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/
usr/
src/
linux-headers-3.0.0-14/
arch/
s390/
include/
asm/
- drwxr-xr-x
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Viewing file: tlbflush.h (3.28 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
#ifndef _S390_TLBFLUSH_H #define _S390_TLBFLUSH_H
#include <linux/mm.h> #include <linux/sched.h> #include <asm/processor.h> #include <asm/pgalloc.h>
/* * Flush all tlb entries on the local cpu. */ static inline void __tlb_flush_local(void) { asm volatile("ptlb" : : : "memory"); }
#ifdef CONFIG_SMP /* * Flush all tlb entries on all cpus. */ void smp_ptlb_all(void);
static inline void __tlb_flush_global(void) { register unsigned long reg2 asm("2"); register unsigned long reg3 asm("3"); register unsigned long reg4 asm("4"); long dummy;
#ifndef __s390x__ if (!MACHINE_HAS_CSP) { smp_ptlb_all(); return; } #endif /* __s390x__ */
dummy = 0; reg2 = reg3 = 0; reg4 = ((unsigned long) &dummy) + 1; asm volatile( " csp %0,%2" : : "d" (reg2), "d" (reg3), "d" (reg4), "m" (dummy) : "cc" ); }
static inline void __tlb_flush_full(struct mm_struct *mm) { cpumask_t local_cpumask;
preempt_disable(); /* * If the process only ran on the local cpu, do a local flush. */ cpumask_copy(&local_cpumask, cpumask_of(smp_processor_id())); if (cpumask_equal(mm_cpumask(mm), &local_cpumask)) __tlb_flush_local(); else __tlb_flush_global(); preempt_enable(); } #else #define __tlb_flush_full(mm) __tlb_flush_local() #endif
/* * Flush all tlb entries of a page table on all cpus. */ static inline void __tlb_flush_idte(unsigned long asce) { asm volatile( " .insn rrf,0xb98e0000,0,%0,%1,0" : : "a" (2048), "a" (asce) : "cc" ); }
static inline void __tlb_flush_mm(struct mm_struct * mm) { if (unlikely(cpumask_empty(mm_cpumask(mm)))) return; /* * If the machine has IDTE we prefer to do a per mm flush * on all cpus instead of doing a local flush if the mm * only ran on the local cpu. */ if (MACHINE_HAS_IDTE) __tlb_flush_idte((unsigned long) mm->pgd | mm->context.asce_bits); else __tlb_flush_full(mm); }
static inline void __tlb_flush_mm_cond(struct mm_struct * mm) { spin_lock(&mm->page_table_lock); if (mm->context.flush_mm) { __tlb_flush_mm(mm); mm->context.flush_mm = 0; } spin_unlock(&mm->page_table_lock); }
/* * TLB flushing: * flush_tlb() - flushes the current mm struct TLBs * flush_tlb_all() - flushes all processes TLBs * flush_tlb_mm(mm) - flushes the specified mm context TLB's * flush_tlb_page(vma, vmaddr) - flushes one page * flush_tlb_range(vma, start, end) - flushes a range of pages * flush_tlb_kernel_range(start, end) - flushes a range of kernel pages */
/* * flush_tlb_mm goes together with ptep_set_wrprotect for the * copy_page_range operation and flush_tlb_range is related to * ptep_get_and_clear for change_protection. ptep_set_wrprotect and * ptep_get_and_clear do not flush the TLBs directly if the mm has * only one user. At the end of the update the flush_tlb_mm and * flush_tlb_range functions need to do the flush. */ #define flush_tlb() do { } while (0) #define flush_tlb_all() do { } while (0) #define flush_tlb_page(vma, addr) do { } while (0)
static inline void flush_tlb_mm(struct mm_struct *mm) { __tlb_flush_mm_cond(mm); }
static inline void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { __tlb_flush_mm_cond(vma->vm_mm); }
static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end) { __tlb_flush_mm(&init_mm); }
#endif /* _S390_TLBFLUSH_H */
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