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 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
 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_ */