root / hw / cris-boot.c @ 3a9d8549
History | View | Annotate | Download (3 kB)
1 |
/*
|
---|---|
2 |
* CRIS image loading.
|
3 |
*
|
4 |
* Copyright (c) 2010 Edgar E. Iglesias, Axis Communications AB.
|
5 |
*
|
6 |
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
7 |
* of this software and associated documentation files (the "Software"), to deal
|
8 |
* in the Software without restriction, including without limitation the rights
|
9 |
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
10 |
* copies of the Software, and to permit persons to whom the Software is
|
11 |
* furnished to do so, subject to the following conditions:
|
12 |
*
|
13 |
* The above copyright notice and this permission notice shall be included in
|
14 |
* all copies or substantial portions of the Software.
|
15 |
*
|
16 |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
17 |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
18 |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
19 |
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
20 |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
21 |
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
22 |
* THE SOFTWARE.
|
23 |
*/
|
24 |
|
25 |
#include "hw.h" |
26 |
#include "loader.h" |
27 |
#include "elf.h" |
28 |
#include "cris-boot.h" |
29 |
|
30 |
static void main_cpu_reset(void *opaque) |
31 |
{ |
32 |
CPUState *env = opaque; |
33 |
struct cris_load_info *li;
|
34 |
|
35 |
li = env->load_info; |
36 |
|
37 |
cpu_reset(env); |
38 |
|
39 |
if (!li) {
|
40 |
/* nothing more to do. */
|
41 |
return;
|
42 |
} |
43 |
|
44 |
env->pc = li->entry; |
45 |
|
46 |
if (li->image_filename) {
|
47 |
env->regs[8] = 0x56902387; /* RAM boot magic. */ |
48 |
env->regs[9] = 0x40004000 + li->image_size; |
49 |
} |
50 |
|
51 |
if (li->cmdline) {
|
52 |
/* Let the kernel know we are modifying the cmdline. */
|
53 |
env->regs[10] = 0x87109563; |
54 |
env->regs[11] = 0x40000000; |
55 |
} |
56 |
} |
57 |
|
58 |
static uint64_t translate_kernel_address(void *opaque, uint64_t addr) |
59 |
{ |
60 |
return addr - 0x80000000LL; |
61 |
} |
62 |
|
63 |
void cris_load_image(CPUState *env, struct cris_load_info *li) |
64 |
{ |
65 |
uint64_t entry, high; |
66 |
int kcmdline_len;
|
67 |
int image_size;
|
68 |
|
69 |
env->load_info = li; |
70 |
/* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis
|
71 |
devboard SDK. */
|
72 |
image_size = load_elf(li->image_filename, translate_kernel_address, NULL,
|
73 |
&entry, NULL, &high, 0, ELF_MACHINE, 0); |
74 |
li->entry = entry; |
75 |
if (image_size < 0) { |
76 |
/* Takes a kimage from the axis devboard SDK. */
|
77 |
image_size = load_image_targphys(li->image_filename, 0x40004000,
|
78 |
ram_size); |
79 |
li->entry = 0x40004000;
|
80 |
} |
81 |
|
82 |
if (image_size < 0) { |
83 |
fprintf(stderr, "qemu: could not load kernel '%s'\n",
|
84 |
li->image_filename); |
85 |
exit(1);
|
86 |
} |
87 |
|
88 |
if (li->cmdline && (kcmdline_len = strlen(li->cmdline))) {
|
89 |
if (kcmdline_len > 256) { |
90 |
fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");
|
91 |
exit(1);
|
92 |
} |
93 |
pstrcpy_targphys("cmdline", 0x40000000, 256, li->cmdline); |
94 |
} |
95 |
qemu_register_reset(main_cpu_reset, env); |
96 |
} |