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/* $NetBSD: fusu.S,v 1.10 2003/12/01 13:34:44 rearnsha Exp $ */
/*-
* 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 <machine/asm.h>
#include <machine/asmacros.h>
#include <machine/armreg.h>
#include "assym.s"
__FBSDID("$FreeBSD: release/9.1.0/sys/arm/arm/fusu.S 163449 2006-10-17 02:24:47Z davidxu $");
#ifdef MULTIPROCESSOR
.Lcpu_info:
.word _C_LABEL(cpu_info)
#else
.Lcurpcb:
.word _C_LABEL(__pcpu) + PC_CURPCB
#endif
/*
* fuword(caddr_t uaddr);
* Fetch an int from the user's address space.
*/
ENTRY_NP(casuword32)
ENTRY(casuword)
#ifdef MULTIPROCESSOR
/* XXX Probably not appropriate for non-Hydra SMPs */
stmfd sp!, {r0, r14}
bl _C_LABEL(cpu_number)
ldr r2, .Lcpu_info
ldr r2, [r2, r0, lsl #2]
ldr r2, [r2, #CI_CURPCB]
ldmfd sp!, {r0, r14}
#else
ldr r3, .Lcurpcb
ldr r3, [r3]
#endif
#ifdef DIAGNOSTIC
teq r3, #0x00000000
beq .Lfusupcbfault
#endif
stmfd sp!, {r4, r5}
adr r4, .Lcasuwordfault
str r4, [r3, #PCB_ONFAULT]
ldrt r5, [r0]
cmp r5, r1
movne r0, r5
streqt r2, [r0]
moveq r0, r1
ldmfd sp!, {r4, r5}
mov r1, #0x00000000
str r1, [r3, #PCB_ONFAULT]
RET
/*
* Handle faults from casuword. Clean up and return -1.
*/
.Lcasuwordfault:
mov r0, #0x00000000
str r0, [r3, #PCB_ONFAULT]
mvn r0, #0x00000000
ldmfd sp!, {r4, r5}
RET
/*
* fuword(caddr_t uaddr);
* Fetch an int from the user's address space.
*/
ENTRY_NP(fuword32)
ENTRY(fuword)
#ifdef MULTIPROCESSOR
/* XXX Probably not appropriate for non-Hydra SMPs */
stmfd sp!, {r0, r14}
bl _C_LABEL(cpu_number)
ldr r2, .Lcpu_info
ldr r2, [r2, r0, lsl #2]
ldr r2, [r2, #CI_CURPCB]
ldmfd sp!, {r0, r14}
#else
ldr r2, .Lcurpcb
ldr r2, [r2]
#endif
#ifdef DIAGNOSTIC
teq r2, #0x00000000
beq .Lfusupcbfault
#endif
adr r1, .Lfusufault
str r1, [r2, #PCB_ONFAULT]
ldrt r3, [r0]
mov r1, #0x00000000
str r1, [r2, #PCB_ONFAULT]
mov r0, r3
RET
/*
* fusword(caddr_t uaddr);
* Fetch a short from the user's address space.
*/
ENTRY(fusword)
#ifdef MULTIPROCESSOR
/* XXX Probably not appropriate for non-Hydra SMPs */
stmfd sp!, {r0, r14}
bl _C_LABEL(cpu_number)
ldr r2, .Lcpu_info
ldr r2, [r2, r0, lsl #2]
ldr r2, [r2, #CI_CURPCB]
ldmfd sp!, {r0, r14}
#else
ldr r2, .Lcurpcb
ldr r2, [r2]
#endif
#ifdef DIAGNOSTIC
teq r2, #0x00000000
beq .Lfusupcbfault
#endif
adr r1, .Lfusufault
str r1, [r2, #PCB_ONFAULT]
ldrbt r3, [r0], #1
ldrbt ip, [r0]
#ifdef __ARMEB__
orr r0, ip, r3, asl #8
#else
orr r0, r3, ip, asl #8
#endif
mov r1, #0x00000000
str r1, [r2, #PCB_ONFAULT]
RET
/*
* fuswintr(caddr_t uaddr);
* Fetch a short from the user's address space. Can be called during an
* interrupt.
*/
ENTRY(fuswintr)
ldr r2, Lblock_userspace_access
ldr r2, [r2]
teq r2, #0
mvnne r0, #0x00000000
RETne
#ifdef MULTIPROCESSOR
/* XXX Probably not appropriate for non-Hydra SMPs */
stmfd sp!, {r0, r14}
bl _C_LABEL(cpu_number)
ldr r2, .Lcpu_info
ldr r2, [r2, r0, lsl #2]
ldr r2, [r2, #CI_CURPCB]
ldmfd sp!, {r0, r14}
#else
ldr r2, .Lcurpcb
ldr r2, [r2]
#endif
#ifdef DIAGNOSTIC
teq r2, #0x00000000
beq .Lfusupcbfault
#endif
adr r1, _C_LABEL(fusubailout)
str r1, [r2, #PCB_ONFAULT]
ldrbt r3, [r0], #1
ldrbt ip, [r0]
#ifdef __ARMEB__
orr r0, ip, r3, asl #8
#else
orr r0, r3, ip, asl #8
#endif
mov r1, #0x00000000
str r1, [r2, #PCB_ONFAULT]
RET
Lblock_userspace_access:
.word _C_LABEL(block_userspace_access)
.data
.align 0
.global _C_LABEL(block_userspace_access)
_C_LABEL(block_userspace_access):
.word 0
.text
/*
* fubyte(caddr_t uaddr);
* Fetch a byte from the user's address space.
