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c818baa0c9
Bochs/bochs/iodev/devices.cc
Bryce Denney c818baa0c9 - modified every I/O device so that it will not re-register its timers 
if init() is called a second time.  This allows me to restart a
  simulation (wxwindows interface only) without restarting the whole
  application.
- modified: iodev/*.cc
2002-10-06 19:04:47 +00:00

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/////////////////////////////////////////////////////////////////////////
// $Id: devices.cc,v 1.35 2002-10-06 19:04:47 bdenney Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
//
// MandrakeSoft S.A.
// 43, rue d'Aboukir
// 75002 Paris - France
// http://www.linux-mandrake.com/
// http://www.mandrakesoft.com/
//
// 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
#include "bochs.h"
#define LOG_THIS bx_devices.
/* main memory size (in Kbytes)
* subtract 1k for extended BIOS area
* report only base memory, not extended mem
*/
#define BASE_MEMORY_IN_K 640
bx_devices_c bx_devices;
// constructor for bx_devices_c
bx_devices_c::bx_devices_c(void)
{
put("DEV");
settype(DEVLOG);
#if BX_PCI_SUPPORT
pci = NULL;
pci2isa = NULL;
#endif
pit = NULL;
keyboard = NULL;
dma = NULL;
floppy = NULL;
biosdev = NULL;
cmos = NULL;
serial = NULL;
parallel = NULL;
unmapped = NULL;
vga = NULL;
pic = NULL;
hard_drive = NULL;
sb16 = NULL;
ne2k = NULL;
g2h = NULL;
#if BX_IODEBUG_SUPPORT
iodebug = NULL;
#endif
}
bx_devices_c::~bx_devices_c(void)
{
// nothing needed for now
BX_DEBUG(("Exit."));
timer_handle = BX_NULL_TIMER_HANDLE;
}
void
bx_devices_c::init(BX_MEM_C *newmem)
{
unsigned i;
BX_DEBUG(("Init $Id: devices.cc,v 1.35 2002-10-06 19:04:47 bdenney Exp $"));
mem = newmem;
/* no read / write handlers defined */
num_read_handles = 0;
num_write_handles = 0;
/* set unused elements to appropriate values */
for (i=0; i < BX_MAX_IO_DEVICES; i++) {
io_read_handler[i].funct = NULL;
io_write_handler[i].funct = NULL;
}
for (i=0; i < 0x10000; i++) {
read_handler_id[i] = BX_MAX_IO_DEVICES; // not assigned
write_handler_id[i] = BX_MAX_IO_DEVICES; // not assigned
}
for (i=0; i < BX_MAX_IRQS; i++) {
irq_handler_name[i] = NULL;
}
// Start with all IO port address registered to unmapped handler
// MUST be called first
unmapped = &bx_unmapped;
unmapped->init(this);
#if BX_PCI_SUPPORT
// PCI logic (i440FX)
pci = & bx_pci;
pci->init(this);
pci2isa = & bx_pci2isa;
pci2isa->init(this);
#endif
#if BX_SUPPORT_APIC
// I/O APIC 82093AA
ioapic = & bx_ioapic;
ioapic->init ();
ioapic->set_id (BX_IOAPIC_DEFAULT_ID);
#endif
// BIOS log
biosdev = &bx_biosdev;
biosdev->init(this);
// CMOS RAM & RTC
cmos = &bx_cmos;
cmos->init(this);
/*--- 8237 DMA ---*/
dma = &bx_dma;
dma->init(this);
/*--- HARD DRIVE ---*/
hard_drive = &bx_hard_drive;
hard_drive->init(this, cmos);
//--- FLOPPY ---
floppy = &bx_floppy;
floppy->init(this, cmos);
#if BX_SUPPORT_SB16
//--- SOUND ---
sb16 = &bx_sb16;
sb16->init(this);
#endif
#if BX_SUPPORT_VGA
/*--- VGA adapter ---*/
vga = & bx_vga;
vga->init(this, cmos);
#else
/*--- HGA adapter ---*/
bx_init_hga_hardware(cmos);
#endif
/*--- 8259A PIC ---*/
pic = & bx_pic;
pic->init(this);
/*--- 8254 PIT ---*/
pit = & bx_pit;
pit->init(this);
#if BX_USE_SLOWDOWN_TIMER
bx_slowdown_timer.init(this);
#endif
keyboard = &bx_keyboard;
keyboard->init(this, cmos);
#if BX_IODEBUG_SUPPORT
iodebug = &bx_iodebug;
iodebug->init(this);
#endif
/*--- PARALLEL PORT ---*/
parallel = &bx_parallel;
parallel->init(this);
/*--- SERIAL PORT ---*/
serial = &bx_serial;
serial->init(this);
#if BX_NE2K_SUPPORT
// NE2000 NIC
ne2k = &bx_ne2k;
ne2k->init(this);
BX_DEBUG(("ne2k"));
#endif // #if BX_NE2K_SUPPORT
#if 0
// Guest to Host interface. Used with special guest drivers
// which move data to/from the host environment.
