arch/riscv/include/asm/pci.h

   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 */