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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         void    (*kentry)(unsigned long fdt_addr, void *vmlinux_addr);
 34 };
 35 extern struct platform_ops platform_ops;
 36 
 37 /* Device Tree operations */
 38 struct dt_ops {
 39         void *  (*finddevice)(const char *name);
 40         int     (*getprop)(const void *phandle, const char *name, void *buf,
 41                         const int buflen);
 42         int     (*setprop)(const void *phandle, const char *name,
 43                         const void *buf, const int buflen);
 44         int (*del_node)(const void *phandle);
 45         void *(*get_parent)(const void *phandle);
 46         /* The node must not already exist. */
 47         void *(*create_node)(const void *parent, const char *name);
 48         void *(*find_node_by_prop_value)(const void *prev,
 49                                          const char *propname,
 50                                          const char *propval, int proplen);
 51         void *(*find_node_by_compatible)(const void *prev,
 52                                          const char *compat);
 53         unsigned long (*finalize)(void);
 54         char *(*get_path)(const void *phandle, char *buf, int len);
 55 };
 56 extern struct dt_ops dt_ops;
 57 
 58 /* Console operations */
 59 struct console_ops {
 60         int     (*open)(void);
 61         void    (*write)(const char *buf, int len);
 62         void    (*edit_cmdline)(char *buf, int len, unsigned int getline_timeout);
 63         void    (*close)(void);
 64         void    *data;
 65 };
 66 extern struct console_ops console_ops;
 67 
 68 /* Serial console operations */
 69 struct serial_console_data {
 70         int             (*open)(void);
 71         void            (*putc)(unsigned char c);
 72         unsigned char   (*getc)(void);
 73         u8              (*tstc)(void);
 74         void            (*close)(void);
 75 };
 76 
 77 struct loader_info {
 78         void *promptr;
 79         unsigned long initrd_addr, initrd_size;
 80         char *cmdline;
 81         int cmdline_len;
 82 };
 83 extern struct loader_info loader_info;
 84 
 85 void start(void);
 86 void fdt_init(void *blob);
 87 int serial_console_init(void);
 88 int ns16550_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 int opal_console_init(void *devp, struct serial_console_data *scdp);
 93 void *simple_alloc_init(char *base, unsigned long heap_size,
 94                         unsigned long granularity, unsigned long max_allocs);
 95 extern void flush_cache(void *, unsigned long);
 96 int dt_xlate_reg(void *node, int res, unsigned long *addr, unsigned long *size);
 97 int dt_xlate_addr(void *node, u32 *buf, int buflen, unsigned long *xlated_addr);
 98 int dt_is_compatible(void *node, const char *compat);
 99 void dt_get_reg_format(void *node, u32 *naddr, u32 *nsize);
100 int dt_get_virtual_reg(void *node, void **addr, int nres);
101 
102 static inline void *finddevice(const char *name)
103 {
104         return (dt_ops.finddevice) ? dt_ops.finddevice(name) : NULL;
105 }
106 
107 static inline int getprop(void *devp, const char *name, void *buf, int buflen)
108 {
109         return (dt_ops.getprop) ? dt_ops.getprop(devp, name, buf, buflen) : -1;
110 }
111 
112 static inline int setprop(void *devp, const char *name,
113                           const void *buf, int buflen)
114 {
115         return (dt_ops.setprop) ? dt_ops.setprop(devp, name, buf, buflen) : -1;
116 }
117 #define setprop_val(devp, name, val) \
118         do { \
119                 typeof(val) x = (val); \
120                 setprop((devp), (name), &x, sizeof(x)); \
121         } while (0)
122 
123 static inline int setprop_str(void *devp, const char *name, const char *buf)
124 {
125         if (dt_ops.setprop)
126                 return dt_ops.setprop(devp, name, buf, strlen(buf) + 1);
127 
128         return -1;
129 }
130 
131 static inline int del_node(const void *devp)
132 {
133         return dt_ops.del_node ? dt_ops.del_node(devp) : -1;
134 }
135 
136 static inline void *get_parent(const char *devp)
137 {
138         return dt_ops.get_parent ? dt_ops.get_parent(devp) : NULL;
139 }
