tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Global definition of all the bootwrapper operations.
3 *
4 * Author: Mark A. Greer <mgreer@mvista.com>
5 *
6 * 2006 (c) MontaVista Software, Inc. This file is licensed under
7 * the terms of the GNU General Public License version 2. This program
8 * is licensed "as is" without any warranty of any kind, whether express
9 * or implied.
10 */
11#ifndef _PPC_BOOT_OPS_H_
12#define _PPC_BOOT_OPS_H_
13
14#include <stddef.h>
15#include "types.h"
16#include "string.h"
17
18#define COMMAND_LINE_SIZE 512
19#define MAX_PATH_LEN 256
20#define MAX_PROP_LEN 256 /* What should this be? */
21
22typedef void (*kernel_entry_t)(unsigned long r3, unsigned long r4, void *r5);
23
24/* Platform specific operations */
25struct platform_ops {
26 void (*fixups)(void);
27 void (*image_hdr)(const void *);
28 void * (*malloc)(unsigned long size);
29 void (*free)(void *ptr);
30 void * (*realloc)(void *ptr, unsigned long size);
31 void (*exit)(void);
32 void * (*vmlinux_alloc)(unsigned long size);
33};
34extern struct platform_ops platform_ops;
35
36/* Device Tree operations */
37struct dt_ops {
38 void * (*finddevice)(const char *name);
39 int (*getprop)(const void *phandle, const char *name, void *buf,
40 const int buflen);
41 int (*setprop)(const void *phandle, const char *name,
42 const void *buf, const int buflen);
43 void *(*get_parent)(const void *phandle);
44 /* The node must not already exist. */
45 void *(*create_node)(const void *parent, const char *name);
46 void *(*find_node_by_prop_value)(const void *prev,
47 const char *propname,
48 const char *propval, int proplen);
49 void *(*find_node_by_compatible)(const void *prev,
50 const char *compat);
51 unsigned long (*finalize)(void);
52 char *(*get_path)(const void *phandle, char *buf, int len);
53};
54extern struct dt_ops dt_ops;
55
56/* Console operations */
57struct console_ops {
58 int (*open)(void);
59 void (*write)(const char *buf, int len);
60 void (*edit_cmdline)(char *buf, int len);
61 void (*close)(void);
62 void *data;
63};
64extern struct console_ops console_ops;
65
66/* Serial console operations */
67struct serial_console_data {
68 int (*open)(void);
69 void (*putc)(unsigned char c);
70 unsigned char (*getc)(void);
71 u8 (*tstc)(void);
72 void (*close)(void);
73};
74
75struct loader_info {
76 void *promptr;
77 unsigned long initrd_addr, initrd_size;
78 char *cmdline;
79 int cmdline_len;
80};
81extern struct loader_info loader_info;
82
83void start(void);
84void fdt_init(void *blob);
85int serial_console_init(void);
86int ns16550_console_init(void *devp, struct serial_console_data *scdp);
87int mpsc_console_init(void *devp, struct serial_console_data *scdp);
88int cpm_console_init(void *devp, struct serial_console_data *scdp);
89int mpc5200_psc_console_init(void *devp, struct serial_console_data *scdp);
90int uartlite_console_init(void *devp, struct serial_console_data *scdp);
91void *simple_alloc_init(char *base, unsigned long heap_size,
92 unsigned long granularity, unsigned long max_allocs);
93extern void flush_cache(void *, unsigned long);
94int dt_xlate_reg(void *node, int res, unsigned long *addr, unsigned long *size);
95int dt_xlate_addr(void *node, u32 *buf, int buflen, unsigned long *xlated_addr);
96int dt_is_compatible(void *node, const char *compat);
97void dt_get_reg_format(void *node, u32 *naddr, u32 *nsize);
98
99static inline void *finddevice(const char *name)
100{
101 return (dt_ops.finddevice) ? dt_ops.finddevice(name) : NULL;
102}
103
104static inline int getprop(void *devp, const char *name, void *buf, int buflen)
105{
106 return (dt_ops.getprop) ? dt_ops.getprop(devp, name, buf, buflen) : -1;
107}
108
109static inline int setprop(void *devp, const char *name,
110 const void *buf, int buflen)
111{
