Line data    Source code

       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           1 : static inline void olpc_ofw_detect(void) { }
      34           1 : 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 */