1 files changed, 122 insertions, 0 deletions
diff --git a/src/arch/arm64/include/arch/smc.h b/src/arch/arm64/include/arch/smc.h
new file mode 100644
index 0000000000..288459e6ba
--- /dev/null
+++ b/src/arch/arm64/include/arch/smc.h
@@ -0,0 +1,122 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ */
+
+#ifndef __ARCH_SMC_H__
+#define __ARCH_SMC_H__
+
+#include <stdint.h>
+
+enum {
+	FUNC_ID_CALL_TYPE_SHIFT = 31,
+	FUNC_ID_CALL_TYPE_MASK = (1 << FUNC_ID_CALL_TYPE_SHIFT),
+	FUNC_ID_FASTCALL = (1 << FUNC_ID_CALL_TYPE_SHIFT),
+	FUNC_ID_STDCALL = (0 << FUNC_ID_CALL_TYPE_SHIFT),
+
+	FUNC_ID_CALL_CONVENTION_SHIFT = 30,
+	FUNC_ID_CALL_CONVENTION_MASK = (1 << FUNC_ID_CALL_CONVENTION_SHIFT),
+	FUNC_ID_SMC32 = (0 << FUNC_ID_CALL_CONVENTION_SHIFT),
+	FUNC_ID_SMC64 = (1 << FUNC_ID_CALL_CONVENTION_SHIFT),
+
+	FUNC_ID_ENTITY_SHIFT = 24,
+	FUNC_ID_ENTITY_MASK = (0x3f << FUNC_ID_ENTITY_SHIFT),
+
+	FUNC_ID_FUNC_NUMBER_SHIFT = 0,
+	FUNC_ID_FUNC_NUMBER_MASK = (0xffff << FUNC_ID_FUNC_NUMBER_SHIFT),
+
+	FUNC_ID_MASK = FUNC_ID_CALL_TYPE_MASK | FUNC_ID_CALL_CONVENTION_MASK |
+	               FUNC_ID_ENTITY_MASK | FUNC_ID_FUNC_NUMBER_MASK,
+
+	SMC_NUM_ARGS = 8, /* The last is optional hypervisor id. */
+	SMC_NUM_RESULTS = 4,
+
+	SMC_UNKNOWN_FUNC = 0xffffffff,
+};
+
+#define SMC_FUNC(entity, number, call_convention, call_type) \
+	((call_type) | (call_convention) | \
+		((entity) << FUNC_ID_ENTITY_SHIFT) | (number))
+
+#define SMC_FUNC_FAST(entity, number, call_convention) \
+	SMC_FUNC((entity), (number), (call_convention), FUNC_ID_FASTCALL)
+
+#define SMC_FUNC_FAST32(entity, number) \
+	SMC_FUNC_FAST((entity), (number), FUNC_ID_SMC32)
+
+#define SMC_FUNC_FAST64(entity, number) \
+	SMC_FUNC_FAST((entity), (number), FUNC_ID_SMC64)
+
+struct smc_call {
+	uint64_t args[SMC_NUM_ARGS];
+	uint64_t results[SMC_NUM_RESULTS];
+};
+
+/* SMC immediate value needs to be 0. */
+/* Check mod AARCHx mode against calling convention. */
+
+static inline uint64_t smc64_arg(const struct smc_call *smc, unsigned i)
+{
+	return smc->args[i];
+}
+
+static inline uint32_t smc32_arg(const struct smc_call *smc, unsigned i)
+{
+	return smc64_arg(smc, i);
+}
+
+static inline void smc64_result(struct smc_call *smc, unsigned i, uint64_t v)
+{
+	smc->results[i] = v;
+}
+
+static inline void smc32_result(struct smc_call *smc, unsigned i, uint32_t v)
+{
+	uint64_t v64 = v;
+	smc64_result(smc, i, v64);
+}
+
+static inline void smc32_return(struct smc_call *smc, int32_t v)
+{
+	smc32_result(smc, 0, v);
+}
+
+static inline uint32_t smc_hypervisor_id(const struct smc_call *smc)
+{
+	/* Set in W7 */
+	return smc32_arg(smc, 7);
+}
+
+static inline uint32_t smc_session_id(const struct smc_call *smc)
+{
+	/* Set in W6 */
+	return smc32_arg(smc, 6);
+}
+
+static inline uint32_t smc_function_id(const struct smc_call *smc)
+{
+	/* Function ID in W0. */
+	return smc32_arg(smc, 0)  & FUNC_ID_MASK;
+}
+
+/* Initialize the SMC layer. */
+void smc_init(void);
+
+/* Register a handler for a given function range, inclusive. */
+int smc_register_range(uint32_t min, uint32_t max, int (*)(struct smc_call *));
+
+#endif /* __ARCH_SMC_H__ */