| 1 | /* $Id: inlines.h 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * Inline routines for Watcom C.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2010-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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| 26 | */
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| 27 |
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| 28 | #ifndef VBOX_INCLUDED_SRC_PC_BIOS_inlines_h
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| 29 | #define VBOX_INCLUDED_SRC_PC_BIOS_inlines_h
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| 30 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 31 | # pragma once
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| 32 | #endif
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| 33 |
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| 34 | extern unsigned inp(unsigned port);
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| 35 | extern unsigned outp(unsigned port, unsigned value);
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| 36 | extern unsigned inpw(unsigned port);
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| 37 | extern unsigned outpw(unsigned port, unsigned value);
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| 38 | #pragma intrinsic(inp,outp,inpw,outpw)
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| 39 | #define inb(p) inp(p)
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| 40 | #define outb(p, v) outp(p, v)
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| 41 | #define inw(p) inpw(p)
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| 42 | #define outw(p, v) outpw(p, v)
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| 43 |
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| 44 | /* Far byte/word/dword access routines. */
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| 45 |
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| 46 | inline uint8_t read_byte(uint16_t seg, uint16_t offset)
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| 47 | {
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| 48 | return( *(seg:>(uint8_t *)offset) );
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| 49 | }
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| 50 |
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| 51 | inline void write_byte(uint16_t seg, uint16_t offset, uint8_t data)
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| 52 | {
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| 53 | *(seg:>(uint8_t *)offset) = data;
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| 54 | }
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| 55 |
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| 56 | inline uint16_t read_word(uint16_t seg, uint16_t offset)
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| 57 | {
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| 58 | return( *(seg:>(uint16_t *)offset) );
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| 59 | }
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| 60 |
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| 61 | inline void write_word(uint16_t seg, uint16_t offset, uint16_t data)
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| 62 | {
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| 63 | *(seg:>(uint16_t *)offset) = data;
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| 64 | }
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| 65 |
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| 66 | inline uint32_t read_dword(uint16_t seg, uint16_t offset)
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| 67 | {
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| 68 | return( *(seg:>(uint32_t *)offset) );
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| 69 | }
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| 70 |
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| 71 | inline void write_dword(uint16_t seg, uint16_t offset, uint32_t data)
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| 72 | {
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| 73 | *(seg:>(uint32_t *)offset) = data;
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| 74 | }
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| 75 |
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| 76 |
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| 77 | void int_enable(void);
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| 78 | #pragma aux int_enable = "sti" modify exact [] nomemory;
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| 79 |
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| 80 | void int_disable(void);
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| 81 | #pragma aux int_disable = "cli" modify exact [] nomemory;
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| 82 |
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| 83 | void int_enable_hlt_disable(void);
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| 84 | #pragma aux int_enable_hlt_disable = \
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| 85 | "sti" \
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| 86 | "hlt" \
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| 87 | "cli" \
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| 88 | modify exact [] nomemory;
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| 89 |
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| 90 | uint16_t int_query(void);
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| 91 | #pragma aux int_query = \
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| 92 | "pushf" \
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| 93 | "pop ax" \
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| 94 | value [ax] modify exact [ax] nomemory;
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| 95 |
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| 96 | void int_restore(uint16_t old_flags);
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| 97 | #pragma aux int_restore = \
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| 98 | "push ax" \
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| 99 | "popf" \
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| 100 | parm [ax] modify exact [] nomemory;
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| 101 |
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| 102 | void halt(void);
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| 103 | #pragma aux halt = "hlt" modify exact [] nomemory;
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| 104 |
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| 105 | void halt_forever(void);
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| 106 | #pragma aux halt_forever = \
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| 107 | "forever:" \
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| 108 | "hlt" \
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| 109 | "jmp forever" \
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| 110 | modify exact [] nomemory aborts;
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| 111 |
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| 112 | /* Output a null-terminated string to a specified port, without the
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| 113 | * terminating null character.
