1 files changed, 59 insertions, 202 deletions

diff --git a/arch/sparc64/kernel/unaligned.c b/arch/sparc64/kernel/unaligned.c
index 4372bf32ecf..11c3e88732e 100644
--- a/arch/sparc64/kernel/unaligned.c
+++ b/arch/sparc64/kernel/unaligned.c
@@ -180,169 +180,28 @@ static void __attribute_used__ unaligned_panic(char *str, struct pt_regs *regs)
 	die_if_kernel(str, regs);
 }
 
-#define do_integer_load(dest_reg, size, saddr, is_signed, asi, errh) ({		\
-__asm__ __volatile__ (								\
-	"wr	%4, 0, %%asi\n\t"						\
-	"cmp	%1, 8\n\t"							\
-	"bge,pn	%%icc, 9f\n\t"							\
-	" cmp	%1, 4\n\t"							\
-	"be,pt	%%icc, 6f\n"							\
-"4:\t"	" lduba	[%2] %%asi, %%l1\n"						\
-"5:\t"	"lduba	[%2 + 1] %%asi, %%l2\n\t"					\
-	"sll	%%l1, 8, %%l1\n\t"						\
-	"brz,pt	%3, 3f\n\t"							\
-	" add	%%l1, %%l2, %%l1\n\t"						\
-	"sllx	%%l1, 48, %%l1\n\t"						\
-	"srax	%%l1, 48, %%l1\n"						\
-"3:\t"	"ba,pt	%%xcc, 0f\n\t"							\
-	" stx	%%l1, [%0]\n"							\
-"6:\t"	"lduba	[%2 + 1] %%asi, %%l2\n\t"					\
-	"sll	%%l1, 24, %%l1\n"						\
-"7:\t"	"lduba	[%2 + 2] %%asi, %%g7\n\t"					\
-	"sll	%%l2, 16, %%l2\n"						\
-"8:\t"	"lduba	[%2 + 3] %%asi, %%g1\n\t"					\
-	"sll	%%g7, 8, %%g7\n\t"						\
-	"or	%%l1, %%l2, %%l1\n\t"						\
-	"or	%%g7, %%g1, %%g7\n\t"						\
-	"or	%%l1, %%g7, %%l1\n\t"						\
-	"brnz,a,pt %3, 3f\n\t"							\
-	" sra	%%l1, 0, %%l1\n"						\
-"3:\t"	"ba,pt	%%xcc, 0f\n\t"							\
-	" stx	%%l1, [%0]\n"							\
-"9:\t"	"lduba	[%2] %%asi, %%l1\n"						\
-"10:\t"	"lduba	[%2 + 1] %%asi, %%l2\n\t"					\
-	"sllx	%%l1, 56, %%l1\n"						\
-"11:\t"	"lduba	[%2 + 2] %%asi, %%g7\n\t"					\
-	"sllx	%%l2, 48, %%l2\n"						\
-"12:\t"	"lduba	[%2 + 3] %%asi, %%g1\n\t"					\
