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[bios] Add bin-x86_64-pcbios build platform
Move most arch/i386 files to arch/x86, and adjust the contents of the Makefiles and the include/bits/*.h headers to reflect the new locations. This patch makes no substantive code changes, as can be seen using a rename-aware diff (e.g. "git show -M5"). This patch does not make the pcbios platform functional for x86_64; it merely allows it to compile without errors. Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
284
src/arch/x86/interface/pcbios/int13con.c
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284
src/arch/x86/interface/pcbios/int13con.c
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/*
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* Copyright (C) 2015 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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* You can also choose to distribute this program under the terms of
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* the Unmodified Binary Distribution Licence (as given in the file
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* COPYING.UBDL), provided that you have satisfied its requirements.
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#include <ipxe/console.h>
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#include <ipxe/init.h>
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#include <realmode.h>
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#include <int13.h>
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#include <config/console.h>
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/** @file
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*
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* INT13 disk log console
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*
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*/
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/* Set default console usage if applicable */
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#if ! ( defined ( CONSOLE_INT13 ) && CONSOLE_EXPLICIT ( CONSOLE_INT13 ) )
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#undef CONSOLE_INT13
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#define CONSOLE_INT13 ( CONSOLE_USAGE_ALL & ~CONSOLE_USAGE_LOG )
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#endif
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/** Disk drive number */
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#define INT13CON_DRIVE 0x80
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/** Log partition type */
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#define INT13CON_PARTITION_TYPE 0xe0
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/** Maximum number of outstanding unwritten characters */
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#define INT13CON_MAX_UNWRITTEN 64
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/** Log partition header */
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struct int13con_header {
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/** Magic signature */
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char magic[10];
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} __attribute__ (( packed ));
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/** Log partition magic signature */
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#define INT13CON_MAGIC "iPXE LOG\n\n"
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/** Sector buffer */
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static uint8_t __bss16_array ( int13con_buffer, [INT13_BLKSIZE] );
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#define int13con_buffer __use_data16 ( int13con_buffer )
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/** Disk address packet */
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static struct int13_disk_address __bss16 ( int13con_address );
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#define int13con_address __use_data16 ( int13con_address )
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/** Current LBA */
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static uint64_t int13con_lba;
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/** Maximum LBA */
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static uint64_t int13con_max_lba;
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/** Current offset within sector */
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static size_t int13con_offset;
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/** Number of unwritten characters */
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static size_t int13con_unwritten;
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struct console_driver int13con __console_driver;
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/**
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* Read/write disk sector
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*
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* @v op Operation
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* @v lba Logical block address
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* @ret rc Return status code
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*/
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static int int13con_rw ( unsigned int op, uint64_t lba ) {
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uint8_t error;
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/* Construct disk address packet */
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int13con_address.bufsize = sizeof ( int13con_address );
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int13con_address.count = 1;
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int13con_address.buffer.segment = rm_ds;
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int13con_address.buffer.offset = __from_data16 ( int13con_buffer );
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int13con_address.lba = lba;
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/* Issue INT13 */
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__asm__ ( REAL_CODE ( "int $0x13\n\t" )
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: "=a" ( error )
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: "0" ( op << 8 ), "d" ( INT13CON_DRIVE ),
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"S" ( __from_data16 ( &int13con_address ) ) );
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if ( error ) {
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DBG ( "INT13CON operation %04x failed: %02x\n",
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op, error );
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return -EIO;
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}
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return 0;
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}
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/**
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* Write character to console
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*
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* @v character Character
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*/
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static void int13con_putchar ( int character ) {
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static int busy;
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int rc;
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/* Ignore if we are already mid-logging */
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if ( busy )
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return;
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busy = 1;
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/* Write character to buffer */
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int13con_buffer[int13con_offset++] = character;
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int13con_unwritten++;
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/* Write sector to disk, if applicable */
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if ( ( int13con_offset == INT13_BLKSIZE ) ||
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( int13con_unwritten == INT13CON_MAX_UNWRITTEN ) ||
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( character == '\n' ) ) {
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/* Write sector to disk */
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if ( ( rc = int13con_rw ( INT13_EXTENDED_WRITE,
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int13con_lba ) ) != 0 ) {
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DBG ( "INT13CON could not write log\n" );
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/* Ignore and continue; there's nothing we can do */
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}
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/* Reset count of unwritten characters */
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int13con_unwritten = 0;