*/
ENTRY(fubyte)
#ifdef MULTIPROCESSOR
/* XXX Probably not appropriate for non-Hydra SMPs */
stmfd sp!, {r0, r14}
bl _C_LABEL(cpu_number)
ldr r2, .Lcpu_info
ldr r2, [r2, r0, lsl #2]
ldr r2, [r2, #CI_CURPCB]
ldmfd sp!, {r0, r14}
#else
ldr r2, .Lcurpcb
ldr r2, [r2]
#endif
#ifdef DIAGNOSTIC
teq r2, #0x00000000
beq .Lfusupcbfault
#endif
adr r1, .Lfusufault
str r1, [r2, #PCB_ONFAULT]
ldrbt r3, [r0]
mov r1, #0x00000000
str r1, [r2, #PCB_ONFAULT]
mov r0, r3
RET
/*
* Handle faults from [fs]u*(). Clean up and return -1.
*/
.Lfusufault:
mov r0, #0x00000000
str r0, [r2, #PCB_ONFAULT]
mvn r0, #0x00000000
RET
/*
* Handle faults from [fs]u*(). Clean up and return -1. This differs from
* fusufault() in that trap() will recognise it and return immediately rather
* than trying to page fault.
*/
/* label must be global as fault.c references it */
.global _C_LABEL(fusubailout)
_C_LABEL(fusubailout):
mov r0, #0x00000000
str r0, [r2, #PCB_ONFAULT]
mvn r0, #0x00000000
RET
#ifdef DIAGNOSTIC
/*
* Handle earlier faults from [fs]u*(), due to no pcb
*/
.Lfusupcbfault:
mov r1, r0
adr r0, fusupcbfaulttext
b _C_LABEL(panic)
fusupcbfaulttext:
.asciz "Yikes - no valid PCB during fusuxxx() addr=%08x\n"
.align 0
#endif
/*
* suword(caddr_t uaddr, int x);
* Store an int in the user's address space.
*/
ENTRY_NP(suword32)
ENTRY(suword)
#ifdef MULTIPROCESSOR
/* XXX Probably not appropriate for non-Hydra SMPs */
stmfd sp!, {r0, r1, r14}
bl _C_LABEL(cpu_number)
ldr r2, .Lcpu_info
ldr r2, [r2, r0, lsl #2]
ldr r2, [r2, #CI_CURPCB]
ldmfd sp!, {r0, r1, r14}
#else
ldr r2, .Lcurpcb
ldr r2, [r2]
#endif
#ifdef DIAGNOSTIC
teq r2, #0x00000000
beq .Lfusupcbfault
#endif
adr r3, .Lfusufault
str r3, [r2, #PCB_ONFAULT]
strt r1, [r0]
mov r0, #0x00000000
str r0, [r2, #PCB_ONFAULT]
RET
/*
* suswintr(caddr_t uaddr, short x);
* Store a short in the user's address space. Can be called during an
* interrupt.
*/
ENTRY(suswintr)
ldr r2, Lblock_userspace_access
ldr r2, [r2]
teq r2, #0
mvnne r0, #0x00000000
RETne
#ifdef MULTIPROCESSOR
stmfd sp!, {r0, r1, r14}
bl _C_LABEL(cpu_number)
ldr r2, .Lcpu_info
ldr r2, [r2, r0, lsl #2]
ldr r2, [r2, #CI_CURPCB]
ldmfd sp!, {r0, r1, r14}
#else
ldr r2, .Lcurpcb
ldr r2, [r2]
#endif
#ifdef DIAGNOSTIC
teq r2, #0x00000000
beq .Lfusupcbfault
#endif
adr r3, _C_LABEL(fusubailout)
str r3, [r2, #PCB_ONFAULT]
#ifdef __ARMEB__
mov ip, r1, lsr #8
strbt ip, [r0], #1
#else
strbt r1, [r0], #1
mov r1, r1, lsr #8
#endif
strbt r1, [r0]
mov r0, #0x00000000
str r0, [r2, #PCB_ONFAULT]
RET
/*
* susword(caddr_t uaddr, short x);
* Store a short in the user's address space.
*/
ENTRY(susword)
#ifdef MULTIPROCESSOR
stmfd sp!, {r0, r1, r14}
bl _C_LABEL(cpu_number)
ldr r2, .Lcpu_info
ldr r2, [r2, r0, lsl #2]
ldr r2, [r2, #CI_CURPCB]
ldmfd sp!, {r0, r1, r14}
#else
ldr r2, .Lcurpcb
ldr r2, [r2]
#endif
#ifdef DIAGNOSTIC
teq r2, #0x00000000
beq .Lfusupcbfault
#endif
adr r3, .Lfusufault
str r3, [r2, #PCB_ONFAULT]
#ifdef __ARMEB__
mov ip, r1, lsr #8
strbt ip, [r0], #1
#else
strbt r1, [r0], #1
mov r1, r1, lsr #8
#endif
strbt r1, [r0]
mov r0, #0x00000000
str r0, [r2, #PCB_ONFAULT]
RET
/*
* subyte(caddr_t uaddr, char x);
* Store a byte in the user's address space.
*/
ENTRY(subyte)
#ifdef MULTIPROCESSOR
stmfd sp!, {r0, r1, r14}
bl _C_LABEL(cpu_number)
ldr r2, .Lcpu_info
ldr r2, [r2, r0, lsl #2]
ldr r2, [r2, #CI_CURPCB]
ldmfd sp!, {r0, r1, r14}
#else
ldr r2, .Lcurpcb
ldr r2, [r2]
#endif
#ifdef DIAGNOSTIC
teq r2, #0x00000000
beq .Lfusupcbfault
#endif
adr r3, .Lfusufault
str r3, [r2, #PCB_ONFAULT]
strbt r1, [r0]
mov r0, #0x00000000
str r0, [r2, #PCB_ONFAULT]
RET