|
|
|
|
/****************************************************************************
|
|
|
|
|
*
|
|
|
|
|
* BIOS emulator and interface
|
|
|
|
|
* to Realmode X86 Emulator Library
|
|
|
|
|
*
|
|
|
|
|
* Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
|
|
|
|
|
* Jason Jin <Jason.jin@freescale.com>
|
|
|
|
|
*
|
|
|
|
|
* Copyright (C) 1996-1999 SciTech Software, Inc.
|
|
|
|
|
*
|
|
|
|
|
* ========================================================================
|
|
|
|
|
*
|
|
|
|
|
* Permission to use, copy, modify, distribute, and sell this software and
|
|
|
|
|
* its documentation for any purpose is hereby granted without fee,
|
|
|
|
|
* provided that the above copyright notice appear in all copies and that
|
|
|
|
|
* both that copyright notice and this permission notice appear in
|
|
|
|
|
* supporting documentation, and that the name of the authors not be used
|
|
|
|
|
* in advertising or publicity pertaining to distribution of the software
|
|
|
|
|
* without specific, written prior permission. The authors makes no
|
|
|
|
|
* representations about the suitability of this software for any purpose.
|
|
|
|
|
* It is provided "as is" without express or implied warranty.
|
|
|
|
|
*
|
|
|
|
|
* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
|
|
|
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
|
|
|
|
|
* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
|
|
|
|
|
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
|
|
|
|
|
* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
|
|
|
|
|
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
|
|
|
|
|
* PERFORMANCE OF THIS SOFTWARE.
|
|
|
|
|
*
|
|
|
|
|
* ========================================================================
|
|
|
|
|
*
|
|
|
|
|
* Language: ANSI C
|
|
|
|
|
* Environment: Any
|
|
|
|
|
* Developer: Kendall Bennett
|
|
|
|
|
*
|
|
|
|
|
* Description: Module implementing the BIOS specific functions.
|
|
|
|
|
*
|
|
|
|
|
* Jason ported this file to u-boot to run the ATI video card
|
|
|
|
|
* video BIOS.
|
|
|
|
|
*
|
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
|
|
#include <common.h>
|
|
|
|
|
|
|
|
|
|
#if defined(CONFIG_BIOSEMU)
|
|
|
|
|
|
|
|
|
|
#include "biosemui.h"
|
|
|
|
|
|
|
|
|
|
/*----------------------------- Implementation ----------------------------*/
|
|
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
|
PARAMETERS:
|
|
|
|
|
intno - Interrupt number being serviced
|
|
|
|
|
|
|
|
|
|
REMARKS:
|
|
|
|
|
Handler for undefined interrupts.
|
|
|
|
|
****************************************************************************/
|
|
|
|
|
static void X86API undefined_intr(int intno)
|
|
|
|
|
{
|
|
|
|
|
if (BE_rdw(intno * 4 + 2) == BIOS_SEG) {
|
|
|
|
|
DB(printf("biosEmu: undefined interrupt %xh called!\n", intno);)
|
|
|
|
|
} else
|
|
|
|
|
X86EMU_prepareForInt(intno);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
|
PARAMETERS:
|
|
|
|
|
intno - Interrupt number being serviced
|
|
|
|
|
|
|
|
|
|
REMARKS:
|
|
|
|
|
This function handles the default system BIOS Int 10h (the default is stored
|
|
|
|
|
in the Int 42h vector by the system BIOS at bootup). We only need to handle
|
|
|
|
|
a small number of special functions used by the BIOS during POST time.
|
|
|
|
|
****************************************************************************/
|
|
|
|
|
static void X86API int42(int intno)
|
|
|
|
|
{
|
|
|
|
|
if (M.x86.R_AH == 0x12 && M.x86.R_BL == 0x32) {
|
|
|
|
|
if (M.x86.R_AL == 0) {
|
|
|
|
|
/* Enable CPU accesses to video memory */
|
|
|
|
|
PM_outpb(0x3c2, PM_inpb(0x3cc) | (u8) 0x02);
|
|
|
|
|
return;
|
|
|
|
|
} else if (M.x86.R_AL == 1) {
|
|
|
|
|
/* Disable CPU accesses to video memory */
|
|
|
|
|
PM_outpb(0x3c2, PM_inpb(0x3cc) & (u8) ~ 0x02);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
|
else {
|
|
|
|
|
printf("int42: unknown function AH=0x12, BL=0x32, AL=%#02x\n",
|
|
|
|
|
M.x86.R_AL);
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
|
else {
|
|
|
|
|
printf("int42: unknown function AH=%#02x, AL=%#02x, BL=%#02x\n",
|
|
|
|
|
M.x86.R_AH, M.x86.R_AL, M.x86.R_BL);
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
|
PARAMETERS:
|
|
|
|
|
intno - Interrupt number being serviced
|
|
|
|
|
|
|
|
|
|
REMARKS:
|
|
|
|
|
This function handles the default system BIOS Int 10h. If the POST code
|
|
|
|
|
has not yet re-vectored the Int 10h BIOS interrupt vector, we handle this
|
|
|
|
|
by simply calling the int42 interrupt handler above. Very early in the
|
|
|
|
|
BIOS POST process, the vector gets replaced and we simply let the real
|
|
|
|
|
mode interrupt handler process the interrupt.
