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         void *(*get_parent)(const void *phandle);
  44         /* The node must not already exist. */
  45         void *(*create_node)(const void *parent, const char *name);
  46         void *(*find_node_by_prop_value)(const void *prev,
  47                                          const char *propname,
  48                                          const char *propval, int proplen);
  49         unsigned long (*finalize)(void);
  50         char *(*get_path)(const void *phandle, char *buf, int len);
  51 };
  52 extern struct dt_ops dt_ops;
  53
  54 /* Console operations */
  55 struct console_ops {
  56         int     (*open)(void);
  57         void    (*write)(const char *buf, int len);
  58         void    (*edit_cmdline)(char *buf, int len);
  59         void    (*close)(void);
  60         void    *data;
  61 };
  62 extern struct console_ops console_ops;
  63
  64 /* Serial console operations */
  65 struct serial_console_data {
  66         int             (*open)(void);
  67         void            (*putc)(unsigned char c);
  68         unsigned char   (*getc)(void);
  69         u8              (*tstc)(void);
  70         void            (*close)(void);
  71 };
  72
  73 struct loader_info {
  74         void *promptr;
  75         unsigned long initrd_addr, initrd_size;
  76         char *cmdline;
  77         int cmdline_len;
  78 };
  79 extern struct loader_info loader_info;
  80
  81 void start(void);
  82 int ft_init(void *dt_blob, unsigned int max_size, unsigned int max_find_device);
  83 int serial_console_init(void);
  84 int ns16550_console_init(void *devp, struct serial_console_data *scdp);
  85 int mpsc_console_init(void *devp, struct serial_console_data *scdp);
  86 int cpm_console_init(void *devp, struct serial_console_data *scdp);
  87 int mpc5200_psc_console_init(void *devp, struct serial_console_data *scdp);
  88 int uartlite_console_init(void *devp, struct serial_console_data *scdp);
  89 void *simple_alloc_init(char *base, unsigned long heap_size,
  90                         unsigned long granularity, unsigned long max_allocs);
  91 extern void flush_cache(void *, unsigned long);
  92 int dt_xlate_reg(void *node, int res, unsigned long *addr, unsigned long *size);
  93 int dt_xlate_addr(void *node, u32 *buf, int buflen, unsigned long *xlated_addr);
  94 int dt_is_compatible(void *node, const char *compat);
  95 void dt_get_reg_format(void *node, u32 *naddr, u32 *nsize);
  96
  97 static inline void *finddevice(const char *name)
  98 {
  99         return (dt_ops.finddevice) ? dt_ops.finddevice(name) : NULL;
 100 }
 101
 102 static inline int getprop(void *devp, const char *name, void *buf, int buflen)
 103 {
 104         return (dt_ops.getprop) ? dt_ops.getprop(devp, name, buf, buflen) : -1;
 105 }
 106
 107 static inline int setprop(void *devp, const char *name,
 108                           const void *buf, int buflen)
 109 {
 110         return (dt_ops.setprop) ? dt_ops.setprop(devp, name, buf, buflen) : -1;
 111 }
 112 #define setprop_val(devp, name, val) \
 113         do { \
 114                 typeof(val) x = (val); \
 115                 setprop((devp), (name), &x, sizeof(x)); \
 116         } while (0)
 117
 118 static inline int setprop_str(void *devp, const char *name, const char *buf)
 119 {
 120         if (dt_ops.setprop)
 121                 return dt_ops.setprop(devp, name, buf, strlen(buf) + 1);
 122
 123         return -1;
 124 }
 125
 126 static inline void *get_parent(const char *devp)
 127 {
 128         return dt_ops.get_parent ? dt_ops.get_parent(devp) : NULL;
 129 }
 130
 131 static inline void *create_node(const void *parent, const char *name)
 132 {
 133         return dt_ops.create_node ? dt_ops.create_node(parent, name) : NULL;
 134 }
 135
 136
 137 static inline void *find_node_by_prop_value(const void *prev,
 138                                             const char *propname,
 139                                             const char *propval, int proplen)
 140 {
 141         if (dt_ops.find_node_by_prop_value)
 142                 return dt_ops.find_node_by_prop_value(prev, propname,
 143                                                       propval, proplen);
 144
 145         return NULL;
 146 }
 147
 148 static inline void *find_node_by_prop_value_str(const void *prev,
 149                                                 const char *propname,
 150                                                 const char *propval)
 151 {
 152         return find_node_by_prop_value(prev, propname, propval,
 153                                        strlen(propval) + 1);
 154 }
 155
 156 static inline void *find_node_by_devtype(const void *prev,
 157                                          const char *type)
 158 {
 159         return find_node_by_prop_value_str(prev, "device_type", type);
 160 }
 161
 162 void dt_fixup_memory(u64 start, u64 size);
 163 void dt_fixup_cpu_clocks(u32 cpufreq, u32 tbfreq, u32 busfreq);
 164 void dt_fixup_clock(const char *path, u32 freq);
 165 void dt_fixup_mac_address(u32 index, const u8 *addr);
 166 void __dt_fixup_mac_addresses(u32 startindex, ...);
 167 #define dt_fixup_mac_addresses(...) \
 168         __dt_fixup_mac_addresses(0, __VA_ARGS__, NULL)
 169
 170
 171 static inline void *find_node_by_linuxphandle(const u32 linuxphandle)
 172 {
 173         return find_node_by_prop_value(NULL, "linux,phandle",
 174                         (char *)&linuxphandle, sizeof(u32));
 175 }
 176
 177 static inline char *get_path(const void *phandle, char *buf, int len)
 178 {
 179         if (dt_ops.get_path)
 180                 return dt_ops.get_path(phandle, buf, len);
 181
 182         return NULL;
 183 }
 184
 185 static inline void *malloc(unsigned long size)
 186 {
 187         return (platform_ops.malloc) ? platform_ops.malloc(size) : NULL;
 188 }
 189
 190 static inline void free(void *ptr)
 191 {
 192         if (platform_ops.free)
 193                 platform_ops.free(ptr);
 194 }
 195
 196 static inline void exit(void)
 197 {
 198         if (platform_ops.exit)
 199                 platform_ops.exit();
 200         for(;;);
 201 }
 202 #define fatal(args...) { printf(args); exit(); }
 203
 204
 205 #define BSS_STACK(size) \
 206         static char _bss_stack[size]; \
 207         void *_platform_stack_top = _bss_stack + sizeof(_bss_stack);
 208
 209 extern unsigned long timebase_period_ns;
 210 void udelay(long delay);
 211
 212 extern char _start[];
 213 extern char __bss_start[];
 214 extern char _end[];
 215 extern char _vmlinux_start[];
 216 extern char _vmlinux_end[];
 217 extern char _initrd_start[];
 218 extern char _initrd_end[];
 219 extern char _dtb_start[];
 220 extern char _dtb_end[];
 221
 222 static inline __attribute__((const))
 223 int __ilog2_u32(u32 n)
 224 {
 225         int bit;
 226         asm ("cntlzw %0,%1" : "=r" (bit) : "r" (n));
 227         return 31 - bit;
 228 }
 229
 230 #endif /* _PPC_BOOT_OPS_H_ */