Blackfin arch: IO Port functions to read/write unalligned memory
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
diff --git a/arch/blackfin/kernel/bfin_ksyms.c b/arch/blackfin/kernel/bfin_ksyms.c
index 053edff..4367330 100644
--- a/arch/blackfin/kernel/bfin_ksyms.c
+++ b/arch/blackfin/kernel/bfin_ksyms.c
@@ -90,7 +90,9 @@
EXPORT_SYMBOL(outsb);
EXPORT_SYMBOL(insb);
EXPORT_SYMBOL(outsw);
+EXPORT_SYMBOL(outsw_8);
EXPORT_SYMBOL(insw);
+EXPORT_SYMBOL(insw_8);
EXPORT_SYMBOL(outsl);
EXPORT_SYMBOL(insl);
EXPORT_SYMBOL(insl_16);
diff --git a/arch/blackfin/lib/ins.S b/arch/blackfin/lib/ins.S
index df7b883..eba2343 100644
--- a/arch/blackfin/lib/ins.S
+++ b/arch/blackfin/lib/ins.S
@@ -7,7 +7,7 @@
* Description: Implementation of ins{bwl} for BlackFin processors using zero overhead loops.
*
* Modified:
- * Copyright 2004-2006 Analog Devices Inc.
+ * Copyright 2004-2008 Analog Devices Inc.
* Copyright (C) 2005 Bas Vermeulen, BuyWays BV <bas@buyways.nl>
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
@@ -63,6 +63,23 @@
RTS;
ENDPROC(_insw)
+ENTRY(_insw_8)
+ P0 = R0; /* P0 = port */
+ cli R3;
+ P1 = R1; /* P1 = address */
+ P2 = R2; /* P2 = count */
+ SSYNC;
+ LSETUP( .Lword8_loop_s, .Lword8_loop_e) LC0 = P2;
+.Lword8_loop_s: R0 = W[P0];
+ B[P1++] = R0;
+ R0 = R0 >> 8;
+ B[P1++] = R0;
+ NOP;
+.Lword8_loop_e: NOP;
+ sti R3;
+ RTS;
+ENDPROC(_insw_8)
+
ENTRY(_insb)
P0 = R0; /* P0 = port */
cli R3;
@@ -78,8 +95,6 @@
RTS;
ENDPROC(_insb)
-
-
ENTRY(_insl_16)
P0 = R0; /* P0 = port */
cli R3;
diff --git a/arch/blackfin/lib/outs.S b/arch/blackfin/lib/outs.S
index 4c3da8a..3daf960 100644
--- a/arch/blackfin/lib/outs.S
+++ b/arch/blackfin/lib/outs.S
@@ -7,7 +7,7 @@
* Description: Implementation of outs{bwl} for BlackFin processors using zero overhead loops.
*
* Modified: Copyright (C) 2005 Bas Vermeulen, BuyWays BV <bas@buyways.nl>
- * Copyright 2004-2006 Analog Devices Inc.
+ * Copyright 2004-2008 Analog Devices Inc.
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
@@ -63,3 +63,17 @@
.Lbyte_loop_e: B[P0] = R0;
RTS;
ENDPROC(_outsb)
+
+ENTRY(_outsw_8)
+ P0 = R0; /* P0 = port */
+ P1 = R1; /* P1 = address */
+ P2 = R2; /* P2 = count */
+
+ LSETUP( .Lword8_loop_s, .Lword8_loop_e) LC0 = P2;
+.Lword8_loop_s: R1 = B[P1++];
+ R0 = B[P1++];
+ R0 = R0 << 8;
+ R0 = R0 + R1;
+.Lword8_loop_e: W[P0] = R0;
+ RTS;
+ENDPROC(_outsw)
diff --git a/include/asm-blackfin/io.h b/include/asm-blackfin/io.h
index 574fe56..cbbf7ff 100644
--- a/include/asm-blackfin/io.h
+++ b/include/asm-blackfin/io.h
@@ -117,10 +117,12 @@
extern void outsb(unsigned long port, const void *addr, unsigned long count);
extern void outsw(unsigned long port, const void *addr, unsigned long count);
+extern void outsw_8(unsigned long port, const void *addr, unsigned long count);
extern void outsl(unsigned long port, const void *addr, unsigned long count);
extern void insb(unsigned long port, void *addr, unsigned long count);
extern void insw(unsigned long port, void *addr, unsigned long count);
+extern void insw_8(unsigned long port, void *addr, unsigned long count);
extern void insl(unsigned long port, void *addr, unsigned long count);
extern void insl_16(unsigned long port, void *addr, unsigned long count);