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Diffstat (limited to 'kernel/arch/x86/include/asm/olpc_ofw.h')
-rw-r--r--kernel/arch/x86/include/asm/olpc_ofw.h37
1 files changed, 37 insertions, 0 deletions
diff --git a/kernel/arch/x86/include/asm/olpc_ofw.h b/kernel/arch/x86/include/asm/olpc_ofw.h
new file mode 100644
index 000000000..24487712e
--- /dev/null
+++ b/kernel/arch/x86/include/asm/olpc_ofw.h
@@ -0,0 +1,37 @@
+#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 */