X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Flinux%2Fefi.h;h=0f461df7686c25c2a9fd227fe5916c03df4038e9;hb=6a77f38946aaee1cd85eeec6cf4229b204c15071;hp=0c5c94ab111269d9a0d7db0d608c42f9aaced8e5;hpb=87fc8d1bb10cd459024a742c6a10961fefcef18f;p=linux-2.6.git

diff --git a/include/linux/efi.h b/include/linux/efi.h
index 0c5c94ab1..0f461df76 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -289,6 +289,7 @@ efi_guid_unparse(efi_guid_t *guid, char *out)
 }
 
 extern void efi_init (void);
+extern void *efi_get_pal_addr (void);
 extern void efi_map_pal_code (void);
 extern void efi_map_memmap(void);
 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
@@ -305,8 +306,29 @@ extern unsigned long __init efi_get_time(void);
 extern int __init efi_set_rtc_mmss(unsigned long nowtime);
 extern struct efi_memory_map memmap;
 
+/**
+ * efi_range_is_wc - check the WC bit on an address range
+ * @start: starting kvirt address
+ * @len: length of range
+ *
+ * Consult the EFI memory map and make sure it's ok to set this range WC.
+ * Returns true or false.
+ */
+static inline int efi_range_is_wc(unsigned long start, unsigned long len)
+{
+	int i;
+
+	for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
+		unsigned long paddr = __pa(start + i);
+		if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
+			return 0;
+	}
+	/* The range checked out */
+	return 1;
+}
+
 #ifdef CONFIG_EFI_PCDP
-extern void __init efi_setup_pcdp_console(char *);
+extern int __init efi_setup_pcdp_console(char *);
 #endif
 
 /*