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
|
/*
* QEMU/mipssim emulation
*
* Emulates a very simple machine model similiar to the one use by the
* proprietary MIPS emulator.
*
* Copyright (c) 2007 Thiemo Seufer
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "hw.h"
#include "mips.h"
#include "pc.h"
#include "isa.h"
#include "net.h"
#include "sysemu.h"
#include "boards.h"
#ifdef TARGET_WORDS_BIGENDIAN
#define BIOS_FILENAME "mips_bios.bin"
#else
#define BIOS_FILENAME "mipsel_bios.bin"
#endif
#ifdef TARGET_MIPS64
#define PHYS_TO_VIRT(x) ((x) | ~0x7fffffffULL)
#else
#define PHYS_TO_VIRT(x) ((x) | ~0x7fffffffU)
#endif
#define VIRT_TO_PHYS_ADDEND (-((int64_t)(int32_t)0x80000000))
static struct _loaderparams {
int ram_size;
const char *kernel_filename;
const char *kernel_cmdline;
const char *initrd_filename;
} loaderparams;
static void load_kernel (CPUState *env)
{
int64_t entry, kernel_low, kernel_high;
long kernel_size;
long initrd_size;
ram_addr_t initrd_offset;
kernel_size = load_elf(loaderparams.kernel_filename, VIRT_TO_PHYS_ADDEND,
(uint64_t *)&entry, (uint64_t *)&kernel_low,
(uint64_t *)&kernel_high);
if (kernel_size >= 0) {
if ((entry & ~0x7fffffffULL) == 0x80000000)
entry = (int32_t)entry;
env->active_tc.PC = entry;
} else {
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 + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
if (initrd_offset + initrd_size > loaderparams.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, loaderparams.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);
}
}
}
static void main_cpu_reset(void *opaque)
{
CPUState *env = opaque;
cpu_reset(env);
if (loaderparams.kernel_filename)
load_kernel (env);
}
static void
mips_mipssim_init (ram_addr_t ram_size,
const char *boot_device,
const char *kernel_filename, const char *kernel_cmdline,
const char *initrd_filename, const char *cpu_model)
{
char buf[1024];
ram_addr_t ram_offset;
ram_addr_t bios_offset;
CPUState *env;
int bios_size;
/* Init CPUs. */
if (cpu_model == NULL) {
#ifdef TARGET_MIPS64
cpu_model = "5Kf";
#else
cpu_model = "24Kf";
#endif
}
env = cpu_init(cpu_model);
if (!env) {
fprintf(stderr, "Unable to find CPU definition\n");
exit(1);
}
qemu_register_reset(main_cpu_reset, env);
/* Allocate RAM. */
ram_offset = qemu_ram_alloc(ram_size);
bios_offset = qemu_ram_alloc(BIOS_SIZE);
cpu_register_physical_memory(0, ram_size, ram_offset | IO_MEM_RAM);
/* Map the BIOS / boot exception handler. */
cpu_register_physical_memory(0x1fc00000LL,
BIOS_SIZE, bios_offset | IO_MEM_ROM);
/* Load a BIOS / boot exception handler image. */
if (bios_name == NULL)
bios_name = BIOS_FILENAME;
snprintf(buf, sizeof(buf), "%s/%s", bios_dir, bios_name);
bios_size = load_image_targphys(buf, 0x1fc00000LL, BIOS_SIZE);
if ((bios_size < 0 || bios_size > BIOS_SIZE) && !kernel_filename) {
/* Bail out if we have neither a kernel image nor boot vector code. */
fprintf(stderr,
"qemu: Could not load MIPS bios '%s', and no -kernel argument was specified\n",
buf);
exit(1);
} else {
/* We have a boot vector start address. */
env->active_tc.PC = (target_long)(int32_t)0xbfc00000;
}
if (kernel_filename) {
loaderparams.ram_size = ram_size;
loaderparams.kernel_filename = kernel_filename;
loaderparams.kernel_cmdline = kernel_cmdline;
loaderparams.initrd_filename = initrd_filename;
load_kernel(env);
}
/* Init CPU internal devices. */
cpu_mips_irq_init_cpu(env);
cpu_mips_clock_init(env);
/* Register 64 KB of ISA IO space at 0x1fd00000. */
isa_mmio_init(0x1fd00000, 0x00010000);
/* A single 16450 sits at offset 0x3f8. It is attached to
MIPS CPU INT2, which is interrupt 4. */
if (serial_hds[0])
serial_init(0x3f8, env->irq[4], 115200, serial_hds[0]);
if (nd_table[0].vlan)
/* MIPSnet uses the MIPS CPU INT0, which is interrupt 2. */
mipsnet_init(0x4200, env->irq[2], &nd_table[0]);
}
QEMUMachine mips_mipssim_machine = {
.name = "mipssim",
.desc = "MIPS MIPSsim platform",
.init = mips_mipssim_init,
};
|
