1 files changed, 0 insertions, 260 deletions
diff --git a/include/asm-alpha/mmu_context.h b/include/asm-alpha/mmu_context.h
deleted file mode 100644
index 86c08a02d23..00000000000
--- a/include/asm-alpha/mmu_context.h
+++ /dev/null
@@ -1,260 +0,0 @@
-#ifndef __ALPHA_MMU_CONTEXT_H
-#define __ALPHA_MMU_CONTEXT_H
-
-/*
- * get a new mmu context..
- *
- * Copyright (C) 1996, Linus Torvalds
- */
-
-#include <asm/system.h>
-#include <asm/machvec.h>
-#include <asm/compiler.h>
-#include <asm-generic/mm_hooks.h>
-
-/*
- * Force a context reload. This is needed when we change the page
- * table pointer or when we update the ASN of the current process.
- */
-
-/* Don't get into trouble with dueling __EXTERN_INLINEs.  */
-#ifndef __EXTERN_INLINE
-#include <asm/io.h>
-#endif
-
-
-static inline unsigned long
-__reload_thread(struct pcb_struct *pcb)
-{
-	register unsigned long a0 __asm__("$16");
-	register unsigned long v0 __asm__("$0");
-
-	a0 = virt_to_phys(pcb);
-	__asm__ __volatile__(
-		"call_pal %2 #__reload_thread"
-		: "=r"(v0), "=r"(a0)
-		: "i"(PAL_swpctx), "r"(a0)
-		: "$1", "$22", "$23", "$24", "$25");
-
-	return v0;
-}
-
-
-/*
- * The maximum ASN's the processor supports.  On the EV4 this is 63
- * but the PAL-code doesn't actually use this information.  On the
- * EV5 this is 127, and EV6 has 255.
- *
- * On the EV4, the ASNs are more-or-less useless anyway, as they are
- * only used as an icache tag, not for TB entries.  On the EV5 and EV6,
- * ASN's also validate the TB entries, and thus make a lot more sense.
- *
- * The EV4 ASN's don't even match the architecture manual, ugh.  And
- * I quote: "If a processor implements address space numbers (ASNs),
- * and the old PTE has the Address Space Match (ASM) bit clear (ASNs
- * in use) and the Valid bit set, then entries can also effectively be
- * made coherent by assigning a new, unused ASN to the currently
- * running process and not reusing the previous ASN before calling the
- * appropriate PALcode routine to invalidate the translation buffer (TB)". 
- *
- * In short, the EV4 has a "kind of" ASN capability, but it doesn't actually
- * work correctly and can thus not be used (explaining the lack of PAL-code
- * support).
- */
-#define EV4_MAX_ASN 63
-#define EV5_MAX_ASN 127
-#define EV6_MAX_ASN 255
-
-#ifdef CONFIG_ALPHA_GENERIC
-# define MAX_ASN	(alpha_mv.max_asn)
-#else
-# ifdef CONFIG_ALPHA_EV4
-#  define MAX_ASN	EV4_MAX_ASN
-# elif defined(CONFIG_ALPHA_EV5)
-#  define MAX_ASN	EV5_MAX_ASN
-# else
-#  define MAX_ASN	EV6_MAX_ASN
-# endif
-#endif
-
-/*
- * cpu_last_asn(processor):
- * 63                                            0
- * +-------------+----------------+--------------+
- * | asn version | this processor | hardware asn |
- * +-------------+----------------+--------------+
- */
-
-#include <asm/smp.h>
-#ifdef CONFIG_SMP
-#define cpu_last_asn(cpuid)	(cpu_data[cpuid].last_asn)
-#else
-extern unsigned long last_asn;
-#define cpu_last_asn(cpuid)	last_asn
-#endif /* CONFIG_SMP */
-
-#define WIDTH_HARDWARE_ASN	8
-#define ASN_FIRST_VERSION (1UL << WIDTH_HARDWARE_ASN)
-#define HARDWARE_ASN_MASK ((1UL << WIDTH_HARDWARE_ASN) - 1)
-
-/*
- * NOTE! The way this is set up, the high bits of the "asn_cache" (and
- * the "mm->context") are the ASN _version_ code. A version of 0 is
- * always considered invalid, so to invalidate another process you only
- * need to do "p->mm->context = 0".
- *
- * If we need more ASN's than the processor has, we invalidate the old
- * user TLB's (tbiap()) and start a new ASN version. That will automatically
- * force a new asn for any other processes the next time they want to
- * run.
