From 749b0b093242a4c27f7c4f66121afd7852b2de48 Mon Sep 17 00:00:00 2001
From: Atish Patra <atish.patra@wdc.com>
Date: Tue, 18 Jun 2019 14:54:01 -0700
Subject: lib: Move sbi core library to lib/sbi

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Acked-by: Anup Patel <anup.patel@wdc.com>
---
 lib/sbi/sbi_ecall.c | 107 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 lib/sbi/sbi_ecall.c

(limited to 'lib/sbi/sbi_ecall.c')

diff --git a/lib/sbi/sbi_ecall.c b/lib/sbi/sbi_ecall.c
new file mode 100644
index 0000000..50c05d6
--- /dev/null
+++ b/lib/sbi/sbi_ecall.c
@@ -0,0 +1,107 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2019 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ *   Anup Patel <anup.patel@wdc.com>
+ */
+
+#include <sbi/sbi_console.h>
+#include <sbi/sbi_ecall.h>
+#include <sbi/sbi_ecall_interface.h>
+#include <sbi/sbi_error.h>
+#include <sbi/sbi_ipi.h>
+#include <sbi/sbi_system.h>
+#include <sbi/sbi_timer.h>
+#include <sbi/sbi_tlb.h>
+#include <sbi/sbi_trap.h>
+
+#define SBI_ECALL_VERSION_MAJOR 0
+#define SBI_ECALL_VERSION_MINOR 1
+
+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;
+	struct unpriv_trap uptrap;
+	struct sbi_tlb_info tlb_info;
+
+	switch (regs->a7) {
+	case SBI_ECALL_SET_TIMER:
+#if __riscv_xlen == 32
+		sbi_timer_event_start(scratch,
+				      (((u64)regs->a1 << 32) | (u64)regs->a0));
+#else
+		sbi_timer_event_start(scratch, (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);
+		ret = 0;
+		break;
+	case SBI_ECALL_SEND_IPI:
+		ret = sbi_ipi_send_many(scratch, &uptrap, (ulong *)regs->a0,
+					SBI_IPI_EVENT_SOFT, NULL);
+		break;
+	case SBI_ECALL_REMOTE_FENCE_I:
+		ret = sbi_ipi_send_many(scratch, &uptrap, (ulong *)regs->a0,
+					SBI_IPI_EVENT_FENCE_I, NULL);
+		break;
+	case SBI_ECALL_REMOTE_SFENCE_VMA:
+		tlb_info.start = (unsigned long)regs->a1;
+		tlb_info.size  = (unsigned long)regs->a2;
+		tlb_info.type  = SBI_TLB_FLUSH_VMA;
+
+		ret = sbi_ipi_send_many(scratch, &uptrap, (ulong *)regs->a0,
+					SBI_IPI_EVENT_SFENCE_VMA, &tlb_info);
+		break;
+	case SBI_ECALL_REMOTE_SFENCE_VMA_ASID:
+		tlb_info.start = (unsigned long)regs->a1;
+		tlb_info.size  = (unsigned long)regs->a2;
+		tlb_info.asid  = (unsigned long)regs->a3;
+		tlb_info.type  = SBI_TLB_FLUSH_VMA_ASID;
+
+		ret = sbi_ipi_send_many(scratch, &uptrap, (ulong *)regs->a0,
+					SBI_IPI_EVENT_SFENCE_VMA_ASID,
+					&tlb_info);
+		break;
+	case SBI_ECALL_SHUTDOWN:
+		sbi_system_shutdown(scratch, 0);
+		ret = 0;
+		break;
+	default:
+		regs->a0 = SBI_ENOTSUPP;
+		ret	 = 0;
+		break;
+	};
+
+	if (!ret) {
+		regs->mepc += 4;
+	} else if (ret == SBI_ETRAP) {
+		ret = 0;
+		sbi_trap_redirect(regs, scratch, regs->mepc,
+				  uptrap.cause, uptrap.tval);
+	}
+
+	return ret;
+}
-- 
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