1/* $NetBSD: arm32_machdep.c,v 1.44 2004/03/24 15:34:47 atatat Exp $ */ 2 3/*- 4 * Copyright (c) 2004 Olivier Houchard 5 * Copyright (c) 1994-1998 Mark Brinicombe. 6 * Copyright (c) 1994 Brini. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31#include "opt_ddb.h" 32 33#include <sys/param.h> 34#include <sys/proc.h> 35#include <sys/reg.h> 36#include <sys/systm.h> 37 38#include <machine/cpu.h> 39#include <machine/pcb.h> 40 41#ifdef DDB 42#include <ddb/ddb.h> 43 44DB_SHOW_COMMAND(cp15, db_show_cp15) 45{ 46 u_int reg; 47 48 reg = cp15_midr_get(); 49 db_printf("Cpu ID: 0x%08x\n", reg); 50 reg = cp15_ctr_get(); 51 db_printf("Current Cache Lvl ID: 0x%08x\n",reg); 52 53 reg = cp15_sctlr_get(); 54 db_printf("Ctrl: 0x%08x\n",reg); 55 reg = cp15_actlr_get(); 56 db_printf("Aux Ctrl: 0x%08x\n",reg); 57 58 reg = cp15_id_pfr0_get(); 59 db_printf("Processor Feat 0: 0x%08x\n", reg); 60 reg = cp15_id_pfr1_get(); 61 db_printf("Processor Feat 1: 0x%08x\n", reg); 62 reg = cp15_id_dfr0_get(); 63 db_printf("Debug Feat 0: 0x%08x\n", reg); 64 reg = cp15_id_afr0_get(); 65 db_printf("Auxiliary Feat 0: 0x%08x\n", reg); 66 reg = cp15_id_mmfr0_get(); 67 db_printf("Memory Model Feat 0: 0x%08x\n", reg); 68 reg = cp15_id_mmfr1_get(); 69 db_printf("Memory Model Feat 1: 0x%08x\n", reg); 70 reg = cp15_id_mmfr2_get(); 71 db_printf("Memory Model Feat 2: 0x%08x\n", reg); 72 reg = cp15_id_mmfr3_get(); 73 db_printf("Memory Model Feat 3: 0x%08x\n", reg); 74 reg = cp15_ttbr_get(); 75 db_printf("TTB0: 0x%08x\n", reg); 76} 77 78DB_SHOW_COMMAND(vtop, db_show_vtop) 79{ 80 u_int reg; 81 82 if (have_addr) { 83 cp15_ats1cpr_set(addr); 84 reg = cp15_par_get(); 85 db_printf("Physical address reg: 0x%08x\n",reg); 86 } else 87 db_printf("show vtop <virt_addr>\n"); 88} 89#endif /* DDB */ 90 91int 92fill_regs(struct thread *td, struct reg *regs) 93{ 94 struct trapframe *tf = td->td_frame; 95 bcopy(&tf->tf_r0, regs->r, sizeof(regs->r)); 96 regs->r_sp = tf->tf_usr_sp; 97 regs->r_lr = tf->tf_usr_lr; 98 regs->r_pc = tf->tf_pc; 99 regs->r_cpsr = tf->tf_spsr; 100 return (0); 101} 102 103int 104fill_fpregs(struct thread *td, struct fpreg *regs) 105{ 106#ifdef VFP 107 struct pcb *pcb; 108 109 pcb = td->td_pcb; 110 if ((pcb->pcb_fpflags & PCB_FP_STARTED) != 0) { 111 /* 112 * If we have just been running VFP instructions we will 113 * need to save the state to memcpy it below. 114 */ 115 if (td == curthread) 116 vfp_save_state(td, pcb); 117 } 118 KASSERT(pcb->pcb_vfpsaved == &pcb->pcb_vfpstate, 119 ("Called fill_fpregs while the kernel is using the VFP")); 120 memcpy(regs->fpr_r, pcb->pcb_vfpstate.reg, 121 sizeof(regs->fpr_r)); 122 regs->fpr_fpscr = pcb->pcb_vfpstate.fpscr; 123#else 124 memset(regs, 0, sizeof(*regs)); 125#endif 126 return (0); 127} 128 129int 130set_regs(struct thread *td, struct reg *regs) 131{ 132 struct trapframe *tf = td->td_frame; 133 134 bcopy(regs->r, &tf->tf_r0, sizeof(regs->r)); 135 tf->tf_usr_sp = regs->r_sp; 136 tf->tf_usr_lr = regs->r_lr; 137 tf->tf_pc = regs->r_pc; 138 tf->tf_spsr &= ~PSR_FLAGS; 139 tf->tf_spsr |= regs->r_cpsr & PSR_FLAGS; 140 return (0); 141} 142 143int 144set_fpregs(struct thread *td, struct fpreg *regs) 145{ 146#ifdef VFP 147 struct pcb *pcb; 148 149 pcb = td->td_pcb; 150 KASSERT(pcb->pcb_vfpsaved == &pcb->pcb_vfpstate, 151 ("Called set_fpregs while the kernel is using the VFP")); 152 memcpy(pcb->pcb_vfpstate.reg, regs->fpr_r, sizeof(regs->fpr_r)); 153 pcb->pcb_vfpstate.fpscr = regs->fpr_fpscr; 154#endif 155 return (0); 156} 157 158int 159fill_dbregs(struct thread *td, struct dbreg *regs) 160{ 161 162 bzero(regs, sizeof(*regs)); 163 return (0); 164} 165 166int 167set_dbregs(struct thread *td, struct dbreg *regs) 168{ 169 return (0); 170} 171