sparc64: Add CRC32C driver making use of the new crc32c opcode.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 29 insertions, 0 deletions

diff --git a/arch/sparc/crypto/crc32c_asm.S b/arch/sparc/crypto/crc32c_asm.S
new file mode 100644
index 000000000000..cb479ec72433
--- /dev/null
+++ b/arch/sparc/crypto/crc32c_asm.S
@@ -0,0 +1,29 @@
+#include <linux/linkage.h>
+#include <asm/visasm.h>
+#include <asm/asi.h>
+
+#define F3F(x,y,z)      (((x)<<30)|((y)<<19)|((z)<<5))
+
+#define FPD_ENCODE(x)   (((x) >> 5) | ((x) & ~(0x20)))
+
+#define RS1(x)          (FPD_ENCODE(x) << 14)
+#define RS2(x)          (FPD_ENCODE(x) <<  0)
+#define RD(x)           (FPD_ENCODE(x) << 25)
+
+#define CRC32C(a,b,c)   \
+        .word           (F3F(2,0x36,0x147)|RS1(a)|RS2(b)|RD(c));
+
+ENTRY(crc32c_sparc64)
+        /* %o0=crc32p, %o1=data_ptr, %o2=len */
+        VISEntryHalf
+        lda     [%o0] ASI_PL, %f1
+1:      ldd     [%o1], %f2
+        CRC32C(0,2,0)
+        subcc   %o2, 8, %o2
+        bne,pt  %icc, 1b
+         add    %o1, 0x8, %o1
+        sta     %f1, [%o0] ASI_PL
+        VISExitHalf
+2:      retl
+         nop
+ENDPROC(crc32c_sparc64)