2008-01-31 Bean <bean123ch@gmail.com>
* conf/i386-pc.rmk (pkglib_IMAGES): Add cdboot.img.
(cdboot_img_SOURCES): New variable.
(cdboot_img_ASFLAGS): New variable.
(cdboot_img_LDFLAGS): New variable.
* boot/i386/pc/cdboot.S: New file.
* disk/i386/pc/biosdisk.c (cd_start): New variable.
(cd_count): Likewise.
(grub_biosdisk_get_drive): Add support for cd device.
(grub_biosdisk_call_hook): Likewise.
(grub_biosdisk_iterate): Likewise.
(grub_biosdisk_open): Likewise.
(GRUB_BIOSDISK_CDROM_RETRY_COUNT): New macro.
(grub_biosdisk_rw): Support reading from cd device.
(GRUB_MOD_INIT): Iterate cd devices.
* include/grub/i386/pc/biosdisk.h (GRUB_BIOSDISK_FLAG_CDROM): New macro.
(GRUB_BIOSDISK_MACHINE_CDROM_START): Likewise.
(GRUB_BIOSDISK_MACHINE_CDROM_END): Likewise.
* kern/i386/pc/init.c (make_install_device): Check for cd device.
This commit is contained in:
bean
parent
4020aa53c0
commit
9be665dd11
7 changed files with 317 additions and 26 deletions
25
ChangeLog
25
ChangeLog
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@ -1,3 +1,28 @@
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2008-01-31 Bean <bean123ch@gmail.com>
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* conf/i386-pc.rmk (pkglib_IMAGES): Add cdboot.img.
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(cdboot_img_SOURCES): New variable.
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(cdboot_img_ASFLAGS): New variable.
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(cdboot_img_LDFLAGS): New variable.
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* boot/i386/pc/cdboot.S: New file.
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* disk/i386/pc/biosdisk.c (cd_start): New variable.
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(cd_count): Likewise.
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(grub_biosdisk_get_drive): Add support for cd device.
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(grub_biosdisk_call_hook): Likewise.
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(grub_biosdisk_iterate): Likewise.
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(grub_biosdisk_open): Likewise.
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(GRUB_BIOSDISK_CDROM_RETRY_COUNT): New macro.
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(grub_biosdisk_rw): Support reading from cd device.
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(GRUB_MOD_INIT): Iterate cd devices.
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* include/grub/i386/pc/biosdisk.h (GRUB_BIOSDISK_FLAG_CDROM): New macro.
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(GRUB_BIOSDISK_MACHINE_CDROM_START): Likewise.
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(GRUB_BIOSDISK_MACHINE_CDROM_END): Likewise.
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* kern/i386/pc/init.c (make_install_device): Check for cd device.
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2008-02-02 Robert Millan <rmh@aybabtu.com>
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* commands/read.c: New file.
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171
boot/i386/pc/cdboot.S
Normal file
171
boot/i386/pc/cdboot.S
Normal file
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@ -0,0 +1,171 @@
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/* -*-Asm-*- */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2008 Free Software Foundation, Inc.
