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* Removed F8 and F12 keys again, see comments to bug #5163.

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* Some cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36233 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2010-04-13 18:25:56 +00:00
parent fc813f1a1a
commit a1b2e9e959
3 changed files with 65 additions and 64 deletions
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src/system/boot/platform/bios_ia32/bios.S
+42 -44
View File
@@ -1,17 +1,18 @@
/*
** Copyright 2004, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
** Distributed under the terms of the Haiku License.
* Copyright 2004-2010, Axel Dörfler, axeld@pinc-software.de.
* Distributed under the terms of the MIT License.
*/
/*! This file contains code to call BIOS functions out of a protected
mode environment. It doesn't use the virtual86 mode - it switches
to real mode, make the BIOS call, and switch back to protected
mode again. It's meant to be used in a single-threaded boot loader,
not in a multi-tasking operating system.
It relies on the real mode segment descriptors found in shell.S.
*/
/** This file contains code to call BIOS functions out of a protected
* mode environment. It doesn't use the virtual86 mode - it switches
* to real mode, make the BIOS call, and switch back to protected
* mode again. It's meant to be used in a single-threaded boot loader,
* not in a multi-tasking operating system.
* It relies on the real mode segment descriptors found in shell.S.
*/
#define FUNCTION(x) .globl x ; x ## :
#define REAL_MODE_STACK 0x9000
@@ -31,12 +32,12 @@
.text
.code32
/** This function brings you back to protected mode after you've
* switched to it using switch_to_real_mode().
* Should restore the whole environment to what it looked like
* before. Clobbers %eax.
*/
/*! This function brings you back to protected mode after you've
switched to it using switch_to_real_mode().
Should restore the whole environment to what it looked like
before. Clobbers %eax.
*/
FUNCTION(switch_to_protected_mode)
cli // turn off interrupts
@@ -85,13 +86,13 @@ _no_paging:
//--------------------------------------------------------------
/** Switches from protected mode back to real mode.
* It will disable paging and set the real mode segment selectors to 0x1000,
* except for the stack selector, which will be 0x0 (the stack is at 0x9000
* which is where the BFS boot loader puts it as well).
* Clobbers %eax.
*/
/*! Switches from protected mode back to real mode.
It will disable paging and set the real mode segment selectors to 0x1000,
except for the stack selector, which will be 0x0 (the stack is at 0x9000
which is where the BFS boot loader puts it as well).
Clobbers %eax.
*/
FUNCTION(switch_to_real_mode)
// save the %esp register
movl %esp, %eax
@@ -156,11 +157,11 @@ _real_code_segment:
//--------------------------------------------------------------
/** void call_bios(uint8 num, struct bios_regs *regs)
* Does a BIOS call by triggering a software interrupt in real
* mode.
*/
/*! void call_bios(uint8 num, struct bios_regs *regs)
Does a BIOS call by triggering a software interrupt in real
mode.
