1 /*-
2 * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
3 * All rights reserved.
4 *
5 * Portions of this software were developed by SRI International and the
6 * University of Cambridge Computer Laboratory under DARPA/AFRL contract
7 * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
8 *
9 * Portions of this software were developed by the University of Cambridge
10 * Computer Laboratory as part of the CTSRD Project, with support from the
11 * UK Higher Education Innovation Fund (HEIF).
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $FreeBSD: releng/11.0/sys/riscv/include/cpu.h 292407 2015-12-17 18:44:30Z br $
35 */
36
37 #ifndef _MACHINE_CPU_H_
38 #define _MACHINE_CPU_H_
39
40 #include <machine/atomic.h>
41 #include <machine/frame.h>
42
43 #define TRAPF_PC(tfp) ((tfp)->tf_ra)
44 #define TRAPF_USERMODE(tfp) (((tfp)->tf_sepc & (1ul << 63)) == 0)
45
46 #define cpu_getstack(td) ((td)->td_frame->tf_sp)
47 #define cpu_setstack(td, sp) ((td)->td_frame->tf_sp = (sp))
48 #define cpu_spinwait() /* nothing */
49
50 #ifdef _KERNEL
51
52 /*
53 * 0x0000 CPU ID unimplemented
54 * 0x0001 UC Berkeley Rocket repo
55 * 0x00020x7FFE Reserved for open-source repos
56 * 0x7FFF Reserved for extension
57 * 0x8000 Reserved for anonymous source
58 * 0x80010xFFFE Reserved for proprietary implementations
59 * 0xFFFF Reserved for extension
60 */
61
62 #define CPU_IMPL_SHIFT 0
63 #define CPU_IMPL_MASK (0xffff << CPU_IMPL_SHIFT)
64 #define CPU_IMPL(mimpid) ((mimpid & CPU_IMPL_MASK) >> CPU_IMPL_SHIFT)
65 #define CPU_IMPL_UNIMPLEMEN 0x0
66 #define CPU_IMPL_UCB_ROCKET 0x1
67
68 #define CPU_PART_SHIFT 62
69 #define CPU_PART_MASK (0x3ul << CPU_PART_SHIFT)
70 #define CPU_PART(mcpuid) ((mcpuid & CPU_PART_MASK) >> CPU_PART_SHIFT)
71 #define CPU_PART_RV32I 0x0
72 #define CPU_PART_RV32E 0x1
73 #define CPU_PART_RV64I 0x2
74 #define CPU_PART_RV128I 0x3
75
76 extern char btext[];
77 extern char etext[];
78
79 void cpu_halt(void) __dead2;
80 void cpu_reset(void) __dead2;
81 void fork_trampoline(void);
82 void identify_cpu(void);
83 void swi_vm(void *v);
84
85 static __inline uint64_t
86 get_cyclecount(void)
87 {
88
89 /* TODO: This is bogus */
90 return (1);
91 }
92
93 #endif
94
95 #endif /* !_MACHINE_CPU_H_ */
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