patch-2.3.50 linux/arch/sparc64/mm/init.c

• Lines: 151
• Date: Fri Mar 3 21:29:24 2000
• Orig file: v2.3.49/linux/arch/sparc64/mm/init.c
• Orig date: Thu Feb 10 17:11:06 2000

diff -u --recursive --new-file v2.3.49/linux/arch/sparc64/mm/init.c linux/arch/sparc64/mm/init.c
@@ -1,4 +1,4 @@
-/*  $Id: init.c,v 1.146 2000/02/09 21:11:09 davem Exp $
+/*  $Id: init.c,v 1.147 2000/03/03 23:48:44 davem Exp $
  *  arch/sparc64/mm/init.c
  *
  *  Copyright (C) 1996-1999 David S. Miller (davem@caip.rutgers.edu)
@@ -230,6 +230,14 @@
 
 	/* Now fixup OBP's idea about where we really are mapped. */
 	prom_printf("Remapping the kernel... ");
+
+	/* Spitfire Errata #32 workaround */
+	__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
+			     "flush	%%g6"
+			     : /* No outputs */
+			     : "r" (0),
+			     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
+
 	phys_page = spitfire_get_dtlb_data(63) & _PAGE_PADDR;
 	phys_page += ((unsigned long)&prom_boot_page -
 		      (unsigned long)&empty_zero_page);
@@ -252,11 +260,27 @@
 		: "memory");
 
 	tte_vaddr = (unsigned long) &empty_zero_page;
+
+	/* Spitfire Errata #32 workaround */
+	__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
+			     "flush	%%g6"
+			     : /* No outputs */
+			     : "r" (0),
+			     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
+
 	kern_locked_tte_data = tte_data = spitfire_get_dtlb_data(63);
 
 	remap_func = (void *)  ((unsigned long) &prom_remap -
 				(unsigned long) &prom_boot_page);
 
+
+	/* Spitfire Errata #32 workaround */
+	__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
+			     "flush	%%g6"
+			     : /* No outputs */
+			     : "r" (0),
+			     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
+
 	remap_func(spitfire_get_dtlb_data(63) & _PAGE_PADDR,
 		   (unsigned long) &empty_zero_page,
 		   prom_get_mmu_ihandle());
@@ -319,8 +343,16 @@
 
 	/* Only DTLB must be checked for VPTE entries. */
 	for(i = 0; i < 63; i++) {
-		unsigned long tag = spitfire_get_dtlb_tag(i);
+		unsigned long tag;
 
+		/* Spitfire Errata #32 workaround */
+		__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
+				     "flush	%%g6"
+				     : /* No outputs */
+				     : "r" (0),
+				     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
+
+		tag = spitfire_get_dtlb_tag(i);
 		if(((tag & ~(PAGE_MASK)) == 0) &&
 		   ((tag &  (PAGE_MASK)) >= prom_reserved_base)) {
 			__asm__ __volatile__("stxa %%g0, [%0] %1"
@@ -436,10 +468,26 @@
 	for(i = 0; i < 63; i++) {
 		unsigned long data;
 
+
+		/* Spitfire Errata #32 workaround */
+		__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
+				     "flush	%%g6"
+				     : /* No outputs */
+				     : "r" (0),
+				     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
+
 		data = spitfire_get_dtlb_data(i);
 		if((data & (_PAGE_L|_PAGE_VALID)) == (_PAGE_L|_PAGE_VALID)) {
-			unsigned long tag = spitfire_get_dtlb_tag(i);
+			unsigned long tag;
+
+			/* Spitfire Errata #32 workaround */
+			__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
+					     "flush	%%g6"
+					     : /* No outputs */
+					     : "r" (0),
+					     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
 
+			tag = spitfire_get_dtlb_tag(i);
 			if(save_p) {
 				prom_dtlb[dtlb_seen].tlb_ent = i;
 				prom_dtlb[dtlb_seen].tlb_tag = tag;
@@ -459,10 +507,25 @@
 	for(i = 0; i < 63; i++) {
 		unsigned long data;
 
+		/* Spitfire Errata #32 workaround */
+		__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
+				     "flush	%%g6"
+				     : /* No outputs */
+				     : "r" (0),
+				     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
+
 		data = spitfire_get_itlb_data(i);
 		if((data & (_PAGE_L|_PAGE_VALID)) == (_PAGE_L|_PAGE_VALID)) {
-			unsigned long tag = spitfire_get_itlb_tag(i);
+			unsigned long tag;
+
+			/* Spitfire Errata #32 workaround */
+			__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
+					     "flush	%%g6"
+					     : /* No outputs */
+					     : "r" (0),
+					     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
 
+			tag = spitfire_get_itlb_tag(i);
 			if(save_p) {
 				prom_itlb[itlb_seen].tlb_ent = i;
 				prom_itlb[itlb_seen].tlb_tag = tag;
@@ -544,6 +607,13 @@
 			     : "=r" (pstate)
 			     : "i" (PSTATE_IE));
 	for(i = 0; i < 64; i++) {
+		/* Spitfire Errata #32 workaround */
+		__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
+				     "flush	%%g6"
+				     : /* No outputs */
+				     : "r" (0),
+				     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
+
 		if(!(spitfire_get_dtlb_data(i) & _PAGE_L)) {
 			__asm__ __volatile__("stxa %%g0, [%0] %1"
 					     : /* no outputs */
@@ -552,6 +622,14 @@
 			spitfire_put_dtlb_data(i, 0x0UL);
 			membar("#Sync");
 		}
+
+		/* Spitfire Errata #32 workaround */
+		__asm__ __volatile__("stxa	%0, [%1] %2\n\t"
+				     "flush	%%g6"
+				     : /* No outputs */
+				     : "r" (0),
+				     "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
+
 		if(!(spitfire_get_itlb_data(i) & _PAGE_L)) {
 			__asm__ __volatile__("stxa %%g0, [%0] %1"
 					     : /* no outputs */