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*
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* GRUB 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 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/boot.h>
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#include <grub/machine/boot.h>
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#include <grub/machine/kernel.h>
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#include <multiboot.h>
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.file "cdboot.S"
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#define CODE_ADDR 0x6000
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#define DATA_ADDR ((GRUB_BOOT_MACHINE_KERNEL_ADDR) + 0x200)
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#define CDSEC_SHIFT 11
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#define CDBLK_LENG 16
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.text
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.code16
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.globl start, _start
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start:
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call next
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next:
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jmp 1f
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. = start + 8
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bi_pvd:
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.long 0 /* LBA of primary volume descript. */
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bi_file:
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.long 0 /* LBA of boot file. */
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bi_length:
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.long 0 /* Length of boot file. */
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bi_csum:
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.long 0 /* Checksum of boot file */
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bi_reserved:
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.space (10*4) /* Reserved */
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1:
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popw %bx
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/* Boot from CDROM. */
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xorw %ax, %ax
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movw %ax, %ss
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movw $(CODE_ADDR), %sp
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movw %ax, %ds
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movw %ax, %es
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movw $(0x7C00 + err_noboot_msg - start), %si
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movl %cs: bi_length - next(%bx), %ecx
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orl %ecx, %ecx
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jz fail
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addl $((1 << CDSEC_SHIFT) - 1), %ecx
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shrl $CDSEC_SHIFT, %ecx
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movl %cs: bi_file - next(%bx), %esi
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call read_cdrom
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ljmp $(DATA_ADDR >> 4), $0
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/*
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* Parameters:
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* esi: start sector
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* ecx: number of sectors
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*/
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read_cdrom:
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xorl %eax, %eax
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/* Number of blocks to read. */
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pushw $CDBLK_LENG
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/* Block number. */
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pushl %eax
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pushl %esi
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/* Buffer address. */
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pushw $((DATA_ADDR - 0x400)>> 4)
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pushl %eax
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pushw $0x10
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xorl %edi, %edi
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movw %sp, %si
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1:
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movw 0x10(%si), %di
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cmpl %ecx, %edi
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jbe 2f
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movl %ecx, %edi
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2:
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mov %di, 2(%si)
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pushl %ecx
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movb $0x42, %ah
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int $0x13
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jnc 3f
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movb $0x42, %ah /* Try again. */
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int $0x13
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jnc 3f
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2:
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shrw $1, %di /* Reduce transfer size. */
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jz cdrom_fail
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movw %di, 0x10(%si)
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movw %di, 2(%si)
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movb $0x42, %ah
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int $0x13
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jc 2b
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3:
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movw %di, %ax
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shlw $(CDSEC_SHIFT - 4), %ax
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addw %ax, 6(%si)
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addl %edi, 8(%si)
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popl %ecx
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subl %edi, %ecx
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jnz 1b
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addw $0x12, %sp
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ret
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cdrom_fail:
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movw $(0x7C00 + err_cdfail_msg - start), %si
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fail:
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movb $0x0e, %ah
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xorw %bx, %bx
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1:
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lodsb (%si), %al
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int $0x10
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cmpb $0, %al
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jne 1b
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1: jmp 1b
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err_noboot_msg:
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.ascii "no boot info\0"
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err_cdfail_msg:
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.ascii "cdrom read fails\0"
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. = start + 0x1FF
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.byte 0
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@ -11,7 +11,8 @@ normal/execute.c_DEPENDENCIES = grub_script.tab.h
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normal/command.c_DEPENDENCIES = grub_script.tab.h
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# Images.
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pkglib_IMAGES = boot.img diskboot.img kernel.img pxeboot.img lnxboot.img
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pkglib_IMAGES = boot.img diskboot.img kernel.img pxeboot.img lnxboot.img \
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cdboot.img
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# For boot.img.
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boot_img_SOURCES = boot/i386/pc/boot.S
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@ -85,6 +86,24 @@ lnxboot_img-boot_i386_pc_lnxboot.o: boot/i386/pc/lnxboot.S $(boot/i386/pc/lnxboo
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lnxboot_img_ASFLAGS = $(COMMON_ASFLAGS)
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lnxboot_img_LDFLAGS = $(COMMON_LDFLAGS) -Wl,-N,-Ttext,6000
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# For cdboot.img.
