1 files changed, 101 insertions, 0 deletions
diff --git a/xenolinux-2.4.24-sparse/include/asm-xeno/fixmap.h b/xenolinux-2.4.24-sparse/include/asm-xeno/fixmap.h
new file mode 100644
index 0000000000..2441b01d4e
--- /dev/null
+++ b/xenolinux-2.4.24-sparse/include/asm-xeno/fixmap.h
@@ -0,0 +1,101 @@
+/*
+ * 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
+ *
+ * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
+ */
+
+#ifndef _ASM_FIXMAP_H
+#define _ASM_FIXMAP_H
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <asm/apicdef.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.
+ */
+
+enum fixed_addresses {
+#ifdef CONFIG_HIGHMEM_XXX
+	FIX_KMAP_BEGIN,	/* reserved pte's for temporary kernel mappings */
+	FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1,
+#endif
+	FIX_BLKRING_BASE,
+	FIX_NETRING0_BASE,
+	FIX_NETRING1_BASE,
+	FIX_NETRING2_BASE,
+	FIX_NETRING3_BASE,
+        FIX_SHARED_INFO,
+
+#ifdef CONFIG_VGA_CONSOLE
+#define NR_FIX_BTMAPS   32  /* 128KB For the Dom0 VGA Console A0000-C0000 */
+#else
+#define NR_FIX_BTMAPS   1   /* in case anyone wants it in future... */
+#endif
+        FIX_BTMAP_END,
+        FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS - 1,
+	/* our bt_ioremap is permanent, unlike other architectures */
+	
+	__end_of_permanent_fixed_addresses,
+	__end_of_fixed_addresses = __end_of_permanent_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)
+
+extern void clear_fixmap(enum fixed_addresses idx);
+
+/*
+ * 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   (HYPERVISOR_VIRT_START - 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))
+
+/*
+ * '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(unsigned int idx)
+{
+        return __fix_to_virt(idx);
+}
+
+#endif