///////////////////////////////////////////////////////////////////////// // $Id: pcivga.cc,v 1.4 2004-06-19 15:20:13 sshwarts Exp $ ///////////////////////////////////////////////////////////////////////// // // Copyright (C) 2002,2003 Mike Nordell // // 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 // // Experimental PCI VGA adapter // // Note: This "driver" was created for the SOLE PURPOSE of getting BeOS // to boot. It currently does NOTHING more than presenting a generic VGA // device on the PCI bus. ALL gfx in/out-put is still handled by the VGA code. // Furthermore, almost all of the PCI registers are currently acting like RAM. // 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_PCI_SUPPORT && BX_PCI_VGA_SUPPORT #define LOG_THIS thePciVgaAdapter-> bx_pcivga_c* thePciVgaAdapter = 0; int libpcivga_LTX_plugin_init(plugin_t *plugin, plugintype_t type, int argc, char *argv[]) { thePciVgaAdapter = new bx_pcivga_c (); bx_devices.pluginPciVgaAdapter = thePciVgaAdapter; BX_REGISTER_DEVICE_DEVMODEL(plugin, type, thePciVgaAdapter, BX_PLUGIN_PCIVGA); return 0; // Success } void libpcivga_LTX_plugin_fini(void) { } bx_pcivga_c::bx_pcivga_c(void) { put("PCIVGA"); settype(PCIVGALOG); } bx_pcivga_c::~bx_pcivga_c(void) { // nothing for now BX_DEBUG(("Exit.")); } void bx_pcivga_c::init(void) { // called once when bochs initializes DEV_register_pci_handlers(this, pci_read_handler, pci_write_handler, BX_PCI_DEVICE(2,0), "Experimental PCI VGA"); for (unsigned i=0; i<256; i++) { BX_PCIVGA_THIS s.pci_conf[i] = 0x0; } // readonly registers static const struct init_vals_t { unsigned addr; unsigned char val; } init_vals[] = { // Note that the values for vendor and device id are selected at random! // There might actually be "real" values for "experimental" vendor and // device that should be used! { 0x00, 0x34 }, { 0x01, 0x12 }, // 0x1234 - experimental vendor { 0x02, 0x11 }, { 0x03, 0x11 }, // 0x1111 - experimental device { 0x0a, 0x00 }, // class_sub VGA controller { 0x0b, 0x03 }, // class_base display { 0x0e, 0x00 } // header_type_generic }; for (unsigned i = 0; i < sizeof(init_vals) / sizeof(*init_vals); ++i) { BX_PCIVGA_THIS s.pci_conf[init_vals[i].addr] = init_vals[i].val; } } void bx_pcivga_c::reset(unsigned type) { static const struct reset_vals_t { unsigned addr; unsigned char val; } reset_vals[] = { { 0x04, 0x03 }, { 0x05, 0x00 }, // command_io + command_mem { 0x06, 0x00 }, { 0x07, 0x02 } // status_devsel_medium }; for (unsigned i = 0; i < sizeof(reset_vals) / sizeof(*reset_vals); ++i) { BX_PCIVGA_THIS s.pci_conf[reset_vals[i].addr] = reset_vals[i].val; } } // static pci configuration space read callback handler // redirects to non-static class handler to avoid virtual functions Bit32u bx_pcivga_c::pci_read_handler(void *this_ptr, Bit8u address, unsigned io_len) { #if !BX_USE_PCIVGA_SMF bx_pcivga_c *class_ptr = (bx_pcivga_c *) this_ptr; return class_ptr->pci_read(address, io_len); } Bit32u bx_pcivga_c::pci_read(Bit8u address, unsigned io_len) { #else UNUSED(this_ptr); #endif // !BX_USE_PCIVGA_SMF Bit32u value = 0; if (io_len > 4 || io_len == 0) { BX_DEBUG(("Experimental PCIVGA read register 0x%02x, len=%u !", (unsigned) address, (unsigned) io_len)); return 0xffffffff; } const char* pszName = " "; switch (address) { case 0x00: if (io_len == 2) { pszName = "(vendor id) "; } else if (io_len == 4) { pszName = "(vendor + device) "; } break; case 0x04: if (io_len == 2) { pszName = "(command) "; } else if (io_len == 4) { pszName = "(command+status) "; } break; case 0x08: if (io_len == 1) { pszName = "(revision id) "; } else if (io_len == 4) { pszName = "(rev.+class code) "; } break; case 0x0c: pszName = "(cache line size) "; break; case 0x28: pszName = "(cardbus cis) "; break; case 0x2c: pszName = "(subsys. vendor+) "; break; case 0x30: pszName = "(rom base) "; break; case 0x3c: pszName = "(interrupt line+) "; break; case 0x3d: pszName = "(interrupt pin) "; break; } // This odd code is to display only what bytes actually were read. char szTmp[9]; char szTmp2[3]; szTmp[0] = '\0'; szTmp2[0] = '\0'; for (unsigned i=0; ipci_write(address, value, io_len); } void bx_pcivga_c::pci_write(Bit8u address, Bit32u value, unsigned io_len) { #else UNUSED(this_ptr); #endif // !BX_USE_PCIVGA_SMF if (io_len > 4 || io_len == 0) { BX_DEBUG(("Experimental PCIVGA write register 0x%02x, len=%u !", (unsigned) address, (unsigned) io_len)); return; } // This odd code is to display only what bytes actually were written. char szTmp[9]; char szTmp2[3]; szTmp[0] = '\0'; szTmp2[0] = '\0'; for (unsigned i=0; i> (i*8)) & 0xFF; switch (address+i) { case 0x30: // Oh, no, you're not writing to rom_base! case 0x31: // case 0x32: // case 0x33: // case 0x04: // disallowing write to command case 0x06: // disallowing write to status lo-byte (is that expected?) strcpy(szTmp2, ".."); break; default: BX_PCIVGA_THIS s.pci_conf[address+i] = value8; sprintf(szTmp2, "%02x", value8); } strrev(szTmp2); strcat(szTmp, szTmp2); } strrev(szTmp); BX_DEBUG(("Experimental PCIVGA write register 0x%02x value 0x%s", address, szTmp)); } #endif // BX_PCI_SUPPORT && BX_PCI_VGA_SUPPORT