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TOMOYO Linux Cross Reference
Linux/arch/powerpc/boot/ops.h

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  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 BOOT_COMMAND_LINE_SIZE  2048
 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, unsigned int getline_timeout);
 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 
101 static inline void *finddevice(const char *name)
102 {
103         return (dt_ops.finddevice) ? dt_ops.finddevice(name) : NULL;
104 }
105 
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 
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 
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 
130 static inline int del_node(const void *devp)
131 {
132         return dt_ops.del_node ? dt_ops.del_node(devp) : -1;
133 }
134 
135 static inline void *get_parent(const char *devp)
136 {
137         return dt_ops.get_parent ? dt_ops.get_parent(devp) : NULL;
138 }
139 
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 
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 
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 
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 
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 
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 
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 
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 
217 static inline void *malloc(unsigned long size)
218 {
219         return (platform_ops.malloc) ? platform_ops.malloc(size) : NULL;
220 }
221 
222 static inline void free(void *ptr)
223 {
224         if (platform_ops.free)
225                 platform_ops.free(ptr);
226 }
227 
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))
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 

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