This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-um / ldt-x86_64.h

diff --git a/include/asm-um/ldt-x86_64.h b/include/asm-um/ldt-x86_64.h
new file mode 100644 (file)
index 0000000..96b35aa
--- /dev/null
+++ b/include/asm-um/ldt-x86_64.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2004 Fujitsu Siemens Computers GmbH
+ * Licensed under the GPL
+ *
+ * Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
+ */
+
+#ifndef __ASM_LDT_X86_64_H
+#define __ASM_LDT_X86_64_H
+
+#include "asm/semaphore.h"
+#include "asm/arch/ldt.h"
+
+struct mmu_context_skas;
+extern void ldt_host_info(void);
+extern long init_new_ldt(struct mmu_context_skas * to_mm,
+                        struct mmu_context_skas * from_mm);
+extern void free_ldt(struct mmu_context_skas * mm);
+
+#define LDT_PAGES_MAX \
+       ((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE)
+#define LDT_ENTRIES_PER_PAGE \
+       (PAGE_SIZE/LDT_ENTRY_SIZE)
+#define LDT_DIRECT_ENTRIES \
+       ((LDT_PAGES_MAX*sizeof(void *))/LDT_ENTRY_SIZE)
+
+struct ldt_entry {
+       __u32 a;
+       __u32 b;
+};
+
+typedef struct uml_ldt {
+       int entry_count;
+       struct semaphore semaphore;
+       union {
+               struct ldt_entry * pages[LDT_PAGES_MAX];
+               struct ldt_entry entries[LDT_DIRECT_ENTRIES];
+       } u;
+} uml_ldt_t;
+
+/*
+ * macros stolen from include/asm-x86_64/desc.h
+ */
+#define LDT_entry_a(info) \
+       ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
+
+/* Don't allow setting of the lm bit. It is useless anyways because
+ * 64bit system calls require __USER_CS. */
+#define LDT_entry_b(info) \
+       (((info)->base_addr & 0xff000000) | \
+       (((info)->base_addr & 0x00ff0000) >> 16) | \
+       ((info)->limit & 0xf0000) | \
+       (((info)->read_exec_only ^ 1) << 9) | \
+       ((info)->contents << 10) | \
+       (((info)->seg_not_present ^ 1) << 15) | \
+       ((info)->seg_32bit << 22) | \
+       ((info)->limit_in_pages << 23) | \
+       ((info)->useable << 20) | \
+       /* ((info)->lm << 21) | */ \
+       0x7000)
+
+#define LDT_empty(info) (\
+       (info)->base_addr       == 0    && \
+       (info)->limit           == 0    && \
+       (info)->contents        == 0    && \
+       (info)->read_exec_only  == 1    && \
+       (info)->seg_32bit       == 0    && \
+       (info)->limit_in_pages  == 0    && \
+       (info)->seg_not_present == 1    && \
+       (info)->useable         == 0    && \
+       (info)->lm              == 0)
+
+#endif