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 int dt_get_virtual_reg(void *node, void **addr, int nres); 99 100 static inline void *finddevice(const char *name) 101 { 102 return (dt_ops.finddevice) ? dt_ops.finddevice(name) : NULL; 103 } 104 105 static inline int getprop(void *devp, const char *name, void *buf, int buflen) 106 { 107 return (dt_ops.getprop) ? dt_ops.getprop(devp, name, buf, buflen) : -1; 108 } 109 110 static inline int setprop(void *devp, const char *name, 111 const void *buf, int buflen) 112 { 113 return (dt_ops.setprop) ? dt_ops.setprop(devp, name, buf, buflen) : -1; 114 } 115 #define setprop_val(devp, name, val) \ 116 do { \ 117 typeof(val) x = (val); \ 118 setprop((devp), (name), &x, sizeof(x)); \ 119 } while (0) 120 121 static inline int setprop_str(void *devp, const char *name, const char *buf) 122 { 123 if (dt_ops.setprop) 124 return dt_ops.setprop(devp, name, buf, strlen(buf) + 1); 125 126 return -1; 127 } 128 129 static inline void *get_parent(const char *devp) 130 { 131 return dt_ops.get_parent ? dt_ops.get_parent(devp) : NULL; 132 } 133 134 static inline void *create_node(const void *parent, const char *name) 135 { 136 return dt_ops.create_node ? dt_ops.create_node(parent, name) : NULL; 137 } 138 139 140 static inline void *find_node_by_prop_value(const void *prev, 141 const char *propname, 142 const char *propval, int proplen) 143 { 144 if (dt_ops.find_node_by_prop_value) 145 return dt_ops.find_node_by_prop_value(prev, propname, 146 propval, proplen); 147 148 return NULL; 149 } 150 151 static inline void *find_node_by_prop_value_str(const void *prev, 152 const char *propname, 153 const char *propval) 154 { 155 return find_node_by_prop_value(prev, propname, propval, 156 strlen(propval) + 1); 157 } 158 159 static inline void *find_node_by_devtype(const void *prev, 160 const char *type) 161 { 162 return find_node_by_prop_value_str(prev, "device_type", type); 163 } 164 165 static inline void *find_node_by_alias(const char *alias) 166 { 167 void *devp = finddevice("/aliases"); 168 169 if (devp) { 170 char path[MAX_PATH_LEN]; 171 if (getprop(devp, alias, path, MAX_PATH_LEN) > 0) 172 return finddevice(path); 173 } 174 175 return NULL; 176 } 177 178 static inline void *find_node_by_compatible(const void *prev, 179 const char *compat) 180 { 181 if (dt_ops.find_node_by_compatible) 182 return dt_ops.find_node_by_compatible(prev, compat); 183 184 return NULL; 185 } 186 187 void dt_fixup_memory(u64 start, u64 size); 188 void dt_fixup_cpu_clocks(u32 cpufreq, u32 tbfreq, u32 busfreq); 189 void dt_fixup_clock(const char *path, u32 freq); 190 void dt_fixup_mac_address_by_alias(const char *alias, const u8 *addr); 191 void dt_fixup_mac_address(u32 index, const u8 *addr); 192 void __dt_fixup_mac_addresses(u32 startindex, ...); 193 #define dt_fixup_mac_addresses(...) \ 194 __dt_fixup_mac_addresses(0, __VA_ARGS__, NULL) 195 196 197 static inline void *find_node_by_linuxphandle(const u32 linuxphandle) 198 { 199 return find_node_by_prop_value(NULL, "linux,phandle", 200 (char *)&linuxphandle, sizeof(u32)); 201 } 202 203 static inline char *get_path(const void *phandle, char *buf, int len) 204 { 205 if (dt_ops.get_path) 206 return dt_ops.get_path(phandle, buf, len); 207 208 return NULL; 209 } 210 211 static inline void *malloc(unsigned long size) 212 { 213 return (platform_ops.malloc) ? platform_ops.malloc(size) : NULL; 214 } 215 216 static inline void free(void *ptr) 217 { 218 if (platform_ops.free) 219 platform_ops.free(ptr); 220 } 221 222 static inline void exit(void) 223 { 224 if (platform_ops.exit) 225 platform_ops.exit(); 226 for(;;); 227 } 228 #define fatal(args...) { printf(args); exit(); } 229 230 231 #define BSS_STACK(size) \ 232 static char _bss_stack[size]; \ 233 void *_platform_stack_top = _bss_stack + sizeof(_bss_stack); 234 235 extern unsigned long timebase_period_ns; 236 void udelay(long delay); 237 238 extern char _start[]; 239 extern char __bss_start[]; 240 extern char _end[]; 241 extern char _vmlinux_start[]; 242 extern char _vmlinux_end[]; 243 extern char _initrd_start[]; 244 extern char _initrd_end[]; 245 extern char _dtb_start[]; 246 extern char _dtb_end[]; 247 248 static inline __attribute__((const)) 249 int __ilog2_u32(u32 n) 250 { 251 int bit; 252 asm ("cntlzw %0,%1" : "=r" (bit) : "r" (n)); 253 return 31 - bit; 254 } 255 256 #endif /* _PPC_BOOT_OPS_H_ */ 257