112 return (dt_ops.setprop) ? dt_ops.setprop(devp, name, buf, buflen) : -1;
113}
114#define setprop_val(devp, name, val) \
115 do { \
116 typeof(val) x = (val); \
117 setprop((devp), (name), &x, sizeof(x)); \
118 } while (0)
119
120static inline int setprop_str(void *devp, const char *name, const char *buf)
121{
122 if (dt_ops.setprop)
123 return dt_ops.setprop(devp, name, buf, strlen(buf) + 1);
124
125 return -1;
126}
127
128static inline void *get_parent(const char *devp)
129{
130 return dt_ops.get_parent ? dt_ops.get_parent(devp) : NULL;
131}
132
133static inline void *create_node(const void *parent, const char *name)
134{
135 return dt_ops.create_node ? dt_ops.create_node(parent, name) : NULL;
136}
137
138
139static inline void *find_node_by_prop_value(const void *prev,
140 const char *propname,
141 const char *propval, int proplen)
142{
143 if (dt_ops.find_node_by_prop_value)
144 return dt_ops.find_node_by_prop_value(prev, propname,
145 propval, proplen);
146
147 return NULL;
148}
149
150static inline void *find_node_by_prop_value_str(const void *prev,
151 const char *propname,
152 const char *propval)
153{
154 return find_node_by_prop_value(prev, propname, propval,
155 strlen(propval) + 1);
156}
157
158static inline void *find_node_by_devtype(const void *prev,
159 const char *type)
160{
161 return find_node_by_prop_value_str(prev, "device_type", type);
162}
163
164static inline void *find_node_by_alias(const char *alias)
165{
166 void *devp = finddevice("/aliases");
167
168 if (devp) {
169 char path[MAX_PATH_LEN];
170 if (getprop(devp, alias, path, MAX_PATH_LEN) > 0)
171 return finddevice(path);
172 }
173
174 return NULL;
175}
176
177static inline void *find_node_by_compatible(const void *prev,
178 const char *compat)
179{
180 if (dt_ops.find_node_by_compatible)
181 return dt_ops.find_node_by_compatible(prev, compat);
182
183 return NULL;
184}
185
186void dt_fixup_memory(u64 start, u64 size);
187void dt_fixup_cpu_clocks(u32 cpufreq, u32 tbfreq, u32 busfreq);
188void dt_fixup_clock(const char *path, u32 freq);
189void dt_fixup_mac_address_by_alias(const char *alias, const u8 *addr);
190void dt_fixup_mac_address(u32 index, const u8 *addr);
191void __dt_fixup_mac_addresses(u32 startindex, ...);
192#define dt_fixup_mac_addresses(...) \
193 __dt_fixup_mac_addresses(0, __VA_ARGS__, NULL)
194
195
196static inline void *find_node_by_linuxphandle(const u32 linuxphandle)
197{
198 return find_node_by_prop_value(NULL, "linux,phandle",
199 (char *)&linuxphandle, sizeof(u32));
200}
201
202static inline char *get_path(const void *phandle, char *buf, int len)
203{
204 if (dt_ops.get_path)
205 return dt_ops.get_path(phandle, buf, len);
206
207 return NULL;
208}
209
210static inline void *malloc(unsigned long size)
211{
212 return (platform_ops.malloc) ? platform_ops.malloc(size) : NULL;
213}
214
215static inline void free(void *ptr)
216{
217 if (platform_ops.free)
218 platform_ops.free(ptr);
219}
220
221static inline void exit(void)
222{
223 if (platform_ops.exit)
224 platform_ops.exit();
225 for(;;);
226}
227#define fatal(args...) { printf(args); exit(); }
228
229
230#define BSS_STACK(size) \
231 static char _bss_stack[size]; \
232 void *_platform_stack_top = _bss_stack + sizeof(_bss_stack);
233
234extern unsigned long timebase_period_ns;
235void udelay(long delay);
236
237extern char _start[];
238extern char __bss_start[];
239extern char _end[];
240extern char _vmlinux_start[];
241extern char _vmlinux_end[];
242extern char _initrd_start[];
243extern char _initrd_end[];
244extern char _dtb_start[];
245extern char _dtb_end[];
246
247static inline __attribute__((const))
248int __ilog2_u32(u32 n)
249{
250 int bit;
251 asm ("cntlzw %0,%1" : "=r" (bit) : "r" (n));
252 return 31 - bit;
253}
254
255#endif /* _PPC_BOOT_OPS_H_ */