mirror of
https://github.com/joncampbell123/dosbox-x.git
synced 2025-05-07 18:36:09 +08:00
cef4197171
The write side is properly split in little-endian, but for some reason the read side is reconstructing the word/double-words in big-endian format. This never showed up before because ATM _all_ access are byte access anyway because the handler isn't declared as word/dword capable. Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
108 lines
3.1 KiB
C++
108 lines
3.1 KiB
C++
/*
|
|
* Copyright (C) 2002-2021 The DOSBox Team
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef DOSBOX_PCI_H
|
|
#define DOSBOX_PCI_H
|
|
|
|
#define PCI_MAX_PCIBUSSES 255
|
|
#define PCI_MAX_PCIDEVICES 32
|
|
#define PCI_MAX_PCIFUNCTIONS 8
|
|
|
|
class PCI_Device {
|
|
public:
|
|
/* configuration space */
|
|
unsigned char config[256];
|
|
unsigned char config_writemask[256];
|
|
|
|
PCI_Device(uint16_t vendor, uint16_t device);
|
|
virtual ~PCI_Device();
|
|
|
|
/* configuration space assistant functions */
|
|
|
|
uint16_t getDeviceID() {
|
|
return host_readw(config + 0x02);
|
|
}
|
|
void setDeviceID(const uint16_t device) {
|
|
return host_writew(config + 0x02,device);
|
|
}
|
|
|
|
uint16_t getVendorID() {
|
|
return host_readw(config + 0x00);
|
|
}
|
|
void setVendorID(const uint16_t vendor) {
|
|
return host_writew(config + 0x00,vendor);
|
|
}
|
|
|
|
/* configuration space I/O */
|
|
virtual void config_write(uint8_t regnum,Bitu iolen,uint32_t value) {
|
|
if (iolen == 1) {
|
|
const unsigned char mask = config_writemask[regnum];
|
|
const unsigned char nmask = ~mask;
|
|
/* only allow writing to the bits marked off as writeable */
|
|
config[regnum] = (config[regnum] & nmask) + ((unsigned char)value & mask);
|
|
}
|
|
else if (iolen == 4 && (regnum&3) == 2) { /* unaligned DWORD write (subdividable into two WORD writes) */
|
|
config_write(regnum,2,value&0xFFFF);
|
|
config_write(regnum+2,2,value>>16);
|
|
}
|
|
else {
|
|
/* subdivide into 8-bit I/O */
|
|
/* NTS: If I recall, this virtual function call means that we'll call the
|
|
* C++ subclass's config_write() NOT our own--right? */
|
|
for (Bitu i=0;i < iolen;i++) {
|
|
config_write((uint8_t)(regnum+i),1,value&0xFF);
|
|
value >>= 8U;
|
|
}
|
|
}
|
|
}
|
|
virtual uint32_t config_read(uint8_t regnum,Bitu iolen) {
|
|
/* subdivide into 8-bit I/O */
|
|
uint32_t v=0;
|
|
|
|
if (iolen == 1)
|
|
return config[regnum];
|
|
else if (iolen == 4 && (regnum&3) == 2) { /* unaligned DWORD read (subdividable into two WORD reads) */
|
|
v = config_read(regnum,2);
|
|
v += config_read(regnum+2,2) << 16;
|
|
}
|
|
else {
|
|
/* NTS: If I recall, this virtual function call means that we'll call the
|
|
* C++ subclass's config_read() NOT our own--right? */
|
|
for (Bitu i=0;i < iolen;i++)
|
|
v += ((config_read((uint8_t)(regnum+i),1)&0xFF) << (i*8));
|
|
}
|
|
|
|
return v;
|
|
}
|
|
};
|
|
|
|
bool PCI_IsInitialized();
|
|
|
|
void PCI_AddSVGAS3_Device(void);
|
|
void PCI_RemoveSVGAS3_Device(void);
|
|
|
|
void PCI_AddSST_Device(Bitu type);
|
|
void PCI_RemoveSST_Device(void);
|
|
|
|
RealPt PCI_GetPModeInterface(void);
|
|
bool has_pcibus_enable(void);
|
|
|
|
extern bool pcibus_enable;
|
|
|
|
#endif
|