diff options
Diffstat (limited to 'arch/arm64/include/asm/io.h')
| -rw-r--r-- | arch/arm64/include/asm/io.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h index 0c00c87bb9dd..35b2e50f17fb 100644 --- a/arch/arm64/include/asm/io.h +++ b/arch/arm64/include/asm/io.h @@ -173,6 +173,16 @@ extern void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size); #define iounmap __iounmap /* + * PCI configuration space mapping function. + * + * The PCI specification disallows posted write configuration transactions. + * Add an arch specific pci_remap_cfgspace() definition that is implemented + * through nGnRnE device memory attribute as recommended by the ARM v8 + * Architecture reference manual Issue A.k B2.8.2 "Device memory". + */ +#define pci_remap_cfgspace(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRnE)) + +/* * io{read,write}{16,32,64}be() macros */ #define ioread16be(p) ({ __u16 __v = be16_to_cpu((__force __be16)__raw_readw(p)); __iormb(); __v; }) |