From af1ce4b2e637ceb418ea72d51c49a3eee276a938 Mon Sep 17 00:00:00 2001
From: stefan <stefan@s00.xyz>
Date: Sat, 15 Apr 2023 05:02:02 +0000
Subject: added multiprocessor support

---
 sys/include/sbi.h | 74 +++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 67 insertions(+), 7 deletions(-)

(limited to 'sys/include/sbi.h')

diff --git a/sys/include/sbi.h b/sys/include/sbi.h
index 0dbcd02..1c0fc7f 100644
--- a/sys/include/sbi.h
+++ b/sys/include/sbi.h
@@ -1,16 +1,76 @@
-#ifndef _SBICALL_H
-#define _SBICALL_H
+#ifndef _SBI_H
+#define _SBI_H
 
 struct sbiret {
         long err;
         long val;
 };
 
-struct sbiret 	sbi_ecall(int _eid, int _fid, unsigned long _a0, unsigned long _a1, 
-               		unsigned long _a2, unsigned long _a3, unsigned long _a4, unsigned long _a5);
+#define SBI_SUCCESS	 	 0
+#define SBI_ERR_FAILED		-1
+#define SBI_ERR_NOT_SUPPORTED 	-2
+#define SBI_ERR_INVALD_PARAM	-3 
+#define SBI_ERR_DENIED		-4
+#define SBI_ERR_INVALID_ADDRESS	-5
+#define SBI_ERR_ALREADY_AVAILABLE -6
+#define SBI_ERR_ALREADY_STARTED -7
+#define SBI_ERR_ALREADY_STOPPED -8
 
-void    sbi_console_putchar(int c);
-void    sbi_shutdown(void);
+enum HART_STATUS {
+	STARTED,
+	STOPPED,
+	START_PENDING,
+	STOP_PENDING,
+	SUSPENDED,
+	SUSPEND_PENDING,
+	RESUME_PENDING
+};
+
+static inline struct sbiret 
+sbi_ecall(int ext, int fid, unsigned long arg0,
+                        unsigned long arg1, unsigned long arg2,
+                        unsigned long arg3, unsigned long arg4,
+                        unsigned long arg5)
+{
+        struct sbiret ret;
+
+        register unsigned long a0 asm ("a0") = (unsigned long)(arg0);
+        register unsigned long a1 asm ("a1") = (unsigned long)(arg1);
+        register unsigned long a2 asm ("a2") = (unsigned long)(arg2);
+        register unsigned long a3 asm ("a3") = (unsigned long)(arg3);
+        register unsigned long a4 asm ("a4") = (unsigned long)(arg4);
+        register unsigned long a5 asm ("a5") = (unsigned long)(arg5);
+        register unsigned long a6 asm ("a6") = (unsigned long)(fid);
+        register unsigned long a7 asm ("a7") = (unsigned long)(ext);
+        asm volatile ("ecall"
+                      : "+r" (a0), "+r" (a1)
+                      : "r" (a2), "r" (a3), "r" (a4), "r" (a5), "r" (a6), "r" (a7)
+                      : "memory");
+        ret.err = a0;
+        ret.val = a1;
+
+        return ret;
+}
+
+static inline void
+sbi_console_putchar(int c)
+{
+	sbi_ecall(1, 0, c, 0, 0, 0, 0, 0);
+}
+
+static inline void
+sbi_shutdown(void)
+{
+	sbi_ecall(8, 0, 0, 0, 0, 0, 0, 0);
+}
+
+static inline struct sbiret
+sbi_hart_start(unsigned long hartid, unsigned long start_addr, unsigned long opaque)
+{
+	struct sbiret r = sbi_ecall(0x48534D, 0, hartid, start_addr, opaque, 0, 0, 0);
+	return r;
+}
+#define _start_hart(tp, a)	sbi_hart_start(tp, a, 0);
 
-#endif /* _SBICALL_H */
+#endif /* _SBI_H */
 
-- 
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