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 void *(*find_node_by_compatible)(const void *prev, 50 const char *compat); 51 unsigned long (*finalize)(void); 52 char *(*get_path)(const void *phandle, char *buf, int len); 53 }; 54 extern struct dt_ops dt_ops; 55 56 /* Console operations */ 57 struct console_ops { 58 int (*open)(void); 59 void (*write)(const char *buf, int len); 60 void (*edit_cmdline)(char *buf, int len); 61 void (*close)(void); 62 void *data; 63 }; 64 extern struct console_ops console_ops; 65 66 /* Serial console operations */ 67 struct serial_console_data { 68 int (*open)(void); 69 void (*putc)(unsigned char c); 70 unsigned char (*getc)(void); 71 u8 (*tstc)(void); 72 void (*close)(void); 73 }; 74 75 struct loader_info { 76 void *promptr; 77 unsigned long initrd_addr, initrd_size; 78 char *cmdline; 79 int cmdline_len; 80 }; 81 extern struct loader_info loader_info; 82 83 void start(void); 84 void fdt_init(void *blob); 85 int serial_console_init(void); 86 int ns16550_console_init(void *devp, struct serial_console_data *scdp); 87 int mpsc_console_init(void *devp, struct serial_console_data *scdp); 88 int cpm_console_init(void *devp, struct serial_console_data *scdp); 89 int mpc5200_psc_console_init(void *devp, struct serial_console_data *scdp); 90 int uartlite_console_init(void *devp, struct serial_console_data *scdp); 91 void *simple_alloc_init(char *base, unsigned long heap_size, 92 unsigned long granularity, unsigned long max_allocs); 93 extern void flush_cache(void *, unsigned long); 94 int dt_xlate_reg(void *node, int res, unsigned long *addr, unsigned long *size); 95 int dt_xlate_addr(void *node, u32 *buf, int buflen, unsigned long *xlated_addr); 96 int dt_is_compatible(void *node, const char *compat); 97 void dt_get_reg_format(void *node, u32 *naddr, u32 *nsize); 98 99 static inline void *finddevice(const char *name) 100 { 101 return (dt_ops.finddevice) ? dt_ops.finddevice(name) : NULL; 102 } 103 104 static inline int getprop(void *devp, const char *name, void *buf, int buflen) 105 { 106 return (dt_ops.getprop) ? dt_ops.getprop(devp, name, buf, buflen) : -1; 107 } 108 109 static inline int setprop(void *devp, const char *name, 110 const void *buf, int buflen) 111 { 112 return (dt_ops.setprop) ? dt_ops.setprop(devp, name, buf, buflen) : -1; 113 } 114 #define setprop_val(devp, name, val) \ 115 do { \ 116 typeof(val) x = (val); \ 117 setprop((devp), (name), &x, sizeof(x)); \ 118 } while (0) 119 120 static inline int setprop_str(void *devp, const char *name, const char *buf) 121 { 122 if (dt_ops.setprop) 123 return dt_ops.setprop(devp, name, buf, strlen(buf) + 1); 124 125 return -1; 126 } 127 128 static inline void *get_parent(const char *devp) 129 { 130 return dt_ops.get_parent ? dt_ops.get_parent(devp) : NULL; 131 } 132 133 static inline void *create_node(const void *parent, const char *name) 134 { 135 return dt_ops.create_node ? dt_ops.create_node(parent, name) : NULL; 136 } 137 138 139 static inline void *find_node_by_prop_value(const void *prev, 140 const char *propname, 141 const char *propval, int proplen) 142 { 143 if (dt_ops.find_node_by_prop_value) 144 return dt_ops.find_node_by_prop_value(prev, propname, 145 propval, proplen); 146 147 return NULL; 148 } 149 150 static inline void *find_node_by_prop_value_str(const void *prev, 151 const char *propname, 152 const char *propval) 153 { 154 return find_node_by_prop_value(prev, propname, propval, 155 strlen(propval) + 1); 156 } 157 158 static inline void *find_node_by_devtype(const void *prev, 159 const char *type) 160 { 161 return find_node_by_prop_value_str(prev, "device_type", type); 162 } 163 164 static inline void *find_node_by_alias(const char *alias) 165 { 166 void *devp = finddevice("/aliases"); 167 168 if (devp) { 169 char path[MAX_PATH_LEN]; 170 if (getprop(devp, alias, path, MAX_PATH_LEN) > 0) 171 return finddevice(path); 172 } 173 174 return NULL; 175 } 176 177 static inline void *find_node_by_compatible(const void *prev, 178 const char *compat) 179 { 180 if (dt_ops.find_node_by_compatible) 181 return dt_ops.find_node_by_compatible(prev, compat); 182 183 return NULL; 184 } 185 186 void dt_fixup_memory(u64 start, u64 size); 187 void dt_fixup_cpu_clocks(u32 cpufreq, u32 tbfreq, u32 busfreq); 188 void dt_fixup_clock(const char *path, u32 freq); 189 void dt_fixup_mac_address_by_alias(const char *alias, const u8 *addr); 190 void dt_fixup_mac_address(u32 index, const u8 *addr); 191 void __dt_fixup_mac_addresses(u32 startindex, ...); 192 #define dt_fixup_mac_addresses(...) \ 193 __dt_fixup_mac_addresses(0, __VA_ARGS__, NULL) 194 195 196 static inline void *find_node_by_linuxphandle(const u32 linuxphandle) 197 { 198 return find_node_by_prop_value(NULL, "linux,phandle", 199 (char *)&linuxphandle, sizeof(u32)); 200 } 201 202 static inline char *get_path(const void *phandle, char *buf, int len) 203 { 204 if (dt_ops.get_path) 205 return dt_ops.get_path(phandle, buf, len); 206 207 return NULL; 208 } 209 210 static inline void *malloc(unsigned long size) 211 { 212 return (platform_ops.malloc) ? platform_ops.malloc(size) : NULL; 213 } 214 215 static inline void free(void *ptr) 216 { 217 if (platform_ops.free) 218 platform_ops.free(ptr); 219 } 220 221 static inline void exit(void) 222 { 223 if (platform_ops.exit) 224 platform_ops.exit(); 225 for(;;); 226 } 227 #define fatal(args...) { printf(args); exit(); } 228 229 230 #define BSS_STACK(size) \ 231 static char _bss_stack[size]; \ 232 void *_platform_stack_top = _bss_stack + sizeof(_bss_stack); 233 234 extern unsigned long timebase_period_ns; 235 void udelay(long delay); 236 237 extern char _start[]; 238 extern char __bss_start[]; 239 extern char _end[]; 240 extern char _vmlinux_start[]; 241 extern char _vmlinux_end[]; 242 extern char _initrd_start[]; 243 extern char _initrd_end[]; 244 extern char _dtb_start[]; 245 extern char _dtb_end[]; 246 247 static inline __attribute__((const)) 248 int __ilog2_u32(u32 n) 249 { 250 int bit; 251 asm ("cntlzw %0,%1" : "=r" (bit) : "r" (n)); 252 return 31 - bit; 253 } 254 255 #endif /* _PPC_BOOT_OPS_H_ */ 256