phys_ram_base + (16 << 20) - 256,
ths's avatar
ths committed
123
                      "rd_start=0x" TARGET_FMT_lx " rd_size=%li ",
ths's avatar
ths committed
124
                      PHYS_TO_VIRT((uint32_t)initrd_offset),
125
                      initrd_size);
126 127
        strcpy (phys_ram_base + (16 << 20) - 256 + ret,
                loaderparams.kernel_cmdline);
128 129
    }
    else {
130 131
        strcpy (phys_ram_base + (16 << 20) - 256,
                loaderparams.kernel_cmdline);
132 133
    }

ths's avatar
ths committed
134 135
    *(int32_t *)(phys_ram_base + (16 << 20) - 260) = tswap32 (0x12345678);
    *(int32_t *)(phys_ram_base + (16 << 20) - 264) = tswap32 (ram_size);
136 137 138 139 140 141 142
}

static void main_cpu_reset(void *opaque)
{
    CPUState *env = opaque;
    cpu_reset(env);

143 144
    if (loaderparams.kernel_filename)
        load_kernel (env);
145
}
bellard's avatar
bellard committed
146

147
static
148 149
void mips_r4k_init (int ram_size, int vga_ram_size,
                    const char *boot_device, DisplayState *ds,
bellard's avatar
bellard committed
150
                    const char *kernel_filename, const char *kernel_cmdline,
151
                    const char *initrd_filename, const char *cpu_model)
bellard's avatar
bellard committed
152 153 154
{
    char buf[1024];
    unsigned long bios_offset;
155
    int bios_size;
bellard's avatar
bellard committed
156
    CPUState *env;
ths's avatar
ths committed
157
    RTCState *rtc_state;
pbrook's avatar
pbrook committed
158
    int i;
pbrook's avatar
pbrook committed
159
    qemu_irq *i8259;
ths's avatar
ths committed
160 161
    int index;
    BlockDriverState *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
bellard's avatar
bellard committed
162

163 164
    /* init CPUs */
    if (cpu_model == NULL) {
ths's avatar
ths committed
165
#ifdef TARGET_MIPS64
166 167
        cpu_model = "R4000";
#else
168
        cpu_model = "24Kf";
169 170
#endif
    }
171 172 173 174 175
    env = cpu_init(cpu_model);
    if (!env) {
        fprintf(stderr, "Unable to find CPU definition\n");
        exit(1);
    }
bellard's avatar
bellard committed
176
    register_savevm("cpu", 0, 3, cpu_save, cpu_load, env);
177
    qemu_register_reset(main_cpu_reset, env);
bellard's avatar
bellard committed
178

bellard's avatar
bellard committed
179 180
    /* allocate RAM */
    cpu_register_physical_memory(0, ram_size, IO_MEM_RAM);
bellard's avatar
bellard committed
181

182 183
    if (!mips_qemu_iomemtype) {
        mips_qemu_iomemtype = cpu_register_io_memory(0, mips_qemu_read,
184
                                                     mips_qemu_write, NULL);
185 186 187
    }
    cpu_register_physical_memory(0x1fbf0000, 0x10000, mips_qemu_iomemtype);

bellard's avatar
bellard committed
188 189 190 191
    /* Try to load a BIOS image. If this fails, we continue regardless,
       but initialize the hardware ourselves. When a kernel gets
       preloaded we also initialize the hardware, since the BIOS wasn't
       run. */
bellard's avatar
bellard committed
192
    bios_offset = ram_size + vga_ram_size;
193 194 195
    if (bios_name == NULL)
        bios_name = BIOS_FILENAME;
    snprintf(buf, sizeof(buf), "%s/%s", bios_dir, bios_name);
196
    bios_size = load_image(buf, phys_ram_base + bios_offset);
ths's avatar
ths committed
197
    if ((bios_size > 0) && (bios_size <= BIOS_SIZE)) {
ths's avatar
ths committed
198
	cpu_register_physical_memory(0x1fc00000,
bellard's avatar
bellard committed
199 200 201 202 203
				     BIOS_SIZE, bios_offset | IO_MEM_ROM);
    } else {
	/* not fatal */
        fprintf(stderr, "qemu: Warning, could not load MIPS bios '%s'\n",
		buf);
bellard's avatar
bellard committed
204
    }
bellard's avatar
bellard committed
205 206

