summaryrefslogtreecommitdiffstats
path: root/arch/mips/include
diff options
context:
space:
mode:
authorPaul Martin <paul.martin@codethink.co.uk>2015-03-30 17:00:58 +0100
committerRalf Baechle <ralf@linux-mips.org>2015-04-01 17:22:14 +0200
commitf1e770cf51fc0567b7d2b1d242b5ab8d23399d09 (patch)
tree58603eba4700c568c755117f74287c3e6cd8bccf /arch/mips/include
parentb0abf36ffdc2b7efbb74e02b9dad99b40e85ec3b (diff)
downloadop-kernel-dev-f1e770cf51fc0567b7d2b1d242b5ab8d23399d09.zip
op-kernel-dev-f1e770cf51fc0567b7d2b1d242b5ab8d23399d09.tar.gz
MIPS: Octeon: Reverse the order of register accesses to the FAU
64 bit access is unaffected but for 32 bit access, swap high and low words. Similarly for 16 bit access, reverse the order of the four possible words, and for 8 bit access reverse the order of byte accesses. Signed-off-by: Paul Martin <paul.martin@codethink.co.uk> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9630/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include')
-rw-r--r--arch/mips/include/asm/octeon/cvmx-fau.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/mips/include/asm/octeon/cvmx-fau.h b/arch/mips/include/asm/octeon/cvmx-fau.h
index ef98f7f..dafeae3 100644
--- a/arch/mips/include/asm/octeon/cvmx-fau.h
+++ b/arch/mips/include/asm/octeon/cvmx-fau.h
@@ -105,6 +105,16 @@ typedef union {
} s;
} cvmx_fau_async_tagwait_result_t;
+#ifdef __BIG_ENDIAN_BITFIELD
+#define SWIZZLE_8 0
+#define SWIZZLE_16 0
+#define SWIZZLE_32 0
+#else
+#define SWIZZLE_8 0x7
+#define SWIZZLE_16 0x6
+#define SWIZZLE_32 0x4
+#endif
+
/**
* Builds a store I/O address for writing to the FAU
*
@@ -175,6 +185,7 @@ static inline int64_t cvmx_fau_fetch_and_add64(cvmx_fau_reg_64_t reg,
static inline int32_t cvmx_fau_fetch_and_add32(cvmx_fau_reg_32_t reg,
int32_t value)
{
+ reg ^= SWIZZLE_32;
return cvmx_read64_int32(__cvmx_fau_atomic_address(0, reg, value));
}
@@ -189,6 +200,7 @@ static inline int32_t cvmx_fau_fetch_and_add32(cvmx_fau_reg_32_t reg,
static inline int16_t cvmx_fau_fetch_and_add16(cvmx_fau_reg_16_t reg,
int16_t value)
{
+ reg ^= SWIZZLE_16;
return cvmx_read64_int16(__cvmx_fau_atomic_address(0, reg, value));
}
@@ -201,6 +213,7 @@ static inline int16_t cvmx_fau_fetch_and_add16(cvmx_fau_reg_16_t reg,
*/
static inline int8_t cvmx_fau_fetch_and_add8(cvmx_fau_reg_8_t reg, int8_t value)
{
+ reg ^= SWIZZLE_8;
return cvmx_read64_int8(__cvmx_fau_atomic_address(0, reg, value));
}
@@ -247,6 +260,7 @@ cvmx_fau_tagwait_fetch_and_add32(cvmx_fau_reg_32_t reg, int32_t value)
uint64_t i32;
cvmx_fau_tagwait32_t t;
} result;
+ reg ^= SWIZZLE_32;
result.i32 =
cvmx_read64_int32(__cvmx_fau_atomic_address(1, reg, value));
return result.t;
@@ -270,6 +284,7 @@ cvmx_fau_tagwait_fetch_and_add16(cvmx_fau_reg_16_t reg, int16_t value)
uint64_t i16;
cvmx_fau_tagwait16_t t;
} result;
+ reg ^= SWIZZLE_16;
result.i16 =
cvmx_read64_int16(__cvmx_fau_atomic_address(1, reg, value));
return result.t;
@@ -292,6 +307,7 @@ cvmx_fau_tagwait_fetch_and_add8(cvmx_fau_reg_8_t reg, int8_t value)
uint64_t i8;
cvmx_fau_tagwait8_t t;
} result;
+ reg ^= SWIZZLE_8;
result.i8 = cvmx_read64_int8(__cvmx_fau_atomic_address(1, reg, value));
return result.t;
}
@@ -521,6 +537,7 @@ static inline void cvmx_fau_atomic_add64(cvmx_fau_reg_64_t reg, int64_t value)
*/
static inline void cvmx_fau_atomic_add32(cvmx_fau_reg_32_t reg, int32_t value)
{
+ reg ^= SWIZZLE_32;
cvmx_write64_int32(__cvmx_fau_store_address(0, reg), value);
}
@@ -533,6 +550,7 @@ static inline void cvmx_fau_atomic_add32(cvmx_fau_reg_32_t reg, int32_t value)
*/
static inline void cvmx_fau_atomic_add16(cvmx_fau_reg_16_t reg, int16_t value)
{
+ reg ^= SWIZZLE_16;
cvmx_write64_int16(__cvmx_fau_store_address(0, reg), value);
}
@@ -544,6 +562,7 @@ static inline void cvmx_fau_atomic_add16(cvmx_fau_reg_16_t reg, int16_t value)
*/
static inline void cvmx_fau_atomic_add8(cvmx_fau_reg_8_t reg, int8_t value)
{
+ reg ^= SWIZZLE_8;
cvmx_write64_int8(__cvmx_fau_store_address(0, reg), value);
}
@@ -568,6 +587,7 @@ static inline void cvmx_fau_atomic_write64(cvmx_fau_reg_64_t reg, int64_t value)
*/
static inline void cvmx_fau_atomic_write32(cvmx_fau_reg_32_t reg, int32_t value)
{
+ reg ^= SWIZZLE_32;
cvmx_write64_int32(__cvmx_fau_store_address(1, reg), value);
}
@@ -580,6 +600,7 @@ static inline void cvmx_fau_atomic_write32(cvmx_fau_reg_32_t reg, int32_t value)
*/
static inline void cvmx_fau_atomic_write16(cvmx_fau_reg_16_t reg, int16_t value)
{
+ reg ^= SWIZZLE_16;
cvmx_write64_int16(__cvmx_fau_store_address(1, reg), value);
}
@@ -591,6 +612,7 @@ static inline void cvmx_fau_atomic_write16(cvmx_fau_reg_16_t reg, int16_t value)
*/
static inline void cvmx_fau_atomic_write8(cvmx_fau_reg_8_t reg, int8_t value)
{
+ reg ^= SWIZZLE_8;
cvmx_write64_int8(__cvmx_fau_store_address(1, reg), value);
}
OpenPOWER on IntegriCloud