gpxe: delete long since obsolete snapshot of gPXE

gPXE has been deprecated in favor of iPXE for many, many years now.
It is much better than users get it directly from the iPXE project,
since we should no longer need any special modifications for Syslinux
use.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 0 insertions, 256 deletions

diff --git a/gpxe/src/arch/i386/transitions/libkir.S b/gpxe/src/arch/i386/transitions/libkir.S
deleted file mode 100644
index 1176fcce..00000000
--- a/gpxe/src/arch/i386/transitions/libkir.S
+++ /dev/null
@@ -1,256 +0,0 @@
-/*
- * libkir: a transition library for -DKEEP_IT_REAL
- *
- * Michael Brown <mbrown@fensystems.co.uk>
- *
- */
-
-FILE_LICENCE ( GPL2_OR_LATER )
-
-/****************************************************************************
- * This file defines libkir: an interface between external and
- * internal environments when -DKEEP_IT_REAL is used, so that both
- * internal and external environments are in real mode.  It deals with
- * switching data segments and the stack.  It provides the following
- * functions:
- *
- * ext_to_kir &		switch between external and internal (kir)
- * kir_to_ext		environments, preserving all non-segment
- *			registers
- *
- * kir_call		issue a call to an internal routine from external
- *			code
- *
- * libkir is written to avoid assuming that segments are anything
- * other than opaque data types, and also avoids assuming that the
- * stack pointer is 16-bit.  This should enable it to run just as well
- * in 16:16 or 16:32 protected mode as in real mode.
- ****************************************************************************
- */
-
-/* Breakpoint for when debugging under bochs */
-#define BOCHSBP xchgw %bx, %bx
-
-	.text
-	.arch i386
-	.section ".text16", "awx", @progbits
-	.code16
-	
-/****************************************************************************
- * init_libkir (real-mode or 16:xx protected-mode far call)
- *
- * Initialise libkir ready for transitions to the kir environment
- *
- * Parameters:
- *   %cs : .text16 segment
- *   %ds : .data16 segment
- ****************************************************************************
- */
-	.globl	init_libkir
-init_libkir:
-	/* Record segment registers */
-	pushw	%ds
-	popw	%cs:kir_ds
-	lret
-	
-/****************************************************************************
- * ext_to_kir (real-mode or 16:xx protected-mode near call)
- *
- * Switch from external stack and segment registers to internal stack
- * and segment registers.  %ss:sp is restored from the saved kir_ds
- * and kir_sp.  %ds, %es, %fs and %gs are all restored from the saved
- * kir_ds.  All other registers are preserved.
- *
- * %cs:0000 must point to the start of the runtime image code segment
- * on entry.
- *
- * Parameters: none
- ****************************************************************************
- */
-
-	.globl	ext_to_kir
-ext_to_kir:
-	/* Record external segment registers */
-	movw	%ds, %cs:ext_ds
-	pushw	%cs
-	popw	%ds	/* Set %ds = %cs for easier access to variables */
-	movw	%es, %ds:ext_es
-	movw	%fs, %ds:ext_fs
-	movw	%gs, %ds:ext_fs
-
-	/* Preserve registers */
-	movw	%ax, %ds:save_ax
-
-	/* Extract near return address from stack */
-	popw	%ds:save_retaddr
-
-	/* Record external %ss:esp */
-	movw	%ss, %ds:ext_ss
-	movl	%esp, %ds:ext_esp
-
-	/* Load internal segment registers and stack pointer */
-	movw	%ds:kir_ds, %ax
-	movw	%ax, %ss
-	movzwl	%ds:kir_sp, %esp
-	movw	%ax, %ds
-	movw	%ax, %es
-	movw	%ax, %fs
-	movw	%ax, %gs
-1:
-
-	/* Place return address on new stack */
-	pushw	%cs:save_retaddr
-	
-	/* Restore registers and return */
-	movw	%cs:save_ax, %ax
-	ret
-
-/****************************************************************************
- * kir_to_ext (real-mode or 16:xx protected-mode near call)
- *
- * Switch from internal stack and segment registers to external stack
- * and segment registers.  %ss:%esp is restored from the saved ext_ss
- * and ext_esp.  Other segment registers are restored from the
- * corresponding locations.  All other registers are preserved.