140 
141 static inline void *create_node(const void *parent, const char *name)
142 {
143         return dt_ops.create_node ? dt_ops.create_node(parent, name) : NULL;
144 }
145 
146 
147 static inline void *find_node_by_prop_value(const void *prev,
148                                             const char *propname,
149                                             const char *propval, int proplen)
150 {
151         if (dt_ops.find_node_by_prop_value)
152                 return dt_ops.find_node_by_prop_value(prev, propname,
153                                                       propval, proplen);
154 
155         return NULL;
156 }
157 
158 static inline void *find_node_by_prop_value_str(const void *prev,
159                                                 const char *propname,
160                                                 const char *propval)
161 {
162         return find_node_by_prop_value(prev, propname, propval,
163                                        strlen(propval) + 1);
164 }
165 
166 static inline void *find_node_by_devtype(const void *prev,
167                                          const char *type)
168 {
169         return find_node_by_prop_value_str(prev, "device_type", type);
170 }
171 
172 static inline void *find_node_by_alias(const char *alias)
173 {
174         void *devp = finddevice("/aliases");
175 
176         if (devp) {
177                 char path[MAX_PATH_LEN];
178                 if (getprop(devp, alias, path, MAX_PATH_LEN) > 0)
179                         return finddevice(path);
180         }
181 
182         return NULL;
183 }
184 
185 static inline void *find_node_by_compatible(const void *prev,
186                                             const char *compat)
187 {
188         if (dt_ops.find_node_by_compatible)
189                 return dt_ops.find_node_by_compatible(prev, compat);
190 
191         return NULL;
192 }
193 
194 void dt_fixup_memory(u64 start, u64 size);
195 void dt_fixup_cpu_clocks(u32 cpufreq, u32 tbfreq, u32 busfreq);
196 void dt_fixup_clock(const char *path, u32 freq);
197 void dt_fixup_mac_address_by_alias(const char *alias, const u8 *addr);
198 void dt_fixup_mac_address(u32 index, const u8 *addr);
199 void __dt_fixup_mac_addresses(u32 startindex, ...);
200 #define dt_fixup_mac_addresses(...) \
201         __dt_fixup_mac_addresses(0, __VA_ARGS__, NULL)
202 
203 
204 static inline void *find_node_by_linuxphandle(const u32 linuxphandle)
205 {
206         return find_node_by_prop_value(NULL, "linux,phandle",
207                         (char *)&linuxphandle, sizeof(u32));
208 }
209 
210 static inline char *get_path(const void *phandle, char *buf, int len)
211 {
212         if (dt_ops.get_path)
213                 return dt_ops.get_path(phandle, buf, len);
214 
215         return NULL;
216 }
217 
218 static inline void *malloc(unsigned long size)
219 {
220         return (platform_ops.malloc) ? platform_ops.malloc(size) : NULL;
221 }
222 
223 static inline void free(void *ptr)
224 {
225         if (platform_ops.free)
226                 platform_ops.free(ptr);
227 }
228 
229 static inline void exit(void)
230 {
231         if (platform_ops.exit)
232                 platform_ops.exit();
233         for(;;);
234 }
235 #define fatal(args...) { printf(args); exit(); }
236 
237 
238 #define BSS_STACK(size) \
239         static char _bss_stack[size]; \
240         void *_platform_stack_top = _bss_stack + sizeof(_bss_stack);
241 
242 extern unsigned long timebase_period_ns;
243 void udelay(long delay);
244 
245 extern char _start[];
246 extern char __bss_start[];
247 extern char _end[];
248 extern char _vmlinux_start[];
249 extern char _vmlinux_end[];
250 extern char _initrd_start[];
251 extern char _initrd_end[];
252 extern char _dtb_start[];
253 extern char _dtb_end[];
254 
255 static inline __attribute__((const))
256 int __ilog2_u32(u32 n)
257 {
258         int bit;
259         asm ("cntlzw %0,%1" : "=r" (bit) : "r" (n));
260         return 31 - bit;
261 }
262 
263 long partial_decompress(void *inbuf, unsigned long input_size, void *outbuf,
264         unsigned long output_size, unsigned long skip);
265 
266 #endif /* _PPC_BOOT_OPS_H_ */
267 

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