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
22 typedef void (*kernel_entry_t)(unsigned long r3, unsigned long r4, void *r5);
23
24 /* Platform specific operations */
25 struct 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 };
34 extern struct platform_ops platform_ops;
35
36 /* Device Tree operations */
37 struct 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 int (*del_node)(const void *phandle);
44 void *(*get_parent)(const void *phandle);
45 /* The node must not already exist. */
46 void *(*create_node)(const void *parent, const char *name);
47 void *(*find_node_by_prop_value)(const void *prev,
48 const char *propname,
49 const char *propval, int proplen);
50 void *(*find_node_by_compatible)(const void *prev,
51 const char *compat);
52 unsigned long (*finalize)(void);
53 char *(*get_path)(const void *phandle, char *buf, int len);
54 };
55 extern struct dt_ops dt_ops;
56
57 /* Console operations */
58 struct console_ops {
59 int (*open)(void);
60 void (*write)(const char *buf, int len);
61 void (*edit_cmdline)(char *buf, int len);
62 void (*close)(void);
63 void *data;
64 };
65 extern struct console_ops console_ops;
66
67 /* Serial console operations */
68 struct serial_console_data {
69 int (*open)(void);
70 void (*putc)(unsigned char c);
71 unsigned char (*getc)(void);
72 u8 (*tstc)(void);
73 void (*close)(void);
74 };
75
76 struct loader_info {
77 void *promptr;
78 unsigned long initrd_addr, initrd_size;
79 char *cmdline;
80 int cmdline_len;
81 };
82 extern struct loader_info loader_info;
83
84 void start(void);
85 void fdt_init(void *blob);
86 int serial_console_init(void);
87 int ns16550_console_init(void *devp, struct serial_console_data *scdp);
88 int mpsc_console_init(void *devp, struct serial_console_data *scdp);
89 int cpm_console_init(void *devp, struct serial_console_data *scdp);
90 int mpc5200_psc_console_init(void *devp, struct serial_console_data *scdp);
91 int uartlite_console_init(void *devp, struct serial_console_data *scdp);
92 void *simple_alloc_init(char *base, unsigned long heap_size,
93 unsigned long granularity, unsigned long max_allocs);
94 extern void flush_cache(void *, unsigned long);
95 int dt_xlate_reg(void *node, int res, unsigned long *addr, unsigned long *size);
96 int dt_xlate_addr(void *node, u32 *buf, int buflen, unsigned long *xlated_addr);
97 int dt_is_compatible(void *node, const char *compat);
98 void dt_get_reg_format(void *node, u32 *naddr, u32 *nsize);
99 int dt_get_virtual_reg(void *node, void **addr, int nres);
100
finddevice(const char * name)101 static inline void *finddevice(const char *name)
102 {
103 return (dt_ops.finddevice) ? dt_ops.finddevice(name) : NULL;
104 }
105
getprop(void * devp,const char * name,void * buf,int buflen)106 static inline int getprop(void *devp, const char *name, void *buf, int buflen)
107 {
108 return (dt_ops.getprop) ? dt_ops.getprop(devp, name, buf, buflen) : -1;
109 }
110
setprop(void * devp,const char * name,const void * buf,int buflen)111 static inline int setprop(void *devp, const char *name,
112 const void *buf, int buflen)
113 {
114 return (dt_ops.setprop) ? dt_ops.setprop(devp, name, buf, buflen) : -1;
115 }
116 #define setprop_val(devp, name, val) \
117 do { \
118 typeof(val) x = (val); \
119 setprop((devp), (name), &x, sizeof(x)); \
120 } while (0)
121
setprop_str(void * devp,const char * name,const char * buf)122 static inline int setprop_str(void *devp, const char *name, const char *buf)
123 {
124 if (dt_ops.setprop)
125 return dt_ops.setprop(devp, name, buf, strlen(buf) + 1);
126
127 return -1;
128 }
129
del_node(const void * devp)130 static inline int del_node(const void *devp)
131 {
132 return dt_ops.del_node ? dt_ops.del_node(devp) : -1;
133 }
134
get_parent(const char * devp)135 static inline void *get_parent(const char *devp)
136 {
137 return dt_ops.get_parent ? dt_ops.get_parent(devp) : NULL;
