///////////////////////////////////////////////////////////////////////// // $Id: pci2isa.cc,v 1.26 2006-03-07 18:16:40 sshwarts 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 // // i440FX Support - PCI-to-ISA bridge (PIIX3) // // Define BX_PLUGGABLE in files that can be compiled into plugins. For // platforms that require a special tag on exported symbols, BX_PLUGGABLE // is used to know when we are exporting symbols and when we are importing. #define BX_PLUGGABLE #include "iodev.h" #if BX_SUPPORT_PCI #define LOG_THIS thePci2IsaBridge-> bx_pci2isa_c *thePci2IsaBridge = NULL; int libpci2isa_LTX_plugin_init(plugin_t *plugin, plugintype_t type, int argc, char *argv[]) { thePci2IsaBridge = new bx_pci2isa_c (); bx_devices.pluginPci2IsaBridge = thePci2IsaBridge; BX_REGISTER_DEVICE_DEVMODEL(plugin, type, thePci2IsaBridge, BX_PLUGIN_PCI2ISA); return(0); // Success } void libpci2isa_LTX_plugin_fini(void) {} bx_pci2isa_c::bx_pci2isa_c() { put("P2I"); settype(PCI2ISALOG); } bx_pci2isa_c::~bx_pci2isa_c() { // nothing for now } void bx_pci2isa_c::init(void) { unsigned i; // called once when bochs initializes Bit8u devfunc = BX_PCI_DEVICE(1,0); DEV_register_pci_handlers(this, pci_read_handler, pci_write_handler, &devfunc, BX_PLUGIN_PCI2ISA, "PIIX3 PCI-to-ISA bridge"); DEV_register_iowrite_handler(this, write_handler, 0x00B2, "PIIX3 PCI-to-ISA bridge", 1); DEV_register_iowrite_handler(this, write_handler, 0x00B3, "PIIX3 PCI-to-ISA bridge", 1); DEV_register_iowrite_handler(this, write_handler, 0x04D0, "PIIX3 PCI-to-ISA bridge", 1); DEV_register_iowrite_handler(this, write_handler, 0x04D1, "PIIX3 PCI-to-ISA bridge", 1); DEV_register_iowrite_handler(this, write_handler, 0x0CF9, "PIIX3 PCI-to-ISA bridge", 1); DEV_register_ioread_handler(this, read_handler, 0x00B2, "PIIX3 PCI-to-ISA bridge", 1); DEV_register_ioread_handler(this, read_handler, 0x00B3, "PIIX3 PCI-to-ISA bridge", 1); DEV_register_ioread_handler(this, read_handler, 0x04D0, "PIIX3 PCI-to-ISA bridge", 1); DEV_register_ioread_handler(this, read_handler, 0x04D1, "PIIX3 PCI-to-ISA bridge", 1); DEV_register_ioread_handler(this, read_handler, 0x0CF9, "PIIX3 PCI-to-ISA bridge", 1); for (i=0; i<256; i++) BX_P2I_THIS s.pci_conf[i] = 0x0; for (i=0; i<16; i++) BX_P2I_THIS s.irq_registry[i] = 0x0; for (i=0; i<16; i++) BX_P2I_THIS s.irq_level[i] = 0x0; // readonly registers BX_P2I_THIS s.pci_conf[0x00] = 0x86; BX_P2I_THIS s.pci_conf[0x01] = 0x80; BX_P2I_THIS s.pci_conf[0x02] = 0x00; BX_P2I_THIS s.pci_conf[0x03] = 0x70; BX_P2I_THIS s.pci_conf[0x04] = 0x07; BX_P2I_THIS s.pci_conf[0x0a] = 0x01; BX_P2I_THIS s.pci_conf[0x0b] = 0x06; BX_P2I_THIS s.pci_conf[0x0e] = 0x80; // irq routing registers BX_P2I_THIS s.pci_conf[0x60] = 0x80; BX_P2I_THIS s.pci_conf[0x61] = 0x80; BX_P2I_THIS s.pci_conf[0x62] = 0x80; BX_P2I_THIS s.pci_conf[0x63] = 0x80; } void bx_pci2isa_c::reset(unsigned type) { BX_P2I_THIS s.pci_conf[0x05] = 0x00; BX_P2I_THIS