patch-2.1.101 linux/include/asm-sparc64/mmu_context.h

• Lines: 87
• Date: Fri May 8 00:11:36 1998
• Orig file: v2.1.100/linux/include/asm-sparc64/mmu_context.h
• Orig date: Thu May 7 22:51:54 1998

diff -u --recursive --new-file v2.1.100/linux/include/asm-sparc64/mmu_context.h linux/include/asm-sparc64/mmu_context.h
@@ -1,4 +1,4 @@
-/* $Id: mmu_context.h,v 1.20 1997/09/18 10:42:08 rth Exp $ */
+/* $Id: mmu_context.h,v 1.24 1998/05/06 02:07:54 paulus Exp $ */
 #ifndef __SPARC64_MMU_CONTEXT_H
 #define __SPARC64_MMU_CONTEXT_H
 
@@ -6,38 +6,35 @@
 
 #include <asm/system.h>
 #include <asm/spitfire.h>
+#include <asm/spinlock.h>
 
 #define NO_CONTEXT     0
 
 #ifndef __ASSEMBLY__
 
 extern unsigned long tlb_context_cache;
+extern spinlock_t scheduler_lock;
+extern unsigned long mmu_context_bmap[];
 
-#define CTX_VERSION_SHIFT	PAGE_SHIFT
+#define CTX_VERSION_SHIFT	(PAGE_SHIFT - 3)
 #define CTX_VERSION_MASK	((~0UL) << CTX_VERSION_SHIFT)
 #define CTX_FIRST_VERSION	((1UL << CTX_VERSION_SHIFT) + 1UL)
 
-extern void get_new_mmu_context(struct mm_struct *mm, unsigned long *ctx);
+extern void get_new_mmu_context(struct mm_struct *mm);
 
 /* Initialize/destroy the context related info for a new mm_struct
  * instance.
  */
 #define init_new_context(mm)	((mm)->context = NO_CONTEXT)
-#define destroy_context(mm)	((mm)->context = NO_CONTEXT)
-
-#ifdef __SMP__
-#define LOCAL_FLUSH_PENDING(cpu)	\
-	((cpu_data[(cpu)].last_tlbversion_seen ^ tlb_context_cache) & CTX_VERSION_MASK)
-#define DO_LOCAL_FLUSH(cpu)		do { __flush_tlb_all();				\
-					     cpu_data[cpu].last_tlbversion_seen =	\
-					     tlb_context_cache & CTX_VERSION_MASK;	\
-					} while(0)
-#else
-#define LOCAL_FLUSH_PENDING(cpu)	0
-#define DO_LOCAL_FLUSH(cpu)		do { __flush_tlb_all(); } while(0)
-#endif
-
-extern void __flush_tlb_all(void);
+#define destroy_context(mm)	do { 								\
+	if ((mm)->context != NO_CONTEXT) { 							\
+		spin_lock(&scheduler_lock); 							\
+		if (!(((mm)->context ^ tlb_context_cache) & CTX_VERSION_MASK))			\
+			clear_bit((mm)->context & ~(CTX_VERSION_MASK), mmu_context_bmap);	\
+		spin_unlock(&scheduler_lock); 							\
+		(mm)->context = NO_CONTEXT; 							\
+	} 											\
+} while (0)
 
 extern __inline__ void get_mmu_context(struct task_struct *tsk)
 {
@@ -45,18 +42,22 @@
 	struct mm_struct *mm = tsk->mm;
 
 	flushw_user();
-	if(LOCAL_FLUSH_PENDING(current->processor))
-		DO_LOCAL_FLUSH(current->processor);
 	if(!(tsk->tss.flags & SPARC_FLAG_KTHREAD)	&&
 	   !(tsk->flags & PF_EXITING)) {
 		unsigned long ctx = tlb_context_cache;
 		if((mm->context ^ ctx) & CTX_VERSION_MASK)
-			get_new_mmu_context(mm, &tlb_context_cache);
-
+			get_new_mmu_context(mm);
+		if(!(mm->cpu_vm_mask & (1UL<<smp_processor_id()))) {
+			spitfire_set_secondary_context(mm->context & 0x3ff);
+			__asm__ __volatile__("flush %g6");
+			spitfire_flush_dtlb_secondary_context();
+			spitfire_flush_itlb_secondary_context();
+			__asm__ __volatile__("flush %g6");
+		}
 		/* Don't worry, set_fs() will restore it... */
 		/* Sigh, damned include loops... just poke seg directly.  */
 		tsk->tss.ctx = (tsk->tss.current_ds.seg ?
-				(mm->context & 0x1fff) : 0);
+				(mm->context & 0x3ff) : 0);
 	} else
 		tsk->tss.ctx = 0;
 	spitfire_set_secondary_context(tsk->tss.ctx);