|
|
|
|
|
****************************************************************************/
|
|
|
|
|
static void X86API int10(int intno)
|
|
|
|
|
{
|
|
|
|
|
if (BE_rdw(intno * 4 + 2) == BIOS_SEG)
|
|
|
|
|
int42(intno);
|
|
|
|
|
else
|
|
|
|
|
X86EMU_prepareForInt(intno);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Result codes returned by the PCI BIOS */
|
|
|
|
|
|
|
|
|
|
#define SUCCESSFUL 0x00
|
|
|
|
|
#define FUNC_NOT_SUPPORT 0x81
|
|
|
|
|
#define BAD_VENDOR_ID 0x83
|
|
|
|
|
#define DEVICE_NOT_FOUND 0x86
|
|
|
|
|
#define BAD_REGISTER_NUMBER 0x87
|
|
|
|
|
#define SET_FAILED 0x88
|
|
|
|
|
#define BUFFER_TOO_SMALL 0x89
|
|
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
|
PARAMETERS:
|
|
|
|
|
intno - Interrupt number being serviced
|
|
|
|
|
|
|
|
|
|
REMARKS:
|
|
|
|
|
This function handles the default Int 1Ah interrupt handler for the real
|
|
|
|
|
mode code, which provides support for the PCI BIOS functions. Since we only
|
|
|
|
|
want to allow the real mode BIOS code *only* see the PCI config space for
|
|
|
|
|
its own device, we only return information for the specific PCI config
|
|
|
|
|
space that we have passed in to the init function. This solves problems
|
|
|
|
|
when using the BIOS to warm boot a secondary adapter when there is an
|
|
|
|
|
identical adapter before it on the bus (some BIOS'es get confused in this
|
|
|
|
|
case).
|
|
|
|
|
****************************************************************************/
|
|
|
|
|
static void X86API int1A(int unused)
|
|
|
|
|
{
|
|
|
|
|
u16 pciSlot;
|
|
|
|
|
|
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
|
u8 interface, subclass, baseclass;
|
|
|
|
|
|
|
|
|
|
/* Initialise the PCI slot number */
|
|
|
|
|
pciSlot = ((int)_BE_env.vgaInfo.bus << 8) |
|
|
|
|
|
((int)_BE_env.vgaInfo.device << 3) | (int)_BE_env.vgaInfo.function;
|
|
|
|
|
#else
|
|
|
|
|
/* Fail if no PCI device information has been registered */
|
|
|
|
|
if (!_BE_env.vgaInfo.pciInfo)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
pciSlot = (u16) (_BE_env.vgaInfo.pciInfo->slot.i >> 8);
|
|
|
|
|
#endif
|
|
|
|
|
switch (M.x86.R_AX) {
|
|
|
|
|
case 0xB101: /* PCI bios present? */
|
|
|
|
|
M.x86.R_AL = 0x00; /* no config space/special cycle generation support */
|
|
|
|
|
M.x86.R_EDX = 0x20494350; /* " ICP" */
|
|
|
|
|
M.x86.R_BX = 0x0210; /* Version 2.10 */
|
|
|
|
|
M.x86.R_CL = 0; /* Max bus number in system */
|
|
|
|
|
CLEAR_FLAG(F_CF);
|
|
|
|
|
break;
|
|
|
|
|
case 0xB102: /* Find PCI device */
|
|
|
|
|
M.x86.R_AH = DEVICE_NOT_FOUND;
|
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
|
if (M.x86.R_DX == _BE_env.vgaInfo.VendorID &&
|
|
|
|
|
M.x86.R_CX == _BE_env.vgaInfo.DeviceID && M.x86.R_SI == 0) {
|
|
|
|
|
#else
|
|
|
|
|
if (M.x86.R_DX == _BE_env.vgaInfo.pciInfo->VendorID &&
|
|
|
|
|
M.x86.R_CX == _BE_env.vgaInfo.pciInfo->DeviceID &&
|
|
|
|
|
M.x86.R_SI == 0) {
|
|
|
|
|
#endif
