*
* @APPLE_LICENSE_HEADER_START@
*
- * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
- * Reserved. This file contains Original Code and/or Modifications of
- * Original Code as defined in and that are subject to the Apple Public
- * Source License Version 1.1 (the "License"). You may not use this file
- * except in compliance with the License. Please obtain a copy of the
- * License at http://www.apple.com/publicsource and read it before using
- * this file.
+ * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
*
* The Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
* Harness for calling real-mode BIOS functions.
*/
-#include "legacy/asm.h"
-
-#define data32 .byte 0x66
-#define addr32 .byte 0x67
-
-#define O_INT 0
-#define O_EAX 4
-#define O_EBX 8
-#define O_ECX 12
-#define O_EDX 16
-#define O_EDI 20
-#define O_ESI 24
-#define O_EBP 28
-#define O_CS 32
-#define O_DS 34
-#define O_ES 36
-#define O_FLG 38
+#include <architecture/i386/asm_help.h>
+#include "memory.h"
+
+#define data32 .byte 0x66
+#define addr32 .byte 0x67
+
+#define O_INT 0
+#define O_EAX 4
+#define O_EBX 8
+#define O_ECX 12
+#define O_EDX 16
+#define O_EDI 20
+#define O_ESI 24
+#define O_EBP 28
+#define O_CS 32
+#define O_DS 34
+#define O_ES 36
+#define O_FLG 38
.data
- .lcomm save_eax, 4,2
- .lcomm save_edx, 4,2
- .lcomm save_es, 2,1
- .lcomm save_flag, 2,1
- .lcomm new_eax, 4,2
- .lcomm new_edx, 4,2
- .lcomm new_es, 2,1
+ .lcomm save_eax, 4,2
+ .lcomm save_edx, 4,2
+ .lcomm save_es, 2,1
+ .lcomm save_flag, 2,1
+ .lcomm new_eax, 4,2
+ .lcomm new_edx, 4,2
+ .lcomm new_es, 2,1
.text
* Call real-mode BIOS INT functions.
*
*/
-ENTRY(bios)
- enter $0,$0
- pushal
-
- movl 8(%ebp), %edx // address of save area
- movb O_INT(%edx), %al // save int number
- movb %al, do_int+1
-
- movl O_EBX(%edx), %ebx
- movl O_ECX(%edx), %ecx
- movl O_EDI(%edx), %edi
- movl O_ESI(%edx), %esi
- movl O_EBP(%edx), %ebp
- movl %edx, save_edx
- movl O_EAX(%edx), %eax
- movl %eax, new_eax
- movl O_EDX(%edx), %eax
- movl %eax, new_edx
- movw O_ES(%edx), %ax
- movl %ax, new_es
-
- call EXT(_prot_to_real)
-
- data32
- addr32
- mov new_eax, %eax
- data32
- addr32
- mov new_edx, %edx
- data32
- addr32
- mov new_es, %es
+LABEL(_bios)
+ enter $0, $0
+ pushal
+
+ movl 8(%ebp), %edx // address of save area
+ movb O_INT(%edx), %al // save int number
+ movb %al, do_int+1
+
+ movl O_EBX(%edx), %ebx
+ movl O_ECX(%edx), %ecx
+ movl O_EDI(%edx), %edi
+ movl O_ESI(%edx), %esi
+ movl O_EBP(%edx), %ebp
+ movl %edx, save_edx
+ movl O_EAX(%edx), %eax
+ movl %eax, new_eax
+ movl O_EDX(%edx), %eax
+ movl %eax, new_edx
+ movw O_ES(%edx), %ax
+ movl %ax, new_es
+
+ call __prot_to_real
+
+ data32
+ addr32
+ mov OFFSET16(new_eax), %eax
+ data32
+ addr32
+ mov OFFSET16(new_edx), %edx
+ data32
+ addr32
+ mov OFFSET16(new_es), %es
do_int:
- int $0x00
- pushf
- data32
- addr32
- movl %eax, save_eax
- popl %eax // actually pop %ax
- addr32
- movl %eax, save_flag // actually movw
- mov %es, %ax
- addr32
- movl %eax, save_es // actually movw
- data32
- call EXT(_real_to_prot)
-
- movl %edx, new_edx // save new edx before clobbering
- movl save_edx, %edx
- movl new_edx, %eax // now move it into buffer
- movl %eax, O_EDX(%edx)
- movl save_eax, %eax
- movl %eax, O_EAX(%edx)
- movw save_es, %ax
- movw %ax, O_ES(%edx)
- movw save_flag, %ax
- movw %ax, O_FLG(%edx)
- movl %ebx, O_EBX(%edx)
- movl %ecx, O_ECX(%edx)
- movl %edi, O_EDI(%edx)
- movl %esi, O_ESI(%edx)
- movl %ebp, O_EBP(%edx)
-
- popal
- leave
-
- ret
-
-/*============================================================================
- * Determines the total system memory size using various BIOS Int 15 calls.
