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Obsolete for some time

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This commit is contained in:
Michael Brown 2007-01-14 02:24:41 +00:00
parent 6dcb182aee
commit 644f3674e6
1 changed files with 0 additions and 130 deletions
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130
src/arch/i386/core/realmode_asm.S
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@ -1,130 +0,0 @@
/* Real-mode interface: assembly-language portions.
*
* Initial version by Michael Brown <mbrown@fensystems.co.uk>, January 2004.
*/
#include "realmode.h"
#if 1 /* CODE16 */
#define BOCHSBP xchgw %bx,%bx
#define NUM_PUSHA_REGS (8)
#define NUM_SEG_REGS (6)
.text
.arch i386
.section ".text16.nocompress", "ax", @progbits
.code16
.equ CR0_PE,1
#ifdef GAS291
#define DATA32 data32;
#define ADDR32 addr32;
#define LJMPI(x) ljmp x
#else
#define DATA32 data32
#define ADDR32 addr32
/* newer GAS295 require #define LJMPI(x) ljmp *x */
#define LJMPI(x) ljmp x
#endif
#ifdef PXE_EXPORT
/****************************************************************************
* PXE CALLBACK INTERFACE
*
* Prepend this to rm_callback_interface to create a real-mode PXE
* callback interface.
****************************************************************************
*/
.section ".text16", "ax", @progbits
.globl pxe_callback_interface
.code16
pxe_callback_interface:
/* Macro to calculate offset of labels within code segment in
* installed copy of code.
*/
#define INSTALLED(x) ( (x) - pxe_callback_interface )
/****************************************************************************
* PXE entry points (!PXE and PXENV+ APIs)
****************************************************************************
*/
/* in_call mechanism for !PXE API calls */
.globl _pxe_in_call_far
_pxe_in_call_far:
/* Prepend "PXE API call" and "API version 0x201" to stack */
pushl $0x201
jmp 1f
/* in_call mechanism for PXENV+ API calls */
.globl _pxenv_in_call_far
_pxenv_in_call_far:
/* Prepend "PXE API call" and "API version 0x200" to stack */
pushl $0x200
1: pushl $EB_OPCODE_PXE
/* Perform real-mode in_call */
call pxe_rm_in_call
/* Return */
addw $8, %sp
lret
/****************************************************************************
* PXE installation check (INT 1A) code
****************************************************************************
*/
.globl _pxe_intercept_int1a
_pxe_intercept_int1a:
pushfw
cmpw $0x5650, %ax
jne 2f
1: /* INT 1A,5650 - Intercept */
popfw
/* Set up return values according to PXE spec: */
movw $0x564e, %ax /* AX := 564Eh (VN) */
pushw %cs:INSTALLED(_pxe_pxenv_segment)
popw %es /* ES:BX := &(PXENV+ structure) */
movw %cs:INSTALLED(_pxe_pxenv_offset), %bx
clc /* CF is cleared */
lret $2 /* 'iret' without reloading flags */
2: /* INT 1A,other - Do not intercept */
popfw
ljmp %cs:*INSTALLED(_pxe_intercepted_int1a)
.globl _pxe_intercepted_int1a
_pxe_intercepted_int1a: .word 0,0
.globl _pxe_pxenv_location
_pxe_pxenv_location:
_pxe_pxenv_offset: .word 0
_pxe_pxenv_segment: .word 0
pxe_rm_in_call:
pxe_attach_rm:
/* rm_callback_interface must be appended here */
pxe_callback_interface_end:
.globl _pxe_callback_interface_size
.equ _pxe_callback_interface_size, pxe_callback_interface_end - pxe_callback_interface
.globl pxe_callback_interface_size
pxe_callback_interface_size:
.word _pxe_callback_interface_size
#else /* PXE_EXPORT */
/* Define symbols used by the linker scripts, to prevent link errors */
.globl _pxe_callback_interface_size
.equ _pxe_callback_interface_size, 0
#endif /* PXE_EXPORT */
#else /* CODE16 */
/* Define symbols used by the linker scripts, to prevent link errors */
.globl _rm_callback_interface_size
.equ _rm_callback_interface_size, 0
.globl _pxe_callback_interface_size
.equ _pxe_callback_interface_size, 0
#endif /* CODE16 */