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cdboot_img_SOURCES = boot/i386/pc/cdboot.S
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CLEANFILES += cdboot.img cdboot.exec cdboot_img-boot_i386_pc_cdboot.o
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MOSTLYCLEANFILES += cdboot_img-boot_i386_pc_cdboot.d
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cdboot.img: cdboot.exec
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$(OBJCOPY) -O binary -R .note -R .comment $< $@
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cdboot.exec: cdboot_img-boot_i386_pc_cdboot.o
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$(TARGET_CC) -o $@ $^ $(TARGET_LDFLAGS) $(cdboot_img_LDFLAGS)
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cdboot_img-boot_i386_pc_cdboot.o: boot/i386/pc/cdboot.S $(boot/i386/pc/cdboot.S_DEPENDENCIES)
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$(TARGET_CC) -Iboot/i386/pc -I$(srcdir)/boot/i386/pc $(TARGET_CPPFLAGS) -DASM_FILE=1 $(TARGET_ASFLAGS) $(cdboot_img_ASFLAGS) -MD -c -o $@ $<
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-include cdboot_img-boot_i386_pc_cdboot.d
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cdboot_img_ASFLAGS = $(COMMON_ASFLAGS)
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cdboot_img_LDFLAGS = $(COMMON_LDFLAGS) -Wl,-N,-Ttext,7C00
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# For kernel.img.
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kernel_img_SOURCES = kern/i386/pc/startup.S kern/main.c kern/device.c \
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kern/disk.c kern/dl.c kern/file.c kern/fs.c kern/err.c \
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@ -11,7 +11,8 @@ normal/execute.c_DEPENDENCIES = grub_script.tab.h
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normal/command.c_DEPENDENCIES = grub_script.tab.h
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# Images.
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pkglib_IMAGES = boot.img diskboot.img kernel.img pxeboot.img lnxboot.img
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pkglib_IMAGES = boot.img diskboot.img kernel.img pxeboot.img lnxboot.img \
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cdboot.img
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# For boot.img.
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boot_img_SOURCES = boot/i386/pc/boot.S
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@ -33,6 +34,11 @@ lnxboot_img_SOURCES = boot/i386/pc/lnxboot.S
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lnxboot_img_ASFLAGS = $(COMMON_ASFLAGS)
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lnxboot_img_LDFLAGS = $(COMMON_LDFLAGS) -Wl,-N,-Ttext,6000
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# For cdboot.img.
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cdboot_img_SOURCES = boot/i386/pc/cdboot.S
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cdboot_img_ASFLAGS = $(COMMON_ASFLAGS)
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cdboot_img_LDFLAGS = $(COMMON_LDFLAGS) -Wl,-N,-Ttext,7C00
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# For kernel.img.
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kernel_img_SOURCES = kern/i386/pc/startup.S kern/main.c kern/device.c \
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kern/disk.c kern/dl.c kern/file.c kern/fs.c kern/err.c \
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@ -26,12 +26,15 @@
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#include <grub/err.h>
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#include <grub/term.h>
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static int cd_start = GRUB_BIOSDISK_MACHINE_CDROM_START;
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static int cd_count = 0;
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static int
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grub_biosdisk_get_drive (const char *name)
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{
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unsigned long drive;
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if ((name[0] != 'f' && name[0] != 'h') || name[1] != 'd')
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if ((name[0] != 'f' && name[0] != 'h' && name[0] != 'c') || name[1] != 'd')
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goto fail;
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drive = grub_strtoul (name + 2, 0, 10);
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@ -40,6 +43,8 @@ grub_biosdisk_get_drive (const char *name)
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if (name[0] == 'h')
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drive += 0x80;
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else if (name[0] == 'c')
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drive += cd_start;
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return (int) drive ;
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@ -53,7 +58,10 @@ grub_biosdisk_call_hook (int (*hook) (const char *name), int drive)
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{
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char name[10];
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grub_sprintf (name, (drive & 0x80) ? "hd%d" : "fd%d", drive & (~0x80));
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if (drive >= cd_start)
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grub_sprintf (name, "cd%d", drive - cd_start);