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}
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/* Move to next sector, if applicable */
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if ( int13con_offset == INT13_BLKSIZE ) {
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/* Disable console if we have run out of space */
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if ( int13con_lba >= int13con_max_lba )
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int13con.disabled = 1;
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/* Clear log buffer */
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memset ( int13con_buffer, 0, sizeof ( int13con_buffer ) );
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int13con_offset = 0;
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/* Move to next sector */
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int13con_lba++;
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}
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/* Clear busy flag */
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busy = 0;
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}
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/**
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* Find log partition
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*
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* @ret rc Return status code
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*/
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static int int13con_find ( void ) {
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struct master_boot_record *mbr =
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( ( struct master_boot_record * ) int13con_buffer );
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struct int13con_header *hdr =
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( ( struct int13con_header * ) int13con_buffer );
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struct partition_table_entry part[4];
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unsigned int i;
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int rc;
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/* Read MBR */
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if ( ( rc = int13con_rw ( INT13_EXTENDED_READ, 0 ) ) != 0 ) {
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DBG ( "INT13CON could not read MBR: %s\n", strerror ( rc ) );
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return rc;
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}
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/* Check MBR magic */
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if ( mbr->magic != INT13_MBR_MAGIC ) {
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DBG ( "INT13CON incorrect MBR magic\n" );
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DBG2_HDA ( 0, mbr, sizeof ( *mbr ) );
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return -EINVAL;
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}
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/* Look for magic partition */
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memcpy ( part, mbr->partitions, sizeof ( part ) );
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for ( i = 0 ; i < ( sizeof ( part ) / sizeof ( part[0] ) ) ; i++ ) {
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/* Skip partitions of the wrong type */
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if ( part[i].type != INT13CON_PARTITION_TYPE )
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continue;
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/* Read partition header */
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if ( ( rc = int13con_rw ( INT13_EXTENDED_READ,
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part[i].start ) ) != 0 ) {
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DBG ( "INT13CON partition %d could not read header: "
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"%s\n", ( i + 1 ), strerror ( rc ) );
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continue;
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}
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/* Check partition header */
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if ( memcmp ( hdr->magic, INT13CON_MAGIC,
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sizeof ( hdr->magic ) ) != 0 ) {
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DBG ( "INT13CON partition %d bad magic\n", ( i + 1 ) );
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DBG2_HDA ( 0, hdr, sizeof ( *hdr ) );
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continue;
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}
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/* Found log partition */
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DBG ( "INT13CON partition %d at [%08x,%08x)\n", ( i + 1 ),
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part[i].start, ( part[i].start + part[i].length ) );
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int13con_lba = part[i].start;
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int13con_max_lba = ( part[i].start + part[i].length - 1 );
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/* Initialise log buffer */
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memset ( &int13con_buffer[ sizeof ( *hdr ) ], 0,
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( sizeof ( int13con_buffer ) - sizeof ( *hdr ) ) );
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int13con_offset = sizeof ( hdr->magic );
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return 0;
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}
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DBG ( "INT13CON found no log partition\n" );
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return -ENOENT;
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}
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/**
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* Initialise INT13 console
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*
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*/
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static void int13con_init ( void ) {
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uint8_t error;
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uint16_t check;
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unsigned int discard_c;
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unsigned int discard_d;
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int rc;
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/* Check for INT13 extensions */
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__asm__ __volatile__ ( REAL_CODE ( "int $0x13\n\t"
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"setc %%al\n\t" )
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: "=a" ( error ), "=b" ( check ),
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"=c" ( discard_c ), "=d" ( discard_d )
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: "0" ( INT13_EXTENSION_CHECK << 8 ),
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"1" ( 0x55aa ), "3" ( INT13CON_DRIVE ) );
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if ( error || ( check != 0xaa55 ) ) {
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DBG ( "INT13CON missing extensions (%02x,%04x)\n",
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error, check );
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return;
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}
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/* Locate log partition */
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if ( ( rc = int13con_find() ) != 0)
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return;
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/* Enable console */
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int13con.disabled = 0;
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}
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/**
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* INT13 console initialisation function
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*/
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struct init_fn int13con_init_fn __init_fn ( INIT_CONSOLE ) = {
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.initialise = int13con_init,
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};
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/** INT13 console driver */
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struct console_driver int13con __console_driver = {
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.putchar = int13con_putchar,
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.disabled = CONSOLE_DISABLED,
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.usage = CONSOLE_INT13,
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};
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