Update from upstream with manual merge of Yasunori Goto's

changes to swiotlb.c made in commit 281dd25cdc0d6903929b79183816d151ea626341
since this file has been moved from arch/ia64/lib/swiotlb.c to
lib/swiotlb.c

Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 5 insertions, 64 deletions

diff --git a/arch/sparc64/mm/fault.c b/arch/sparc64/mm/fault.c
index db1e3310e907..31fbc67719a1 100644
--- a/arch/sparc64/mm/fault.c
+++ b/arch/sparc64/mm/fault.c
@@ -32,8 +32,6 @@
 
 #define ELEMENTS(arr) (sizeof (arr)/sizeof (arr[0]))
 
-extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
-
 /*
  * To debug kernel to catch accesses to certain virtual/physical addresses.
  * Mode = 0 selects physical watchpoints, mode = 1 selects virtual watchpoints.
@@ -71,53 +69,6 @@ void set_brkpt(unsigned long addr, unsigned char mask, int flags, int mode)
 			     : "memory");
 }
 
-/* Nice, simple, prom library does all the sweating for us. ;) */
-unsigned long __init prom_probe_memory (void)
-{
-	register struct linux_mlist_p1275 *mlist;
-	register unsigned long bytes, base_paddr, tally;
-	register int i;
-
-	i = 0;
-	mlist = *prom_meminfo()->p1275_available;
-	bytes = tally = mlist->num_bytes;
-	base_paddr = mlist->start_adr;
-  
-	sp_banks[0].base_addr = base_paddr;
-	sp_banks[0].num_bytes = bytes;
-
-	while (mlist->theres_more != (void *) 0) {
-		i++;
-		mlist = mlist->theres_more;
-		bytes = mlist->num_bytes;
-		tally += bytes;
-		if (i >= SPARC_PHYS_BANKS-1) {
-			printk ("The machine has more banks than "
-				"this kernel can support\n"
-				"Increase the SPARC_PHYS_BANKS "
-				"setting (currently %d)\n",
-				SPARC_PHYS_BANKS);
-			i = SPARC_PHYS_BANKS-1;
-			break;
-		}
-    
-		sp_banks[i].base_addr = mlist->start_adr;
-		sp_banks[i].num_bytes = mlist->num_bytes;
-	}
-
-	i++;
-	sp_banks[i].base_addr = 0xdeadbeefbeefdeadUL;
-	sp_banks[i].num_bytes = 0;
-
-	/* Now mask all bank sizes on a page boundary, it is all we can
-	 * use anyways.
-	 */
-	for (i = 0; sp_banks[i].num_bytes != 0; i++)
-		sp_banks[i].num_bytes &= PAGE_MASK;
-
-	return tally;
-}
-
 static void __kprobes unhandled_fault(unsigned long address,
 				      struct task_struct *tsk,
 				      struct pt_regs *regs)
@@ -242,7 +193,6 @@ static unsigned int get_fault_insn(struct pt_regs *regs, unsigned int insn)
 static void do_kernel_fault(struct pt_regs *regs, int si_code, int fault_code,
 			    unsigned int insn, unsigned long address)
 {
-	unsigned long g2;
 	unsigned char asi = ASI_P;
  
 	if ((!insn) && (regs->tstate & TSTATE_PRIV))
@@ -273,11 +223,9 @@ static void do_kernel_fault(struct pt_regs *regs, int si_code, int fault_code,
 		}
 	}
 		
-	g2 = regs->u_regs[UREG_G2];
-
 	/* Is this in ex_table? */
 	if (regs->tstate & TSTATE_PRIV) {
-		unsigned long fixup;
+		const struct exception_table_entry *entry;
 
 		if (asi == ASI_P && (insn & 0xc0800000) == 0xc0800000) {
 			if (insn & 0x2000)
@@ -288,10 +236,9 @@ static void do_kernel_fault(struct pt_regs *regs, int si_code, int fault_code,
 	
 		/* Look in asi.h: All _S asis have LS bit set */
 		if ((asi & 0x1) &&
-		    (fixup = search_extables_range(regs->tpc, &g2))) {
-			regs->tpc = fixup;
+		    (entry = search_exception_tables(regs->tpc))) {
+			regs->tpc = entry->fixup;
 			regs->tnpc = regs->tpc + 4;
-			regs->u_regs[UREG_G2] = g2;
 			return;
 		}
 	} else {
@@ -461,7 +408,7 @@ good_area:
 	}
 
 	up_read(&mm->mmap_sem);
-	goto fault_done;
+	return;
 
 	/*
 	 * Something tried to access memory that isn't in our memory map..
@@ -473,8 +420,7 @@ bad_area:
 
 handle_kernel_fault:
 	do_kernel_fault(regs, si_code, fault_code, insn, address);
-
-	goto fault_done;
+	return;
 
 /*
  * We ran out of memory, or some other thing happened to us that made
@@ -505,9 +451,4 @@ do_sigbus:
 	/* Kernel mode? Handle exceptions or die */
 	if (regs->tstate & TSTATE_PRIV)
 		goto handle_kernel_fault;
-
-fault_done:
-	/* These values are no longer needed, clear them. */
-	set_thread_fault_code(0);
-	current_thread_info()->fault_address = 0;
 }