tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
[POWERPC] Use embedded libfdt in the bootwrapper
This incorporates libfdt (from the source embedded in an earlier
commit) into the wrapper.a library used by the bootwrapper. This
includes adding a libfdt_env.h file, which the libfdt sources need in
order to integrate into the bootwrapper environment, and a
libfdt-wrapper.c which provides glue to connect the bootwrapper's
abstract device tree callbacks to the libfdt functions.
In addition, this changes the various wrapper and platform files to
use libfdt functions instead of the older flatdevtree.c library.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
authored by
David Gibson
and committed by
Paul Mackerras
2f0dfeaa
1cade994
+219
-16
+5
-1
arch/powerpc/boot/Makefile
+5
-1
arch/powerpc/boot/Makefile
···
33
33
BOOTCFLAGS += -fno-stack-protector
34
34
endif
35
35
36
-
BOOTCFLAGS += -I$(obj) -I$(srctree)/$(obj)
36
+
BOOTCFLAGS += -I$(obj) -I$(srctree)/$(obj) -I$(srctree)/$(src)/libfdt
37
37
38
38
$(obj)/4xx.o: BOOTCFLAGS += -mcpu=440
39
39
$(obj)/ebony.o: BOOTCFLAGS += -mcpu=440
···
46
46
$(addprefix $(obj)/,$(zlib) gunzip_util.o main.o): \
47
47
$(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
48
48
49
+
src-libfdt := fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c fdt_strerror.c
49
50
src-wlib := string.S crt0.S stdio.c main.c flatdevtree.c flatdevtree_misc.c \
51
+
$(addprefix libfdt/,$(src-libfdt)) libfdt-wrapper.c \
50
52
ns16550.c serial.c simple_alloc.c div64.S util.S \
51
53
gunzip_util.c elf_util.c $(zlib) devtree.c oflib.c ofconsole.c \
52
54
4xx.c ebony.c mv64x60.c mpsc.c mv64x60_i2c.c cuboot.c bamboo.c \
···
103
101
cmd_bootar = $(CROSS32AR) -cr $@.$$$$ $(filter-out FORCE,$^); mv $@.$$$$ $@
104
102
105
103
$(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c FORCE
104
+
$(Q)mkdir -p $(dir $@)
106
105
$(call if_changed_dep,bootcc)
107
106
$(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S FORCE
107
+
$(Q)mkdir -p $(dir $@)
108
108
$(call if_changed_dep,bootas)
109
109
110
110
$(obj)/wrapper.a: $(obj-wlib) FORCE
+1
-1
arch/powerpc/boot/bamboo.c
+1
-1
arch/powerpc/boot/bamboo.c
+1
-1
arch/powerpc/boot/cuboot-52xx.c
+1
-1
arch/powerpc/boot/cuboot-52xx.c
+1
-1
arch/powerpc/boot/cuboot-83xx.c
+1
-1
arch/powerpc/boot/cuboot-83xx.c
+1
-1
arch/powerpc/boot/cuboot-85xx.c
+1
-1
arch/powerpc/boot/cuboot-85xx.c
+1
-1
arch/powerpc/boot/cuboot-8xx.c
+1
-1
arch/powerpc/boot/cuboot-8xx.c
+1
-1
arch/powerpc/boot/cuboot-hpc2.c
+1
-1
arch/powerpc/boot/cuboot-hpc2.c
+1
-1
arch/powerpc/boot/cuboot-pq2.c
+1
-1
arch/powerpc/boot/cuboot-pq2.c
+1
-1
arch/powerpc/boot/cuboot-sequoia.c
+1
-1
arch/powerpc/boot/cuboot-sequoia.c
+1
-1
arch/powerpc/boot/ebony.c
+1
-1
arch/powerpc/boot/ebony.c
+1
-1
arch/powerpc/boot/ep88xc.c
+1
-1
arch/powerpc/boot/ep88xc.c
+1
-1
arch/powerpc/boot/holly.c
+1
-1
arch/powerpc/boot/holly.c
+182
arch/powerpc/boot/libfdt-wrapper.c
+182
arch/powerpc/boot/libfdt-wrapper.c
···
1
+
/*
2
+
* This file does the necessary interface mapping between the bootwrapper
3
+
* device tree operations and the interface provided by shared source
4
+
* files flatdevicetree.[ch].
