From f031ad404e544c9332498a11d9956b27a4acc72b Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Tue, 9 Jul 2024 01:36:59 -0400 Subject: kernel: Add PCI driver Signed-off-by: Ian Moffett --- sys/arch/amd64/pci/pci_machdep.c | 63 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 sys/arch/amd64/pci/pci_machdep.c (limited to 'sys/arch') diff --git a/sys/arch/amd64/pci/pci_machdep.c b/sys/arch/amd64/pci/pci_machdep.c new file mode 100644 index 0000000..fa6e492 --- /dev/null +++ b/sys/arch/amd64/pci/pci_machdep.c @@ -0,0 +1,63 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * 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 Hyra 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. + */ + +#include +#include +#include +#include + +static inline uint32_t +pci_conf_addr(struct pci_device *dev, uint32_t offset) +{ + return BIT(31) | + (offset & ~3) | + (dev->func << 8) | + (dev->slot << 11) | + (dev->bus << 16); +} + +pcireg_t +pci_readl(struct pci_device *dev, uint32_t offset) +{ + uint32_t address; + + address = pci_conf_addr(dev, offset); + outl(0xCF8, address); + return inl(0xCFC) >> ((offset & 3) * 8); +} + +void +pci_writel(struct pci_device *dev, uint32_t offset, pcireg_t val) +{ + uint32_t address; + + address = pci_conf_addr(dev, offset); + outl(0xCF8, address); + outl(0xCFC, val); +} -- cgit v1.2.3