MIPS: lib: memcpy: Split source and destination prefetch macros

In preparation for EVA support, the PREF macro is split into two
separate macros, PREFS and PREFD, for source and destination data
prefetching respectively.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>

1 files changed, 22 insertions, 14 deletions

diff --git a/arch/mips/lib/memcpy.S b/arch/mips/lib/memcpy.S
index ab9f04641640..eed6e07bf222 100644
--- a/arch/mips/lib/memcpy.S
+++ b/arch/mips/lib/memcpy.S
@@ -89,6 +89,9 @@
 /* Instruction type */
 #define LD_INSN 1
 #define ST_INSN 2
+/* Pretech type */
+#define SRC_PREFETCH 1
+#define DST_PREFETCH 2
 
 /*
  * Wrapper to add an entry in the exception table
@@ -174,6 +177,11 @@
 #define LOADB(reg, addr, handler)       EXC(lb, LD_INSN, reg, addr, handler)
 #define STOREB(reg, addr, handler)      EXC(sb, ST_INSN, reg, addr, handler)
 
+#define _PREF(hint, addr, type)         PREF(hint, addr)
+
+#define PREFS(hint, addr) _PREF(hint, addr, SRC_PREFETCH)
+#define PREFD(hint, addr) _PREF(hint, addr, DST_PREFETCH)
+
 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 #define LDFIRST LOADR
 #define LDREST  LOADL
@@ -237,16 +245,16 @@ __copy_user_common:
          *
          * If len < NBYTES use byte operations.
          */
-        PREF(   0, 0(src) )
-        PREF(   1, 0(dst) )
+        PREFS(  0, 0(src) )
+        PREFD(  1, 0(dst) )
         sltu    t2, len, NBYTES
         and     t1, dst, ADDRMASK
-        PREF(   0, 1*32(src) )
-        PREF(   1, 1*32(dst) )
+        PREFS(  0, 1*32(src) )
+        PREFD(  1, 1*32(dst) )
         bnez    t2, .Lcopy_bytes_checklen
          and    t0, src, ADDRMASK
-        PREF(   0, 2*32(src) )
-        PREF(   1, 2*32(dst) )
+        PREFS(  0, 2*32(src) )
+        PREFD(  1, 2*32(dst) )
         bnez    t1, .Ldst_unaligned
          nop
         bnez    t0, .Lsrc_unaligned_dst_aligned
@@ -258,8 +266,8 @@ __copy_user_common:
          SRL    t0, len, LOG_NBYTES+3    # +3 for 8 units/iter
         beqz    t0, .Lcleanup_both_aligned # len < 8*NBYTES
          and    rem, len, (8*NBYTES-1)   # rem = len % (8*NBYTES)
-        PREF(   0, 3*32(src) )
-        PREF(   1, 3*32(dst) )
+        PREFS(  0, 3*32(src) )
+        PREFD(  1, 3*32(dst) )
         .align  4
 1:
         R10KCBARRIER(0(ra))
@@ -282,8 +290,8 @@ __copy_user_common:
         STORE(t7, UNIT(-3)(dst), .Ls_exc_p3u)
         STORE(t0, UNIT(-2)(dst), .Ls_exc_p2u)
         STORE(t1, UNIT(-1)(dst), .Ls_exc_p1u)
-        PREF(   0, 8*32(src) )
-        PREF(   1, 8*32(dst) )
+        PREFS(  0, 8*32(src) )
+        PREFD(  1, 8*32(dst) )
         bne     len, rem, 1b
          nop
 
@@ -378,10 +386,10 @@ __copy_user_common:
 
 .Lsrc_unaligned_dst_aligned:
         SRL     t0, len, LOG_NBYTES+2    # +2 for 4 units/iter
-        PREF(   0, 3*32(src) )
+        PREFS(  0, 3*32(src) )
         beqz    t0, .Lcleanup_src_unaligned
          and    rem, len, (4*NBYTES-1)   # rem = len % 4*NBYTES
-        PREF(   1, 3*32(dst) )
+        PREFD(  1, 3*32(dst) )
 1:
 /*
  * Avoid consecutive LD*'s to the same register since some mips
@@ -399,7 +407,7 @@ __copy_user_common:
         LDFIRST(t3, FIRST(3)(src), .Ll_exc_copy)
         LDREST(t2, REST(2)(src), .Ll_exc_copy)
         LDREST(t3, REST(3)(src), .Ll_exc_copy)
-        PREF(   0, 9*32(src) )          # 0 is PREF_LOAD  (not streamed)
+        PREFS(  0, 9*32(src) )          # 0 is PREF_LOAD  (not streamed)
         ADD     src, src, 4*NBYTES
 #ifdef CONFIG_CPU_SB1
         nop                             # improves slotting
@@ -408,7 +416,7 @@ __copy_user_common:
         STORE(t1, UNIT(1)(dst), .Ls_exc_p3u)
         STORE(t2, UNIT(2)(dst), .Ls_exc_p2u)
         STORE(t3, UNIT(3)(dst), .Ls_exc_p1u)
-        PREF(   1, 9*32(dst) )          # 1 is PREF_STORE (not streamed)
+        PREFD(  1, 9*32(dst) )          # 1 is PREF_STORE (not streamed)
         .set    reorder                         /* DADDI_WAR */
         ADD     dst, dst, 4*NBYTES
         bne     len, rem, 1b