5
+
*
6
+
* Copyright 2007 David Gibson, IBM Corporation.
7
+
*
8
+
* This library is free software; you can redistribute it and/or
9
+
* modify it under the terms of the GNU General Public License as
10
+
* published by the Free Software Foundation; either version 2 of the
11
+
* License, or (at your option) any later version.
12
+
*
13
+
* This library is distributed in the hope that it will be useful, but
14
+
* WITHOUT ANY WARRANTY; without even the implied warranty of
15
+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
+
* General Public License for more details.
17
+
*
18
+
* You should have received a copy of the GNU General Public License
19
+
* along with this library; if not, write to the Free Software
20
+
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
21
+
* 02110-1301 USA
22
+
*/
23
+
24
+
#include <stddef.h>
25
+
#include <stdio.h>
26
+
#include <page.h>
27
+
#include <libfdt.h>
28
+
#include "ops.h"
29
+
30
+
#define DEBUG 0
31
+
#define BAD_ERROR(err) (((err) < 0) \
32
+
&& ((err) != -FDT_ERR_NOTFOUND) \
33
+
&& ((err) != -FDT_ERR_EXISTS))
34
+
35
+
#define check_err(err) \
36
+
({ \
37
+
if (BAD_ERROR(err) || ((err < 0) && DEBUG)) \
38
+
printf("%s():%d %s\n\r", __FUNCTION__, __LINE__, \
39
+
fdt_strerror(err)); \
40
+
if (BAD_ERROR(err)) \
41
+
exit(); \
42
+
(err < 0) ? -1 : 0; \
43
+
})
44
+
45
+
#define offset_devp(off) \
46
+
({ \
47
+
int offset = (off); \
48
+
check_err(offset) ? NULL : (void *)(offset+1); \
49
+
})
50
+
51
+
#define devp_offset(devp) (((int)(devp))-1)
52
+
53
+
static void *fdt;
54
+
static void *buf; /* = NULL */
55
+
56
+
#define EXPAND_GRANULARITY 1024
57
+
58
+
static void expand_buf(int minexpand)
59
+
{
60
+
int size = fdt_totalsize(fdt);
61
+
int rc;
62
+
63
+
size = _ALIGN(size + minexpand, EXPAND_GRANULARITY);
64
+
buf = platform_ops.realloc(buf, size);
65
+
if (!buf)
66
+
fatal("Couldn't find %d bytes to expand device tree\n\r", size);
67
+
rc = fdt_open_into(fdt, buf, size);
68
+
if (rc != 0)
69
+
fatal("Couldn't expand fdt into new buffer: %s\n\r",
70
+
fdt_strerror(rc));
71
+
72
+
fdt = buf;
73
+
}
74
+
75
+
static void *fdt_wrapper_finddevice(const char *path)
76
+
{
77
+
return offset_devp(fdt_path_offset(fdt, path));
78
+
}
79
+
80
+
static int fdt_wrapper_getprop(const void *devp, const char *name,
81
+
void *buf, const int buflen)
82
+
{
83
+
const void *p;
84
+
int len;
85
+
86
+
p = fdt_getprop(fdt, devp_offset(devp), name, &len);
87
+
if (!p)
88
+
return check_err(len);
89
+
memcpy(buf, p, min(len, buflen));
90
+
return len;
91
+
}
92
+
93
+
static int fdt_wrapper_setprop(const void *devp, const char *name,
94
+
const void *buf, const int len)
95
+
{
96
+
int rc;
97
+
98
+
rc = fdt_setprop(fdt, devp_offset(devp), name, buf, len);
99
+
if (rc == -FDT_ERR_NOSPACE) {
100
+
expand_buf(len + 16);
101
+
rc = fdt_setprop(fdt, devp_offset(devp), name, buf, len);
102
+
}
103
+
104
+
return check_err(rc);
105
+
}
106
+
107
+
static void *fdt_wrapper_get_parent(const void *devp)
108
+
{
109
+
return offset_devp(fdt_parent_offset(fdt, devp_offset(devp)));
110
+
}
111
+
112
+
