| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _ASM_X86_OLPC_OFW_H |
| #define _ASM_X86_OLPC_OFW_H |
| |
| /* index into the page table containing the entry OFW occupies */ |
| #define OLPC_OFW_PDE_NR 1022 |
| |
| #define OLPC_OFW_SIG 0x2057464F /* aka "OFW " */ |
| |
| #ifdef CONFIG_OLPC |
| |
| extern bool olpc_ofw_is_installed(void); |
| |
| /* run an OFW command by calling into the firmware */ |
| #define olpc_ofw(name, args, res) \ |
| __olpc_ofw((name), ARRAY_SIZE(args), args, ARRAY_SIZE(res), res) |
| |
| extern int __olpc_ofw(const char *name, int nr_args, const void **args, int nr_res, |
| void **res); |
| |
| /* determine whether OFW is available and lives in the proper memory */ |
| extern void olpc_ofw_detect(void); |
| |
| /* install OFW's pde permanently into the kernel's pgtable */ |
| extern void setup_olpc_ofw_pgd(void); |
| |
| /* check if OFW was detected during boot */ |
| extern bool olpc_ofw_present(void); |
| |
| extern void olpc_dt_build_devicetree(void); |
| |
| #else /* !CONFIG_OLPC */ |
| static inline void olpc_ofw_detect(void) { } |
| static inline void setup_olpc_ofw_pgd(void) { } |
| static inline void olpc_dt_build_devicetree(void) { } |
| #endif /* !CONFIG_OLPC */ |
| |
| #endif /* _ASM_X86_OLPC_OFW_H */ |
