[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/arm64/lib/bitops.S b/src/kernel/linux/v4.14/arch/arm64/lib/bitops.S
new file mode 100644
index 0000000..43ac736
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/arm64/lib/bitops.S
@@ -0,0 +1,76 @@
+/*
+ * Based on arch/arm/lib/bitops.h
+ *
+ * Copyright (C) 2013 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <asm/lse.h>
+
+/*
+ * x0: bits 5:0 bit offset
+ * bits 31:6 word offset
+ * x1: address
+ */
+ .macro bitop, name, llsc, lse
+ENTRY( \name )
+ and w3, w0, #63 // Get bit offset
+ eor w0, w0, w3 // Clear low bits
+ mov x2, #1
+ add x1, x1, x0, lsr #3 // Get word offset
+alt_lse " prfm pstl1strm, [x1]", "nop"
+ lsl x3, x2, x3 // Create mask
+
+alt_lse "1: ldxr x2, [x1]", "\lse x3, [x1]"
+alt_lse " \llsc x2, x2, x3", "nop"
+alt_lse " stxr w0, x2, [x1]", "nop"
+alt_lse " cbnz w0, 1b", "nop"
+
+ ret
+ENDPROC(\name )
+ .endm
+
+ .macro testop, name, llsc, lse
+ENTRY( \name )
+ and w3, w0, #63 // Get bit offset
+ eor w0, w0, w3 // Clear low bits
+ mov x2, #1
+ add x1, x1, x0, lsr #3 // Get word offset
+alt_lse " prfm pstl1strm, [x1]", "nop"
+ lsl x4, x2, x3 // Create mask
+
+alt_lse "1: ldxr x2, [x1]", "\lse x4, x2, [x1]"
+ lsr x0, x2, x3
+alt_lse " \llsc x2, x2, x4", "nop"
+alt_lse " stlxr w5, x2, [x1]", "nop"
+alt_lse " cbnz w5, 1b", "nop"
+alt_lse " dmb ish", "nop"
+
+ and x0, x0, #1
+ ret
+ENDPROC(\name )
+ .endm
+
+/*
+ * Atomic bit operations.
+ */
+ bitop change_bit, eor, steor
+ bitop clear_bit, bic, stclr
+ bitop set_bit, orr, stset
+
+ testop test_and_change_bit, eor, ldeoral
+ testop test_and_clear_bit, bic, ldclral
+ testop test_and_set_bit, orr, ldsetal