static void *fdt_wrapper_create_node(const void *devp, const char *name)
113
+
{
114
+
int offset;
115
+
116
+
offset = fdt_add_subnode(fdt, devp_offset(devp), name);
117
+
if (offset == -FDT_ERR_NOSPACE) {
118
+
expand_buf(strlen(name) + 16);
119
+
offset = fdt_add_subnode(fdt, devp_offset(devp), name);
120
+
}
121
+
122
+
return offset_devp(offset);
123
+
}
124
+
125
+
static void *fdt_wrapper_find_node_by_prop_value(const void *prev,
126
+
const char *name,
127
+
const char *val,
128
+
int len)
129
+
{
130
+
return offset_devp(fdt_node_offset_by_prop_value(fdt, devp_offset(prev),
131
+
name, val, len));
132
+
}
133
+
134
+
static char *fdt_wrapper_get_path(const void *devp, char *buf, int len)
135
+
{
136
+
int rc;
137
+
138
+
rc = fdt_get_path(fdt, devp_offset(devp), buf, len);
139
+
if (check_err(rc))
140
+
return NULL;
141
+
return buf;
142
+
}
143
+
144
+
static unsigned long fdt_wrapper_finalize(void)
145
+
{
146
+
int rc;
147
+
148
+
rc = fdt_pack(fdt);
149
+
if (rc != 0)
150
+
fatal("Couldn't pack flat tree: %s\n\r",
151
+
fdt_strerror(rc));
152
+
return (unsigned long)fdt;
153
+
}
154
+
155
+
void fdt_init(void *blob)
156
+
{
157
+
int err;
158
+
159
+
dt_ops.finddevice = fdt_wrapper_finddevice;
160
+
dt_ops.getprop = fdt_wrapper_getprop;
161
+
dt_ops.setprop = fdt_wrapper_setprop;
162
+
dt_ops.get_parent = fdt_wrapper_get_parent;
163
+
dt_ops.create_node = fdt_wrapper_create_node;
164
+
dt_ops.find_node_by_prop_value = fdt_wrapper_find_node_by_prop_value;
165
+
dt_ops.get_path = fdt_wrapper_get_path;
166
+
dt_ops.finalize = fdt_wrapper_finalize;
167
+
168
+
/* Make sure the dt blob is the right version and so forth */
169
+
fdt = blob;
170
+
err = fdt_open_into(fdt, fdt, fdt_totalsize(blob));
171
+
if (err == -FDT_ERR_NOSPACE) {
172
+
int bufsize = fdt_totalsize(fdt) + 4;
173
+
buf = malloc(bufsize);
174
+
err = fdt_open_into(fdt, buf, bufsize);
175
+
}
176
+
177
+
if (err != 0)
178
+
fatal("fdt_init(): %s\n\r", fdt_strerror(err));
179
+
180
+
if (buf)
181
+
fdt = buf;
182
+
}
+17
arch/powerpc/boot/libfdt_env.h
+17
arch/powerpc/boot/libfdt_env.h
···
1
+
#ifndef _ARCH_POWERPC_BOOT_LIBFDT_ENV_H
2
+
#define _ARCH_POWERPC_BOOT_LIBFDT_ENV_H
3
+
4
+
#include <types.h>
5
+
#include <string.h>
6
+
7
+
typedef u32 uint32_t;
8
+
typedef u64 uint64_t;
9
+
10
+
#define fdt16_to_cpu(x) (x)
11
+
#define cpu_to_fdt16(x) (x)
12
+
#define fdt32_to_cpu(x) (x)
13
+
#define cpu_to_fdt32(x) (x)
14
+
#define fdt64_to_cpu(x) (x)
15
+
#define cpu_to_fdt64(x) (x)
16
+
17
+
#endif /* _ARCH_POWERPC_BOOT_LIBFDT_ENV_H */
+1
arch/powerpc/boot/ops.h
+1
arch/powerpc/boot/ops.h
···
80
80
81
81
void start(void);
82
82
int ft_init(void *dt_blob, unsigned int max_size, unsigned int max_find_device);
83
+
void fdt_init(void *blob);
83
84
int serial_console_init(void);
84
85
int ns16550_console_init(void *devp, struct serial_console_data *scdp);
85
86
int mpsc_console_init(void *devp, struct serial_console_data *scdp);
+1
-2
arch/powerpc/boot/prpmc2800.c
+1
-2
arch/powerpc/boot/prpmc2800.c
+1
-1
arch/powerpc/boot/ps3.c
+1
-1
arch/powerpc/boot/ps3.c
+1
-1
arch/powerpc/boot/treeboot-walnut.c
+1
-1
arch/powerpc/boot/treeboot-walnut.c