*/
FUNCTION(call_bios)
pushal
pushfl
@@ -235,12 +236,12 @@ int_number:
//--------------------------------------------------------------
/** uint32 search_keyboard_buffer()
* Search in keyboard buffer keycodes for F8, F12 or Space
* if not found - search ESC keycode at the end of this buffer (2 positions)
*/
FUNCTION(search_keyboard_buffer)
/*! uint32 boot_key_in_keyboard_buffer()
Search keyboard buffer for the keycodes for space in the first run, and,
if not found - for the escape key at the last two positions of this buffer
*/
FUNCTION(boot_key_in_keyboard_buffer)
pushal
pushfl
@@ -253,27 +254,23 @@ FUNCTION(search_keyboard_buffer)
cld
push %ds
xorl %eax, %eax
mov %ax, %ds
mov $0x41E, %si // BIOS kbd buffer
mov %ax, %ds
mov $0x41E, %si // BIOS kbd buffer
search_cycle1:
lodsw
cmp $0x4200, %ax // test F8 key
jz to_ret
cmp $0x8600, %ax // test F12 key
jz to_ret
cmp $0x3920, %ax // test Space key
jz to_ret
cmp $0x440, %si
jnz search_cycle1
cmp $0x3920, %ax // test space key
jz to_ret
cmp $0x440, %si
jnz search_cycle1
addw 0x41C, %si
movw -0x42(%si), %ax
cmp $0x011B, %ax // test ESC key
jz to_ret
cmp $0x011B, %ax // test ESC key
jz to_ret
movw -0x44(%si), %ax
cmp $0x011B, %ax // test ESC key
cmp $0x011B, %ax // test ESC key
to_ret:
pop %ds
pop %ds
// save %eax
movl %eax, (SAVED_EAX - 0x10000)
@@ -291,6 +288,7 @@ to_ret:
//--------------------------------------------------------------
.globl idt_descriptor
idt_descriptor:
.short 0x7ff // IDT at 0x0, default real mode location
src/system/boot/platform/bios_ia32/bios.h
+14 -10
View File
@@ -1,7 +1,7 @@
/*
** Copyright 2004, Axel Dörfler, [email protected]. All rights reserved.
** Distributed under the terms of the OpenBeOS License.
*/
* Copyright 2004-2010, Axel Dörfler, [email protected].
* Distributed under the terms of the MIT License.
*/
#ifndef BIOS_H
#define BIOS_H
@@ -28,23 +28,27 @@ struct bios_regs {
#define ADDRESS_SEGMENT(address) ((addr_t)(address) >> 4)
#define ADDRESS_OFFSET(address) ((addr_t)(address) & 0xf)
#define LINEAR_ADDRESS(segment, offset) (((addr_t)(segment) << 4) + (addr_t)(offset))
#define LINEAR_ADDRESS(segment, offset) \
(((addr_t)(segment) << 4) + (addr_t)(offset))
#define SEGMENTED_TO_LINEAR(segmented) \
LINEAR_ADDRESS((addr_t)(segmented) >> 16, (addr_t)(segmented) & 0xffff)
static const addr_t kDataSegmentScratch = 0x10020; // about 768 bytes
static const addr_t kDataSegmentBase = 0x10000;
static const addr_t kExtraSegmentScratch = 0x2000; // about 24 kB
extern
#ifdef __cplusplus
"C"
extern "C" {
#endif
void call_bios(uint8 num, struct bios_regs *regs);
extern
void call_bios(uint8 num, struct bios_regs* regs);
uint32 boot_key_in_keyboard_buffer(void);
#ifdef __cplusplus
"C"
}
#endif
uint32 search_keyboard_buffer();
#endif /* BIOS_H */
src/system/boot/platform/bios_ia32/keyboard.cpp
+9 -10
View File
@@ -1,7 +1,7 @@
/*
** Copyright 2004, Axel Dörfler, [email protected]. All rights reserved.
** Distributed under the terms of the OpenBeOS License.
*/
* Copyright 2004-2010, Axel Dörfler, [email protected].
* Distributed under the terms of the MIT License.
*/
#include "keyboard.h"
@@ -10,10 +10,9 @@
#include <boot/platform.h>
/** Note, checking for keys doesn't seem to work in graphics
* mode, at least in Bochs.
*/
/*! Note, checking for keys doesn't seem to work in graphics
mode, at least in Bochs.
*/
static uint16
check_for_key(void)
{
@@ -68,9 +67,9 @@ check_for_boot_keys(void)
// LShift or RShift - option menu
options |= BOOT_OPTION_MENU;
} else {
keycode = search_keyboard_buffer();
if (keycode == 0x4200 || keycode == 0x8600 || keycode == 0x3920) {
// F8 or F12 or Space - option menu
keycode = boot_key_in_keyboard_buffer();
if (keycode == 0x3920) {
// space - option menu
options |= BOOT_OPTION_MENU;
} else if (keycode == 0x011B) {
// ESC - debug output