|
|
|
|
|
M.x86.R_AH = SUCCESSFUL;
|
|
|
|
|
M.x86.R_BX = pciSlot;
|
|
|
|
|
}
|
|
|
|
|
CONDITIONAL_SET_FLAG((M.x86.R_AH != SUCCESSFUL), F_CF);
|
|
|
|
|
break;
|
|
|
|
|
case 0xB103: /* Find PCI class code */
|
|
|
|
|
M.x86.R_AH = DEVICE_NOT_FOUND;
|
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
|
pci_read_config_byte(_BE_env.vgaInfo.pcidev, PCI_CLASS_PROG,
|
|
|
|
|
&interface);
|
|
|
|
|
pci_read_config_byte(_BE_env.vgaInfo.pcidev, PCI_CLASS_DEVICE,
|
|
|
|
|
&subclass);
|
|
|
|
|
pci_read_config_byte(_BE_env.vgaInfo.pcidev,
|
|
|
|
|
PCI_CLASS_DEVICE + 1, &baseclass);
|
|
|
|
|
if (M.x86.R_CL == interface && M.x86.R_CH == subclass
|
|
|
|
|
&& (u8) (M.x86.R_ECX >> 16) == baseclass) {
|
|
|
|
|
#else
|
|
|
|
|
if (M.x86.R_CL == _BE_env.vgaInfo.pciInfo->Interface &&
|
|
|
|
|
M.x86.R_CH == _BE_env.vgaInfo.pciInfo->SubClass &&
|
|
|
|
|
(u8) (M.x86.R_ECX >> 16) ==
|
|
|
|
|
_BE_env.vgaInfo.pciInfo->BaseClass) {
|
|
|
|
|
#endif
|
|
|
|
|
M.x86.R_AH = SUCCESSFUL;
|
|
|
|
|
M.x86.R_BX = pciSlot;
|
|
|
|
|
}
|
|
|
|
|
CONDITIONAL_SET_FLAG((M.x86.R_AH != SUCCESSFUL), F_CF);
|
|
|
|
|
break;
|
|
|
|
|
case 0xB108: /* Read configuration byte */
|
|
|
|
|
M.x86.R_AH = BAD_REGISTER_NUMBER;
|
|
|
|
|
if (M.x86.R_BX == pciSlot) {
|
|
|
|
|
M.x86.R_AH = SUCCESSFUL;
|
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
|
pci_read_config_byte(_BE_env.vgaInfo.pcidev, M.x86.R_DI,
|
|
|
|
|
&M.x86.R_CL);
|
|
|
|
|
#else
|
|
|
|
|
M.x86.R_CL =
|
|
|
|
|
(u8) PCI_accessReg(M.x86.R_DI, 0, PCI_READ_BYTE,
|
|
|
|
|
_BE_env.vgaInfo.pciInfo);
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
CONDITIONAL_SET_FLAG((M.x86.R_AH != SUCCESSFUL), F_CF);
|
|
|
|
|
break;
|
|
|
|
|
case 0xB109: /* Read configuration word */
|
|
|
|
|
M.x86.R_AH = BAD_REGISTER_NUMBER;
|
|
|
|
|
if (M.x86.R_BX == pciSlot) {
|
|
|
|
|
M.x86.R_AH = SUCCESSFUL;
|
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
|
pci_read_config_word(_BE_env.vgaInfo.pcidev, M.x86.R_DI,
|
|
|
|
|
&M.x86.R_CX);
|
|
|
|
|
#else
|
|
|
|
|
M.x86.R_CX =
|
|
|
|
|
(u16) PCI_accessReg(M.x86.R_DI, 0, PCI_READ_WORD,
|
|
|
|
|
_BE_env.vgaInfo.pciInfo);
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
CONDITIONAL_SET_FLAG((M.x86.R_AH != SUCCESSFUL), F_CF);
|
|
|
|
|
break;
|
|
|
|
|
case 0xB10A: /* Read configuration dword */
|
|
|
|
|
M.x86.R_AH = BAD_REGISTER_NUMBER;
|
|
|
|
|
if (M.x86.R_BX == pciSlot) {
|
|
|
|
|
M.x86.R_AH = SUCCESSFUL;
|
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
|
pci_read_config_dword(_BE_env.vgaInfo.pcidev,
|
|
|
|
|
M.x86.R_DI, &M.x86.R_ECX);
|
|
|
|
|
#else
|
|
|
|
|
M.x86.R_ECX =
|
|
|
|
|
(u32) PCI_accessReg(M.x86.R_DI, 0, PCI_READ_DWORD,
|
|
|
|
|
_BE_env.vgaInfo.pciInfo);
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
CONDITIONAL_SET_FLAG((M.x86.R_AH != SUCCESSFUL), F_CF);
|
|
|
|
|
break;
|
|
|
|
|
case 0xB10B: /* Write configuration byte */
|
|
|
|
|
M.x86.R_AH = BAD_REGISTER_NUMBER;