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else
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grub_sprintf (name, (drive & 0x80) ? "hd%d" : "fd%d", drive & (~0x80));
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return hook (name);
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}
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@ -83,6 +91,10 @@ grub_biosdisk_iterate (int (*hook) (const char *name))
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return 1;
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}
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for (drive = cd_start; drive < cd_start + cd_count; drive++)
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if (grub_biosdisk_call_hook (hook, drive))
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return 1;
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return 0;
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}
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@ -97,7 +109,7 @@ grub_biosdisk_open (const char *name, grub_disk_t disk)
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if (drive < 0)
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return grub_errno;
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disk->has_partitions = (drive & 0x80);
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disk->has_partitions = ((drive & 0x80) && (drive < cd_start));
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disk->id = drive;
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data = (struct grub_biosdisk_data *) grub_malloc (sizeof (*data));
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@ -107,7 +119,13 @@ grub_biosdisk_open (const char *name, grub_disk_t disk)
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data->drive = drive;
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data->flags = 0;
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if (drive & 0x80)
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if (drive >= cd_start)
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{
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data->flags = GRUB_BIOSDISK_FLAG_LBA | GRUB_BIOSDISK_FLAG_CDROM;
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data->sectors = 32;
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total_sectors = 9000000; /* TODO: get the correct size. */
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}
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else if (drive & 0x80)
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{
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/* HDD */
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int version;
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@ -136,17 +154,20 @@ grub_biosdisk_open (const char *name, grub_disk_t disk)
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}
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}
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if (grub_biosdisk_get_diskinfo_standard (drive,
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&data->cylinders,
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&data->heads,
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&data->sectors) != 0)
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if (drive < cd_start)
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{
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grub_free (data);
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return grub_error (GRUB_ERR_BAD_DEVICE, "cannot get C/H/S values");
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}
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if (grub_biosdisk_get_diskinfo_standard (drive,
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&data->cylinders,
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&data->heads,
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&data->sectors) != 0)
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{
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grub_free (data);
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return grub_error (GRUB_ERR_BAD_DEVICE, "cannot get C/H/S values");
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}
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|
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if (! total_sectors)
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total_sectors = data->cylinders * data->heads * data->sectors;
|
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if (! total_sectors)
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total_sectors = data->cylinders * data->heads * data->sectors;
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}
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disk->total_sectors = total_sectors;
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disk->data = data;
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@ -164,6 +185,8 @@ grub_biosdisk_close (grub_disk_t disk)
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#define GRUB_BIOSDISK_READ 0
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#define GRUB_BIOSDISK_WRITE 1
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|
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#define GRUB_BIOSDISK_CDROM_RETRY_COUNT 3
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|
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static grub_err_t
