1 #ifndef _ASM_X86_OLPC_OFW_H
2 #define _ASM_X86_OLPC_OFW_H
3
4 /* index into the page table containing the entry OFW occupies */
5 #define OLPC_OFW_PDE_NR 1022
6
7 #define OLPC_OFW_SIG 0x2057464F /* aka "OFW " */
8
9 #ifdef CONFIG_OLPC
10
11 extern bool olpc_ofw_is_installed(void);
12
13 /* run an OFW command by calling into the firmware */
14 #define olpc_ofw(name, args, res) \
15 __olpc_ofw((name), ARRAY_SIZE(args), args, ARRAY_SIZE(res), res)
16
17 extern int __olpc_ofw(const char *name, int nr_args, const void **args, int nr_res,
18 void **res);
19
20 /* determine whether OFW is available and lives in the proper memory */
21 extern void olpc_ofw_detect(void);
22
23 /* install OFW's pde permanently into the kernel's pgtable */
24 extern void setup_olpc_ofw_pgd(void);
25
26 /* check if OFW was detected during boot */
27 extern bool olpc_ofw_present(void);
28
29 #else /* !CONFIG_OLPC */
olpc_ofw_detect(void)30 static inline void olpc_ofw_detect(void) { }
setup_olpc_ofw_pgd(void)31 static inline void setup_olpc_ofw_pgd(void) { }
32 #endif /* !CONFIG_OLPC */
33
34 #ifdef CONFIG_OF_PROMTREE
35 extern void olpc_dt_build_devicetree(void);
36 #else
olpc_dt_build_devicetree(void)37 static inline void olpc_dt_build_devicetree(void) { }
38 #endif
39
40 #endif /* _ASM_X86_OLPC_OFW_H */
41