s.pci_conf[0x06] = 0x00; BX_P2I_THIS s.pci_conf[0x07] = 0x02; BX_P2I_THIS s.pci_conf[0x4c] = 0x4d; BX_P2I_THIS s.pci_conf[0x4e] = 0x03; BX_P2I_THIS s.pci_conf[0x4f] = 0x00; BX_P2I_THIS s.pci_conf[0x69] = 0x02; BX_P2I_THIS s.pci_conf[0x70] = 0x80; BX_P2I_THIS s.pci_conf[0x76] = 0x0c; BX_P2I_THIS s.pci_conf[0x77] = 0x0c; BX_P2I_THIS s.pci_conf[0x78] = 0x02; BX_P2I_THIS s.pci_conf[0x79] = 0x00; BX_P2I_THIS s.pci_conf[0x80] = 0x00; BX_P2I_THIS s.pci_conf[0x82] = 0x00; BX_P2I_THIS s.pci_conf[0xa0] = 0x08; BX_P2I_THIS s.pci_conf[0xa0] = 0x08; BX_P2I_THIS s.pci_conf[0xa2] = 0x00; BX_P2I_THIS s.pci_conf[0xa3] = 0x00; BX_P2I_THIS s.pci_conf[0xa4] = 0x00; BX_P2I_THIS s.pci_conf[0xa5] = 0x00; BX_P2I_THIS s.pci_conf[0xa6] = 0x00; BX_P2I_THIS s.pci_conf[0xa7] = 0x00; BX_P2I_THIS s.pci_conf[0xa8] = 0x0f; BX_P2I_THIS s.pci_conf[0xaa] = 0x00; BX_P2I_THIS s.pci_conf[0xab] = 0x00; BX_P2I_THIS s.pci_conf[0xac] = 0x00; BX_P2I_THIS s.pci_conf[0xae] = 0x00; for (unsigned i = 0; i < 4; i++) { pci_set_irq(0x08, i+1, 0); pci_unregister_irq(i); } BX_P2I_THIS s.elcr1 = 0x00; BX_P2I_THIS s.elcr2 = 0x00; BX_P2I_THIS s.pci_reset = 0x00; } void bx_pci2isa_c::pci_register_irq(unsigned pirq, unsigned irq) { if ((irq < 16) && (((1 << irq) & 0xdef8) > 0)) { if (BX_P2I_THIS s.pci_conf[0x60 + pirq] < 16) { pci_unregister_irq(pirq); } BX_P2I_THIS s.pci_conf[0x60 + pirq] = irq; if (!BX_P2I_THIS s.irq_registry[irq]) { DEV_register_irq(irq, "PIIX3 IRQ routing"); } BX_P2I_THIS s.irq_registry[irq] |= (1 << pirq); } } void bx_pci2isa_c::pci_unregister_irq(unsigned pirq) { Bit8u irq = BX_P2I_THIS s.pci_conf[0x60 + pirq]; if (irq < 16) { BX_P2I_THIS s.irq_registry[irq] &= ~(1 << pirq); if (!BX_P2I_THIS s.irq_registry[irq]) { BX_P2I_THIS pci_set_irq(0x08, pirq+1, 0); DEV_unregister_irq(irq, "PIIX3 IRQ routing"); } BX_P2I_THIS s.pci_conf[0x60 + pirq] = 0x80; } } void bx_pci2isa_c::pci_set_irq(Bit8u devfunc, unsigned line, bx_bool level) { Bit8u pirq = ((devfunc >> 3) + line - 2) & 0x03; Bit8u irq = BX_P2I_THIS s.pci_conf[0x60 + pirq]; if ((irq < 16) && (((1 << irq) & 0xdef8) > 0)) { if (level == 1) { if (!BX_P2I_THIS s.irq_level[irq]) { DEV_pic_raise_irq(irq); BX_DEBUG(("PIRQ%c -> IRQ %d = 1", pirq+65, irq)); } BX_P2I_THIS s.irq_level[irq] |= (1 << (devfunc >> 3)); } else { BX_P2I_THIS s.irq_level[irq] &= ~(1 << (devfunc >> 3)); if (!BX_P2I_THIS s.irq_level[irq]) { DEV_pic_lower_irq(irq); BX_DEBUG(("PIRQ%c -> IRQ %d = 0", pirq+65, irq)); } } } } // static IO port read callback handler // redirects to non-static class handler to avoid virtual functions Bit32u bx_pci2isa_c::read_handler(void *this_ptr, Bit32u address, unsigned io_len) { #if !BX_USE_P2I_SMF bx_pci2isa_c *class_ptr = (bx_pci2isa_c *) this_ptr; return class_ptr->read(address, io_len); } Bit32u bx_pci2isa_c::read(Bit32u address, unsigned io_len) { #else UNUSED(this_ptr); #endif // !BX_USE_P2I_SMF switch (address) { case 0x00b2: BX_ERROR(("read: APM