|
|
|
|
|
if (M.x86.R_BX == pciSlot) {
|
|
|
|
|
M.x86.R_AH = SUCCESSFUL;
|
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
|
pci_write_config_byte(_BE_env.vgaInfo.pcidev,
|
|
|
|
|
M.x86.R_DI, M.x86.R_CL);
|
|
|
|
|
#else
|
|
|
|
|
PCI_accessReg(M.x86.R_DI, M.x86.R_CL, PCI_WRITE_BYTE,
|
|
|
|
|
_BE_env.vgaInfo.pciInfo);
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
CONDITIONAL_SET_FLAG((M.x86.R_AH != SUCCESSFUL), F_CF);
|
|
|
|
|
break;
|
|
|
|
|
case 0xB10C: /* Write configuration word */
|
|
|
|
|
M.x86.R_AH = BAD_REGISTER_NUMBER;
|
|
|
|
|
if (M.x86.R_BX == pciSlot) {
|
|
|
|
|
M.x86.R_AH = SUCCESSFUL;
|
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
|
pci_write_config_word(_BE_env.vgaInfo.pcidev,
|
|
|
|
|
M.x86.R_DI, M.x86.R_CX);
|
|
|
|
|
#else
|
|
|
|
|
PCI_accessReg(M.x86.R_DI, M.x86.R_CX, PCI_WRITE_WORD,
|
|
|
|
|
_BE_env.vgaInfo.pciInfo);
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
CONDITIONAL_SET_FLAG((M.x86.R_AH != SUCCESSFUL), F_CF);
|
|
|
|
|
break;
|
|
|
|
|
case 0xB10D: /* Write configuration dword */
|
|
|
|
|
M.x86.R_AH = BAD_REGISTER_NUMBER;
|
|
|
|
|
if (M.x86.R_BX == pciSlot) {
|
|
|
|
|
M.x86.R_AH = SUCCESSFUL;
|
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
|
pci_write_config_dword(_BE_env.vgaInfo.pcidev,
|
|
|
|
|
M.x86.R_DI, M.x86.R_ECX);
|
|
|
|
|
#else
|
|
|
|
|
PCI_accessReg(M.x86.R_DI, M.x86.R_ECX, PCI_WRITE_DWORD,
|
|
|
|
|
_BE_env.vgaInfo.pciInfo);
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
CONDITIONAL_SET_FLAG((M.x86.R_AH != SUCCESSFUL), F_CF);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
printf("biosEmu/bios.int1a: unknown function AX=%#04x\n",
|
|
|
|
|
M.x86.R_AX);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
|
REMARKS:
|
|
|
|
|
This function initialises the BIOS emulation functions for the specific
|
|
|
|
|
PCI display device. We insulate the real mode BIOS from any other devices
|
|
|
|
|
on the bus, so that it will work correctly thinking that it is the only
|
|
|
|
|
device present on the bus (ie: avoiding any adapters present in from of
|
|
|
|
|
the device we are trying to control).
|
|
|
|
|
****************************************************************************/
|
|
|
|
|
#define BE_constLE_32(v) ((((((v)&0xff00)>>8)|(((v)&0xff)<<8))<<16)|(((((v)&0xff000000)>>8)|(((v)&0x00ff0000)<<8))>>16))
|
|
|
|
|
|
|
|
|
|
void _BE_bios_init(u32 * intrTab)
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
X86EMU_intrFuncs bios_intr_tab[256];
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < 256; ++i) {
|
|
|
|
|
intrTab[i] = BE_constLE_32(BIOS_SEG << 16);
|
|
|
|
|
bios_intr_tab[i] = undefined_intr;
|
|
|
|
|
}
|
|
|
|
|
bios_intr_tab[0x10] = int10;
|
|
|
|
|
bios_intr_tab[0x1A] = int1A;
|
|
|
|
|
bios_intr_tab[0x42] = int42;
|
|
|
|
|
bios_intr_tab[0x6D] = int10;
|
|
|
|
|
X86EMU_setupIntrFuncs(bios_intr_tab);
|
|
|
|
|
}
|
|
|
|
|
#endif
|
