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authorAl Viro <viro@zeniv.linux.org.uk>2008-08-18 01:13:17 +0200
committerH. Peter Anvin <hpa@zytor.com>2008-10-23 07:55:19 +0200
commit8ede0bdb63305d3353efd97e9af6210afb05734e (patch)
treea9500a323d0a2dcadca43c23b5c20186f6d9b724 /include/asm-um/fixmap.h
parentx86, um: take arch/um/include/* out of the way (diff)
downloadlinux-8ede0bdb63305d3353efd97e9af6210afb05734e.tar.xz
linux-8ede0bdb63305d3353efd97e9af6210afb05734e.zip
x86, um: initial part of asm-um move
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'include/asm-um/fixmap.h')
-rw-r--r--include/asm-um/fixmap.h98
1 files changed, 0 insertions, 98 deletions
diff --git a/include/asm-um/fixmap.h b/include/asm-um/fixmap.h
deleted file mode 100644
index 9d2be52b8655..000000000000
--- a/include/asm-um/fixmap.h
+++ /dev/null
@@ -1,98 +0,0 @@
-#ifndef __UM_FIXMAP_H
-#define __UM_FIXMAP_H
-
-#include <asm/processor.h>
-#include <asm/system.h>
-#include <asm/kmap_types.h>
-#include <asm/archparam.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. We allocate these special addresses
- * from the end of virtual memory (0xfffff000) backwards.
- * Also this lets us do fail-safe vmalloc(), we
- * can guarantee that these special addresses and
- * vmalloc()-ed addresses never overlap.
- *
- * these 'compile-time allocated' memory buffers are
- * fixed-size 4k pages. (or larger if used with an increment
- * highger than 1) use fixmap_set(idx,phys) to associate
- * physical memory with fixmap indices.
- *
- * TLB entries of such buffers will not be flushed across
- * task switches.
- */
-
-/*
- * on UP currently we will have no trace of the fixmap mechanizm,
- * no page table allocations, etc. This might change in the
- * future, say framebuffers for the console driver(s) could be
- * fix-mapped?
- */
-enum fixed_addresses {
-#ifdef CONFIG_HIGHMEM
- FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */
- FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1,
-#endif
- __end_of_fixed_addresses
-};
-
-extern void __set_fixmap (enum fixed_addresses idx,
- unsigned long phys, pgprot_t flags);
-
-#define set_fixmap(idx, phys) \
- __set_fixmap(idx, phys, PAGE_KERNEL)
-/*
- * Some hardware wants to get fixmapped without caching.
- */
-#define set_fixmap_nocache(idx, phys) \
- __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
-/*
- * used by vmalloc.c.
- *
- * Leave one empty page between vmalloc'ed areas and
- * the start of the fixmap, and leave one page empty
- * at the top of mem..
- */
-
-#define FIXADDR_TOP (TASK_SIZE - 2 * PAGE_SIZE)
-#define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT)
-#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
-
-#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
-#define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT)
-
-extern void __this_fixmap_does_not_exist(void);
-
-/*
- * 'index to address' translation. If anyone tries to use the idx
- * directly without tranlation, we catch the bug with a NULL-deference
- * kernel oops. Illegal ranges of incoming indices are caught too.
- */
-static inline unsigned long fix_to_virt(const unsigned int idx)
-{
- /*
- * this branch gets completely eliminated after inlining,
- * except when someone tries to use fixaddr indices in an
- * illegal way. (such as mixing up address types or using
- * out-of-range indices).
- *
- * If it doesn't get removed, the linker will complain
- * loudly with a reasonably clear error message..
- */
- if (idx >= __end_of_fixed_addresses)
- __this_fixmap_does_not_exist();
-
- return __fix_to_virt(idx);
-}
-
-static inline unsigned long virt_to_fix(const unsigned long vaddr)
-{
- BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
- return __virt_to_fix(vaddr);
-}
-
-#endif