command register not supported yet")); break; case 0x00b3: BX_ERROR(("read: APM status register not supported yet")); break; case 0x04d0: return(BX_P2I_THIS s.elcr1); break; case 0x04d1: return(BX_P2I_THIS s.elcr2); break; case 0x0cf9: return(BX_P2I_THIS s.pci_reset); break; } return(0xffffffff); } // static IO port write callback handler // redirects to non-static class handler to avoid virtual functions void bx_pci2isa_c::write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len) { #if !BX_USE_P2I_SMF bx_pci2isa_c *class_ptr = (bx_pci2isa_c *) this_ptr; class_ptr->write(address, value, io_len); } void bx_pci2isa_c::write(Bit32u address, Bit32u value, unsigned io_len) { #else UNUSED(this_ptr); #endif // !BX_USE_P2I_SMF switch (address) { case 0x00b2: BX_ERROR(("write: APM command register not supported yet")); break; case 0x00b3: BX_ERROR(("write: APM status register not supported yet")); break; case 0x04d0: value &= 0xf8; if (value != BX_P2I_THIS s.elcr1) { BX_P2I_THIS s.elcr1 = value; BX_INFO(("write: ELCR1 = 0x%02x", BX_P2I_THIS s.elcr1)); DEV_pic_set_mode(1, BX_P2I_THIS s.elcr1); // master PIC } break; case 0x04d1: value &= 0xde; if (value != BX_P2I_THIS s.elcr2) { BX_P2I_THIS s.elcr2 = value; BX_INFO(("write: ELCR2 = 0x%02x", BX_P2I_THIS s.elcr2)); DEV_pic_set_mode(0, BX_P2I_THIS s.elcr2); // slave PIC } break; case 0x0cf9: BX_INFO(("write: CPU reset register = 0x%02x", value)); BX_P2I_THIS s.pci_reset = value & 0x02; if (value & 0x04) { if (BX_P2I_THIS s.pci_reset) { bx_pc_system.Reset(BX_RESET_HARDWARE); } else { bx_pc_system.Reset(BX_RESET_SOFTWARE); } } break; } } // static pci configuration space read callback handler // redirects to non-static class handler to avoid virtual functions Bit32u bx_pci2isa_c::pci_read_handler(void *this_ptr, Bit8u address, unsigned io_len) { #if !BX_USE_P2I_SMF bx_pci2isa_c *class_ptr = (bx_pci2isa_c *) this_ptr; return class_ptr->pci_read(address, io_len); } Bit32u bx_pci2isa_c::pci_read(Bit8u address, unsigned io_len) { #else UNUSED(this_ptr); #endif // !BX_USE_P2I_SMF Bit32u value = 0; if (io_len <= 4) { for (unsigned i=0; ipci_write(address, value, io_len); } void bx_pci2isa_c::pci_write(Bit8u address, Bit32u value, unsigned io_len) { #else UNUSED(this_ptr); #endif // !BX_USE_P2I_SMF Bit8u value8; if ((address >= 0x10) && (address < 0x34)) return; if (io_len <= 4) { for (unsigned i=0; i> (i*8)) & 0xFF; switch (address+i) { case 0x04: case 0x06: break; case 0x60: case 0x61: case 0x62: case 0x63: if (value8 != BX_P2I_THIS s.pci_conf[address+i]) { if (value8 >= 0x80) { pci_unregister_irq((address+i) & 0x03); } else { pci_register_irq((address+i) & 0x03, value8); } BX_INFO(("PCI IRQ routing: PIRQ%c# set to 0x%02x", address+i-31, value8)); } break; default: BX_P2I_THIS s.pci_conf[address+i] = value8; BX_DEBUG(("PIIX3 PCI-to-ISA write register 0x%02x value 0x%02x", address+i, value8)); } } } } #endif /* BX_SUPPORT_PCI */