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
|
/*
* 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 "qemu/osdep.h"
#include "qemu-common.h"
#include "cpu.h"
#include "hw/sysbus.h"
#include "hw/hw.h"
#include "hw/block/flash.h"
#include "sysemu/sysemu.h"
#include "sysemu/qtest.h"
#include "hw/devices.h"
#include "hw/boards.h"
#include "hw/loader.h"
#include "elf.h"
#include "sysemu/block-backend.h"
#include "milkymist-hw.h"
#include "lm32.h"
#include "exec/address-spaces.h"
#include "qemu/cutils.h"
#define BIOS_FILENAME "mmone-bios.bin"
#define BIOS_OFFSET 0x00860000
#define BIOS_SIZE (512*1024)
#define KERNEL_LOAD_ADDR 0x40000000
typedef struct {
LM32CPU *cpu;
hwaddr bootstrap_pc;
hwaddr flash_base;
hwaddr initrd_base;
size_t initrd_size;
hwaddr cmdline_base;
} ResetInfo;
static void cpu_irq_handler(void *opaque, int irq, int level)
{
LM32CPU *cpu = opaque;
CPUState *cs = CPU(cpu);
if (level) {
cpu_interrupt(cs, CPU_INTERRUPT_HARD);
} else {
cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
}
}
static void main_cpu_reset(void *opaque)
{
ResetInfo *reset_info = opaque;
CPULM32State *env = &reset_info->cpu->env;
cpu_reset(CPU(reset_info->cpu));
/* 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(MachineState *machine)
{
const char *cpu_model = machine->cpu_model;
const char *kernel_filename = machine->kernel_filename;
const char *kernel_cmdline = machine->kernel_cmdline;
const char *initrd_filename = machine->initrd_filename;
LM32CPU *cpu;
CPULM32State *env;
int kernel_size;
DriveInfo *dinfo;
MemoryRegion *address_space_mem = get_system_memory();
MemoryRegion *phys_sdram = g_new(MemoryRegion, 1);
qemu_irq irq[32];
int i;
char *bios_filename;
ResetInfo *reset_info;
/* memory map */
hwaddr flash_base = 0x00000000;
size_t flash_sector_size = 128 * 1024;
size_t flash_size = 32 * 1024 * 1024;
hwaddr sdram_base = 0x40000000;
size_t sdram_size = 128 * 1024 * 1024;
hwaddr initrd_base = sdram_base + 0x1002000;
hwaddr 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";
}
cpu = cpu_lm32_init(cpu_model);
if (cpu == NULL) {
fprintf(stderr, "qemu: unable to find CPU '%s'\n", cpu_model);
exit(1);
}
env = &cpu->env;
reset_info->cpu = cpu;
cpu_lm32_set_phys_msb_ignore(env, 1);
memory_region_allocate_system_memory(phys_sdram, NULL, "milkymist.sdram",
sdram_size);
memory_region_add_subregion(address_space_mem, sdram_base, phys_sdram);
dinfo = drive_get(IF_PFLASH, 0, 0);
/* Numonyx JS28F256J3F105 */
pflash_cfi01_register(flash_base, NULL, "milkymist.flash", flash_size,
dinfo ? blk_by_legacy_dinfo(dinfo) : NULL,
flash_sector_size, flash_size / flash_sector_size,
2, 0x00, 0x89, 0x00, 0x1d, 1);
/* create irq lines */
env->pic_state = lm32_pic_init(qemu_allocate_irq(cpu_irq_handler, cpu, 0));
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 && !qtest_enabled()) {
fprintf(stderr, "qemu: could not load Milkymist One bios '%s'\n",
bios_name);
exit(1);
}
g_free(bios_filename);
milkymist_uart_create(0x60000000, irq[0]);
milkymist_sysctl_create(0x60001000, irq[1], irq[2], irq[3],
80000000, 0x10014d31, 0x0000041f, 0x00000001);
milkymist_hpdmc_create(0x60002000);
milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff);
milkymist_memcard_create(0x60004000);
milkymist_ac97_create(0x60005000, irq[4], irq[5], irq[6], irq[7]);
milkymist_pfpu_create(0x60006000, irq[8]);
if (display_type != DT_NOGRAPHIC) {
milkymist_tmu2_create(0x60007000, irq[9]);
}
milkymist_minimac2_create(0x60008000, 0x30000000, irq[10], irq[11]);
milkymist_softusb_create(0x6000f000, irq[15],
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, EM_LATTICEMICO32, 0, 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 void milkymist_machine_init(MachineClass *mc)
{
mc->desc = "Milkymist One";
mc->init = milkymist_init;
mc->is_default = 0;
}
DEFINE_MACHINE("milkymist", milkymist_machine_init)
|
