Old callbacks mechanism is obsolete.

src/arch/i386/core/callbacks.c

@@ -1,106 +0,0 @@
-/* Callout/callback interface for Etherboot
- *
- * This file provides the mechanisms for making calls from Etherboot
- * to external programs and vice-versa.
- *
- * Initial version by Michael Brown <mbrown@fensystems.co.uk>, January 2004.
- */
-
-#include "etherboot.h"
-#include "callbacks.h"
-#include "realmode.h"
-#include <stdarg.h>
-
-/* Maximum amount of stack data that prefix may request to be passed
- * to its exit routine
- */
-#define MAX_PREFIX_STACK_DATA 16
-
-/* Prefix exit routine is defined in prefix object */
-extern void prefix_exit ( void );
-extern void prefix_exit_end ( void );
-
-/*****************************************************************************
- *
- * IN_CALL INTERFACE
- *
- *****************************************************************************
- */
-
-/* in_call(): entry point for calls in to Etherboot from external code. 
- *
- * Parameters: some set up by assembly code _in_call(), others as
- * passed from external code.
- */
-uint32_t i386_in_call ( va_list ap, i386_pm_in_call_data_t pm_data,
-			uint32_t opcode ) {
-	uint32_t ret;
-	i386_rm_in_call_data_t rm_data;
-	in_call_data_t in_call_data = { &pm_data, NULL };
-	struct {
-		int data[MAX_PREFIX_STACK_DATA/4];
-	} in_stack;
-
-	/* Fill out rm_data if we were called from real mode */
-	if ( opcode & EB_CALL_FROM_REAL_MODE ) {
-		in_call_data.rm = &rm_data;
-		rm_data = va_arg ( ap, typeof(rm_data) );
-		/* Null return address indicates to use the special
-		 * prefix exit mechanism, and that there are
-		 * parameters on the stack that the prefix wants
-		 * handed to its exit routine.
-		 */
-		if ( rm_data.ret_addr.offset == 0 ) {
-			int n = va_arg ( ap, int ) / 4;
-			int i;
-			for ( i = 0; i < n; i++ ) {
-				in_stack.data[i] = va_arg ( ap, int );
-			}
-		}
-	}
-	
-	/* Hand off to main in_call() routine */
-	ret = in_call ( &in_call_data, opcode, ap );
-
-	/* If real-mode return address is null, it means that we
-	 * should exit via the prefix's exit path, which is part of
-	 * our image.  (This arrangement is necessary since the prefix
-	 * code itself may have been vapourised by the time we want to
-	 * return.)
-	 */
-	if ( ( opcode & EB_CALL_FROM_REAL_MODE ) &&
-	     ( rm_data.ret_addr.offset == 0 ) ) {
-		real_call ( prefix_exit, &in_stack, NULL );
-		/* Should never return */
-	}
-		
-	return ret;
-}
-
-#ifdef	CODE16
-
-/* install_rm_callback_interface(): install real-mode callback
- * interface at specified address.
- *
- * Real-mode code may then call to this address (or lcall to this
- * address plus RM_IN_CALL_FAR) in order to make an in_call() to
- * Etherboot.
- *
- * Returns the size of the installed code, or 0 if the code could not
- * be installed.
- */
-int install_rm_callback_interface ( void *address, size_t available ) {
-	if ( available &&
-	     ( available < rm_callback_interface_size ) ) return 0;
-
-	/* Inform RM code where to find Etherboot */
-	rm_etherboot_location = virt_to_phys(_text);
-
-	/* Install callback interface */
-	memcpy ( address, &rm_callback_interface,
-		 rm_callback_interface_size );
-
-	return rm_callback_interface_size;
-}
-
-#endif	/* CODE16 */