ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/arch/riscv/kernel/mcount-dyn.S b/marvell/linux/arch/riscv/kernel/mcount-dyn.S
new file mode 100644
index 0000000..35a6ed7
--- /dev/null
+++ b/marvell/linux/arch/riscv/kernel/mcount-dyn.S
@@ -0,0 +1,239 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2017 Andes Technology Corporation */
+
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <asm/asm.h>
+#include <asm/csr.h>
+#include <asm/unistd.h>
+#include <asm/thread_info.h>
+#include <asm/asm-offsets.h>
+#include <asm-generic/export.h>
+#include <asm/ftrace.h>
+
+ .text
+
+ .macro SAVE_ABI_STATE
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ addi sp, sp, -48
+ sd s0, 32(sp)
+ sd ra, 40(sp)
+ addi s0, sp, 48
+ sd t0, 24(sp)
+ sd t1, 16(sp)
+#ifdef HAVE_FUNCTION_GRAPH_FP_TEST
+ sd t2, 8(sp)
+#endif
+#else
+ addi sp, sp, -16
+ sd s0, 0(sp)
+ sd ra, 8(sp)
+ addi s0, sp, 16
+#endif
+ .endm
+
+ .macro RESTORE_ABI_STATE
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ ld s0, 32(sp)
+ ld ra, 40(sp)
+ addi sp, sp, 48
+#else
+ ld ra, 8(sp)
+ ld s0, 0(sp)
+ addi sp, sp, 16
+#endif
+ .endm
+
+ .macro RESTORE_GRAPH_ARGS
+ ld a0, 24(sp)
+ ld a1, 16(sp)
+#ifdef HAVE_FUNCTION_GRAPH_FP_TEST
+ ld a2, 8(sp)
+#endif
+ .endm
+
+ENTRY(ftrace_graph_caller)
+ addi sp, sp, -16
+ sd s0, 0(sp)
+ sd ra, 8(sp)
+ addi s0, sp, 16
+ftrace_graph_call:
+ .global ftrace_graph_call
+ /*
+ * Calling ftrace_enable/disable_ftrace_graph_caller would overwrite the
+ * call below. Check ftrace_modify_all_code for details.
+ */
+ call ftrace_stub
+ ld ra, 8(sp)
+ ld s0, 0(sp)
+ addi sp, sp, 16
+ ret
+ENDPROC(ftrace_graph_caller)
+
+ENTRY(ftrace_caller)
+ /*
+ * a0: the address in the caller when calling ftrace_caller
+ * a1: the caller's return address
+ * a2: the address of global variable function_trace_op
+ */
+ ld a1, -8(s0)
+ addi a0, ra, -MCOUNT_INSN_SIZE
+ la t5, function_trace_op
+ ld a2, 0(t5)
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ /*
+ * the graph tracer (specifically, prepare_ftrace_return) needs these
+ * arguments but for now the function tracer occupies the regs, so we
+ * save them in temporary regs to recover later.
+ */
+ addi t0, s0, -8
+ mv t1, a0
+#ifdef HAVE_FUNCTION_GRAPH_FP_TEST
+ ld t2, -16(s0)
+#endif
+#endif
+
+ SAVE_ABI_STATE
+ftrace_call:
+ .global ftrace_call
+ /*
+ * For the dynamic ftrace to work, here we should reserve at least
+ * 8 bytes for a functional auipc-jalr pair. The following call
+ * serves this purpose.
+ *
+ * Calling ftrace_update_ftrace_func would overwrite the nops below.
+ * Check ftrace_modify_all_code for details.
