1 /* 2 * Copyright (C) 2016 SiFive 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation, version 2. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 */ 13 14 #ifndef __ASM_RISCV_PCI_H 15 #define __ASM_RISCV_PCI_H 16 17 #include <linux/types.h> 18 #include <linux/slab.h> 19 #include <linux/dma-mapping.h> 20 21 #include <asm/io.h> 22 23 #define PCIBIOS_MIN_IO 0 24 #define PCIBIOS_MIN_MEM 0 25 26 /* RISC-V shim does not initialize PCI bus */ 27 #define pcibios_assign_all_busses() 1 28 29 /* We do not have an IOMMU */ 30 #define PCI_DMA_BUS_IS_PHYS 1 31 32 extern int isa_dma_bridge_buggy; 33 34 #ifdef CONFIG_PCI 35 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) 36 { 37 /* no legacy IRQ on risc-v */ 38 return -ENODEV; 39 } 40 41 static inline int pci_proc_domain(struct pci_bus *bus) 42 { 43 /* always show the domain in /proc */ 44 return 1; 45 } 46 #endif /* CONFIG_PCI */ 47 48 #endif /* __ASM_PCI_H */ 49