Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm64 / include / asm / fixmap.h

diff --git a/kernel/arch/arm64/include/asm/fixmap.h b/kernel/arch/arm64/include/asm/fixmap.h
new file mode 100644 (file)
index 0000000..95e6b6d
--- /dev/null
+++ b/kernel/arch/arm64/include/asm/fixmap.h
@@ -0,0 +1,73 @@
+/*
+ * fixmap.h: compile-time virtual memory allocation
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1998 Ingo Molnar
+ * Copyright (C) 2013 Mark Salter <msalter@redhat.com>
+ *
+ * Adapted from arch/x86_64 version.
+ *
+ */
+
+#ifndef _ASM_ARM64_FIXMAP_H
+#define _ASM_ARM64_FIXMAP_H
+
+#ifndef __ASSEMBLY__
+#include <linux/kernel.h>
+#include <asm/page.h>
+
+/*
+ * Here we define all the compile-time 'special' virtual
+ * addresses. The point is to have a constant address at
+ * compile time, but to set the physical address only
+ * in the boot process.
+ *
+ * These 'compile-time allocated' memory buffers are
+ * page-sized. Use set_fixmap(idx,phys) to associate
+ * physical memory with fixmap indices.
+ *
+ */
+enum fixed_addresses {
+       FIX_HOLE,
+       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 FIX_BTMAPS_SLOTS       7
+#define TOTAL_FIX_BTMAPS       (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)
+
+       FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
+       FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1,
+       __end_of_fixed_addresses
+};
+
+#define FIXADDR_SIZE   (__end_of_permanent_fixed_addresses << PAGE_SHIFT)
+#define FIXADDR_START  (FIXADDR_TOP - FIXADDR_SIZE)
+
+#define FIXMAP_PAGE_IO     __pgprot(PROT_DEVICE_nGnRE)
+
+void __init early_fixmap_init(void);
+
+#define __early_set_fixmap __set_fixmap
+
+#define __late_set_fixmap __set_fixmap
+#define __late_clear_fixmap(idx) __set_fixmap((idx), 0, FIXMAP_PAGE_CLEAR)
+
+extern void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot);
+
+#include <asm-generic/fixmap.h>
+
+#endif /* !__ASSEMBLY__ */
+#endif /* _ASM_ARM64_FIXMAP_H */