1 files changed, 98 insertions, 0 deletions
diff --git a/lib/sbi_ecall.c b/lib/sbi_ecall.c
new file mode 100644
index 0000000..928a8b7
--- /dev/null
+++ b/lib/sbi_ecall.c
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2018 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ *   Anup Patel <anup.patel@wdc.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <sbi/sbi_console.h>
+#include <sbi/sbi_ecall.h>
+#include <sbi/sbi_error.h>
+#include <sbi/sbi_ipi.h>
+#include <sbi/sbi_system.h>
+#include <sbi/sbi_timer.h>
+#include <sbi/sbi_trap.h>
+
+#define SBI_ECALL_VERSION_MAJOR			0
+#define SBI_ECALL_VERSION_MINOR			1
+
+#define SBI_ECALL_SET_TIMER			0
+#define SBI_ECALL_CONSOLE_PUTCHAR		1
+#define SBI_ECALL_CONSOLE_GETCHAR		2
+#define SBI_ECALL_CLEAR_IPI			3
+#define SBI_ECALL_SEND_IPI			4
+#define SBI_ECALL_REMOTE_FENCE_I		5
+#define SBI_ECALL_REMOTE_SFENCE_VMA		6
+#define SBI_ECALL_REMOTE_SFENCE_VMA_ASID	7
+#define SBI_ECALL_SHUTDOWN			8
+
+u16 sbi_ecall_version_major(void)
+{
+	return SBI_ECALL_VERSION_MAJOR;
+}
+
+u16 sbi_ecall_version_minor(void)
+{
+	return SBI_ECALL_VERSION_MINOR;
+}
+
+int sbi_ecall_handler(u32 hartid, ulong mcause,
+		      struct sbi_trap_regs *regs,
+		      struct sbi_scratch *scratch)
+{
+	int ret = SBI_ENOTSUPP;
+
+	switch (regs->a7) {
+	case SBI_ECALL_SET_TIMER:
+#if __riscv_xlen == 32
+		sbi_timer_event_start(scratch, hartid,
+			(((u64)regs->a1 << 32) || (u64)regs->a0));
+#else
+		sbi_timer_event_start(scratch, hartid, (u64)regs->a0);
+#endif
+		ret = 0;
+		break;
+	case SBI_ECALL_CONSOLE_PUTCHAR:
+		sbi_putc(regs->a0);
+		ret = 0;
+		break;
+	case SBI_ECALL_CONSOLE_GETCHAR:
+		regs->a0 = sbi_getc();
+		ret = 0;
+		break;
+	case SBI_ECALL_CLEAR_IPI:
+		sbi_ipi_clear_smode(scratch, hartid);
+		ret = 0;
+		break;
+	case SBI_ECALL_SEND_IPI:
+		ret = sbi_ipi_send_many(scratch, hartid,
+					(ulong *)regs->a0,
+					SBI_IPI_EVENT_SOFT);
+		break;
+	case SBI_ECALL_REMOTE_FENCE_I:
+		ret = sbi_ipi_send_many(scratch, hartid,
+					(ulong *)regs->a0,
+					SBI_IPI_EVENT_FENCE_I);
+		break;
+	case SBI_ECALL_REMOTE_SFENCE_VMA:
+	case SBI_ECALL_REMOTE_SFENCE_VMA_ASID:
+		ret = sbi_ipi_send_many(scratch, hartid,
+					(ulong *)regs->a0,
+					SBI_IPI_EVENT_SFENCE_VMA);
+		break;
+	case SBI_ECALL_SHUTDOWN:
+		sbi_system_shutdown(scratch, 0);
+		ret = 0;
+		break;
+	default:
+		break;
+	};
+
+	if (!ret) {
+		regs->mepc += 4;
+	}
+
+	return ret;
+}