release/src-rt-6.x/linux/linux-2.6/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)(unsigned long 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         char *cmdline;
  74         int cmdline_len;
  75 };
  76 extern struct loader_info loader_info;
  77
  78 void start(void);
  79 int ft_init(void *dt_blob, unsigned int max_size, unsigned int max_find_device);
  80 int serial_console_init(void);
  81 int ns16550_console_init(void *devp, struct serial_console_data *scdp);
  82 int mpsc_console_init(void *devp, struct serial_console_data *scdp);
  83 void *simple_alloc_init(char *base, unsigned long heap_size,
  84                         unsigned long granularity, unsigned long max_allocs);
  85 extern void flush_cache(void *, unsigned long);
  86 int dt_xlate_reg(void *node, int res, unsigned long *addr, unsigned long *size);
  87 int dt_xlate_addr(void *node, u32 *buf, int buflen, unsigned long *xlated_addr);
  88
  89 static inline void *finddevice(const char *name)
  90 {
  91         return (dt_ops.finddevice) ? dt_ops.finddevice(name) : NULL;
  92 }
  93
  94 static inline int getprop(void *devp, const char *name, void *buf, int buflen)
  95 {
  96         return (dt_ops.getprop) ? dt_ops.getprop(devp, name, buf, buflen) : -1;
  97 }
  98
  99 static inline int setprop(void *devp, const char *name,
 100                           const void *buf, int buflen)
 101 {
 102         return (dt_ops.setprop) ? dt_ops.setprop(devp, name, buf, buflen) : -1;
 103 }
 104 #define setprop_val(devp, name, val) \
 105         do { \
 106                 typeof(val) x = (val); \
 107                 setprop((devp), (name), &x, sizeof(x)); \
 108         } while (0)
 109
 110 static inline int setprop_str(void *devp, const char *name, const char *buf)
 111 {
 112         if (dt_ops.setprop)
 113                 return dt_ops.setprop(devp, name, buf, strlen(buf) + 1);
 114
 115         return -1;
 116 }
 117
 118 static inline void *get_parent(const char *devp)
 119 {
 120         return dt_ops.get_parent ? dt_ops.get_parent(devp) : NULL;
 121 }
 122
 123 static inline void *create_node(const void *parent, const char *name)
 124 {
 125         return dt_ops.create_node ? dt_ops.create_node(parent, name) : NULL;
 126 }
 127
 128
 129 static inline void *find_node_by_prop_value(const void *prev,
 130                                             const char *propname,
 131                                             const char *propval, int proplen)
 132 {
 133         if (dt_ops.find_node_by_prop_value)
 134                 return dt_ops.find_node_by_prop_value(prev, propname,
 135                                                       propval, proplen);
 136
 137         return NULL;
 138 }
 139
 140 static inline void *find_node_by_prop_value_str(const void *prev,
 141                                                 const char *propname,
 142                                                 const char *propval)
 143 {
 144         return find_node_by_prop_value(prev, propname, propval,
 145                                        strlen(propval) + 1);
 146 }
 147
 148 static inline void *find_node_by_devtype(const void *prev,
 149                                          const char *type)
 150 {
 151         return find_node_by_prop_value_str(prev, "device_type", type);
 152 }
 153
 154 void dt_fixup_memory(u64 start, u64 size);
 155 void dt_fixup_cpu_clocks(u32 cpufreq, u32 tbfreq, u32 busfreq);
 156 void dt_fixup_clock(const char *path, u32 freq);
 157 void __dt_fixup_mac_addresses(u32 startindex, ...);
 158 #define dt_fixup_mac_addresses(...) \
 159         __dt_fixup_mac_addresses(0, __VA_ARGS__, NULL)
 160
 161
 162 static inline void *find_node_by_linuxphandle(const u32 linuxphandle)
 163 {
 164         return find_node_by_prop_value(NULL, "linux,phandle",
 165                         (char *)&linuxphandle, sizeof(u32));
 166 }
 167
 168 static inline void *malloc(unsigned long size)
 169 {
 170         return (platform_ops.malloc) ? platform_ops.malloc(size) : NULL;
 171 }
 172
 173 static inline void free(void *ptr)
 174 {
 175         if (platform_ops.free)
 176                 platform_ops.free(ptr);
 177 }
 178
 179 static inline void exit(void)
 180 {
 181         if (platform_ops.exit)
 182                 platform_ops.exit();
 183         for(;;);
 184 }
 185 #define fatal(args...) { printf(args); exit(); }
 186
 187
 188 #define BSS_STACK(size) \
 189         static char _bss_stack[size]; \
 190         void *_platform_stack_top = _bss_stack + sizeof(_bss_stack);
 191
 192 #endif /* _PPC_BOOT_OPS_H_ */