Add assembler helper to calculate PMF timestamp offset
Given the service name and timestamp id, this assembler macro
calculates the offset into a memory region where the per-cpu timestamp
value is located.
Change-Id: I47f6dfa2a17be182675e2ca0489d6eed42433209
diff --git a/include/lib/pmf/pmf_asm_macros.S b/include/lib/pmf/pmf_asm_macros.S
new file mode 100644
index 0000000..42dcd79
--- /dev/null
+++ b/include/lib/pmf/pmf_asm_macros.S
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __PMF_ASM_MACROS_S__
+#define __PMF_ASM_MACROS_S__
+
+#define PMF_TS_SIZE 8
+
+ /*
+ * This macro calculates the offset into the memory
+ * region where the per-cpu timestamp value is stored
+ * for the given service name and timestamp id.
+ * Clobbers: x0 - x9
+ */
+ .macro pmf_calc_timestamp_offset _name _tid
+ mov x9, x30
+ bl plat_my_core_pos
+ mov x30, x9
+ ldr x1, =__PERCPU_TIMESTAMP_SIZE__
+ mov x2, #(\_tid * PMF_TS_SIZE)
+ madd x0, x0, x1, x2
+ ldr x1, =pmf_ts_mem_\_name
+ add x0, x0, x1
+ .endm
+
+#endif /* __PMF_ASM_MACROS_S__ */