| /* |
| * Copyright (C) 2004 Fujitsu Siemens Computers GmbH |
| * Licensed under the GPL |
| * |
| * Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com> |
| */ |
| |
| #ifndef __ASM_LDT_I386_H |
| #define __ASM_LDT_I386_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]; |
| }; |
| } uml_ldt_t; |
| |
| /* |
| * macros stolen from include/asm-i386/desc.h |
| */ |
| #define LDT_entry_a(info) \ |
| ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff)) |
| |
| #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) | \ |
| 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 ) |
| |
| #endif |
| #ifndef __UM_LDT_H |
| #define __UM_LDT_H |
| |
| #include "asm/arch/ldt.h" |
| #endif |