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| 114 | */
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| 115 | static void out_ctrl_str_asm(uint16_t port, const char *s);
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| 116 | #pragma aux out_ctrl_str_asm = \
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| 117 | "mov al, [bx]" \
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| 118 | "next:" \
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| 119 | "out dx, al" \
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| 120 | "inc bx" \
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| 121 | "mov al, [bx]" \
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| 122 | "or al, al" \
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| 123 | "jnz next" \
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| 124 | parm [dx] [bx] modify exact [ax bx] nomemory;
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| 125 |
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| 126 | #ifdef __386__
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| 127 |
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| 128 | void rep_movsb(void __far *d, void __far *s, int nbytes);
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| 129 | #pragma aux rep_movsb = \
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| 130 | "push ds" \
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| 131 | "mov ds, dx" \
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| 132 | "rep movsb" \
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| 133 | "pop ds" \
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| 134 | parm [es edi] [dx esi] [ecx];
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| 135 |
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| 136 | #else
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| 137 |
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| 138 | void rep_movsb(void __far *d, void __far *s, int nbytes);
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| 139 | #pragma aux rep_movsb = \
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| 140 | "push ds" \
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| 141 | "mov ds, dx" \
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| 142 | "rep movsb" \
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| 143 | "pop ds" \
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| 144 | parm [es di] [dx si] [cx];
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| 145 |
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| 146 | #endif
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| 147 |
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| 148 | void rep_movsw(void __far *d, void __far *s, int nwords);
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| 149 | #pragma aux rep_movsw = \
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| 150 | "push ds" \
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| 151 | "mov ds, dx" \
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| 152 | "rep movsw" \
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| 153 | "pop ds" \
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| 154 | parm [es di] [dx si] [cx];
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| 155 |
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| 156 | #ifndef __386__
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| 157 |
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| 158 | char __far *rep_insb(char __far *buffer, unsigned nbytes, unsigned port);
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| 159 | #pragma aux rep_insb = ".286" "rep insb" parm [es di] [cx] [dx] value [es di] modify exact [cx di];
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| 160 |
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| 161 | char __far *rep_insw(char __far *buffer, unsigned nwords, unsigned port);
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| 162 | #pragma aux rep_insw = ".286" "rep insw" parm [es di] [cx] [dx] value [es di] modify exact [cx di];
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| 163 |
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| 164 | # if VBOX_BIOS_CPU >= 80386
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| 165 | char __far *rep_insd(char __far *buffer, unsigned ndwords, unsigned port);
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| 166 | # pragma aux rep_insd = ".386" "rep insd" parm [es di] [cx] [dx] value [es di] modify exact [cx di];
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| 167 | # endif
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| 168 |
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| 169 | char __far *rep_outsb(char __far *buffer, unsigned nbytes, unsigned port);
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| 170 | #pragma aux rep_outsb = ".286" "rep outs dx,byte ptr es:[si]" parm [es si] [cx] [dx] value [es si] modify exact [cx si];
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| 171 |
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| 172 | char __far *rep_outsw(char __far *buffer, unsigned nwords, unsigned port);
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| 173 | #pragma aux rep_outsw = ".286" "rep outs dx,word ptr es:[si]" parm [es si] [cx] [dx] value [es si] modify exact [cx si];
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| 174 |
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| 175 | # if VBOX_BIOS_CPU >= 80386
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| 176 | char __far *rep_outsd(char __far *buffer, unsigned ndwords, unsigned port);
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| 177 | # pragma aux rep_outsd = ".386" "rep outs dx,dword ptr es:[si]" parm [es si] [cx] [dx] value [es si] modify exact [cx si];
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| 178 | # endif
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| 179 |
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| 180 | uint16_t swap_16(uint16_t val);
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| 181 | #pragma aux swap_16 = "xchg ah,al" parm [ax] value [ax] modify exact [ax] nomemory;
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| 182 |
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| 183 | uint32_t swap_32(uint32_t val);
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| 184 | #pragma aux swap_32 = \
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| 185 | "xchg ah, al" \
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| 186 | "xchg dh, dl" \
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| 187 | "xchg ax, dx" \
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| 188 | parm [dx ax] value [dx ax] modify exact [dx ax] nomemory;
