1 /*- 2 * Copyright (c) 2001 Jake Burkholder. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _MACHINE_PCB_H_ 30 #define _MACHINE_PCB_H_ 31 32 #ifndef LOCORE 33 34 #include <machine/debug_monitor.h> 35 #include <machine/vfp.h> 36 37 struct trapframe; 38 39 /* The first register in pcb_x is x19 */ 40 #define PCB_X_START 19 41 42 #define PCB_X19 0 43 #define PCB_X20 1 44 #define PCB_FP 10 45 #define PCB_LR 11 46 47 struct pcb { 48 uint64_t pcb_x[12]; 49 /* These two need to be in order as we access them together */ 50 uint64_t pcb_sp; 51 uint64_t pcb_tpidr_el0; 52 uint64_t pcb_tpidrro_el0; 53 54 /* Fault handler, the error value is passed in x0 */ 55 vm_offset_t pcb_onfault; 56 57 u_int pcb_flags; 58 #define PCB_SINGLE_STEP_SHIFT 0 59 #define PCB_SINGLE_STEP (1 << PCB_SINGLE_STEP_SHIFT) 60 uint32_t pcb_pad1; 61 62 struct vfpstate *pcb_fpusaved; 63 int pcb_fpflags; 64 #define PCB_FP_STARTED 0x00000001 65 #define PCB_FP_KERN 0x40000000 66 #define PCB_FP_NOSAVE 0x80000000 67 /* The bits passed to userspace in get_fpcontext */ 68 #define PCB_FP_USERMASK (PCB_FP_STARTED) 69 u_int pcb_vfpcpu; /* Last cpu this thread ran VFP code */ 70 uint64_t pcb_reserved[5]; 71 72 /* 73 * The userspace VFP state. The pcb_fpusaved pointer will point to 74 * this unless the kernel has allocated a VFP context. 75 * Place last to simplify the asm to access the rest if the struct. 76 */ 77 struct vfpstate pcb_fpustate; 78 79 struct debug_monitor_state pcb_dbg_regs; 80 }; 81 82 #ifdef _KERNEL 83 void makectx(struct trapframe *tf, struct pcb *pcb); 84 int savectx(struct pcb *pcb) __returns_twice; 85 #endif 86 87 #endif /* !LOCORE */ 88 89 #endif /* !_MACHINE_PCB_H_ */ 90