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/*
* 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.
*/
void
tcpa_acpi_init()
{
ASM_START
DoUpcall IDX_TCPA_ACPI_INIT
ASM_END
}
/*
* Add measurement to log about call of int 19h
*/
void
tcpa_calling_int19h()
{
ASM_START
DoUpcall IDX_TCPA_CALLING_INT19H
ASM_END
}
/*
* Add measurement to log about retuning from int 19h
*/
void
tcpa_returned_int19h()
{
ASM_START
DoUpcall IDX_TCPA_RETURNED_INT19H
ASM_END
}
/*
* Add event separators for PCRs 0 to 7; specs 8.2.3
*/
void
tcpa_add_event_separators()
{
ASM_START
DoUpcall IDX_TCPA_ADD_EVENT_SEPARATORS
ASM_END
}
/*
* Add a wake event to the log
*/
void
tcpa_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
*/
void
tcpa_start_option_rom_scan()
{
ASM_START
DoUpcall IDX_TCPA_START_OPTION_ROM_SCAN
ASM_END
}
/*
* Add measurement to the log about an option rom
*/
void
tcpa_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(seg)
Bit32u seg;
{
ASM_START
DoUpcall IDX_TCPA_IPL
ASM_END
}
Bit32u
tcpa_initialize_tpm(physpres)
Bit32u physpres;
{
ASM_START
DoUpcall IDX_TCPA_INITIALIZE_TPM
ASM_END
}
void
tcpa_measure_post(from, to)
Bit32u from;
Bit32u to;
{
ASM_START
DoUpcall IDX_TCPA_MEASURE_POST
ASM_END
}
ASM_START
MACRO POST_MEASURE
push word #0x000f
push #?2
push word #0x000f
push #?1
call _tcpa_measure_post
add sp, #8
MEND
ASM_END
void
tcpa_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
}
Bit32u
TCGInterruptHandler(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
void
int1a_function32(regs, ES, DS, FLAGS)
pushad_regs_t regs;
Bit16u ES, DS, FLAGS;
{
Bit16u rc;
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)®s,
ES, DS,
((Bit32u)get_SS() << 4) + (Bit32u)&FLAGS);
break;
default:
SET_CF();
}
default:
SET_CF();
break;
}
}
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