http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/asm-x86_64/mmu_context.h

#ifndef __X86_64_MMU_CONTEXT_H #define __X86_64_MMU_CONTEXT_H #include <linux/config.h> #include <asm/desc.h> #include <asm/atomic.h> #include <asm/pgalloc.h> #include <asm/pda.h> #include <asm/pgtable.h> #include <asm/tlbflush.h> /* * possibly do the LDT unload here? */ int init_new_context(struct task_struct *tsk, struct mm_struct *mm); void destroy_context(struct mm_struct *mm); static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) { #ifdef CONFIG_SMP if (read_pda(mmu_state) == TLBSTATE_OK) write_pda(mmu_state, TLBSTATE_LAZY); #endif } static inline void load_cr3(pgd_t *pgd) { asm volatile("movq %0,%%cr3" :: "r" (__pa(pgd)) : "memory"); } static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk) { unsigned cpu = smp_processor_id(); if (likely(prev != next)) { /* stop flush ipis for the previous mm */ clear_bit(cpu, &prev->cpu_vm_mask); #ifdef CONFIG_SMP write_pda(mmu_state, TLBSTATE_OK); write_pda(active_mm, next); #endif set_bit(cpu, &next->cpu_vm_mask); load_cr3(next->pgd); if (unlikely(next->context.ldt != prev->context.ldt)) load_LDT_nolock(&next->context, cpu); } #ifdef CONFIG_SMP else { write_pda(mmu_state, TLBSTATE_OK); if (read_pda(active_mm) != next) out_of_line_bug(); if(!test_and_set_bit(cpu, &next->cpu_vm_mask)) { /* We were in lazy tlb mode and leave_mm disabled * tlb flush IPI delivery. We must reload CR3 * to make sure to use no freed page tables. */ load_cr3(next->pgd); load_LDT_nolock(&next->context, cpu); } } #endif } #define deactivate_mm(tsk,mm) do { \ load_gs_index(0); \ asm volatile("movl %0,%%fs"::"r"(0)); \ } while(0) #define activate_mm(prev, next) \ switch_mm((prev),(next),NULL) #endif