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| 189 |
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| 190 | uint64_t swap_64(uint64_t val);
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| 191 | #pragma aux swap_64 = \
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| 192 | "xchg ah, al" \
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| 193 | "xchg bh, bl" \
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| 194 | "xchg ch, cl" \
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| 195 | "xchg dh, dl" \
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| 196 | "xchg ax, dx" \
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| 197 | "xchg bx, cx" \
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| 198 | parm [ax bx cx dx] value [ax bx cx dx] modify exact [ax bx cx dx] nomemory;
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| 199 |
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| 200 | #endif
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| 201 |
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| 202 | #if VBOX_BIOS_CPU >= 80386
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| 203 |
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| 204 | /* Warning: msr_read/msr_write destroy high bits of 32-bit registers (EAX, ECX, EDX). */
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| 205 |
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| 206 | uint64_t msr_read(uint32_t msr);
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| 207 | #pragma aux msr_read = \
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| 208 | ".586" \
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| 209 | "shl ecx, 16" \
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| 210 | "mov cx, ax" \
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| 211 | "rdmsr" \
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| 212 | "xchg eax, edx" \
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| 213 | "mov bx, ax" \
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| 214 | "shr eax, 16" \
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| 215 | "mov cx, dx" \
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| 216 | "shr edx, 16" \
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| 217 | "xchg dx, cx" \
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| 218 | parm [cx ax] value [ax bx cx dx] modify [] nomemory;
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| 219 |
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| 220 | void msr_write(uint64_t val, uint32_t msr);
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| 221 | #pragma aux msr_write = \
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| 222 | ".586" \
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| 223 | "shl eax, 16" \
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| 224 | "mov ax, bx" \
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| 225 | "xchg dx, cx" \
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| 226 | "shl edx, 16" \
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| 227 | "mov dx, cx" \
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| 228 | "xchg eax, edx" \
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| 229 | "mov cx, di" \
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| 230 | "shl ecx, 16" \
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| 231 | "mov cx, si" \
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| 232 | "wrmsr" \
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| 233 | parm [ax bx cx dx] [di si] modify [] nomemory;
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| 234 |
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| 235 | /* Warning: eflags_read/eflags_write destroy high bits of 32-bit registers (EDX). */
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| 236 | uint32_t eflags_read( void );
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| 237 | #pragma aux eflags_read = \
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| 238 | ".386" \
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| 239 | "pushfd" \
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| 240 | "pop edx" \
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| 241 | "mov ax, dx" \
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| 242 | "shr edx, 16" \
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| 243 | value [dx ax] modify [dx ax];
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| 244 |
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| 245 | uint32_t eflags_write( uint32_t e_flags );
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| 246 | #pragma aux eflags_write = \
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| 247 | ".386" \
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| 248 | "shl edx, 16" \
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| 249 | "mov dx, ax" \
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| 250 | "push edx" \
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| 251 | "popfd" \
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| 252 | parm [dx ax] modify [dx ax];
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| 253 |
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| 254 | /* Warning cpuid destroys high bits of 32-bit registers (EAX, EBX, ECX, EDX). */
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| 255 | void cpuid( uint32_t __far cpu_id[4], uint32_t leaf );
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| 256 | #pragma aux cpuid = \
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| 257 | ".586" \
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| 258 | "shl edx, 16" \
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| 259 | "mov dx, ax" \
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| 260 | "mov eax, edx" \
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| 261 | "cpuid" \
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| 262 | "mov es:[di+0], eax" \
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| 263 | "mov es:[di+4], ebx" \
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| 264 | "mov es:[di+8], ecx" \
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| 265 | "mov es:[di+12], edx" \
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| 266 | parm [es di] [dx ax] modify [bx cx dx]
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| 267 |
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| 268 | #endif
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| 269 |
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| 270 | #endif /* !VBOX_INCLUDED_SRC_PC_BIOS_inlines_h */
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| 271 |
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