| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 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 | |
| 10 | #ifdef CONFIG_OLPC |
| 11 | |
| 12 | extern bool olpc_ofw_is_installed(void); |
| 13 | |
| 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 | |
| 18 | extern int __olpc_ofw(const char *name, int nr_args, const void **args, int nr_res, |
| 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 | |
| 27 | /* check if OFW was detected during boot */ |
| 28 | extern bool olpc_ofw_present(void); |
| 29 | |
| 30 | extern void olpc_dt_build_devicetree(void); |
| 31 | |
| 32 | #else /* !CONFIG_OLPC */ |
| 33 | static inline void olpc_ofw_detect(void) { } |
| 34 | static inline void setup_olpc_ofw_pgd(void) { } |
| 35 | static inline void olpc_dt_build_devicetree(void) { } |
| 36 | #endif /* !CONFIG_OLPC */ |
| 37 | |
| 38 | #endif /* _ASM_X86_OLPC_OFW_H */ |