-	"sllx	%%g7, 40, %%g7\n\t"						\
-	"sllx	%%g1, 32, %%g1\n\t"						\
-	"or	%%l1, %%l2, %%l1\n\t"						\
-	"or	%%g7, %%g1, %%g7\n"						\
-"13:\t"	"lduba	[%2 + 4] %%asi, %%l2\n\t"					\
-	"or	%%l1, %%g7, %%g7\n"						\
-"14:\t"	"lduba	[%2 + 5] %%asi, %%g1\n\t"					\
-	"sllx	%%l2, 24, %%l2\n"						\
-"15:\t"	"lduba	[%2 + 6] %%asi, %%l1\n\t"					\
-	"sllx	%%g1, 16, %%g1\n\t"						\
-	"or	%%g7, %%l2, %%g7\n"						\
-"16:\t"	"lduba	[%2 + 7] %%asi, %%l2\n\t"					\
-	"sllx	%%l1, 8, %%l1\n\t"						\
-	"or	%%g7, %%g1, %%g7\n\t"						\
-	"or	%%l1, %%l2, %%l1\n\t"						\
-	"or	%%g7, %%l1, %%g7\n\t"						\
-	"cmp	%1, 8\n\t"							\
-	"be,a,pt %%icc, 0f\n\t"							\
-	" stx	%%g7, [%0]\n\t"							\
-	"srlx	%%g7, 32, %%l1\n\t"						\
-	"sra	%%g7, 0, %%g7\n\t"						\
-	"stx	%%l1, [%0]\n\t"							\
-	"stx	%%g7, [%0 + 8]\n"						\
-"0:\n\t"									\
-	"wr	%%g0, %5, %%asi\n\n\t"						\
-	".section __ex_table\n\t"						\
-	".word	4b, " #errh "\n\t"						\
-	".word	5b, " #errh "\n\t"						\
-	".word	6b, " #errh "\n\t"						\
-	".word	7b, " #errh "\n\t"						\
-	".word	8b, " #errh "\n\t"						\
-	".word	9b, " #errh "\n\t"						\
-	".word	10b, " #errh "\n\t"						\
-	".word	11b, " #errh "\n\t"						\
-	".word	12b, " #errh "\n\t"						\
-	".word	13b, " #errh "\n\t"						\
-	".word	14b, " #errh "\n\t"						\
-	".word	15b, " #errh "\n\t"						\
-	".word	16b, " #errh "\n\n\t"						\
-	".previous\n\t"								\
-	: : "r" (dest_reg), "r" (size), "r" (saddr), "r" (is_signed),		\
-	  "r" (asi), "i" (ASI_AIUS)						\
-	: "l1", "l2", "g7", "g1", "cc");					\
-})
+extern void do_int_load(unsigned long *dest_reg, int size,
+			unsigned long *saddr, int is_signed, int asi);
 	
