summaryrefslogtreecommitdiff
path: root/hw/mips/mips_fulong2e.c
blob: e1551aabe279ad6ceb67813068076018d40ae142 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
/*
 * QEMU fulong 2e mini pc support
 *
 * Copyright (c) 2008 yajin (yajin@vm-kernel.org)
 * Copyright (c) 2009 chenming (chenming@rdc.faw.com.cn)
 * Copyright (c) 2010 Huacai Chen (zltjiangshi@gmail.com)
 * This code is licensed under the GNU GPL v2.
 *
 * Contributions after 2012-01-13 are licensed under the terms of the
 * GNU GPL, version 2 or (at your option) any later version.
 */

/*
 * Fulong 2e mini pc is based on ICT/ST Loongson 2e CPU (MIPS III like, 800MHz)
 * http://www.linux-mips.org/wiki/Fulong
 *
 * Loongson 2e user manual:
 * http://www.loongsondeveloper.com/doc/Loongson2EUserGuide.pdf
 */

#include "hw/hw.h"
#include "hw/i386/pc.h"
#include "hw/char/serial.h"
#include "hw/block/fdc.h"
#include "net/net.h"
#include "hw/boards.h"
#include "hw/i2c/smbus.h"
#include "block/block.h"
#include "hw/block/flash.h"
#include "hw/mips/mips.h"
#include "hw/mips/cpudevs.h"
#include "hw/pci/pci.h"
#include "sysemu/char.h"
#include "sysemu/sysemu.h"
#include "audio/audio.h"
#include "qemu/log.h"
#include "hw/loader.h"
#include "hw/mips/bios.h"
#include "hw/ide.h"
#include "elf.h"
#include "hw/isa/vt82c686.h"
#include "hw/timer/mc146818rtc.h"
#include "hw/timer/i8254.h"
#include "sysemu/blockdev.h"
#include "exec/address-spaces.h"
#include "sysemu/qtest.h"
#include "qemu/error-report.h"

#define DEBUG_FULONG2E_INIT

#define ENVP_ADDR       0x80002000l
#define ENVP_NB_ENTRIES	 	16
#define ENVP_ENTRY_SIZE	 	256

#define MAX_IDE_BUS 2

/*
 * PMON is not part of qemu and released with BSD license, anyone
 * who want to build a pmon binary please first git-clone the source
 * from the git repository at:
 * http://www.loongson.cn/support/git/pmon
 * Then follow the "Compile Guide" available at:
 * http://dev.lemote.com/code/pmon
 *
 * Notes:
 * 1, don't use the source at http://dev.lemote.com/http_git/pmon.git
 * 2, use "Bonito2edev" to replace "dir_corresponding_to_your_target_hardware"
 * in the "Compile Guide".
 */
#define FULONG_BIOSNAME "pmon_fulong2e.bin"

/* PCI SLOT in fulong 2e */
#define FULONG2E_VIA_SLOT        5
#define FULONG2E_ATI_SLOT        6
#define FULONG2E_RTL8139_SLOT    7

static ISADevice *pit;

static struct _loaderparams {
    int ram_size;
    const char *kernel_filename;
    const char *kernel_cmdline;
    const char *initrd_filename;
} loaderparams;

static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t* prom_buf, int index,
                                        const char *string, ...)
{
    va_list ap;
    int32_t table_addr;

    if (index >= ENVP_NB_ENTRIES)
        return;

    if (string == NULL) {
        prom_buf[index] = 0;
        return;
    }

    table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
    prom_buf[index] = tswap32(ENVP_ADDR + table_addr);

    va_start(ap, string);
    vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);
    va_end(ap);
}

static int64_t load_kernel (CPUMIPSState *env)
{
    int64_t kernel_entry, kernel_low, kernel_high;
    int index = 0;
    long initrd_size;
    ram_addr_t initrd_offset;
    uint32_t *prom_buf;
    long prom_size;

    if (load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys, NULL,
                 (uint64_t *)&kernel_entry, (uint64_t *)&kernel_low,
                 (uint64_t *)&kernel_high, 0, ELF_MACHINE, 1) < 0) {
        fprintf(stderr, "qemu: could not load kernel '%s'\n",
                loaderparams.kernel_filename);
        exit(1);
    }

    /* load initrd */
    initrd_size = 0;
    initrd_offset = 0;
    if (loaderparams.initrd_filename) {
        initrd_size = get_image_size (loaderparams.initrd_filename);
        if (initrd_size > 0) {
            initrd_offset = (kernel_high + ~INITRD_PAGE_MASK) & INITRD_PAGE_MASK;
            if (initrd_offset + initrd_size > ram_size) {
                fprintf(stderr,
                        "qemu: memory too small for initial ram disk '%s'\n",
                        loaderparams.initrd_filename);
                exit(1);
            }
            initrd_size = load_image_targphys(loaderparams.initrd_filename,
                                     initrd_offset, ram_size - initrd_offset);
        }
        if (initrd_size == (target_ulong) -1) {
            fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
                    loaderparams.initrd_filename);
            exit(1);
        }
    }

