arch/powerpc/boot/ops.h

   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 /* Platform specific operations */
  23 struct platform_ops {
  24         void    (*fixups)(void);
  25         void    (*image_hdr)(const void *);
  26         void *  (*malloc)(u32 size);
  27         void    (*free)(void *ptr);
  28         void *  (*realloc)(void *ptr, unsigned long size);
  29         void    (*exit)(void);
  30         void *  (*vmlinux_alloc)(unsigned long size);
  31 };
  32 extern struct platform_ops platform_ops;
  33
  34 /* Device Tree operations */
  35 struct dt_ops {
  36         void *  (*finddevice)(const char *name);
  37         int     (*getprop)(const void *phandle, const char *name, void *buf,
  38                         const int buflen);
  39         int     (*setprop)(const void *phandle, const char *name,
  40                         const void *buf, const int buflen);
  41         void *(*get_parent)(const void *phandle);
  42         /* The node must not already exist. */
  43         void *(*create_node)(const void *parent, const char *name);
  44         void *(*find_node_by_prop_value)(const void *prev,
  45                                          const char *propname,
  46                                          const char *propval, int proplen);
  47         unsigned long (*finalize)(void);
  48 };
  49 extern struct dt_ops dt_ops;
  50
  51 /* Console operations */
  52 struct console_ops {
  53         int     (*open)(void);
  54         void    (*write)(char *buf, int len);
  55         void    (*edit_cmdline)(char *buf, int len);
  56         void    (*close)(void);
  57         void    *data;
  58 };
  59 extern struct console_ops console_ops;
  60
  61 /* Serial console operations */
  62 struct serial_console_data {
  63         int             (*open)(void);
  64         void            (*putc)(unsigned char c);
  65         unsigned char   (*getc)(void);
  66         u8              (*tstc)(void);
  67         void            (*close)(void);
  68 };
  69
  70 struct loader_info {
  71         void *promptr;
  72         unsigned long initrd_addr, initrd_size;
  73 };
  74 extern struct loader_info loader_info;
  75
  76 void start(void);
  77 int ft_init(void *dt_blob, unsigned int max_size, unsigned int max_find_device);
  78 int serial_console_init(void);
  79 int ns16550_console_init(void *devp, struct serial_console_data *scdp);
  80 void *simple_alloc_init(char *base, u32 heap_size, u32 granularity,
  81                 u32 max_allocs);
  82 extern void flush_cache(void *, unsigned long);
  83
  84 static inline void *finddevice(const char *name)
  85 {
  86         return (dt_ops.finddevice) ? dt_ops.finddevice(name) : NULL;
  87 }
  88
  89 static inline int getprop(void *devp, const char *name, void *buf, int buflen)
  90 {
  91         return (dt_ops.getprop) ? dt_ops.getprop(devp, name, buf, buflen) : -1;
  92 }
  93
  94 static inline int setprop(void *devp, const char *name,
  95                           const void *buf, int buflen)
  96 {
  97         return (dt_ops.setprop) ? dt_ops.setprop(devp, name, buf, buflen) : -1;
  98 }
  99
 100 static inline int setprop_str(void *devp, const char *name, const char *buf)
 101 {
 102         if (dt_ops.setprop)
 103                 return dt_ops.setprop(devp, name, buf, strlen(buf) + 1);
 104
 105         return -1;
 106 }
 107
 108 static inline void *get_parent(const char *devp)
 109 {
 110         return dt_ops.get_parent ? dt_ops.get_parent(devp) : NULL;
 111 }
 112
 113 static inline void *create_node(const void *parent, const char *name)
 114 {
 115         return dt_ops.create_node ? dt_ops.create_node(parent, name) : NULL;
 116 }
 117
 118
 119 static inline void *find_node_by_prop_value(const void *prev,
 120                                             const char *propname,
 121                                             const char *propval, int proplen)
 122 {
 123         if (dt_ops.find_node_by_prop_value)
 124                 return dt_ops.find_node_by_prop_value(prev, propname,
 125                                                       propval, proplen);
 126
 127         return NULL;
 128 }
 129
 130 static inline void *find_node_by_prop_value_str(const void *prev,
 131                                                 const char *propname,
 132                                                 const char *propval)
 133 {
 134         return find_node_by_prop_value(prev, propname, propval,
 135                                        strlen(propval) + 1);
 136 }
 137
 138 static inline void *find_node_by_devtype(const void *prev,
 139                                          const char *type)
 140 {
 141         return find_node_by_prop_value_str(prev, "device_type", type);
 142 }
 143
 144 static inline void *malloc(u32 size)
 145 {
 146         return (platform_ops.malloc) ? platform_ops.malloc(size) : NULL;
 147 }
 148
 149 static inline void free(void *ptr)
 150 {
 151         if (platform_ops.free)
 152                 platform_ops.free(ptr);
 153 }
 154
 155 static inline void exit(void)
 156 {
 157         if (platform_ops.exit)
 158                 platform_ops.exit();
 159         for(;;);
 160 }
 161 #define fatal(args...) { printf(args); exit(); }
 162
 163
 164 #define BSS_STACK(size) \
 165         static char _bss_stack[size]; \
 166         void *_platform_stack_top = _bss_stack + sizeof(_bss_stack);
 167
 168 #endif /* _PPC_BOOT_OPS_H_ */