2 files changed, 118 insertions, 0 deletions
diff --git a/src/sys/include/io/pci/cam.h b/src/sys/include/io/pci/cam.h
new file mode 100644
index 0000000..198e8df
--- /dev/null
+++ b/src/sys/include/io/pci/cam.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _PCI_CAM_H_
+#define _PCI_CAM_H_ 1
+
+#include <sys/types.h>
+#include <io/pci/pci.h>
+
+/*
+ * Configuration Access Mechanism hooks for the
+ * L5 PCI driver.
+ *
+ * Contains read/write hooks:
+ * [
+ *      @dp: Device pointer
+ *      @off: Register offset
+ *      @v[writel]: Value to write
+ * ]
+ */
+struct cam_hook {
+    void(*cam_writel)(struct pci_device *dp, uint32_t off, pcireg_t v);
+    pcireg_t(*cam_readl)(struct pci_device *dp, uint32_t off);
+};
+
+/*
+ * Initialize configuration access mechanism hooks
+ * to be used for PCI device access.
+ *
+ * @chp: (E)CAM hooks
+ *
+ * Returns zero on success, otherwise a less than zero
+ * value to indicate failure.
+ */
+int pci_cam_init(struct cam_hook *chp);
+
+#endif  /* !_PCI_CAM_H_ */
diff --git a/src/sys/include/io/pci/pci.h b/src/sys/include/io/pci/pci.h
new file mode 100644
index 0000000..6306e0c
--- /dev/null
+++ b/src/sys/include/io/pci/pci.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _IO_PCI_H_
+#define _IO_PCI_H_ 1
+
+#include <sys/types.h>
+
+/* PCI register / value types */
+typedef uint32_t pcireg_t;
+typedef uint32_t pcival_t;
+
+/*
+ * Represents a single device attached to the
+ * PCI bus.
+ */
+struct pci_device {
+    uint16_t bus;
+    uint8_t slot;
+    uint8_t func;
+};
+
+/*
+ * Initialize the PCI bus and enumerate attached
+ * devices.
+ */
+void pci_init_bus(void);
+
+#endif  /* !_IO_PCI_H_ */