From e90b72ec3082588b296956730bd2930cf8d5d671 Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Fri, 10 Jul 2026 11:31:46 +0800
Subject: refactor: promote new architecture to repository root

Archive the deprecated implementation under lume-legacy, make the new kernel the default root-level build, and update repository entry points without changing kernel behavior.
---
 lume-legacy/src/kernel/sbi.cc | 52 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 lume-legacy/src/kernel/sbi.cc

(limited to 'lume-legacy/src/kernel/sbi.cc')

diff --git a/lume-legacy/src/kernel/sbi.cc b/lume-legacy/src/kernel/sbi.cc
new file mode 100644
index 0000000..5ae7edb
--- /dev/null
+++ b/lume-legacy/src/kernel/sbi.cc
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2026 Richard QIn
+ */
+#include "common/types.h"
+#include "kernel/sbi.h"
+
+namespace SBI
+{
+    struct sbiret
+    {
+        long error;
+        long value;
+    };
+
+    struct sbiret sbi_call(int ext, int fid, uint64 arg0, uint64 arg1, uint64 arg2)
+    {
+        struct sbiret ret;
+        register uint64 a0 asm("a0") = arg0;
+        register uint64 a1 asm("a1") = arg1;
+        register uint64 a2 asm("a2") = arg2;
+        register uint64 a6 asm("a6") = fid;
+        register uint64 a7 asm("a7") = ext;
+
+        asm volatile(
+            "ecall"
+            : "=r"(a0), "=r"(a1)
+            : "r"(a0), "r"(a1), "r"(a2), "r"(a6), "r"(a7)
+            : "memory");
+        ret.error = a0;
+        ret.value = a1;
+        return ret;
+    }
+
+    void set_timer(uint64 stime_value)
+    {
+        sbi_call(0x54494D45, 0, stime_value, 0, 0);
+    }
+
+    void sbi_shutdown()
+    {
+        sbi_call(0x53525354, 0, 0, 0, 0);
+        sbi_call(0x08, 0, 0, 0, 0);
+        while (1)
+            ;
+    }
+
+    void sbi_reboot()
+    {
+        sbi_call(SBI_EID_SRST, SBI_FID_SRST_RESET, SBI_SRST_TYPE_COLD_REBOOT, SBI_SRST_REASON_NONE, 0);
+    }
+}
\ No newline at end of file
-- 
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