g2h = &bx_g2h;
g2h->init(this);
#endif
// system hardware
register_io_read_handler( this,
&read_handler,
0x0092,
"Port 92h System Control" );
register_io_write_handler(this,
&write_handler,
0x0092,
"Port 92h System Control" );
// misc. CMOS
Bit16u extended_memory_in_k = mem->get_memory_in_k() - 1024;
cmos->s.reg[0x15] = (Bit8u) BASE_MEMORY_IN_K;
cmos->s.reg[0x16] = (Bit8u) (BASE_MEMORY_IN_K >> 8);
cmos->s.reg[0x17] = (Bit8u) extended_memory_in_k;
cmos->s.reg[0x18] = (Bit8u) (extended_memory_in_k >> 8);
cmos->s.reg[0x30] = (Bit8u) extended_memory_in_k;
cmos->s.reg[0x31] = (Bit8u) (extended_memory_in_k >> 8);
/* now perform checksum of CMOS memory */
cmos->checksum_cmos();
if (timer_handle != BX_NULL_TIMER_HANDLE) {
timer_handle = bx_pc_system.register_timer( this, timer_handler,
(unsigned) BX_IODEV_HANDLER_PERIOD, 1, 1, "devices.cc");
}
// Clear fields for bulk IO acceleration transfers.
bulkIOHostAddr = 0;
bulkIOQuantumsRequested = 0;
bulkIOQuantumsTransferred = 0;
}
void
bx_devices_c::reset(unsigned type)
{
#if BX_PCI_SUPPORT
pci->reset(type);
pci2isa->reset(type);
#endif
#if BX_SUPPORT_IOAPIC
ioapic->reset (type);
#endif
biosdev->reset(type);
cmos->reset(type);
dma->reset(type);
hard_drive->reset(type);
floppy->reset(type);
#if BX_SUPPORT_SB16
sb16->reset(type);
#endif
#if BX_SUPPORT_VGA
vga->reset(type);
#else
// reset hga hardware?
#endif
pic->reset(type);
pit->reset(type);
#if BX_USE_SLOWDOWN_TIMER
bx_slowdown_timer.reset(type);
#endif
keyboard->reset(type);
#if BX_IODEBUG_SUPPORT
iodebug->reset(type);
#endif
parallel->reset(type);
serial->reset(type);
#if BX_NE2K_SUPPORT
ne2k->reset(type);
#endif
}
Bit32u
bx_devices_c::read_handler(void *this_ptr, Bit32u address, unsigned io_len)
{
#if !BX_USE_DEV_SMF
bx_devices_c *class_ptr = (bx_devices_c *) this_ptr;
return( class_ptr->port92_read(address, io_len) );
}
Bit32u
bx_devices_c::port92_read(Bit32u address, unsigned io_len)
{
#else
UNUSED(this_ptr);
#endif // !BX_USE_DEV_SMF
if (io_len > 1)
BX_PANIC(("port 92h: io read from address %08x, len=%u",
(unsigned) address, (unsigned) io_len));
BX_DEBUG(("port92h read partially supported!!!"));
BX_DEBUG((" returning %02x", (unsigned) (BX_GET_ENABLE_A20() << 1)));
return(BX_GET_ENABLE_A20() << 1);
}
void
bx_devices_c::write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len)
{
#if !BX_USE_DEV_SMF
bx_devices_c *class_ptr = (bx_devices_c *) this_ptr;
class_ptr->port92_write(address, value, io_len);
}
void
bx_devices_c::port92_write(Bit32u address, Bit32u value, unsigned io_len)
{
#else
UNUSED(this_ptr);
#endif // !BX_USE_DEV_SMF
Boolean bx_cpu_reset;
if (io_len > 1)
BX_PANIC(("port 92h: io read from address %08x, len=%u",
(unsigned) address, (unsigned) io_len));
BX_DEBUG(("port92h write of %02x partially supported!!!",
(unsigned) value));
BX_DEBUG(("A20: set_enable_a20() called"));
BX_SET_ENABLE_A20( (value & 0x02) >> 1 );
BX_DEBUG(("A20: now %u", (unsigned) BX_GET_ENABLE_A20()));
bx_cpu_reset = (value & 0x01); /* high speed reset */
if (bx_cpu_reset) {
BX_PANIC(("PORT 92h write: CPU reset requested!"));
}
}
void
bx_devices_c::timer_handler(void *this_ptr)
{
bx_devices_c *class_ptr = (bx_devices_c *) this_ptr;
class_ptr->timer();
}
void
bx_devices_c::timer()
{
unsigned retval;
#if (BX_USE_NEW_PIT==0)
if ( pit->periodic( BX_IODEV_HANDLER_PERIOD ) ) {
// This is a hack to make the IRQ0 work
pic->lower_irq(0);
pic->raise_irq(0);
}
#endif
retval = keyboard->periodic( BX_IODEV_HANDLER_PERIOD );
if (retval & 0x01)
pic->raise_irq(1);
if (retval & 0x02)
pic->raise_irq(12);
// KPL Removed lapic periodic timer registration here.
