* Copyright (C) 1998 Ingo Molnar
* Copyright (C) 2013 Mark Salter <msalter@redhat.com>
*
- * Adapted from arch/x86_64 version.
+ * Adapted from arch/x86 version.
*
*/
#ifndef __ASSEMBLY__
#include <linux/kernel.h>
+#include <linux/sizes.h>
+#include <asm/boot.h>
#include <asm/page.h>
/*
*/
enum fixed_addresses {
FIX_HOLE,
+
+ /*
+ * Reserve a virtual window for the FDT that is 2 MB larger than the
+ * maximum supported size, and put it at the top of the fixmap region.
+ * The additional space ensures that any FDT that does not exceed
+ * MAX_FDT_SIZE can be mapped regardless of whether it crosses any
+ * 2 MB alignment boundaries.
+ *
+ * Keep this at the top so it remains 2 MB aligned.
+ */
+#define FIX_FDT_SIZE (MAX_FDT_SIZE + SZ_2M)
+ FIX_FDT_END,
+ FIX_FDT = FIX_FDT_END + FIX_FDT_SIZE / PAGE_SIZE - 1,
+
FIX_EARLYCON_MEM_BASE,
FIX_TEXT_POKE0,
__end_of_permanent_fixed_addresses,
* Temporary boot-time mappings, used by early_ioremap(),
* before ioremap() is functional.
*/
-#ifdef CONFIG_ARM64_64K_PAGES
-#define NR_FIX_BTMAPS 4
-#else
-#define NR_FIX_BTMAPS 64
-#endif
+#define NR_FIX_BTMAPS (SZ_256K / PAGE_SIZE)
#define FIX_BTMAPS_SLOTS 7
#define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)