diff options
| author | MaJun <majun258@linux.alibaba.com> | 2020-01-27 03:56:21 +0100 |
|---|---|---|
| committer | Guo Ren <guoren@linux.alibaba.com> | 2020-02-21 08:43:25 +0100 |
| commit | 5b49c82dadfe0f3741778f57385f964ec1514863 (patch) | |
| tree | 638078189f9c04cd55b7657be9f038d6e053165f /arch/csky/include/asm/pci.h | |
| parent | csky: Minimize defconfig to support buildroot config.fragment (diff) | |
| download | linux-5b49c82dadfe0f3741778f57385f964ec1514863.tar.xz linux-5b49c82dadfe0f3741778f57385f964ec1514863.zip | |
csky: Add PCI support
Add the pci related code for csky arch to support basic pci virtual
function, such as qemu virt-pci-9pfs.
Signed-off-by: MaJun <majun258@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Diffstat (limited to 'arch/csky/include/asm/pci.h')
| -rw-r--r-- | arch/csky/include/asm/pci.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/csky/include/asm/pci.h b/arch/csky/include/asm/pci.h new file mode 100644 index 000000000000..ebc765b1f78b --- /dev/null +++ b/arch/csky/include/asm/pci.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef __ASM_CSKY_PCI_H +#define __ASM_CSKY_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 + +/* C-SKY shim does not initialize PCI bus */ +#define pcibios_assign_all_busses() 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 csky */ + 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_CSKY_PCI_H */ |