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grub_biosdisk_rw (int cmd, grub_disk_t disk,
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grub_disk_addr_t sector, grub_size_t size,
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|
|
@ -184,13 +207,31 @@ grub_biosdisk_rw (int cmd, grub_disk_t disk,
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dap->buffer = segment << 16; /* The format SEGMENT:ADDRESS. */
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dap->block = sector;
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if (grub_biosdisk_rw_int13_extensions (cmd + 0x42, data->drive, dap))
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{
|
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/* Fall back to the CHS mode. */
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data->flags &= ~GRUB_BIOSDISK_FLAG_LBA;
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disk->total_sectors = data->cylinders * data->heads * data->sectors;
|
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return grub_biosdisk_rw (cmd, disk, sector, size, segment);
|
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if (data->flags & GRUB_BIOSDISK_FLAG_CDROM)
|
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{
|
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int i;
|
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|
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if (cmd)
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return grub_error (GRUB_ERR_WRITE_ERROR, "can\'t write to cdrom");
|
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|
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dap->blocks = (dap->blocks + 3) >> 2;
|
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dap->block >>= 2;
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|
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for (i = 0; i < GRUB_BIOSDISK_CDROM_RETRY_COUNT; i++)
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if (! grub_biosdisk_rw_int13_extensions (0x42, data->drive, dap))
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break;
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|
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if (i == GRUB_BIOSDISK_CDROM_RETRY_COUNT)
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return grub_error (GRUB_ERR_READ_ERROR, "cdrom read error");
|
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}
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else
|
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if (grub_biosdisk_rw_int13_extensions (cmd + 0x42, data->drive, dap))
|
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{
|
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/* Fall back to the CHS mode. */
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data->flags &= ~GRUB_BIOSDISK_FLAG_LBA;
|
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disk->total_sectors = data->cylinders * data->heads * data->sectors;
|
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return grub_biosdisk_rw (cmd, disk, sector, size, segment);
|
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}
|
||||
}
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else
|
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{
|
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|
|
@ -323,6 +364,8 @@ grub_disk_biosdisk_fini (void)
|
|||
|
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GRUB_MOD_INIT(biosdisk)
|
||||
{
|
||||
int drive, found = 0;
|
||||
|
||||
if (grub_disk_firmware_is_tainted)
|
||||
{
|
||||
grub_printf ("Firmware is marked as tainted, refusing to initialize.\n");
|
||||
|
|
@ -331,6 +374,24 @@ GRUB_MOD_INIT(biosdisk)
|
|||
grub_disk_firmware_fini = grub_disk_biosdisk_fini;
|
||||
|
||||
grub_disk_dev_register (&grub_biosdisk_dev);
|
||||
|
||||
for (drive = GRUB_BIOSDISK_MACHINE_CDROM_START;
|
||||
drive < GRUB_BIOSDISK_MACHINE_CDROM_END; drive++)
|
||||
{
|
||||
if (grub_biosdisk_check_int13_extensions (drive))
|
||||
{
|
||||
if (! found)
|
||||
cd_start = drive;
|
||||
found++;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (found)
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
cd_count = found;
|
||||
}
|
||||
|
||||
GRUB_MOD_FINI(biosdisk)
|
||||
|
|
|
|||
|
|
@ -23,6 +23,10 @@
|
|||
#include <grub/types.h>
|
||||
|
||||
#define GRUB_BIOSDISK_FLAG_LBA 1
|
||||
#define GRUB_BIOSDISK_FLAG_CDROM 2
|
||||
|
||||
#define GRUB_BIOSDISK_MACHINE_CDROM_START 0xe0
|
||||
#define GRUB_BIOSDISK_MACHINE_CDROM_END 0xf0
|
||||
|
||||
struct grub_biosdisk_data
|
||||
{
|
||||
|
|
|
|||
|
|
@ -22,6 +22,7 @@
|
|||
#include <grub/machine/memory.h>
|
||||
#include <grub/machine/console.h>
|
||||
#include <grub/machine/kernel.h>
|
||||
#include <grub/machine/biosdisk.h>
|
||||
#include <grub/types.h>
|
||||
#include <grub/err.h>
|
||||
#include <grub/dl.h>
|
||||
|
|
@ -71,9 +72,13 @@ make_install_device (void)
|
|||
}
|
||||
else if (grub_install_dos_part != -2)
|
||||
{
|
||||
grub_sprintf (dev, "(%cd%u",
|
||||
(grub_boot_drive & 0x80) ? 'h' : 'f',
|
||||
grub_boot_drive & 0x7f);
|
||||
if (grub_boot_drive >= GRUB_BIOSDISK_MACHINE_CDROM_START)
|
||||
grub_sprintf (dev, "(cd%u",
|
||||
grub_boot_drive - GRUB_BIOSDISK_MACHINE_CDROM_START);
|
||||
else
|
||||
grub_sprintf (dev, "(%cd%u",
|
||||
(grub_boot_drive & 0x80) ? 'h' : 'f',
|
||||
grub_boot_drive & 0x7f);
|
||||
|
||||
if (grub_install_dos_part >= 0)
|
||||
grub_sprintf (dev + grub_strlen (dev), ",%u", grub_install_dos_part + 1);
|
||||
|
|
|
|||
Loading…
Reference in a new issue