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Blackfin arch: Add Workaround for ANOMALY 05000257 

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Michael Hennerich 2007-05-21 18:09:09 +08:00 committed by Linus Torvalds
parent e8edc6e03a
commit 8af10b7987
2 changed files with 20 additions and 6 deletions
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14
arch/blackfin/lib/ins.S
View File

@ -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;

6
arch/blackfin/mach-common/entry.S
View File

@ -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;