diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-x86/io.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/asm-x86/io.h b/include/asm-x86/io.h index c63563df4ac..bf5d629b3a3 100644 --- a/include/asm-x86/io.h +++ b/include/asm-x86/io.h @@ -5,6 +5,20 @@ #include <linux/compiler.h> +/* + * early_ioremap() and early_iounmap() are for temporary early boot-time + * mappings, before the real ioremap() is functional. + * A boot-time mapping is currently limited to at most 16 pages. + */ +#ifndef __ASSEMBLY__ +extern void early_ioremap_init(void); +extern void early_ioremap_clear(void); +extern void early_ioremap_reset(void); +extern void *early_ioremap(unsigned long offset, unsigned long size); +extern void early_iounmap(void *addr, unsigned long size); +extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys); +#endif + #define build_mmio_read(name, size, type, reg, barrier) \ static inline type name(const volatile void __iomem *addr) \ { type ret; asm volatile("mov" size " %1,%0":"=" reg (ret) \ |