- *
- */
-ENTRY(get_memsize)
- enter $0, $0 # create frame pointer (32 bit operand/stack)
- pushal # save all registers
-
- movl 8(%ebp), %ebx # push input structure pointer to stack
- pushl %ebx
-
- call EXT(_prot_to_real) # switch to real mode
-
- ##################################################################
- # In real mode.
- # Do not forget the opcode overrides, since the assembler
- # does not know we have made a transition to 16-bit operation.
- ##################################################################
-
- data32
- movl $0xE801, %eax # Get memory size
- clc
- int $0x15
- data32
- jnc getmsz_e801
-
- data32
- movl $0xDA88, %eax # Get memory size
- clc
- int $0x15
- data32
- jnc getmsz_da88
-
- movb $0x8A, %ah # Get memory size
- clc
- int $0x15
- data32
- jnc getmsz_8a
-
- movb $0x88, %ah # Get memory size
- clc
- int $0x15
- data32
- jnc getmsz_88
-
- xorl %edx, %edx # Error, cannot get memory size
- xorl %eax, %eax
-
-getmsz_done:
- data32
- addr32
- pushl %eax # Push EAX to 32-bit stack
-
- data32
- call EXT(_real_to_prot) # Back to protected mode. EAX is modified.
-
- ##################################################################
- # Back to protected mode.
- ##################################################################
-
- popl %eax # Pop EAX from stack
- popl %ebx # Pop pointer to register structure
-
- # Copy the result to the input structure pointed to by a pointer
- # which is on top of the stack. Write register EAX and EDX to the
- # structure.
-
- movl %eax, O_EAX(%ebx)
- movl %edx, O_EDX(%ebx)
-
- popal # restore all registers
- leave # undo enter operator
- ret
-
-getmsz_88:
- orl %eax, %eax
- data32
- jz getmsz_64m
- xorl %edx, %edx
-
-getmsz_8a:
- data32
- movl $1024, %ebx # Add in 1M
- addl %ebx, %eax
- adcl $0, %edx
- data32
- jmp getmsz_done
-
-getmsz_64m:
- data32
- movl $1, %edx
- xorl %eax, %eax
- data32
- jmp getmsz_done
-
-getmsz_da88:
- xor %dh, %dh
- movb %cl, %dl
- movl %ebx, %eax
- data32
- jmp getmsz_8a
-
-getmsz_e801:
- xorl %edx, %edx
- orl %ebx, %ebx
- data32
- jz getmsz_88
-
- data32
- movl $64, %eax
- mul %ebx
-
- data32
- movl $16384, %ebx
- addl %ebx, %eax
- adcl $0, %edx
-
- data32
- jmp getmsz_done
+ int $0x00
+ pushf
+ data32
+ addr32
+ movl %eax, OFFSET16(save_eax)
+ popl %eax // actually pop %ax
+ addr32
+ movl %eax, OFFSET16(save_flag) // actually movw
+ mov %es, %ax
+ addr32
+ movl %eax, OFFSET16(save_es) // actually movw
+ data32
+ call __real_to_prot
+
+ movl %edx, new_edx // save new edx before clobbering
+ movl save_edx, %edx
+ movl new_edx, %eax // now move it into buffer
+ movl %eax, O_EDX(%edx)
+ movl save_eax, %eax
+ movl %eax, O_EAX(%edx)
+ movw save_es, %ax
+ movw %ax, O_ES(%edx)
+ movw save_flag, %ax
+ movw %ax, O_FLG(%edx)
+ movl %ebx, O_EBX(%edx)
+ movl %ecx, O_ECX(%edx)
+ movl %edi, O_EDI(%edx)
+ movl %esi, O_ESI(%edx)
+ movl %ebp, O_EBP(%edx)
+
+ popal
+ leave
+
+ ret
projects / apple / boot.git / blobdiff