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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
fd699c76 AS |
2 | #ifndef _ASM_X86_OLPC_OFW_H |
3 | #define _ASM_X86_OLPC_OFW_H | |
4 | ||
5 | /* index into the page table containing the entry OFW occupies */ | |
6 | #define OLPC_OFW_PDE_NR 1022 | |
7 | ||
8 | #define OLPC_OFW_SIG 0x2057464F /* aka "OFW " */ | |
9 | ||
939d578e TG |
10 | #ifdef CONFIG_OLPC |
11 | ||
c10d1e26 AS |
12 | extern bool olpc_ofw_is_installed(void); |
13 | ||
fd699c76 AS |
14 | /* run an OFW command by calling into the firmware */ |
15 | #define olpc_ofw(name, args, res) \ | |
16 | __olpc_ofw((name), ARRAY_SIZE(args), args, ARRAY_SIZE(res), res) | |
17 | ||
54e5bc02 | 18 | extern int __olpc_ofw(const char *name, int nr_args, const void **args, int nr_res, |
fd699c76 AS |
19 | void **res); |
20 | ||
21 | /* determine whether OFW is available and lives in the proper memory */ | |
22 | extern void olpc_ofw_detect(void); | |
23 | ||
24 | /* install OFW's pde permanently into the kernel's pgtable */ | |
25 | extern void setup_olpc_ofw_pgd(void); | |
26 | ||
3e3c4860 DD |
27 | /* check if OFW was detected during boot */ |
28 | extern bool olpc_ofw_present(void); | |
29 | ||
45bb1674 DD |
30 | extern void olpc_dt_build_devicetree(void); |
31 | ||
939d578e TG |
32 | #else /* !CONFIG_OLPC */ |
33 | static inline void olpc_ofw_detect(void) { } | |
34 | static inline void setup_olpc_ofw_pgd(void) { } | |
c10d1e26 | 35 | static inline void olpc_dt_build_devicetree(void) { } |
45bb1674 | 36 | #endif /* !CONFIG_OLPC */ |
c10d1e26 | 37 | |
fd699c76 | 38 | #endif /* _ASM_X86_OLPC_OFW_H */ |