added PCI code in anticipation of porting the S3 driver

[dosdemo] / src / dos / pci.h

diff --git a/src/dos/pci.h b/src/dos/pci.h
new file mode 100644 (file)
index 0000000..6025831
--- /dev/null
+++ b/src/dos/pci.h
@@ -0,0 +1,53 @@
+/*
+S3 Virge driver hack
+Copyright (C) 2021 John Tsiombikas <nuclear@member.fsf.org>
+
+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 3 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, see <https://www.gnu.org/licenses/>.
+*/
+#ifndef PCI_H_
+#define PCI_H_
+
+#include "inttypes.h"
+#include "util.h"
+
+#pragma pack (push, 1)
+struct pci_config_data {
+       uint16_t vendor, device;
+       uint16_t cmd, status;
+       uint8_t rev, iface, subclass, class;
+       uint8_t cacheline_size;
+       uint8_t latency_timer;
+       uint8_t hdr_type;
+       uint8_t bist;
+       uint32_t base_addr[6];
+       uint32_t cardbus_cis;
+       uint16_t subsys_vendor;
+       uint16_t subsys;
+       uint32_t rom_addr;
+       uint32_t reserved1, reserved2;
+       uint8_t intr_line, intr_pin;
+       uint8_t min_grant, max_latency;
+} PACKED;
+#pragma pop (push)
+
+struct pci_device {
+       int bus, dev, func;
+       struct pci_config_data cfg;
+};
+
+int init_pci(void);
+
+struct pci_device *find_pci_dev(uint16_t vendorid, uint16_t devid);
+
+#endif /* PCI_H_ */