diff options
Diffstat (limited to 'arch/sh/lib64/page_copy.S')
| -rw-r--r-- | arch/sh/lib64/page_copy.S | 56 |
1 files changed, 27 insertions, 29 deletions
diff --git a/arch/sh/lib64/page_copy.S b/arch/sh/lib64/page_copy.S index e159c3cd258..0ec6fca63b5 100644 --- a/arch/sh/lib64/page_copy.S +++ b/arch/sh/lib64/page_copy.S @@ -10,8 +10,8 @@ of SH5-101 cut2 eval chip with Cayman board DDR memory. Parameters: - r2 : source effective address (start of page) - r3 : destination effective address (start of page) + r2 : destination effective address (start of page) + r3 : source effective address (start of page) Always copies 4096 bytes. @@ -27,10 +27,10 @@ .little .balign 8 - .global sh64_page_copy -sh64_page_copy: + .global copy_page +copy_page: - /* Copy 4096 bytes worth of data from r2 to r3. + /* Copy 4096 bytes worth of data from r3 to r2. Do prefetches 4 lines ahead. Do alloco 2 lines ahead */ @@ -41,21 +41,21 @@ sh64_page_copy: #if 0 /* TAKum03020 */ - ld.q r2, 0x00, r63 - ld.q r2, 0x20, r63 - ld.q r2, 0x40, r63 - ld.q r2, 0x60, r63 + ld.q r3, 0x00, r63 + ld.q r3, 0x20, r63 + ld.q r3, 0x40, r63 + ld.q r3, 0x60, r63 #endif - alloco r3, 0x00 + alloco r2, 0x00 synco ! TAKum03020 - alloco r3, 0x20 + alloco r2, 0x20 synco ! TAKum03020 movi 3968, r6 - add r3, r6, r6 + add r2, r6, r6 addi r6, 64, r7 addi r7, 64, r8 - sub r2, r3, r60 + sub r3, r2, r60 addi r60, 8, r61 addi r61, 8, r62 addi r62, 8, r23 @@ -67,25 +67,23 @@ sh64_page_copy: 1: #if 0 /* TAKum03020 */ - bge/u r3, r6, tr2 ! skip prefetch for last 4 lines - ldx.q r3, r22, r63 ! prefetch 4 lines hence + bge/u r2, r6, tr2 ! skip prefetch for last 4 lines + ldx.q r2, r22, r63 ! prefetch 4 lines hence #endif 2: - bge/u r3, r7, tr3 ! skip alloco for last 2 lines - alloco r3, 0x40 ! alloc destination line 2 lines ahead + bge/u r2, r7, tr3 ! skip alloco for last 2 lines + alloco r2, 0x40 ! alloc destination line 2 lines ahead synco ! TAKum03020 3: - ldx.q r3, r60, r36 - ldx.q r3, r61, r37 - ldx.q r3, r62, r38 - ldx.q r3, r23, r39 - st.q r3, 0, r36 - st.q r3, 8, r37 - st.q r3, 16, r38 - st.q r3, 24, r39 - addi r3, 32, r3 - bgt/l r8, r3, tr1 + ldx.q r2, r60, r36 + ldx.q r2, r61, r37 + ldx.q r2, r62, r38 + ldx.q r2, r23, r39 + st.q r2, 0, r36 + st.q r2, 8, r37 + st.q r2, 16, r38 + st.q r2, 24, r39 + addi r2, 32, r2 + bgt/l r8, r2, tr1 blink tr0, r63 ! return - - |