/* * Implementation of stub functions for calls to the TCG BIOS * extension in 32bit memory area. * *  This library is free software; you can redistribute it and/or *  modify it under the terms of the GNU Lesser General Public *  License as published by the Free Software Foundation; either *  version 2 of the License, or (at your option) any later version. * *  This library is distributed in the hope that it will be useful, *  but WITHOUT ANY WARRANTY; without even the implied warranty of *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU *  Lesser General Public License for more details. * *  You should have received a copy of the GNU Lesser General Public *  License along with this library; if not, write to the Free Software *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA * * Copyright (C) IBM Corporation, 2006 * * Author: Stefan Berger <stefanb@us.ibm.com> *//*******************************************************************  Support for TCPA ACPI logging ******************************************************************//* * Extend the ACPI log with the given entry by copying the * entry data into the log. * Input *  Pointer to the structure to be copied into the log * * Output: *  lower 16 bits of return code contain entry number *  if entry number is '0', then upper 16 bits contain error code. */Bit32u tcpa_extend_acpi_log(entry_ptr)    Bit32u entry_ptr;{	ASM_START	DoUpcall(IDX_TCPA_EXTEND_ACPI_LOG)	ASM_END}/*   initialize the TCPA ACPI subsystem; find the ACPI tables and determine   where the TCPA table is. */ voidtcpa_acpi_init(){	ASM_START	DoUpcall(IDX_TCPA_ACPI_INIT)	ASM_END}/* * Add measurement to log about call of int 19h */ voidtcpa_calling_int19h(){	ASM_START	DoUpcall(IDX_TCPA_CALLING_INT19H)	ASM_END}/* * Add measurement to log about retuning from int 19h */ voidtcpa_returned_int19h(){	ASM_START	DoUpcall(IDX_TCPA_RETURNED_INT19H)	ASM_END}/* * Add event separators for PCRs 0 to 7; specs 8.2.3 */ voidtcpa_add_event_separators(){	ASM_START	DoUpcall(IDX_TCPA_ADD_EVENT_SEPARATORS)	ASM_END}/* * Add a wake event to the log */ voidtcpa_wake_event(){	ASM_START	DoUpcall(IDX_TCPA_WAKE_EVENT)	ASM_END}/* * Add measurement to the log about option rom scan * 10.4.3 : action 14 */ voidtcpa_start_option_rom_scan(){	ASM_START	DoUpcall(IDX_TCPA_START_OPTION_ROM_SCAN)	ASM_END}/* * Add measurement to the log about an option rom */ voidtcpa_option_rom(seg)    Bit32u seg;{	ASM_START	DoUpcall(IDX_TCPA_OPTION_ROM)	ASM_END}/* * Add a measurement regarding the boot device (CDRom, Floppy, HDD) to * the list of measurements. */void tcpa_add_bootdevice(bootcd, bootdrv)  Bit32u bootcd;  Bit32u bootdrv;{	ASM_START	DoUpcall(IDX_TCPA_ADD_BOOTDEVICE)	ASM_END}/* * Add a measurement to the log in support of 8.2.5.3 * Creates two log entries * * Input parameter: *  seg    : segment where the IPL data are located */ void tcpa_ipl(bootcd,seg,off,count)    Bit32u bootcd;    Bit32u seg;    Bit32u off;    Bit32u count;{	ASM_START	DoUpcall(IDX_TCPA_IPL)	ASM_END}Bit32utcpa_initialize_tpm(physpres)  Bit32u physpres;{	ASM_START	DoUpcall(IDX_TCPA_INITIALIZE_TPM)	ASM_END}voidtcpa_measure_post(from, to)   Bit32u from;   Bit32u to;{	ASM_START	DoUpcall(IDX_TCPA_MEASURE_POST)	ASM_END}ASM_STARTMACRO POST_MEASURE	push word #0x000f	push #?2	push word #0x000f	push #?1	call _tcpa_measure_post	add sp, #8MENDASM_ENDvoidtcpa_do_measure_POSTs(){	ASM_START	POST_MEASURE(post, nmi)	POST_MEASURE(floppy_drive_post, hard_drive_post)	POST_MEASURE(hard_drive_post, ebda_post)	POST_MEASURE(ebda_post, eoi_jmp_post)	POST_MEASURE(eoi_jmp_post, timer_tick_post)	POST_MEASURE(timer_tick_post, int76_handler)	ret	ASM_END}Bit32uTCGInterruptHandler(regs_ptr, es, ds, flags_ptr)   Bit32u regs_ptr;   Bit16u es;   Bit16u ds;   Bit32u flags_ptr;{	ASM_START	DoUpcall(IDX_TCGINTERRUPTHANDLER)	ASM_END}/* * C-dispatcher for the TCG BIOS functions */#define TCG_MAGIC 0x41504354L  voidint1a_function32(regs, ES, DS, FLAGS)  pushad_regs_t regs;  Bit16u ES, DS, FLAGS;{	Bit16u rc;	BX_DEBUG_INT1A("int1a_32: AX=%04x\n", regs.u.r16.ax);	switch (regs.u.r8.ah) {	case 0xbb:		/*		 * all functions except for TCG_StatusCheck need to have the		 * TCG_MAGIC in 'ebx'.		 */		if (regs.u.r8.al != 0 &&		    regs.u.r32.ebx != TCG_MAGIC) {		    SET_CF();		    return;		}		switch(regs.u.r8.al) {		case 0x00:		case 0x01:		case 0x02:		case 0x03:		case 0x04:		case 0x05:		case 0x06:		case 0x07:			TCGInterruptHandler(((Bit32u)get_SS() << 4) + (Bit32u)&regs,			                    ES, DS,			                    ((Bit32u)get_SS() << 4) + (Bit32u)&FLAGS);			break;		default:			SET_CF();		}		break;	default:		SET_CF();		break;	}	BX_DEBUG_INT1A("int1a_32: FLAGS=%04x\n", FLAGS);}