[TG3]: Add tagged status support.
[linux-2.6/verdex.git] / include / asm-s390 / tlbflush.h
blob1bb73b0e61fad19cb65cc84128a5aef59c504089
1 #ifndef _S390_TLBFLUSH_H
2 #define _S390_TLBFLUSH_H
4 #include <linux/config.h>
5 #include <linux/mm.h>
6 #include <asm/processor.h>
8 /*
9 * TLB flushing:
11 * - flush_tlb() flushes the current mm struct TLBs
12 * - flush_tlb_all() flushes all processes TLBs
13 * - flush_tlb_mm(mm) flushes the specified mm context TLB's
14 * - flush_tlb_page(vma, vmaddr) flushes one page
15 * - flush_tlb_range(vma, start, end) flushes a range of pages
16 * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
17 * - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
21 * S/390 has three ways of flushing TLBs
22 * 'ptlb' does a flush of the local processor
23 * 'csp' flushes the TLBs on all PUs of a SMP
24 * 'ipte' invalidates a pte in a page table and flushes that out of
25 * the TLBs of all PUs of a SMP
28 #define local_flush_tlb() \
29 do { __asm__ __volatile__("ptlb": : :"memory"); } while (0)
31 #ifndef CONFIG_SMP
34 * We always need to flush, since s390 does not flush tlb
35 * on each context switch
38 static inline void flush_tlb(void)
40 local_flush_tlb();
42 static inline void flush_tlb_all(void)
44 local_flush_tlb();
46 static inline void flush_tlb_mm(struct mm_struct *mm)
48 local_flush_tlb();
50 static inline void flush_tlb_page(struct vm_area_struct *vma,
51 unsigned long addr)
53 local_flush_tlb();
55 static inline void flush_tlb_range(struct vm_area_struct *vma,
56 unsigned long start, unsigned long end)
58 local_flush_tlb();
61 #define flush_tlb_kernel_range(start, end) \
62 local_flush_tlb();
64 #else
66 #include <asm/smp.h>
68 extern void smp_ptlb_all(void);
70 static inline void global_flush_tlb(void)
72 #ifndef __s390x__
73 if (!MACHINE_HAS_CSP) {
74 smp_ptlb_all();
75 return;
77 #endif /* __s390x__ */
79 register unsigned long addr asm("4");
80 long dummy;
82 dummy = 0;
83 addr = ((unsigned long) &dummy) + 1;
84 __asm__ __volatile__ (
85 " slr 2,2\n"
86 " slr 3,3\n"
87 " csp 2,%0"
88 : : "a" (addr), "m" (dummy) : "cc", "2", "3" );
93 * We only have to do global flush of tlb if process run since last
94 * flush on any other pu than current.
95 * If we have threads (mm->count > 1) we always do a global flush,
96 * since the process runs on more than one processor at the same time.
99 static inline void __flush_tlb_mm(struct mm_struct * mm)
101 cpumask_t local_cpumask;
103 if (unlikely(cpus_empty(mm->cpu_vm_mask)))
104 return;
105 if (MACHINE_HAS_IDTE) {
106 asm volatile (".insn rrf,0xb98e0000,0,%0,%1,0"
107 : : "a" (2048),
108 "a" (__pa(mm->pgd)&PAGE_MASK) : "cc" );
109 return;
111 preempt_disable();
112 local_cpumask = cpumask_of_cpu(smp_processor_id());
113 if (cpus_equal(mm->cpu_vm_mask, local_cpumask))
114 local_flush_tlb();
115 else
116 global_flush_tlb();
117 preempt_enable();
120 static inline void flush_tlb(void)
122 __flush_tlb_mm(current->mm);
124 static inline void flush_tlb_all(void)
126 global_flush_tlb();
128 static inline void flush_tlb_mm(struct mm_struct *mm)
130 __flush_tlb_mm(mm);
132 static inline void flush_tlb_page(struct vm_area_struct *vma,
133 unsigned long addr)
135 __flush_tlb_mm(vma->vm_mm);
137 static inline void flush_tlb_range(struct vm_area_struct *vma,
138 unsigned long start, unsigned long end)
140 __flush_tlb_mm(vma->vm_mm);
143 #define flush_tlb_kernel_range(start, end) global_flush_tlb()
145 #endif
147 static inline void flush_tlb_pgtables(struct mm_struct *mm,
148 unsigned long start, unsigned long end)
150 /* S/390 does not keep any page table caches in TLB */
153 #endif /* _S390_TLBFLUSH_H */