    /* Setup prom parameters. */
    prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
    prom_buf = g_malloc(prom_size);

    prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);
    if (initrd_size > 0) {
        prom_set(prom_buf, index++, "rd_start=0x%" PRIx64 " rd_size=%li %s",
                 cpu_mips_phys_to_kseg0(NULL, initrd_offset), initrd_size,
                 loaderparams.kernel_cmdline);
    } else {
        prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);
    }

    /* Setup minimum environment variables */
    prom_set(prom_buf, index++, "busclock=33000000");
    prom_set(prom_buf, index++, "cpuclock=100000000");
    prom_set(prom_buf, index++, "memsize=%i", loaderparams.ram_size/1024/1024);
    prom_set(prom_buf, index++, "modetty0=38400n8r");
    prom_set(prom_buf, index++, NULL);

    rom_add_blob_fixed("prom", prom_buf, prom_size,
                       cpu_mips_kseg0_to_phys(NULL, ENVP_ADDR));

    return kernel_entry;
}

static void write_bootloader (CPUMIPSState *env, uint8_t *base, int64_t kernel_addr)
{
    uint32_t *p;

    /* Small bootloader */
    p = (uint32_t *) base;

    stl_raw(p++, 0x0bf00010);                                      /* j 0x1fc00040 */
    stl_raw(p++, 0x00000000);                                      /* nop */

    /* Second part of the bootloader */
    p = (uint32_t *) (base + 0x040);

    stl_raw(p++, 0x3c040000);                                      /* lui a0, 0 */
    stl_raw(p++, 0x34840002);                                      /* ori a0, a0, 2 */
    stl_raw(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));       /* lui a1, high(ENVP_ADDR) */
    stl_raw(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));               /* ori a1, a0, low(ENVP_ADDR) */
    stl_raw(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff)); /* lui a2, high(ENVP_ADDR + 8) */
    stl_raw(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));         /* ori a2, a2, low(ENVP_ADDR + 8) */
    stl_raw(p++, 0x3c070000 | (loaderparams.ram_size >> 16));      /* lui a3, high(env->ram_size) */
    stl_raw(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));   /* ori a3, a3, low(env->ram_size) */
    stl_raw(p++, 0x3c1f0000 | ((kernel_addr >> 16) & 0xffff));     /* lui ra, high(kernel_addr) */;
    stl_raw(p++, 0x37ff0000 | (kernel_addr & 0xffff));             /* ori ra, ra, low(kernel_addr) */
    stl_raw(p++, 0x03e00008);                                      /* jr ra */
    stl_raw(p++, 0x00000000);                                      /* nop */
}


static void main_cpu_reset(void *opaque)
{
    MIPSCPU *cpu = opaque;
    CPUMIPSState *env = &cpu->env;

    cpu_reset(CPU(cpu));
    /* TODO: 2E reset stuff */
    if (loaderparams.kernel_filename) {
        env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
    }
}

uint8_t eeprom_spd[0x80] = {
    0x80,0x08,0x07,0x0d,0x09,0x02,0x40,0x00,0x04,0x70,
    0x70,0x00,0x82,0x10,0x00,0x01,0x0e,0x04,0x0c,0x01,
    0x02,0x20,0x80,0x75,0x70,0x00,0x00,0x50,0x3c,0x50,
    0x2d,0x20,0xb0,0xb0,0x50,0x50,0x00,0x00,0x00,0x00,
    0x00,0x41,0x48,0x3c,0x32,0x75,0x00,0x00,0x00,0x00,
    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
    0x00,0x00,0x00,0x9c,0x7b,0x07,0x00,0x00,0x00,0x00,
    0x00,0x00,0x00,0x00,0x48,0x42,0x35,0x34,0x41,0x32,
    0x35,0x36,0x38,0x4b,0x4e,0x2d,0x41,0x37,0x35,0x42,
    0x20,0x30,0x20
};

/* Audio support */
static void audio_init (PCIBus *pci_bus)
{
    vt82c686b_ac97_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 5));
    vt82c686b_mc97_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 6));
}

/* Network support */
static void network_init (PCIBus *pci_bus)
{
    int i;

    for(i = 0; i < nb_nics; i++) {
        NICInfo *nd = &nd_table[i];
        const char *default_devaddr = NULL;

        if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {
            /* The fulong board has a RTL8139 card using PCI SLOT 7 */
            default_devaddr = "07";
        }

        pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr);
    }
}

static void cpu_request_exit(void *opaque, int irq, int level)
{
    CPUState *cpu = current_cpu;

    if (cpu && level) {
        cpu_exit(cpu);
    }
}

static void mips_fulong2e_init(QEMUMachineInitArgs *args)
{
    ram_addr_t ram_size = args->ram_size;
    const char *cpu_model = args->cpu_model;
    const char *kernel_filename = args->kernel_filename;
    const char *kernel_cmdline = args->kernel_cmdline;
    const char *initrd_filename = args->initrd_filename;
    char *filename;
    MemoryRegion *address_space_mem = get_system_memory();
    MemoryRegion *ram = g_new(MemoryRegion, 1);
    MemoryRegion *bios = g_new(MemoryRegion, 1);
    long bios_size;
    int64_t kernel_entry;
    qemu_irq *i8259;
    qemu_irq *cpu_exit_irq;
    PCIBus *pci_bus;
    ISABus *isa_bus;
    I2CBus *smbus;
    int i;
    DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
    MIPSCPU *cpu;
    CPUMIPSState *env;

