x86: uv: Add UV reserved page bios call

Add UV bios call to get the address of the reserved page.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

arch/x86/include/asm/uv/bios.h

@@ -35,13 +35,15 @@ enum uv_bios_cmd {
 	UV_BIOS_FREQ_BASE,
 	UV_BIOS_WATCHLIST_ALLOC,
 	UV_BIOS_WATCHLIST_FREE,
-	UV_BIOS_MEMPROTECT
+	UV_BIOS_MEMPROTECT,
+	UV_BIOS_GET_PARTITION_ADDR
 };
 
 /*
  * Status values returned from a BIOS call.
  */
 enum {
+	BIOS_STATUS_MORE_PASSES		=  1,
 	BIOS_STATUS_SUCCESS		=  0,
 	BIOS_STATUS_UNIMPLEMENTED	= -ENOSYS,
 	BIOS_STATUS_EINVAL		= -EINVAL,
@@ -102,6 +104,7 @@ extern int uv_bios_mq_watchlist_alloc(int, void *, unsigned int,
 					unsigned long *);
 extern int uv_bios_mq_watchlist_free(int, int);
 extern s64 uv_bios_change_memprotect(u64, u64, enum uv_memprotect);
+extern s64 uv_bios_reserved_page_pa(u64, u64 *, u64 *, u64 *);
 
 extern void uv_bios_init(void);
 

arch/x86/kernel/bios_uv.c

@@ -142,6 +142,17 @@ uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
 }
 EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
 
+s64
+uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
+{
+	s64 ret;
+
+	ret = uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
+					(u64)addr, buf, (u64)len, 0);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
+
 s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
 {
 	return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,