1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22/* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27#pragma ident "%Z%%M% %I% %E% SMI" 28 29/* 30 * Assembly language support for px driver 31 */ 32 33#include <sys/asm_linkage.h> 34#include <sys/machthread.h> 35#include <sys/privregs.h> 36 37/*LINTLIBRARY*/ 38 39#if defined(lint) 40 41/*ARGSUSED*/ 42int 43px_phys_peek_4u(size_t size, uint64_t paddr, uint64_t *value, int type) 44{ return (0); } 45 46/*ARGSUSED*/ 47int 48px_phys_poke_4u(size_t size, uint64_t paddr, uint64_t *value, int type) 49{ return (0); } 50 51#else /* lint */ 52 53! px_phys_peek_4u: Do physical address read. 54! 55! %o0 is size in bytes - Must be 8, 4, 2 or 1. Invalid sizes default to 1. 56! %o1 is address to read 57! %o2 is address to save value into 58! %o3 is 0 for little endian, non-zero for big endian 59! 60! To be called from an on_trap environment. 61! Interrupts will be disabled for the duration of the read, to prevent 62! an interrupt from raising the trap level to 1 and then a possible 63! data access exception being delivered while the trap level > 0. 64! 65! Always returns success (0) in %o0 66! 67! Assumes alignment is correct and that on_trap handling has been installed 68 69 ENTRY(px_phys_peek_4u) 70 71 rdpr %pstate, %o4 ! Disable interrupts if not already 72 andcc %o4, PSTATE_IE, %g2 ! Save original state first 73 bz .peek_ints_disabled 74 nop 75 wrpr %o4, PSTATE_IE, %pstate 76.peek_ints_disabled: 77 78 tst %o3 ! Set up %asi with modifier for 79 movz %xcc, ASI_IOL, %g1 ! Big/little endian physical space 80 movnz %xcc, ASI_IO, %g1 81 mov %g1, %asi 82 83 cmp %o0, 8 ! 64-bit? 84 bne .peek_int 85 cmp %o0, 4 ! 32-bit? 86 ldxa [%o1]%asi, %g1 87 ba .peekdone 88 stx %g1, [%o2] 89 90.peek_int: 91 bne .peek_half 92 cmp %o0, 2 ! 16-bit? 93 lduwa [%o1]%asi, %g1 94 ba .peekdone 95 stuw %g1, [%o2] 96 97.peek_half: 98 bne .peek_byte 99 nop 100 lduha [%o1]%asi, %g1 101 ba .peekdone 102 stuh %g1, [%o2] 103 104.peek_byte: 105 lduba [%o1]%asi, %g1 ! 8-bit! 106 stub %g1, [%o2] 107 108.peekdone: 109 membar #Sync ! Make sure the loads take 110 tst %g2 ! No need to reenable interrupts 111 bz .peek_ints_done ! if not enabled at entry 112 rdpr %pstate, %o4 113 wrpr %o4, PSTATE_IE, %pstate 114.peek_ints_done: 115 mov %g0, %o0 116 retl 117 nop 118 SET_SIZE(px_phys_peek_4u) 119 120 121! px_phys_poke_4u: Do physical address write. 122! 123! %o0 is size in bytes - Must be 8, 4, 2 or 1. Invalid sizes default to 1. 124! %o1 is address to write to 125! %o2 is address to read from 126! %o3 is 0 for little endian, non-zero for big endian 127! 128! Always returns success (0) in %o0 129! 130! Assumes alignment is correct and that on_trap handling has been installed 131 132 ENTRY(px_phys_poke_4u) 133 134 tst %o3 135 movz %xcc, ASI_IOL, %g1 ! Big/little endian physical space 136 movnz %xcc, ASI_IO, %g1 137 mov %g1, %asi 138 139 cmp %o0, 8 ! 64 bit? 140 bne .poke_int 141 cmp %o0, 4 ! 32-bit? 142 ldx [%o2], %g1 143 ba .pokedone 144 stxa %g1, [%o1]%asi 145 146.poke_int: 147 bne .poke_half 148 cmp %o0, 2 ! 16-bit? 149 lduw [%o2], %g1 150 ba .pokedone 151 stuwa %g1, [%o1]%asi 152 153.poke_half: 154 bne .poke_byte 155 nop 156 lduh [%o2], %g1 157 ba .pokedone 158 stuha %g1, [%o1]%asi 159 160.poke_byte: 161 ldub [%o2], %g1 ! 8-bit! 162 stuba %g1, [%o1]%asi 163 164.pokedone: 165 membar #Sync 166 retl 167 mov %g0, %o0 168 SET_SIZE(px_phys_poke_4u) 169 170#endif 171