-#define store_common(dst_addr, size, src_val, asi, errh) ({			\
-__asm__ __volatile__ (								\
-	"wr	%3, 0, %%asi\n\t"						\
-	"ldx	[%2], %%l1\n"							\
-	"cmp	%1, 2\n\t"							\
-	"be,pn	%%icc, 2f\n\t"							\
-	" cmp	%1, 4\n\t"							\
-	"be,pt	%%icc, 1f\n\t"							\
-	" srlx	%%l1, 24, %%l2\n\t"						\
-	"srlx	%%l1, 56, %%g1\n\t"						\
-	"srlx	%%l1, 48, %%g7\n"						\
-"4:\t"	"stba	%%g1, [%0] %%asi\n\t"						\
-	"srlx	%%l1, 40, %%g1\n"						\
-"5:\t"	"stba	%%g7, [%0 + 1] %%asi\n\t"					\
-	"srlx	%%l1, 32, %%g7\n"						\
-"6:\t"	"stba	%%g1, [%0 + 2] %%asi\n"						\
-"7:\t"	"stba	%%g7, [%0 + 3] %%asi\n\t"					\
-	"srlx	%%l1, 16, %%g1\n"						\
-"8:\t"	"stba	%%l2, [%0 + 4] %%asi\n\t"					\
-	"srlx	%%l1, 8, %%g7\n"						\
-"9:\t"	"stba	%%g1, [%0 + 5] %%asi\n"						\
-"10:\t"	"stba	%%g7, [%0 + 6] %%asi\n\t"					\
-	"ba,pt	%%xcc, 0f\n"							\
-"11:\t"	" stba	%%l1, [%0 + 7] %%asi\n"						\
-"1:\t"	"srl	%%l1, 16, %%g7\n"						\
-"12:\t"	"stba	%%l2, [%0] %%asi\n\t"						\
-	"srl	%%l1, 8, %%l2\n"						\
-"13:\t"	"stba	%%g7, [%0 + 1] %%asi\n"						\
-"14:\t"	"stba	%%l2, [%0 + 2] %%asi\n\t"					\
-	"ba,pt	%%xcc, 0f\n"							\
-"15:\t"	" stba	%%l1, [%0 + 3] %%asi\n"						\
-"2:\t"	"srl	%%l1, 8, %%l2\n"						\
-"16:\t"	"stba	%%l2, [%0] %%asi\n"						\
-"17:\t"	"stba	%%l1, [%0 + 1] %%asi\n"						\
-"0:\n\t"									\
-	"wr	%%g0, %4, %%asi\n\n\t"						\
-	".section __ex_table\n\t"						\
-	".word	4b, " #errh "\n\t"						\
-	".word	5b, " #errh "\n\t"						\
-	".word	6b, " #errh "\n\t"						\
-	".word	7b, " #errh "\n\t"						\
-	".word	8b, " #errh "\n\t"						\
-	".word	9b, " #errh "\n\t"						\
-	".word	10b, " #errh "\n\t"						\
-	".word	11b, " #errh "\n\t"						\
-	".word	12b, " #errh "\n\t"						\
-	".word	13b, " #errh "\n\t"						\
-	".word	14b, " #errh "\n\t"						\
-	".word	15b, " #errh "\n\t"						\
-	".word	16b, " #errh "\n\t"						\
-	".word	17b, " #errh "\n\n\t"						\
-	".previous\n\t"								\
-	: : "r" (dst_addr), "r" (size), "r" (src_val), "r" (asi), "i" (ASI_AIUS)\
-	: "l1", "l2", "g7", "g1", "cc");					\
-})
-
-#define do_integer_store(reg_num, size, dst_addr, regs, asi, errh) ({		\
-	unsigned long zero = 0;							\
-	unsigned long *src_val = &zero;						\
-										\
-	if (size == 16) {							\
-		size = 8;							\
-		zero = (((long)(reg_num ? 					\
-		        (unsigned)fetch_reg(reg_num, regs) : 0)) << 32) |	\
-			(unsigned)fetch_reg(reg_num + 1, regs);			\
-	} else if (reg_num) src_val = fetch_reg_addr(reg_num, regs);		\
-	store_common(dst_addr, size, src_val, asi, errh);			\
-})
-
-extern void smp_capture(void);
-extern void smp_release(void);
-
-#define do_atomic(srcdest_reg, mem, errh) ({					\
-	unsigned long flags, tmp;						\
-										\
-	smp_capture();								\
-	local_irq_save(flags);							\
-	tmp = *srcdest_reg;							\
-	do_integer_load(srcdest_reg, 4, mem, 0, errh);				\
-	store_common(mem, 4, &tmp, errh);					\
-	local_irq_restore(flags);						\
-	smp_release();								\
-})
+extern void __do_int_store(unsigned long *dst_addr, int size,
+			   unsigned long *src_val, int asi);
+
+static inline void do_int_store(int reg_num, int size, unsigned long *dst_addr,
+				struct pt_regs *regs, int asi)
+{
+	unsigned long zero = 0;
+	unsigned long *src_val = &zero;
+
+	if (size == 16) {
+		size = 8;
+		zero = (((long)(reg_num ?
+		        (unsigned)fetch_reg(reg_num, regs) : 0)) << 32) |
+			(unsigned)fetch_reg(reg_num + 1, regs);
+	} else if (reg_num) {
+		src_val = fetch_reg_addr(reg_num, regs);
+	}
+	__do_int_store(dst_addr, size, src_val, asi);
+}
 
