RISC-V: Device, timer, IRQs, and the SBI

[linux-2.6-microblaze.git] / arch / riscv / include / asm / pci.h

diff --git a/arch/riscv/include/asm/pci.h b/arch/riscv/include/asm/pci.h
new file mode 100644 (file)
index 0000000..0f2fc9e
--- /dev/null
+++ b/arch/riscv/include/asm/pci.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2016 SiFive
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ */
+
+#ifndef __ASM_RISCV_PCI_H
+#define __ASM_RISCV_PCI_H
+
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/io.h>
+
+#define PCIBIOS_MIN_IO         0
+#define PCIBIOS_MIN_MEM                0
+
+/* RISC-V shim does not initialize PCI bus */
+#define pcibios_assign_all_busses() 1
+
+/* We do not have an IOMMU */
+#define PCI_DMA_BUS_IS_PHYS 1
+
+extern int isa_dma_bridge_buggy;
+
+#ifdef CONFIG_PCI
+static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
+{
+       /* no legacy IRQ on risc-v */
+       return -ENODEV;
+}
+
+static inline int pci_proc_domain(struct pci_bus *bus)
+{
+       /* always show the domain in /proc */
+       return 1;
+}
+#endif  /* CONFIG_PCI */
+
+#endif  /* __ASM_PCI_H */