    if (kernel_filename) {
207 208 209 210 211
        loaderparams.ram_size = ram_size;
        loaderparams.kernel_filename = kernel_filename;
        loaderparams.kernel_cmdline = kernel_cmdline;
        loaderparams.initrd_filename = initrd_filename;
        load_kernel (env);
bellard's avatar
bellard committed
212 213
    }

214
    /* Init CPU internal devices */
pbrook's avatar
pbrook committed
215
    cpu_mips_irq_init_cpu(env);
bellard's avatar
bellard committed
216
    cpu_mips_clock_init(env);
bellard's avatar
bellard committed
217 218
    cpu_mips_irqctrl_init();

pbrook's avatar
pbrook committed
219 220 221 222
    /* The PIC is attached to the MIPS CPU INT0 pin */
    i8259 = i8259_init(env->irq[2]);

    rtc_state = rtc_init(0x70, i8259[8]);
ths's avatar
ths committed
223

bellard's avatar
bellard committed
224
    /* Register 64 KB of ISA IO space at 0x14000000 */
pbrook's avatar
pbrook committed
225
    isa_mmio_init(0x14000000, 0x00010000);
bellard's avatar
bellard committed
226 227
    isa_mem_base = 0x10000000;

pbrook's avatar
pbrook committed
228
    pit = pit_init(0x40, i8259[0]);
ths's avatar
ths committed
229

ths's avatar
ths committed
230 231
    for(i = 0; i < MAX_SERIAL_PORTS; i++) {
        if (serial_hds[i]) {
pbrook's avatar
pbrook committed
232
            serial_init(serial_io[i], i8259[serial_irq[i]], serial_hds[i]);
ths's avatar
ths committed
233 234 235
        }
    }

236
    isa_vga_init(ds, phys_ram_base + ram_size, ram_size,
bellard's avatar
bellard committed
237
                 vga_ram_size);
bellard's avatar
bellard committed
238

239 240 241
    if (nd_table[0].vlan) {
        if (nd_table[0].model == NULL
            || strcmp(nd_table[0].model, "ne2k_isa") == 0) {
pbrook's avatar
pbrook committed
242
            isa_ne2000_init(0x300, i8259[9], &nd_table[0]);
243 244 245
        } else if (strcmp(nd_table[0].model, "?") == 0) {
            fprintf(stderr, "qemu: Supported NICs: ne2k_isa\n");
            exit (1);
246 247 248 249 250
        } else {
            fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd_table[0].model);
            exit (1);
        }
    }
pbrook's avatar
pbrook committed
251

ths's avatar
ths committed
252 253 254 255 256 257 258 259 260 261 262 263 264 265
    if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
        fprintf(stderr, "qemu: too many IDE bus\n");
        exit(1);
    }

    for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
        index = drive_get_index(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
        if (index != -1)
            hd[i] = drives_table[index].bdrv;
        else
            hd[i] = NULL;
    }

    for(i = 0; i < MAX_IDE_BUS; i++)
pbrook's avatar
pbrook committed
266
        isa_ide_init(ide_iobase[i], ide_iobase2[i], i8259[ide_irq[i]],
ths's avatar
ths committed
267 268
                     hd[MAX_IDE_DEVS * i],
		     hd[MAX_IDE_DEVS * i + 1]);
269

pbrook's avatar
pbrook committed
270
    i8042_init(i8259[1], i8259[12], 0x60);
271
    ds1225y_init(0x9000, "nvram");
bellard's avatar
bellard committed
272 273 274 275 276 277 278
}

QEMUMachine mips_machine = {
    "mips",
    "mips r4k platform",
    mips_r4k_init,
};