 static inline void advance(struct pt_regs *regs)
 {
@@ -364,24 +223,29 @@ static inline int ok_for_kernel(unsigned int insn)
 	return !floating_point_load_or_store_p(insn);
 }
 
-void kernel_mna_trap_fault(struct pt_regs *regs, unsigned int insn) __asm__ ("kernel_mna_trap_fault");
-
-void kernel_mna_trap_fault(struct pt_regs *regs, unsigned int insn)
+void kernel_mna_trap_fault(void)
 {
-	unsigned long g2 = regs->u_regs [UREG_G2];
+	struct pt_regs *regs = current_thread_info()->kern_una_regs;
+	unsigned int insn = current_thread_info()->kern_una_insn;
+	unsigned long g2 = regs->u_regs[UREG_G2];
 	unsigned long fixup = search_extables_range(regs->tpc, &g2);
 
 	if (!fixup) {
-		unsigned long address = compute_effective_address(regs, insn, ((insn >> 25) & 0x1f));
+		unsigned long address;
+
+		address = compute_effective_address(regs, insn,
+						    ((insn >> 25) & 0x1f));
         	if (address < PAGE_SIZE) {
-                	printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference in mna handler");
+                	printk(KERN_ALERT "Unable to handle kernel NULL "
+			       "pointer dereference in mna handler");
         	} else
-                	printk(KERN_ALERT "Unable to handle kernel paging request in mna handler");
+                	printk(KERN_ALERT "Unable to handle kernel paging "
+			       "request in mna handler");
 	        printk(KERN_ALERT " at virtual address %016lx\n",address);
-		printk(KERN_ALERT "current->{mm,active_mm}->context = %016lx\n",
+		printk(KERN_ALERT "current->{active_,}mm->context = %016lx\n",
 			(current->mm ? CTX_HWBITS(current->mm->context) :
 			CTX_HWBITS(current->active_mm->context)));
-		printk(KERN_ALERT "current->{mm,active_mm}->pgd = %016lx\n",
+		printk(KERN_ALERT "current->{active_,}mm->pgd = %016lx\n",
 			(current->mm ? (unsigned long) current->mm->pgd :
 			(unsigned long) current->active_mm->pgd));
 	        die_if_kernel("Oops", regs);
@@ -400,48 +264,41 @@ asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn, u
 	enum direction dir = decode_direction(insn);
 	int size = decode_access_size(insn);
 
+	current_thread_info()->kern_una_regs = regs;
+	current_thread_info()->kern_una_insn = insn;
+
 	if (!ok_for_kernel(insn) || dir == both) {
-		printk("Unsupported unaligned load/store trap for kernel at <%016lx>.\n",
-		       regs->tpc);
-		unaligned_panic("Kernel does fpu/atomic unaligned load/store.", regs);
-
-		__asm__ __volatile__ ("\n"
-"kernel_unaligned_trap_fault:\n\t"
-		"mov	%0, %%o0\n\t"
-		"call	kernel_mna_trap_fault\n\t"
-		" mov	%1, %%o1\n\t"
-		:
-		: "r" (regs), "r" (insn)
-		: "o0", "o1", "o2", "o3", "o4", "o5", "o7",
-		  "g1", "g2", "g3", "g4", "g7", "cc");
+		printk("Unsupported unaligned load/store trap for kernel "
+		       "at <%016lx>.\n", regs->tpc);
+		unaligned_panic("Kernel does fpu/atomic "
+				"unaligned load/store.", regs);
+
+		kernel_mna_trap_fault();
 	} else {
-		unsigned long addr = compute_effective_address(regs, insn, ((insn >> 25) & 0x1f));
+		unsigned long addr;
 
+		addr = compute_effective_address(regs, insn,
+						 ((insn >> 25) & 0x1f));
 #ifdef DEBUG_MNA
-		printk("KMNA: pc=%016lx [dir=%s addr=%016lx size=%d] retpc[%016lx]\n",
-		       regs->tpc, dirstrings[dir], addr, size, regs->u_regs[UREG_RETPC]);
+		printk("KMNA: pc=%016lx [dir=%s addr=%016lx size=%d] "
+		       "retpc[%016lx]\n",
+		       regs->tpc, dirstrings[dir], addr, size,
+		       regs->u_regs[UREG_RETPC]);
 #endif
 		switch (dir) {
 		case load:
-			do_integer_load(fetch_reg_addr(((insn>>25)&0x1f), regs),
-					size, (unsigned long *) addr,
-					decode_signedness(insn), decode_asi(insn, regs),
-					kernel_unaligned_trap_fault);
+			do_int_load(fetch_reg_addr(((insn>>25)&0x1f), regs),
+				    size, (unsigned long *) addr,
+				    decode_signedness(insn),
+				    decode_asi(insn, regs));
 			break;
 
 		case store:
-			do_integer_store(((insn>>25)&0x1f), size,
-					 (unsigned long *) addr, regs,
-					 decode_asi(insn, regs),
-					 kernel_unaligned_trap_fault);
-			break;
-#if 0 /* unsupported */
-		case both:
-			do_atomic(fetch_reg_addr(((insn>>25)&0x1f), regs),
-				  (unsigned long *) addr,
-				  kernel_unaligned_trap_fault);
+			do_int_store(((insn>>25)&0x1f), size,
+				     (unsigned long *) addr, regs,
+				     decode_asi(insn, regs));
 			break;
-#endif
+
 		default:
 			panic("Impossible kernel unaligned trap.");
 			/* Not reached... */