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kconfig: Introduce HAVE_ARCH_IOMAP

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Introduce a new Kconfig option for architecture codes to control
whether it provides io{read,write}{8,16,32} I/O accessor functions.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2018-10-15 02:21:15 -07:00 committed by Simon Glass
parent 440d9a47f7
commit 2895c4b7d6
2 changed files with 10 additions and 0 deletions
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4
include/linux/io.h
View file

@ -7,6 +7,7 @@
#include <linux/types.h>
#include <asm/io.h>
#ifndef CONFIG_HAVE_ARCH_IOMAP
static inline u8 ioread8(const volatile void __iomem *addr)
{
return readb(addr);
@ -21,6 +22,7 @@ static inline u32 ioread32(const volatile void __iomem *addr)
{
return readl(addr);
}
#endif /* !CONFIG_HAVE_ARCH_IOMAP */
#ifdef CONFIG_64BIT
static inline u64 ioread64(const volatile void __iomem *addr)
@ -29,6 +31,7 @@ static inline u64 ioread64(const volatile void __iomem *addr)
}
#endif /* CONFIG_64BIT */
#ifndef CONFIG_HAVE_ARCH_IOMAP
static inline void iowrite8(u8 value, volatile void __iomem *addr)
{
writeb(value, addr);
@ -43,6 +46,7 @@ static inline void iowrite32(u32 value, volatile void __iomem *addr)
{
writel(value, addr);
}
#endif /* !CONFIG_HAVE_ARCH_IOMAP */
#ifdef CONFIG_64BIT
static inline void iowrite64(u64 value, volatile void __iomem *addr)

6
lib/Kconfig
View file

@ -21,6 +21,12 @@ config DYNAMIC_CRC_TABLE
Enable this option to calculate entries for CRC tables at runtime.
This can be helpful when reducing the size of the build image
config HAVE_ARCH_IOMAP
bool
help
Enable this option if architecture provides io{read,write}{8,16,32}
I/O accessor functions.
config HAVE_PRIVATE_LIBGCC
bool