- *
- * Note that it is actually %ss that is recorded as kir_ds, on the
- * assumption that %ss == %ds when kir_to_ext is called.
- *
- * Parameters: none
- ****************************************************************************
- */
-
-	.globl	kir_to_ext
-kir_to_ext:
-	/* Record near return address */
-	pushw	%cs
-	popw	%ds	/* Set %ds = %cs for easier access to variables */
-	popw	%ds:save_retaddr
-	
-	/* Record internal segment registers and %sp */
-	movw	%ss, %ds:kir_ds
-	movw	%sp, %ds:kir_sp
-
-	/* Load external segment registers and stack pointer */
-	movw	%ds:ext_ss, %ss
-	movl	%ds:ext_esp, %esp
-	movw	%ds:ext_gs, %gs
-	movw	%ds:ext_fs, %fs
-	movw	%ds:ext_es, %es
-	movw	%ds:ext_ds, %ds
-
-	/* Return */
-	pushw	%cs:save_retaddr
-	ret
-	
-/****************************************************************************
- * kir_call (real-mode or 16:xx protected-mode far call)
- *
- * Call a specific C function in the internal code.  The prototype of
- * the C function must be
- *   void function ( struct i386_all_resg *ix86 ); 
- * ix86 will point to a struct containing the real-mode registers
- * at entry to kir_call.
- *
- * All registers will be preserved across kir_call(), unless the C
- * function explicitly overwrites values in ix86.  Interrupt status
- * will also be preserved.
- *
- * Parameters:
- *   function : (32-bit) virtual address of C function to call
- *
- * Example usage:
- *	pushl	$pxe_api_call
- *	lcall	$UNDI_CS, $kir_call
- *	addw	$4, %sp
- * to call in to the C function
- *      void pxe_api_call ( struct i386_all_regs *ix86 );
- ****************************************************************************
- */
-
-	.globl	kir_call
-kir_call:
-	/* Preserve flags.  Must do this before any operation that may
-	 * affect flags.
-	 */
-	pushfl
-	popl	%cs:save_flags
-
-	/* Disable interrupts.  We do funny things with the stack, and
-	 * we're not re-entrant.
-	 */
-	cli
-		
-	/* Extract address of internal routine from stack.  We must do
-	 * this without using (%bp), because we may be called with
-	 * either a 16-bit or a 32-bit stack segment.
-	 */
-	popl	%cs:save_retaddr	/* Scratch location */
-	popl	%cs:save_function
-	subl	$8, %esp		/* Restore %esp */
-	
-	/* Switch to internal stack.  Note that the external stack is
-	 * inaccessible once we're running internally (since we have
-	 * no concept of 48-bit far pointers)
-	 */
-	call	ext_to_kir
-	
-	/* Store external registers on internal stack */
-	pushl	%cs:save_flags
-	pushal
-	pushl	%cs:ext_fs_and_gs
-	pushl	%cs:ext_ds_and_es
-	pushl	%cs:ext_cs_and_ss
-
-	/* Push &ix86 on stack and call function */
-	sti
-	pushl	%esp
-	data32 call *%cs:save_function
-	popl	%eax /* discard */
-	
-	/* Restore external registers from internal stack */
-	popl	%cs:ext_cs_and_ss
-	popl	%cs:ext_ds_and_es
-	popl	%cs:ext_fs_and_gs
-	popal
-	popl	%cs:save_flags
-
-	/* Switch to external stack */
-	call	kir_to_ext
-
-	/* Restore flags */
-	pushl	%cs:save_flags
-	popfl
-
-	/* Return */
-	lret
-
-/****************************************************************************
- * Stored internal and external stack and segment registers
- ****************************************************************************
- */
-	
-ext_cs_and_ss:	
-ext_cs:		.word 0
-ext_ss:		.word 0
-ext_ds_and_es:	
-ext_ds:		.word 0
-ext_es:		.word 0
-ext_fs_and_gs:	
-ext_fs:		.word 0
-ext_gs:		.word 0
-ext_esp:	.long 0
-
-		.globl kir_ds
-kir_ds:		.word 0
-		.globl kir_sp
-kir_sp:		.word _estack
-
-/****************************************************************************
- * Temporary variables
- ****************************************************************************
- */
-save_ax:	.word 0
-save_retaddr:	.long 0
-save_flags:	.long 0
-save_function:	.long 0