- */
-
-#ifndef __EXTERN_INLINE
-#define __EXTERN_INLINE extern inline
-#define __MMU_EXTERN_INLINE
-#endif
-
-extern inline unsigned long
-__get_new_mm_context(struct mm_struct *mm, long cpu)
-{
-	unsigned long asn = cpu_last_asn(cpu);
-	unsigned long next = asn + 1;
-
-	if ((asn & HARDWARE_ASN_MASK) >= MAX_ASN) {
-		tbiap();
-		imb();
-		next = (asn & ~HARDWARE_ASN_MASK) + ASN_FIRST_VERSION;
-	}
-	cpu_last_asn(cpu) = next;
-	return next;
-}
-
-__EXTERN_INLINE void
-ev5_switch_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm,
-	      struct task_struct *next)
-{
-	/* Check if our ASN is of an older version, and thus invalid. */
-	unsigned long asn;
-	unsigned long mmc;
-	long cpu = smp_processor_id();
-
-#ifdef CONFIG_SMP
-	cpu_data[cpu].asn_lock = 1;
-	barrier();
-#endif
-	asn = cpu_last_asn(cpu);
-	mmc = next_mm->context[cpu];
-	if ((mmc ^ asn) & ~HARDWARE_ASN_MASK) {
-		mmc = __get_new_mm_context(next_mm, cpu);
-		next_mm->context[cpu] = mmc;
-	}
-#ifdef CONFIG_SMP
-	else
-		cpu_data[cpu].need_new_asn = 1;
-#endif
-
-	/* Always update the PCB ASN.  Another thread may have allocated
-	   a new mm->context (via flush_tlb_mm) without the ASN serial
-	   number wrapping.  We have no way to detect when this is needed.  */
-	task_thread_info(next)->pcb.asn = mmc & HARDWARE_ASN_MASK;
-}
-
-__EXTERN_INLINE void
-ev4_switch_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm,
-	      struct task_struct *next)
-{
-	/* As described, ASN's are broken for TLB usage.  But we can
-	   optimize for switching between threads -- if the mm is
-	   unchanged from current we needn't flush.  */
-	/* ??? May not be needed because EV4 PALcode recognizes that
-	   ASN's are broken and does a tbiap itself on swpctx, under
-	   the "Must set ASN or flush" rule.  At least this is true
-	   for a 1992 SRM, reports Joseph Martin (jmartin@hlo.dec.com).
-	   I'm going to leave this here anyway, just to Be Sure.  -- r~  */
-	if (prev_mm != next_mm)
-		tbiap();
-
-	/* Do continue to allocate ASNs, because we can still use them
-	   to avoid flushing the icache.  */
-	ev5_switch_mm(prev_mm, next_mm, next);
-}
-
-extern void __load_new_mm_context(struct mm_struct *);
-
-#ifdef CONFIG_SMP
-#define check_mmu_context()					\
-do {								\
-	int cpu = smp_processor_id();				\
-	cpu_data[cpu].asn_lock = 0;				\
-	barrier();						\
-	if (cpu_data[cpu].need_new_asn) {			\
-		struct mm_struct * mm = current->active_mm;	\
-		cpu_data[cpu].need_new_asn = 0;			\
-		if (!mm->context[cpu])			\
-			__load_new_mm_context(mm);		\
-	}							\
-} while(0)
-#else
-#define check_mmu_context()  do { } while(0)
-#endif
-
-__EXTERN_INLINE void
-ev5_activate_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm)
-{
-	__load_new_mm_context(next_mm);
-}
-
-__EXTERN_INLINE void
-ev4_activate_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm)
-{
-	__load_new_mm_context(next_mm);
-	tbiap();
-}
-
-#define deactivate_mm(tsk,mm)	do { } while (0)
-
-#ifdef CONFIG_ALPHA_GENERIC
-# define switch_mm(a,b,c)	alpha_mv.mv_switch_mm((a),(b),(c))
-# define activate_mm(x,y)	alpha_mv.mv_activate_mm((x),(y))
-#else
-# ifdef CONFIG_ALPHA_EV4
-#  define switch_mm(a,b,c)	ev4_switch_mm((a),(b),(c))
-#  define activate_mm(x,y)	ev4_activate_mm((x),(y))
-# else
-#  define switch_mm(a,b,c)	ev5_switch_mm((a),(b),(c))
-#  define activate_mm(x,y)	ev5_activate_mm((x),(y))
-# endif
-#endif
-
-static inline int
-init_new_context(struct task_struct *tsk, struct mm_struct *mm)
-{
-	int i;
-
-	for_each_online_cpu(i)
-		mm->context[i] = 0;
-	if (tsk != current)
-		task_thread_info(tsk)->pcb.ptbr
-		  = ((unsigned long)mm->pgd - IDENT_ADDR) >> PAGE_SHIFT;
-	return 0;
-}
-
-extern inline void
-destroy_context(struct mm_struct *mm)
-{
-	/* Nothing to do.  */
-}
-
-static inline void
-enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
-{
-	task_thread_info(tsk)->pcb.ptbr
-	  = ((unsigned long)mm->pgd - IDENT_ADDR) >> PAGE_SHIFT;
-}
-
-#ifdef __MMU_EXTERN_INLINE
-#undef __EXTERN_INLINE
-#undef __MMU_EXTERN_INLINE
-#endif
-
-#endif /* __ALPHA_MMU_CONTEXT_H */