pci: Split low-level pci code from higher-level 'struct pci_device' code

Split pci.c into pci.c and pcidevice.c.  The low-level code that
interacts directly with the PCI devices remains in pci.c, while
functions dealing with the higher level pci_device cache move to
pcidevice.c.  Only pci.c is needed in 16bit mode.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 77 insertions, 0 deletions

diff --git a/src/hw/pcidevice.h b/src/hw/pcidevice.h
new file mode 100644
index 00000000..354b5493
--- /dev/null
+++ b/src/hw/pcidevice.h
@@ -0,0 +1,77 @@
+#ifndef __PCIDEVICE_H
+#define __PCIDEVICE_H
+
+#include "types.h" // u32
+#include "list.h" // hlist_node
+
+struct pci_device {
+    u16 bdf;
+    u8 rootbus;
+    struct hlist_node node;
+    struct pci_device *parent;
+
+    // Configuration space device information
+    u16 vendor, device;
+    u16 class;
+    u8 prog_if, revision;
+    u8 header_type;
+    u8 secondary_bus;
+
+    // Local information on device.
+    int have_driver;
+};
+extern struct hlist_head PCIDevices;
+extern int MaxPCIBus;
+
+static inline u32 pci_classprog(struct pci_device *pci) {
+    return (pci->class << 8) | pci->prog_if;
+}
+
+#define foreachpci(PCI)                                 \
+    hlist_for_each_entry(PCI, &PCIDevices, node)
+
+#define PCI_ANY_ID      (~0)
+struct pci_device_id {
+    u32 vendid;
+    u32 devid;
+    u32 class;
+    u32 class_mask;
+    void (*func)(struct pci_device *pci, void *arg);
+};
+
+#define PCI_DEVICE(vendor_id, device_id, init_func)     \
+    {                                                   \
+        .vendid = (vendor_id),                          \
+        .devid = (device_id),                           \
+        .class = PCI_ANY_ID,                            \
+        .class_mask = 0,                                \
+        .func = (init_func)                             \
+    }
+
+#define PCI_DEVICE_CLASS(vendor_id, device_id, class_code, init_func)   \
+    {                                                                   \
+        .vendid = (vendor_id),                                          \
+        .devid = (device_id),                                           \
+        .class = (class_code),                                          \
+        .class_mask = ~0,                                               \
+        .func = (init_func)                                             \
+    }
+
+#define PCI_DEVICE_END                          \
+    {                                           \
+        .vendid = 0,                            \
+    }
+
+void pci_probe_devices(void);
+struct pci_device *pci_find_device(u16 vendid, u16 devid);
+struct pci_device *pci_find_class(u16 classid);
+int pci_init_device(const struct pci_device_id *ids
+                    , struct pci_device *pci, void *arg);
+struct pci_device *pci_find_init_device(const struct pci_device_id *ids
+                                        , void *arg);
+u8 pci_find_capability(struct pci_device *pci, u8 cap_id, u8 cap);
+void pci_enable_busmaster(struct pci_device *pci);
+u16 pci_enable_iobar(struct pci_device *pci, u32 addr);
+void *pci_enable_membar(struct pci_device *pci, u32 addr);
+
+#endif // pcidevice.h