scanning pci bus

[zos] / pci / pci.h

diff --git a/pci/pci.h b/pci/pci.h
new file mode 100644 (file)
index 0000000..300aa2a
--- /dev/null
+++ b/pci/pci.h
@@ -0,0 +1,116 @@
+#ifndef PCI_H_
+#define PCI_H_ 1
+
+char *pci_func_desc(uint8_t class, uint8_t sub, uint8_t prog);
+void pci_write_config(uint32_t base, uint8_t offset, uint32_t val);
+uint32_t pci_read_config(uint32_t base, uint8_t offset);
+
+struct pci_header {
+       uint16_t vendorid;
+       uint16_t deviceid;
+       uint16_t command;
+       uint16_t status;
+       uint8_t  revisionid;
+       uint8_t  progif;
+       uint8_t  subclass;
+       uint8_t  classcode;
+       uint8_t  cachelinesize;
+       uint8_t  latencytimer;
+       uint8_t  headertype;
+       uint8_t  bist;
+};
+
+/* header type 0x00 */
+struct pci_general {
+       struct pci_header header;
+       uint32_t bar0;
+       uint32_t bar1;
+       uint32_t bar2;
+       uint32_t bar3;
+       uint32_t bar4;
+       uint32_t bar5;
+       uint32_t cardbuscispointer;
+       uint16_t subsystemvendorid;
+       uint16_t subsystemid;
+       uint32_t expansionrombaseaddress;
+       uint32_t capabilities_pointer; /* only low 8 bits, remainder reserved */
+       uint32_t reserved38;
+       uint8_t  interrupt_line;
+       uint8_t  interrupt_pin;
+       uint8_t  mingrant;
+       uint8_t  maxlatency;
+};
+
+/* header type 0x01 */
+struct pci_bridge {
+       struct pci_header header;
+       uint32_t bar0;
+       uint32_t bar1;
+       uint8_t  primary_bus_number;
+       uint8_t  secondary_bus_number;
+       uint8_t  subordinate_bus_number;
+       uint8_t  secondary_latency_timer;
+       uint8_t  iobase;
+       uint8_t  iolimit;
+       uint16_t secondary_status;
+       uint16_t memory_base;
+       uint16_t memory_limit;
+       uint16_t prefetchable_memory_base;
+       uint16_t prefetchable_memory_limit;
+       uint8_t  iobase_upper;
+       uint8_t  iolimit_upper;
+       uint32_t capabilities_pointer; /* only low 8 bits, remainder reserved */
+       uint32_t expansion_rom;
+       uint8_t  interrupt_line;
+       uint8_t  interrupt_pin;
+       uint16_t bridge_control;
+};
+
+/* header type 0x02 */
+struct pci_cardbus {
+       struct pci_header header;
+       uint32_t cardbussocket;
+       uint8_t  capoffset;
+       uint8_t  reserved;
+       uint16_t secondary_status;
+       uint8_t  pci_bus;
+       uint8_t  cardbus_bus;
+       uint8_t  subordinate_bus_number;
+       uint8_t  cardbus_latency_timer;
+       uint32_t memory_base0;
+       uint32_t memory_limit0;
+       uint32_t memory_base1;
+       uint32_t memory_limit1;
+       uint32_t io_base0;
+       uint32_t io_limit0;
+       uint32_t io_base1;
+       uint32_t io_limit1;
+       uint8_t  interrupt_line;
+       uint8_t  interrupt_pin;
+       uint16_t bridge_control;
+       uint16_t subsystem_device;
+       uint16_t subsystem_vendor;
+       uint32_t pccard16bitaddr;
+};
+
+union pci_device {
+       struct pci_header header;
+       struct pci_general general;
+       struct pci_bridge bridge;
+       struct pci_cardbus cardbus;
+};
+
+struct pci_info {
+       union pci_device device;
+       struct pci_info *next;
+       struct pci_info *prev;
+       uint32_t base; /* base address of pci io registers */
+       size_t bar_size[6];
+       void *bar_addr[6];
+};
+
+extern struct pci_info *pci_devices;
+
+void pci_init();
+
+#endif