}
Boolean
bx_devices_c::register_irq(unsigned irq, const char *name)
{
if (irq >= BX_MAX_IRQS) {
BX_PANIC(("IO device %s registered with IRQ=%d above %u",
name, irq, (unsigned) BX_MAX_IRQS-1));
return false;
}
if (irq_handler_name[irq]) {
BX_PANIC(("IRQ %u conflict, %s with %s", irq,
irq_handler_name[irq], name));
return false;
}
irq_handler_name[irq] = name;
return true;
}
Boolean
bx_devices_c::unregister_irq(unsigned irq, const char *name)
{
if (irq >= BX_MAX_IRQS) {
BX_PANIC(("IO device %s tried to unregister IRQ %d above %u",
name, irq, (unsigned) BX_MAX_IRQS-1));
return false;
}
if (!irq_handler_name[irq]) {
BX_INFO(("IO device %s tried to unregister IRQ %d, not registered",
name, irq));
return false;
}
if (strcmp(irq_handler_name[irq], name)) {
BX_INFO(("IRQ %u not registered to %s but to %s", irq,
name, irq_handler_name[irq]));
return false;
}
irq_handler_name[irq] = NULL;
return true;
}
Boolean
bx_devices_c::register_io_read_handler( void *this_ptr, bx_read_handler_t f,
Bit32u addr, const char *name )
{
unsigned handle;
addr &= 0x0000ffff;
/* first find existing handle for function or create new one */
for (handle=0; handle < num_read_handles; handle++) {
if (io_read_handler[handle].funct == f) break;
}
if (handle >= num_read_handles) {
/* no existing handle found, create new one */
if (num_read_handles >= BX_MAX_IO_DEVICES) {
BX_INFO(("too many IO devices installed."));
BX_PANIC((" try increasing BX_MAX_IO_DEVICES"));
}
num_read_handles++;
io_read_handler[handle].funct = f;
io_read_handler[handle].this_ptr = this_ptr;
io_read_handler[handle].handler_name = name;
}
/* change table to reflect new handler id for that address */
if (read_handler_id[addr] < BX_MAX_IO_DEVICES) {
// another handler is already registered for that address
// if it is not the Unmapped port handler, bail
if ( strcmp( io_read_handler[read_handler_id[addr]].handler_name, "Unmapped" ) ) {
BX_INFO(("IO device address conflict(read) at IO address %Xh",
(unsigned) addr));
BX_INFO((" conflicting devices: %s & %s",
io_read_handler[handle].handler_name, io_read_handler[read_handler_id[addr]].handler_name));
return false; // address not available, return false.
}
}
read_handler_id[addr] = handle;
return true; // address mapped successfully
}
Boolean
bx_devices_c::register_io_write_handler( void *this_ptr, bx_write_handler_t f,
Bit32u addr, const char *name )
{
unsigned handle;
addr &= 0x0000ffff;
/* first find existing handle for function or create new one */
for (handle=0; handle < num_write_handles; handle++) {
if (io_write_handler[handle].funct == f) break;
}
if (handle >= num_write_handles) {
/* no existing handle found, create new one */
if (num_write_handles >= BX_MAX_IO_DEVICES) {
BX_INFO(("too many IO devices installed."));
BX_PANIC((" try increasing BX_MAX_IO_DEVICES"));
}
num_write_handles++;
io_write_handler[handle].funct = f;
io_write_handler[handle].this_ptr = this_ptr;
io_write_handler[handle].handler_name = name;
}
/* change table to reflect new handler id for that address */
if (write_handler_id[addr] < BX_MAX_IO_DEVICES) {
// another handler is already registered for that address
// if it is not the Unmapped port handler, bail
if ( strcmp( io_write_handler[write_handler_id[addr]].handler_name, "Unmapped" ) ) {
BX_INFO(("IO device address conflict(write) at IO address %Xh",
(unsigned) addr));
BX_INFO((" conflicting devices: %s & %s",
io_write_handler[handle].handler_name, io_write_handler[write_handler_id[addr]].handler_name));
return false; //unable to map iodevice.
}
}
write_handler_id[addr] = handle;
return true; // done!
}
/*
* Read a byte of data from the IO memory address space
*/
Bit32u
bx_devices_c::inp(Bit16u addr, unsigned io_len)
{
Bit8u handle;
Bit32u ret;
BX_INSTR_INP(addr, io_len);
handle = read_handler_id[addr];
ret = (* io_read_handler[handle].funct)(io_read_handler[handle].this_ptr,
(Bit32u) addr, io_len);
BX_INSTR_INP2(addr, io_len, ret);
BX_DBG_IO_REPORT(addr, io_len, BX_READ, ret);
return(ret);
}
/*
* Write a byte of data to the IO memory address space.
*/
void
bx_devices_c::outp(Bit16u addr, Bit32u value, unsigned io_len)
{
Bit8u handle;
BX_INSTR_OUTP(addr, io_len);
BX_INSTR_OUTP2(addr, io_len, value);
BX_DBG_IO_REPORT(addr, io_len, BX_WRITE, value);
handle = write_handler_id[addr];
(* io_write_handler[handle].funct)(io_write_handler[handle].this_ptr,
(Bit32u) addr, value, io_len);
}
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