From 89b99f6342d7a4ec2629850b06dc91a2864681bc Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Thu, 18 Sep 2025 13:21:27 -0400 Subject: kern: io: Add initial PCI CAM driver Signed-off-by: Ian Moffett --- src/sys/include/io/pci/pci.h | 80 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 src/sys/include/io/pci/pci.h (limited to 'src/sys/include/io/pci/pci.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..a636ce7 --- /dev/null +++ b/src/sys/include/io/pci/pci.h @@ -0,0 +1,80 @@ +/* + * 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_PCI_H_ +#define _PCI_PCI_H_ 1 + +#include + +/* PCI specific types */ +typedef uint32_t pcireg_t; +typedef uint32_t pcival_t; + +/* + * Represents a device attached to the PCI + * bus + * + * @bus: Bus number of device + * @slot: Slot number of device + * @func: Function number of device + */ +struct pci_device { + uint16_t bus; + uint8_t slot; + uint8_t func; +}; + +/* + * Read from a specific register on a specific PCI + * enabled device. + * + * @dp: Device to read from + * @reg: Offset of desired register + * + * Returns the 32-bit register value on success + */ +pcireg_t pci_readl(struct pci_device *dp, pcireg_t reg); + +/* + * Write a value to a specific register on a specific + * PCI enabled device. + * + * @dp: Device to write to + * @reg: Offset of the desired register + * @v: 32-bit value to be written + */ +void pci_writel(struct pci_device *dp, pcireg_t reg, pcival_t v); + +/* + * Initialize the root bus and enumerate attached + * devices. + */ +void pci_init_bus(void); + +#endif /* !PCI_PCI_H_ */ -- cgit v1.2.3