    /* init CPUs */
    if (cpu_model == NULL) {
        cpu_model = "Loongson-2E";
    }
    cpu = cpu_mips_init(cpu_model);
    if (cpu == NULL) {
        fprintf(stderr, "Unable to find CPU definition\n");
        exit(1);
    }
    env = &cpu->env;

    qemu_register_reset(main_cpu_reset, cpu);

    /* fulong 2e has 256M ram. */
    ram_size = 256 * 1024 * 1024;

    /* fulong 2e has a 1M flash.Winbond W39L040AP70Z */
    bios_size = 1024 * 1024;

    /* allocate RAM */
    memory_region_init_ram(ram, NULL, "fulong2e.ram", ram_size);
    vmstate_register_ram_global(ram);
    memory_region_init_ram(bios, NULL, "fulong2e.bios", bios_size);
    vmstate_register_ram_global(bios);
    memory_region_set_readonly(bios, true);

    memory_region_add_subregion(address_space_mem, 0, ram);
    memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);

    /* We do not support flash operation, just loading pmon.bin as raw BIOS.
     * Please use -L to set the BIOS path and -bios to set bios name. */

    if (kernel_filename) {
        loaderparams.ram_size = ram_size;
        loaderparams.kernel_filename = kernel_filename;
        loaderparams.kernel_cmdline = kernel_cmdline;
        loaderparams.initrd_filename = initrd_filename;
        kernel_entry = load_kernel (env);
        write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
    } else {
        if (bios_name == NULL) {
                bios_name = FULONG_BIOSNAME;
        }
        filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
        if (filename) {
            bios_size = load_image_targphys(filename, 0x1fc00000LL,
                                            BIOS_SIZE);
            g_free(filename);
        } else {
            bios_size = -1;
        }

        if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
            !kernel_filename && !qtest_enabled()) {
            error_report("Could not load MIPS bios '%s'", bios_name);
            exit(1);
        }
    }

    /* Init internal devices */
    cpu_mips_irq_init_cpu(env);
    cpu_mips_clock_init(env);

    /* North bridge, Bonito --> IP2 */
    pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));

    /* South bridge */
    ide_drive_get(hd, MAX_IDE_BUS);

    isa_bus = vt82c686b_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 0));
    if (!isa_bus) {
        fprintf(stderr, "vt82c686b_init error\n");
        exit(1);
    }

    /* Interrupt controller */
    /* The 8259 -> IP5  */
    i8259 = i8259_init(isa_bus, env->irq[5]);
    isa_bus_irqs(isa_bus, i8259);

    vt82c686b_ide_init(pci_bus, hd, PCI_DEVFN(FULONG2E_VIA_SLOT, 1));
    pci_create_simple(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 2),
                      "vt82c686b-usb-uhci");
    pci_create_simple(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 3),
                      "vt82c686b-usb-uhci");

    smbus = vt82c686b_pm_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 4),
                              0xeee1, NULL);
    /* TODO: Populate SPD eeprom data.  */
    smbus_eeprom_init(smbus, 1, eeprom_spd, sizeof(eeprom_spd));

    /* init other devices */
    pit = pit_init(isa_bus, 0x40, 0, NULL);
    cpu_exit_irq = qemu_allocate_irqs(cpu_request_exit, NULL, 1);
    DMA_init(0, cpu_exit_irq);

    /* Super I/O */
    isa_create_simple(isa_bus, "i8042");

    rtc_init(isa_bus, 2000, NULL);

    for(i = 0; i < MAX_SERIAL_PORTS; i++) {
        if (serial_hds[i]) {
            serial_isa_init(isa_bus, i, serial_hds[i]);
        }
    }

    if (parallel_hds[0]) {
        parallel_init(isa_bus, 0, parallel_hds[0]);
    }

    /* Sound card */
    audio_init(pci_bus);
    /* Network card */
    network_init(pci_bus);
}

static QEMUMachine mips_fulong2e_machine = {
    .name = "fulong2e",
    .desc = "Fulong 2e mini pc",
    .init = mips_fulong2e_init,
};

static void mips_fulong2e_machine_init(void)
{
    qemu_register_machine(&mips_fulong2e_machine);
}

machine_init(mips_fulong2e_machine_init);