138 }
139
create_node(const void * parent,const char * name)140 static inline void *create_node(const void *parent, const char *name)
141 {
142 return dt_ops.create_node ? dt_ops.create_node(parent, name) : NULL;
143 }
144
145
find_node_by_prop_value(const void * prev,const char * propname,const char * propval,int proplen)146 static inline void *find_node_by_prop_value(const void *prev,
147 const char *propname,
148 const char *propval, int proplen)
149 {
150 if (dt_ops.find_node_by_prop_value)
151 return dt_ops.find_node_by_prop_value(prev, propname,
152 propval, proplen);
153
154 return NULL;
155 }
156
find_node_by_prop_value_str(const void * prev,const char * propname,const char * propval)157 static inline void *find_node_by_prop_value_str(const void *prev,
158 const char *propname,
159 const char *propval)
160 {
161 return find_node_by_prop_value(prev, propname, propval,
162 strlen(propval) + 1);
163 }
164
find_node_by_devtype(const void * prev,const char * type)165 static inline void *find_node_by_devtype(const void *prev,
166 const char *type)
167 {
168 return find_node_by_prop_value_str(prev, "device_type", type);
169 }
170
find_node_by_alias(const char * alias)171 static inline void *find_node_by_alias(const char *alias)
172 {
173 void *devp = finddevice("/aliases");
174
175 if (devp) {
176 char path[MAX_PATH_LEN];
177 if (getprop(devp, alias, path, MAX_PATH_LEN) > 0)
178 return finddevice(path);
179 }
180
181 return NULL;
182 }
183
find_node_by_compatible(const void * prev,const char * compat)184 static inline void *find_node_by_compatible(const void *prev,
185 const char *compat)
186 {
187 if (dt_ops.find_node_by_compatible)
188 return dt_ops.find_node_by_compatible(prev, compat);
189
190 return NULL;
191 }
192
193 void dt_fixup_memory(u64 start, u64 size);
194 void dt_fixup_cpu_clocks(u32 cpufreq, u32 tbfreq, u32 busfreq);
195 void dt_fixup_clock(const char *path, u32 freq);
196 void dt_fixup_mac_address_by_alias(const char *alias, const u8 *addr);
197 void dt_fixup_mac_address(u32 index, const u8 *addr);
198 void __dt_fixup_mac_addresses(u32 startindex, ...);
199 #define dt_fixup_mac_addresses(...) \
200 __dt_fixup_mac_addresses(0, __VA_ARGS__, NULL)
201
202
find_node_by_linuxphandle(const u32 linuxphandle)203 static inline void *find_node_by_linuxphandle(const u32 linuxphandle)
204 {
205 return find_node_by_prop_value(NULL, "linux,phandle",
206 (char *)&linuxphandle, sizeof(u32));
207 }
208
get_path(const void * phandle,char * buf,int len)209 static inline char *get_path(const void *phandle, char *buf, int len)
210 {
211 if (dt_ops.get_path)
212 return dt_ops.get_path(phandle, buf, len);
213
214 return NULL;
215 }
216
malloc(unsigned long size)217 static inline void *malloc(unsigned long size)
218 {
219 return (platform_ops.malloc) ? platform_ops.malloc(size) : NULL;
220 }
221
free(void * ptr)222 static inline void free(void *ptr)
223 {
224 if (platform_ops.free)
225 platform_ops.free(ptr);
226 }
227
exit(void)228 static inline void exit(void)
229 {
230 if (platform_ops.exit)
231 platform_ops.exit();
232 for(;;);
233 }
234 #define fatal(args...) { printf(args); exit(); }
235
236
237 #define BSS_STACK(size) \
238 static char _bss_stack[size]; \
239 void *_platform_stack_top = _bss_stack + sizeof(_bss_stack);
240
241 extern unsigned long timebase_period_ns;
242 void udelay(long delay);
243
244 extern char _start[];
245 extern char __bss_start[];
246 extern char _end[];
247 extern char _vmlinux_start[];
248 extern char _vmlinux_end[];
249 extern char _initrd_start[];
250 extern char _initrd_end[];
251 extern char _dtb_start[];
252 extern char _dtb_end[];
253
254 static inline __attribute__((const))
__ilog2_u32(u32 n)255 int __ilog2_u32(u32 n)
256 {
257 int bit;
258 asm ("cntlzw %0,%1" : "=r" (bit) : "r" (n));
259 return 31 - bit;
260 }
261
262 #endif /* _PPC_BOOT_OPS_H_ */
263