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  • Committer: Al Stone
  • Date: 2012-02-09 01:17:20 UTC
  • Revision ID: albert.stone@canonical.com-20120209011720-tztl7ik3qayz80p4
first commit to bzr for qemu

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pc-bios/optionrom/optionrom.h
 
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/*
 
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 * Common Option ROM Functions
 
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 *
 
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 * This program is free software; you can redistribute it and/or modify
 
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 * it under the terms of the GNU General Public License as published by
 
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 * the Free Software Foundation; either version 2 of the License, or
 
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 * (at your option) any later version.
 
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 *
 
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 * This program is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 
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 * GNU General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU General Public License
 
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 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 
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 *
 
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 * Copyright Novell Inc, 2009
 
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 *   Authors: Alexander Graf <agraf@suse.de>
 
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 */
 
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#define NO_QEMU_PROTOS
 
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#include "../../hw/fw_cfg.h"
 
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#define BIOS_CFG_IOPORT_CFG     0x510
 
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#define BIOS_CFG_IOPORT_DATA    0x511
 
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/* Break the translation block flow so -d cpu shows us values */
 
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#define DEBUG_HERE \
 
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        jmp             1f;                             \
 
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        1:
 
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/*
 
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 * Read a variable from the fw_cfg device.
 
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 * Clobbers:    %edx
 
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 * Out:         %eax
 
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 */
 
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.macro read_fw VAR
 
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        mov             $\VAR, %ax
 
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        mov             $BIOS_CFG_IOPORT_CFG, %dx
 
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        outw            %ax, (%dx)
 
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        mov             $BIOS_CFG_IOPORT_DATA, %dx
 
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        inb             (%dx), %al
 
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        shl             $8, %eax
 
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        inb             (%dx), %al
 
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        shl             $8, %eax
 
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        inb             (%dx), %al
 
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        shl             $8, %eax
 
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        inb             (%dx), %al
 
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        bswap           %eax
 
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.endm
 
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#define read_fw_blob_pre(var)                           \
 
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        read_fw         var ## _ADDR;                   \
 
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        mov             %eax, %edi;                     \
 
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        read_fw         var ## _SIZE;                   \
 
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        mov             %eax, %ecx;                     \
 
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        mov             $var ## _DATA, %ax;             \
 
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        mov             $BIOS_CFG_IOPORT_CFG, %edx;     \
 
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        outw            %ax, (%dx);                     \
 
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        mov             $BIOS_CFG_IOPORT_DATA, %dx;     \
 
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        cld
 
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/*
 
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 * Read a blob from the fw_cfg device.
 
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 * Requires _ADDR, _SIZE and _DATA values for the parameter.
 
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 *
 
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 * Clobbers:    %eax, %edx, %es, %ecx, %edi
 
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 */
 
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#define read_fw_blob(var)                               \
 
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        read_fw_blob_pre(var);                          \
 
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        /* old as(1) doesn't like this insn so emit the bytes instead: \
 
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        rep insb        (%dx), %es:(%edi);              \
 
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        */                                              \
 
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        .dc.b           0xf3,0x6c
 
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/*
 
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 * Read a blob from the fw_cfg device in forced addr32 mode.
 
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 * Requires _ADDR, _SIZE and _DATA values for the parameter.
 
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 *
 
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 * Clobbers:    %eax, %edx, %es, %ecx, %edi
 
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 */
 
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#define read_fw_blob_addr32(var)                                \
 
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        read_fw_blob_pre(var);                          \
 
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        /* old as(1) doesn't like this insn so emit the bytes instead: \
 
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        addr32 rep insb (%dx), %es:(%edi);              \
 
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        */                                              \
 
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        .dc.b           0x67,0xf3,0x6c
 
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#define OPTION_ROM_START                                        \
 
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    .code16;                                            \
 
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    .text;                                              \
 
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        .global         _start;                         \
 
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    _start:;                                            \
 
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        .short          0xaa55;                         \
 
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        .byte           (_end - _start) / 512;
 
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#define BOOT_ROM_START                                  \
 
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        OPTION_ROM_START                                \
 
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        lret;                                           \
 
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        .org            0x18;                           \
 
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        .short          0;                              \
 
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        .short          _pnph;                          \
 
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    _pnph:                                              \
 
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        .ascii          "$PnP";                         \
 
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        .byte           0x01;                           \
 
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        .byte           ( _pnph_len / 16 );             \
 
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        .short          0x0000;                         \
 
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        .byte           0x00;                           \
 
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        .byte           0x00;                           \
 
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        .long           0x00000000;                     \
 
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        .short          _manufacturer;                  \
 
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        .short          _product;                       \
 
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        .long           0x00000000;                     \
 
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        .short          0x0000;                         \
 
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        .short          0x0000;                         \
 
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        .short          _bev;                           \
 
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        .short          0x0000;                         \
 
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        .short          0x0000;                         \
 
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        .equ            _pnph_len, . - _pnph;           \
 
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    _bev:;                                              \
 
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        /* DS = CS */                                   \
 
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        movw            %cs, %ax;                       \
 
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        movw            %ax, %ds;
 
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#define OPTION_ROM_END                                  \
 
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    .align 512, 0;                                      \
 
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    _end:
 
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#define BOOT_ROM_END                                    \
 
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    _manufacturer:;                                     \
 
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        .asciz "QEMU";                                  \
 
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    _product:;                                          \
 
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        .asciz BOOT_ROM_PRODUCT;                        \
 
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        OPTION_ROM_END
 
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