From 73dbe41007d692dac2fe39a29aa89880d936dffa Mon Sep 17 00:00:00 2001 From: Michael Brown Date: Sat, 9 Apr 2005 11:16:17 +0000 Subject: [PATCH] Old callbacks mechanism is obsolete. --- src/arch/i386/core/callbacks.c | 106 --------------------------------- 1 file changed, 106 deletions(-) delete mode 100644 src/arch/i386/core/callbacks.c diff --git a/src/arch/i386/core/callbacks.c b/src/arch/i386/core/callbacks.c deleted file mode 100644 index 8818e146..00000000 --- a/src/arch/i386/core/callbacks.c +++ /dev/null @@ -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 , January 2004. - */ - -#include "etherboot.h" -#include "callbacks.h" -#include "realmode.h" -#include - -/* 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 */