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
|
/*
* Microblaze kernel loader
*
* Copyright (c) 2012 Peter Crosthwaite <peter.crosthwaite@petalogix.com>
* Copyright (c) 2012 PetaLogix
* Copyright (c) 2009 Edgar E. Iglesias.
*
* 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 "qemu/osdep.h"
#include "qemu/datadir.h"
#include "cpu.h"
#include "qemu/option.h"
#include "qemu/config-file.h"
#include "qemu/error-report.h"
#include "qemu/guest-random.h"
#include "sysemu/device_tree.h"
#include "sysemu/reset.h"
#include "hw/boards.h"
#include "hw/loader.h"
#include "elf.h"
#include "qemu/cutils.h"
#include "boot.h"
static struct
{
void (*machine_cpu_reset)(MicroBlazeCPU *);
uint32_t bootstrap_pc;
uint32_t cmdline;
uint32_t initrd_start;
uint32_t initrd_end;
uint32_t fdt;
} boot_info;
static void main_cpu_reset(void *opaque)
{
MicroBlazeCPU *cpu = opaque;
CPUState *cs = CPU(cpu);
CPUMBState *env = &cpu->env;
cpu_reset(cs);
env->regs[5] = boot_info.cmdline;
env->regs[6] = boot_info.initrd_start;
env->regs[7] = boot_info.fdt;
cpu_set_pc(cs, boot_info.bootstrap_pc);
if (boot_info.machine_cpu_reset) {
boot_info.machine_cpu_reset(cpu);
}
}
static int microblaze_load_dtb(hwaddr addr,
uint32_t ramsize,
uint32_t initrd_start,
uint32_t initrd_end,
const char *kernel_cmdline,
const char *dtb_filename)
{
int fdt_size;
void *fdt = NULL;
int r;
uint8_t rng_seed[32];
if (dtb_filename) {
fdt = load_device_tree(dtb_filename, &fdt_size);
}
if (!fdt) {
return 0;
}
qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed));
qemu_fdt_setprop(fdt, "/chosen", "rng-seed", rng_seed, sizeof(rng_seed));
if (kernel_cmdline) {
r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
kernel_cmdline);
if (r < 0) {
fprintf(stderr, "couldn't set /chosen/bootargs\n");
}
}
if (initrd_start) {
qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
initrd_start);
qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
initrd_end);
}
cpu_physical_memory_write(addr, fdt, fdt_size);
g_free(fdt);
return fdt_size;
}
static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
{
return addr - 0x30000000LL;
}
void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
uint32_t ramsize,
const char *initrd_filename,
const char *dtb_filename,
void (*machine_cpu_reset)(MicroBlazeCPU *))
{
const char *kernel_filename;
const char *kernel_cmdline;
const char *dtb_arg;
char *filename = NULL;
kernel_filename = current_machine->kernel_filename;
kernel_cmdline = current_machine->kernel_cmdline;
dtb_arg = current_machine->dtb;
/* default to pcbios dtb as passed by machine_init */
if (!dtb_arg && dtb_filename) {
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
}
boot_info.machine_cpu_reset = machine_cpu_reset;
qemu_register_reset(main_cpu_reset, cpu);
if (kernel_filename) {
int kernel_size;
uint64_t entry, high;
uint32_t base32;
/* Boots a kernel elf binary. */
kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
&entry, NULL, &high, NULL,
TARGET_BIG_ENDIAN, EM_MICROBLAZE, 0, 0);
base32 = entry;
if (base32 == 0xc0000000) {
kernel_size = load_elf(kernel_filename, NULL,
translate_kernel_address, NULL,
&entry, NULL, NULL, NULL,
TARGET_BIG_ENDIAN, EM_MICROBLAZE, 0, 0);
}
/* Always boot into physical ram. */
boot_info.bootstrap_pc = (uint32_t)entry;
/* If it wasn't an ELF image, try an u-boot image. */
if (kernel_size < 0) {
hwaddr uentry, loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0,
NULL, NULL);
boot_info.bootstrap_pc = uentry;
high = (loadaddr + kernel_size + 3) & ~3;
}
/* Not an ELF image nor an u-boot image, try a RAW image. */
if (kernel_size < 0) {
kernel_size = load_image_targphys(kernel_filename, ddr_base,
ramsize);
boot_info.bootstrap_pc = ddr_base;
high = (ddr_base + kernel_size + 3) & ~3;
}
if (initrd_filename) {
int initrd_size;
uint32_t initrd_offset;
high = ROUND_UP(high + kernel_size, 4);
boot_info.initrd_start = high;
initrd_offset = boot_info.initrd_start - ddr_base;
initrd_size = load_ramdisk(initrd_filename,
boot_info.initrd_start,
ramsize - initrd_offset);
if (initrd_size < 0) {
initrd_size = load_image_targphys(initrd_filename,
boot_info.initrd_start,
ramsize - initrd_offset);
}
if (initrd_size < 0) {
error_report("could not load initrd '%s'",
initrd_filename);
exit(EXIT_FAILURE);
}
boot_info.initrd_end = boot_info.initrd_start + initrd_size;
high = ROUND_UP(high + initrd_size, 4);
}
boot_info.cmdline = high + 4096;
if (kernel_cmdline && strlen(kernel_cmdline)) {
pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
}
/* Provide a device-tree. */
boot_info.fdt = boot_info.cmdline + 4096;
microblaze_load_dtb(boot_info.fdt, ramsize,
boot_info.initrd_start,
boot_info.initrd_end,
kernel_cmdline,
/* Preference a -dtb argument */
dtb_arg ? dtb_arg : filename);
}
g_free(filename);
}
|
