/* $NetBSD: fusu.S,v 1.9 2026/04/03 18:30:01 skrll Exp $ */ /*- * Copyright (c) 2019 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1996-1998 Mark Brinicombe. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Mark Brinicombe * 4. The name of the company nor the name of the author may be used to * endorse or promote products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include "opt_multiprocessor.h" #include "opt_cpuoptions.h" #include "assym.h" #include <machine/asm.h> #include <arm/locore.h> #if (ARM_ARCH_2 + ARM_ARCH_3 + ARM_ARCH_4 + ARM_ARCH_5 + ARM_ARCH_6) > 0 #define NO_LDRHT_STRHT #endif #define RETURN_SUCCESS \ mov r0, #0x00000000 ; \ mov pc, lr #define RETURN_ERROR_ALREADY_IN_R0 \ mov pc, lr #define UFETCHSTORE_PROLOGUE \ GET_CURPCB(r2) ; \ adr r3, _C_LABEL(ufetchstore_fault) ; \ str r3, [r2, #PCB_ONFAULT] #define UFETCHSTORE_EPILOGUE \ mov r3, #0x00000000 ; \ str r3, [r2, #PCB_ONFAULT] /* LINTSTUB: int _ufetch_8(const uint8_t *uaddr, uint8_t *valp); */ ENTRY(_ufetch_8) UFETCHSTORE_PROLOGUE ldrbt r3, [r0] strb r3, [r1] UFETCHSTORE_EPILOGUE RETURN_SUCCESS END(_ufetch_8) #ifdef NO_LDRHT_STRHT /* LINTSTUB: int _ufetch_16_no_ldrht(const uint16_t *uaddr, uint16_t *valp); */ ENTRY(_ufetch_16_no_ldrht) UFETCHSTORE_PROLOGUE ldrbt r3, [r0], #1 strb r3, [r1], #1 ldrbt r3, [r0] strb r3, [r1] UFETCHSTORE_EPILOGUE RETURN_SUCCESS END(_ufetch_16_no_ldrht) /* LINTSTUB: int _ufetch_16(const uint16_t *uaddr, uint16_t *valp); */ STRONG_ALIAS(_ufetch_16,_ufetch_16_no_ldrht) #else /* XXX */ /* LINTSTUB: int _ufetch_16_ldrht(const uint16_t *uaddr, uint16_t *valp); */ ENTRY(_ufetch_16_ldrht) UFETCHSTORE_PROLOGUE ldrht r3, [r0], #0 strh r3, [r1] UFETCHSTORE_EPILOGUE RETURN_SUCCESS END(_ufetch_16_ldrht) /* LINTSTUB: int _ufetch_16(const uint16_t *uaddr, uint16_t *valp); */ STRONG_ALIAS(_ufetch_16,_ufetch_16_ldrht) #endif /* NO_LDRHT_STRHT */ /* LINTSTUB: int _ufetch_32(const uint32_t *uaddr, uint32_t *valp); */ ENTRY(_ufetch_32) UFETCHSTORE_PROLOGUE ldrt r3, [r0] str r3, [r1] UFETCHSTORE_EPILOGUE RETURN_SUCCESS END(_ufetch_32) /* LINTSTUB: int _ustore_8(uint8_t *uaddr, uint8_t val); */ ENTRY(_ustore_8) UFETCHSTORE_PROLOGUE strbt r1, [r0] UFETCHSTORE_EPILOGUE RETURN_SUCCESS END(_ustore_8) #ifdef NO_LDRHT_STRHT /* LINTSTUB: int _ustore_16_no_strht(uint16_t *uaddr, uint16_t val); */ ENTRY(_ustore_16_no_strht) UFETCHSTORE_PROLOGUE #ifdef __ARMEB__ mov r3, r1, lsr #8 strbt r3, [r0], #1 #else strbt r1, [r0], #1 mov r1, r1, lsr #8 #endif strbt r1, [r0] UFETCHSTORE_EPILOGUE RETURN_SUCCESS END(_ustore_16_no_strht) /* LINTSTUB: int _ustore_16(uint16_t *uaddr, uint16_t val); */ STRONG_ALIAS(_ustore_16,_ustore_16_no_strht) #else /* XXX */ /* LINTSTUB: int _ustore_16_strht(uint16_t *uaddr, uint16_t val); */ ENTRY(_ustore_16_strht) UFETCHSTORE_PROLOGUE strht r1, [r0], #0 UFETCHSTORE_EPILOGUE RETURN_SUCCESS END(_ustore_16_strht) /* LINTSTUB: int _ustore_16(uint16_t *uaddr, uint16_t val); */ STRONG_ALIAS(_ustore_16,_ustore_16_strht) #endif /* NO_LDRHT_STRHT */ /* LINTSTUB: int _ustore_32(uint32_t *uaddr, uint32_t val); */ ENTRY(_ustore_32) UFETCHSTORE_PROLOGUE strt r1, [r0] UFETCHSTORE_EPILOGUE RETURN_SUCCESS END(_ustore_32) ENTRY_NP(ufetchstore_fault) UFETCHSTORE_EPILOGUE RETURN_ERROR_ALREADY_IN_R0 END(ufetchstore_fault) #if \ defined(CPU_SA110) || defined(CPU_SA1100) || \ defined(CPU_SA1110) || defined(CPU_IXP12X0) || \ defined(CPU_XSCALE) /* XXXJRT Can we G/C this? */ .data .align 0 .global _C_LABEL(block_userspace_access) _C_LABEL(block_userspace_access): .word 0 #endif
