aboutsummaryrefslogtreecommitdiffstats
path: root/hw/milkymist.c
blob: 93288c8401951d3a7f15c5be95cf4236bd7d6a82 (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
/*
 *  QEMU model for the Milkymist board.
 *
 *  Copyright (c) 2010 Michael Walle <michael@walle.cc>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#include "sysbus.h"
#include "hw.h"
#include "net.h"
#include "flash.h"
#include "sysemu.h"
#include "devices.h"
#include "boards.h"
#include "loader.h"
#include "elf.h"
#include "blockdev.h"
#include "milkymist-hw.h"
#include "lm32.h"

#define BIOS_FILENAME    "mmone-bios.bin"
#define BIOS_OFFSET      0x00860000
#define BIOS_SIZE        (512*1024)
#define KERNEL_LOAD_ADDR 0x40000000

typedef struct {
    CPUState *env;
    target_phys_addr_t bootstrap_pc;
    target_phys_addr_t flash_base;
    target_phys_addr_t initrd_base;
    size_t initrd_size;
    target_phys_addr_t cmdline_base;
} ResetInfo;

static void cpu_irq_handler(void *opaque, int irq, int level)
{
    CPUState *env = opaque;

    if (level) {
        cpu_interrupt(env, CPU_INTERRUPT_HARD);
    } else {
        cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
    }
}

static void main_cpu_reset(void *opaque)
{
    ResetInfo *reset_info = opaque;
    CPUState *env = reset_info->env;

    cpu_reset(env);

    /* init defaults */
    env->pc = reset_info->bootstrap_pc;
    env->regs[R_R1] = reset_info->cmdline_base;
    env->regs[R_R2] = reset_info->initrd_base;
    env->regs[R_R3] = reset_info->initrd_base + reset_info->initrd_size;
    env->eba = reset_info->flash_base;
    env->deba = reset_info->flash_base;
}

static void
milkymist_init(ram_addr_t ram_size_not_used,
                          const char *boot_device,
                          const char *kernel_filename,
                          const char *kernel_cmdline,
                          const char *initrd_filename, const char *cpu_model)
{
    CPUState *env;
    int kernel_size;
    DriveInfo *dinfo;
    ram_addr_t phys_sdram;
    ram_addr_t phys_flash;
    qemu_irq irq[32], *cpu_irq;
    int i;
    char *bios_filename;
    ResetInfo *reset_info;

    /* memory map */
    target_phys_addr_t flash_base   = 0x00000000;
    size_t flash_sector_size        = 128 * 1024;
    size_t flash_size               = 32 * 1024 * 1024;
    target_phys_addr_t sdram_base   = 0x40000000;
    size_t sdram_size               = 128 * 1024 * 1024;

    target_phys_addr_t initrd_base  = sdram_base + 0x1002000;
    target_phys_addr_t cmdline_base = sdram_base + 0x1000000;
    size_t initrd_max = sdram_size - 0x1002000;

    reset_info = g_malloc0(sizeof(ResetInfo));

    if (cpu_model == NULL) {
        cpu_model = "lm32-full";
    }
    env = cpu_init(cpu_model);
    reset_info->env = env;

    cpu_lm32_set_phys_msb_ignore(env, 1);

    phys_sdram = qemu_ram_alloc(NULL, "milkymist.sdram", sdram_size);
    cpu_register_physical_memory(sdram_base, sdram_size,
            phys_sdram | IO_MEM_RAM);

    phys_flash = qemu_ram_alloc(NULL, "milkymist.flash", flash_size);
    dinfo = drive_get(IF_PFLASH, 0, 0);
    /* Numonyx JS28F256J3F105 */
    pflash_cfi01_register(flash_base, phys_flash,
                          dinfo ? dinfo->bdrv : NULL, flash_sector_size,
                          flash_size / flash_sector_size, 2,
                          0x00, 0x89, 0x00, 0x1d, 1);

    /* create irq lines */
    cpu_irq = qemu_allocate_irqs(cpu_irq_handler, env, 1);
    env->pic_state = lm32_pic_init(*cpu_irq);
    for (i = 0; i < 32; i++) {
        irq[i] = qdev_get_gpio_in(env->pic_state, i);
    }

    /* load bios rom */
    if (bios_name == NULL) {
        bios_name = BIOS_FILENAME;
    }
    bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);

    if (bios_filename) {
        load_image_targphys(bios_filename, BIOS_OFFSET, BIOS_SIZE);
    }

    reset_info->bootstrap_pc = BIOS_OFFSET;

    /* if no kernel is given no valid bios rom is a fatal error */
    if (!kernel_filename && !dinfo && !bios_filename) {
        fprintf(stderr, "qemu: could not load Milkymist One bios '%s'\n",
                bios_name);
        exit(1);
    }

    milkymist_uart_create(0x60000000, irq[0], irq[1]);
    milkymist_sysctl_create(0x60001000, irq[2], irq[3], irq[4],
            80000000, 0x10014d31, 0x0000041f, 0x00000001);
    milkymist_hpdmc_create(0x60002000);
    milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff);
    milkymist_memcard_create(0x60004000);
    milkymist_ac97_create(0x60005000, irq[5], irq[6], irq[7], irq[8]);
    milkymist_pfpu_create(0x60006000, irq[9]);
    milkymist_tmu2_create(0x60007000, irq[10]);
    milkymist_minimac2_create(0x60008000, 0x30000000, irq[11], irq[12]);
    milkymist_softusb_create(0x6000f000, irq[17],
            0x20000000, 0x1000, 0x20020000, 0x2000);

    /* make sure juart isn't the first chardev */
    env->juart_state = lm32_juart_init();

    if (kernel_filename) {
        uint64_t entry;

        /* Boots a kernel elf binary.  */
        kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
                               1, ELF_MACHINE, 0);
        reset_info->bootstrap_pc = entry;

        if (kernel_size < 0) {
            kernel_size = load_image_targphys(kernel_filename, sdram_base,
                                              sdram_size);
            reset_info->bootstrap_pc = sdram_base;
        }

        if (kernel_size < 0) {
            fprintf(stderr, "qemu: could not load kernel '%s'\n",
                    kernel_filename);
            exit(1);
        }
    }

    if (kernel_cmdline && strlen(kernel_cmdline)) {
        pstrcpy_targphys("cmdline", cmdline_base, TARGET_PAGE_SIZE,
                kernel_cmdline);
        reset_info->cmdline_base = (uint32_t)cmdline_base;
    }

    if (initrd_filename) {
        size_t initrd_size;
        initrd_size = load_image_targphys(initrd_filename, initrd_base,
                initrd_max);
        reset_info->initrd_base = (uint32_t)initrd_base;
        reset_info->initrd_size = (uint32_t)initrd_size;
    }

    qemu_register_reset(main_cpu_reset, reset_info);
}

static QEMUMachine milkymist_machine = {
    .name = "milkymist",
    .desc = "Milkymist One",
    .init = milkymist_init,
    .is_default = 0
};

static void milkymist_machine_init(void)
{
    qemu_register_machine(&milkymist_machine);
}

machine_init(milkymist_machine_init);