Commit 8af10b79 authored by Michael Hennerich's avatar Michael Hennerich Committed by Linus Torvalds
Browse files

Blackfin arch: Add Workaround for ANOMALY 05000257 



Signed-off-by: default avatarMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: default avatarBryan Wu <bryan.wu@analog.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e8edc6e0

arch/blackfin/lib/ins.S

+14 −6
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ 
 */



#include <linux/linkage.h>

#include <asm/blackfin.h>



.align 2
@@ -40,10 +41,13 @@ ENTRY(_insl) 
	SSYNC;

	LSETUP( .Llong_loop_s, .Llong_loop_e) LC0 = P2;

.Llong_loop_s:  R0 = [P0];

.Llong_loop_e: [P1++] = R0;

		[P1++] = R0;

		NOP;

.Llong_loop_e: 	NOP;

	sti R3;

	RTS;





ENTRY(_insw)

	P0 = R0;	/* P0 = port */

	cli R3;
@@ -52,7 +56,9 @@ ENTRY(_insw) 
	SSYNC;

	LSETUP( .Lword_loop_s, .Lword_loop_e) LC0 = P2;

.Lword_loop_s:  R0 = W[P0];

.Lword_loop_e: W[P1++] = R0;

		W[P1++] = R0;

		NOP;

.Lword_loop_e: 	NOP;

	sti R3;

	RTS;
@@ -64,6 +70,8 @@ ENTRY(_insb) 
	SSYNC;

	LSETUP( .Lbyte_loop_s, .Lbyte_loop_e) LC0 = P2;

.Lbyte_loop_s:  R0 = B[P0];

.Lbyte_loop_e: B[P1++] = R0;

		B[P1++] = R0;

		NOP;

.Lbyte_loop_e:  NOP;

	sti R3;

	RTS;

arch/blackfin/mach-common/entry.S

+6 −0
Original line number Diff line number Diff line
@@ -181,6 +181,12 @@ ENTRY(_ex_single_step) 


_return_from_exception:

	DEBUG_START_HWTRACE

#ifdef ANOMALY_05000257

	R7=LC0;

	LC0=R7;

	R7=LC1;

	LC1=R7;

#endif

	(R7:6,P5:4) = [sp++];

	ASTAT = [sp++];

	sp = retn;