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 * $FreeBSD$ 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_ */ 96