xref: /haiku/headers/private/kernel/arch/riscv64/Plic.h (revision 7323d0a21daaded71c6231c5b7bcba9db4024a40)
1 /*
2  * Copyright 2021, Haiku, Inc.
3  * Distributed under the terms of the MIT License.
4  */
5 
6 #ifndef _PLIC_H_
7 #define _PLIC_H_
8 
9 #include <SupportDefs.h>
10 
11 
12 // platform-level interrupt controller
13 struct PlicRegs
14 {
15 	// context = hart * 2 + mode, mode: 0 - machine, 1 - supervisor
16 	uint32 priority[1024];           // 0x000000
17 	uint32 pending[1024 / 32];       // 0x001000, bitfield
18 	uint8  unused1[0x2000 - 0x1080];
19 	uint32 enable[15872][1024 / 32]; // 0x002000, bitfield, [context][enable]
20 	uint8  unused2[0xe000];
21 	struct {
22 		uint32 priorityThreshold;
23 		uint32 claimAndComplete;
24 		uint8  unused[0xff8];
25 	} contexts[15872];               // 0x200000
26 };
27 
28 extern PlicRegs* volatile gPlicRegs;
29 
30 
31 #endif	// _PLIC_H_
32