introduce RISC-V headers

Change-Id: I9a8b6a1011cbefd4bd173852e7111e92efd0c730 Reviewed-on: https://review.haiku-os.org/c/haiku/+/4003 Reviewed-by: Alex von Gluck IV <[email protected]>
2021-05-27 15:43:19 +00:00
parent 1b41be049b
commit b8b1ad6fc4
4 changed files with 405 additions and 29 deletions
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2021, Haiku, Inc.
+ * Distributed under the terms of the MIT License.
+ */
+
+#ifndef _CLINT_H_
+#define _CLINT_H_
+
+#include <SupportDefs.h>
+
+
+// core local interruptor
+struct ClintRegs
+{
+	uint8  unknown1[0x4000];
+	uint64 mTimeCmp[4095]; // per CPU core, but not implemented in temu
+	uint64 mTime;          // @0xBFF8
+};
+
+extern ClintRegs* volatile gClintRegs;
+
+
+#endif	// _CLINT_H_
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2021, Haiku, Inc.
+ * Distributed under the terms of the MIT License.
+ */
+
+#ifndef _HTIF_H_
+#define _HTIF_H_
+
+#include <SupportDefs.h>
+
+
+// host-target interface
+struct HtifRegs
+{
+	uint32 toHostLo;
+	uint32 toHostHi;
+	uint32 fromHostLo;
+	uint32 fromHostHi;
+};
+
+
+extern HtifRegs* volatile gHtifRegs;
+
+
+uint64 HtifCmd(uint32 device, uint8 cmd, uint32 arg);
+
+void HtifShutdown();
+void HtifOutChar(char ch);
+void HtifOutString(const char* str);
+void HtifOutString(const char* str, size_t len);
+
+
+#endif	// _HTIF_H_
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2021, Haiku, Inc.
+ * Distributed under the terms of the MIT License.
+ */
+
+#ifndef _PLIC_H_
+#define _PLIC_H_
+
+#include <SupportDefs.h>
+
+
+// platform-level interrupt controller
+struct PlicRegs
+{
+	// context = hart * 2 + mode, mode: 0 - machine, 1 - supervisor
+	uint32 priority[1024];           // 0x000000
+	uint32 pending[1024 / 32];       // 0x001000, bitfield
+	uint8  unused1[0x2000 - 0x1080];
+	uint32 enable[15872][1024 / 32]; // 0x002000, bitfield, [context][enable]
+	uint8  unused2[0xe000];
+	struct {
+		uint32 priorityThreshold;
+		uint32 claimAndComplete;
+		uint8  unused[0xff8];
+	} contexts[15872];               // 0x200000
+};
+
+extern PlicRegs* volatile gPlicRegs;
+
+
+#endif	// _PLIC_H_