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72 lines
1.6 KiB
72 lines
1.6 KiB
/* |
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* Copyright (C) 2004 Fujitsu Siemens Computers GmbH |
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* Licensed under the GPL |
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* |
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* Author: Bodo Stroesser <[email protected]> |
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*/ |
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#ifndef __ASM_LDT_H |
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#define __ASM_LDT_H |
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#include <linux/mutex.h> |
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#include <asm/ldt.h> |
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extern void ldt_host_info(void); |
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#define LDT_PAGES_MAX \ |
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((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE) |
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#define LDT_ENTRIES_PER_PAGE \ |
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(PAGE_SIZE/LDT_ENTRY_SIZE) |
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#define LDT_DIRECT_ENTRIES \ |
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((LDT_PAGES_MAX*sizeof(void *))/LDT_ENTRY_SIZE) |
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struct ldt_entry { |
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__u32 a; |
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__u32 b; |
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}; |
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typedef struct uml_ldt { |
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int entry_count; |
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struct mutex lock; |
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union { |
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struct ldt_entry * pages[LDT_PAGES_MAX]; |
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struct ldt_entry entries[LDT_DIRECT_ENTRIES]; |
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} u; |
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} uml_ldt_t; |
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#define LDT_entry_a(info) \ |
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((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff)) |
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#define LDT_entry_b(info) \ |
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(((info)->base_addr & 0xff000000) | \ |
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(((info)->base_addr & 0x00ff0000) >> 16) | \ |
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((info)->limit & 0xf0000) | \ |
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(((info)->read_exec_only ^ 1) << 9) | \ |
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((info)->contents << 10) | \ |
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(((info)->seg_not_present ^ 1) << 15) | \ |
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((info)->seg_32bit << 22) | \ |
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((info)->limit_in_pages << 23) | \ |
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((info)->useable << 20) | \ |
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0x7000) |
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#define _LDT_empty(info) (\ |
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(info)->base_addr == 0 && \ |
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(info)->limit == 0 && \ |
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(info)->contents == 0 && \ |
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(info)->read_exec_only == 1 && \ |
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(info)->seg_32bit == 0 && \ |
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(info)->limit_in_pages == 0 && \ |
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(info)->seg_not_present == 1 && \ |
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(info)->useable == 0 ) |
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#ifdef CONFIG_X86_64 |
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#define LDT_empty(info) (_LDT_empty(info) && ((info)->lm == 0)) |
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#else |
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#define LDT_empty(info) (_LDT_empty(info)) |
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#endif |
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struct uml_arch_mm_context { |
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uml_ldt_t ldt; |
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}; |
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#endif
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