+ */
+ call ftrace_stub
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ RESTORE_GRAPH_ARGS
+ call ftrace_graph_caller
+#endif
+
+ RESTORE_ABI_STATE
+ ret
+ENDPROC(ftrace_caller)
+
+#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
+ .macro SAVE_ALL
+ addi sp, sp, -(PT_SIZE_ON_STACK+16)
+ sd s0, (PT_SIZE_ON_STACK)(sp)
+ sd ra, (PT_SIZE_ON_STACK+8)(sp)
+ addi s0, sp, (PT_SIZE_ON_STACK+16)
+
+ sd x1, PT_RA(sp)
+ sd x2, PT_SP(sp)
+ sd x3, PT_GP(sp)
+ sd x4, PT_TP(sp)
+ sd x5, PT_T0(sp)
+ sd x6, PT_T1(sp)
+ sd x7, PT_T2(sp)
+ sd x8, PT_S0(sp)
+ sd x9, PT_S1(sp)
+ sd x10, PT_A0(sp)
+ sd x11, PT_A1(sp)
+ sd x12, PT_A2(sp)
+ sd x13, PT_A3(sp)
+ sd x14, PT_A4(sp)
+ sd x15, PT_A5(sp)
+ sd x16, PT_A6(sp)
+ sd x17, PT_A7(sp)
+ sd x18, PT_S2(sp)
+ sd x19, PT_S3(sp)
+ sd x20, PT_S4(sp)
+ sd x21, PT_S5(sp)
+ sd x22, PT_S6(sp)
+ sd x23, PT_S7(sp)
+ sd x24, PT_S8(sp)
+ sd x25, PT_S9(sp)
+ sd x26, PT_S10(sp)
+ sd x27, PT_S11(sp)
+ sd x28, PT_T3(sp)
+ sd x29, PT_T4(sp)
+ sd x30, PT_T5(sp)
+ sd x31, PT_T6(sp)
+ .endm
+
+ .macro RESTORE_ALL
+ ld x1, PT_RA(sp)
+ ld x2, PT_SP(sp)
+ ld x3, PT_GP(sp)
+ ld x4, PT_TP(sp)
+ ld x5, PT_T0(sp)
+ ld x6, PT_T1(sp)
+ ld x7, PT_T2(sp)
+ ld x8, PT_S0(sp)
+ ld x9, PT_S1(sp)
+ ld x10, PT_A0(sp)
+ ld x11, PT_A1(sp)
+ ld x12, PT_A2(sp)
+ ld x13, PT_A3(sp)
+ ld x14, PT_A4(sp)
+ ld x15, PT_A5(sp)
+ ld x16, PT_A6(sp)
+ ld x17, PT_A7(sp)
+ ld x18, PT_S2(sp)
+ ld x19, PT_S3(sp)
+ ld x20, PT_S4(sp)
+ ld x21, PT_S5(sp)
+ ld x22, PT_S6(sp)
+ ld x23, PT_S7(sp)
+ ld x24, PT_S8(sp)
+ ld x25, PT_S9(sp)
+ ld x26, PT_S10(sp)
+ ld x27, PT_S11(sp)
+ ld x28, PT_T3(sp)
+ ld x29, PT_T4(sp)
+ ld x30, PT_T5(sp)
+ ld x31, PT_T6(sp)
+
+ ld s0, (PT_SIZE_ON_STACK)(sp)
+ ld ra, (PT_SIZE_ON_STACK+8)(sp)
+ addi sp, sp, (PT_SIZE_ON_STACK+16)
+ .endm
+
+ .macro RESTORE_GRAPH_REG_ARGS
+ ld a0, PT_T0(sp)
+ ld a1, PT_T1(sp)
+#ifdef HAVE_FUNCTION_GRAPH_FP_TEST
+ ld a2, PT_T2(sp)
+#endif
+ .endm
+
+/*
+ * Most of the contents are the same as ftrace_caller.
+ */
+ENTRY(ftrace_regs_caller)
+ /*
+ * a3: the address of all registers in the stack
+ */
+ ld a1, -8(s0)
+ addi a0, ra, -MCOUNT_INSN_SIZE
+ la t5, function_trace_op
+ ld a2, 0(t5)
+ addi a3, sp, -(PT_SIZE_ON_STACK+16)
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ addi t0, s0, -8
+ mv t1, a0
+#ifdef HAVE_FUNCTION_GRAPH_FP_TEST
+ ld t2, -16(s0)
+#endif
+#endif
+ SAVE_ALL
+
+ftrace_regs_call:
+ .global ftrace_regs_call
+ call ftrace_stub
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ RESTORE_GRAPH_REG_ARGS
+ call ftrace_graph_caller
+#endif
+
+ RESTORE_ALL
+ ret
+ENDPROC(ftrace_regs_caller)
+#endif /* CONFIG_DYNAMIC_FTRACE_WITH_REGS */