ARM: import arm-smccc code from Linux 4.11-rc6
Imports ARM SMC Calling Convention code from Linux 4.11-rc6.
The files have been copied as follows:
[Linux] [U-Boot]
arch/arm/kernel/smccc-call.S -> arch/arm/cpu/armv7/smccc-call.S
arch/arm64/kernel/smccc-call.S -> arch/arm/cpu/armv8/smccc-call.S
arch/arm/include/asm/opcodes* -> arch/arm/include/asm/opcodes*
include/linux/arm-smccc.h -> include/linux/arm-smccc.h
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/cpu/armv7/smccc-call.S b/arch/arm/cpu/armv7/smccc-call.S
new file mode 100644
index 0000000..e5d4306
--- /dev/null
+++ b/arch/arm/cpu/armv7/smccc-call.S
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2015, Linaro Limited
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+#include <linux/linkage.h>
+
+#include <asm/opcodes-sec.h>
+#include <asm/opcodes-virt.h>
+#include <asm/unwind.h>
+
+ /*
+ * Wrap c macros in asm macros to delay expansion until after the
+ * SMCCC asm macro is expanded.
+ */
+ .macro SMCCC_SMC
+ __SMC(0)
+ .endm
+
+ .macro SMCCC_HVC
+ __HVC(0)
+ .endm
+
+ .macro SMCCC instr
+UNWIND( .fnstart)
+ mov r12, sp
+ push {r4-r7}
+UNWIND( .save {r4-r7})
+ ldm r12, {r4-r7}
+ \instr
+ pop {r4-r7}
+ ldr r12, [sp, #(4 * 4)]
+ stm r12, {r0-r3}
+ bx lr
+UNWIND( .fnend)
+ .endm
+
+/*
+ * void smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2,
+ * unsigned long a3, unsigned long a4, unsigned long a5,
+ * unsigned long a6, unsigned long a7, struct arm_smccc_res *res,
+ * struct arm_smccc_quirk *quirk)
+ */
+ENTRY(__arm_smccc_smc)
+ SMCCC SMCCC_SMC
+ENDPROC(__arm_smccc_smc)
+
+/*
+ * void smccc_hvc(unsigned long a0, unsigned long a1, unsigned long a2,
+ * unsigned long a3, unsigned long a4, unsigned long a5,
+ * unsigned long a6, unsigned long a7, struct arm_smccc_res *res,
+ * struct arm_smccc_quirk *quirk)
+ */
+ENTRY(__arm_smccc_hvc)
+ SMCCC SMCCC_HVC
+ENDPROC(__arm_smccc_hvc)