virt_to_phys() returns the physical address given a virtual. In most cases this will just the input value as the vast majority of systems run in a 1:1 mode.
However in systems that are not running this way it should report the physical address or ~0 if no mapping exists for the given virtual address.
Signed-off-by: Kumar Gala galak@kernel.crashing.org --- include/asm-arm/io.h | 5 +++++ include/asm-avr32/io.h | 5 +++++ include/asm-blackfin/io.h | 5 +++++ include/asm-i386/io.h | 5 +++++ include/asm-m68k/io.h | 5 +++++ include/asm-microblaze/io.h | 5 +++++ include/asm-mips/io.h | 2 +- include/asm-nios/io.h | 5 +++++ include/asm-nios2/io.h | 5 +++++ include/asm-ppc/io.h | 5 +++++ include/asm-sh/io.h | 5 +++++ include/asm-sparc/io.h | 5 +++++ 12 files changed, 56 insertions(+), 1 deletions(-)
diff --git a/include/asm-arm/io.h b/include/asm-arm/io.h index f4ae307..fec3a7e 100644 --- a/include/asm-arm/io.h +++ b/include/asm-arm/io.h @@ -57,6 +57,11 @@ static inline void unmap_physmem(void *vaddr, unsigned long flags)
}
+static inline phys_addr_t virt_to_phys(void * vaddr) +{ + return (phys_addr_t)(vaddr); +} + /* * Generic virtual read/write. Note that we don't support half-word * read/writes. We define __arch_*[bl] here, and leave __arch_*w diff --git a/include/asm-avr32/io.h b/include/asm-avr32/io.h index 06e52b1..d22cd35 100644 --- a/include/asm-avr32/io.h +++ b/include/asm-avr32/io.h @@ -125,4 +125,9 @@ static inline void unmap_physmem(void *vaddr, unsigned long len)
}
+static inline phys_addr_t virt_to_phys(void * vaddr) +{ + return (phys_addr_t)(vaddr); +} + #endif /* __ASM_AVR32_IO_H */ diff --git a/include/asm-blackfin/io.h b/include/asm-blackfin/io.h index da58914..6806494 100644 --- a/include/asm-blackfin/io.h +++ b/include/asm-blackfin/io.h @@ -64,6 +64,11 @@ static inline void unmap_physmem(void *vaddr, unsigned long flags)
}
+static inline phys_addr_t virt_to_phys(void * vaddr) +{ + return (phys_addr_t)(vaddr); +} + /* * These are for ISA/PCI shared memory _only_ and should never be used * on any other type of memory, including Zorro memory. They are meant to diff --git a/include/asm-i386/io.h b/include/asm-i386/io.h index 2c57140..9b757d4 100644 --- a/include/asm-i386/io.h +++ b/include/asm-i386/io.h @@ -229,4 +229,9 @@ static inline void unmap_physmem(void *vaddr, unsigned long flags)
}
+static inline phys_addr_t virt_to_phys(void * vaddr) +{ + return (phys_addr_t)(vaddr); +} + #endif diff --git a/include/asm-m68k/io.h b/include/asm-m68k/io.h index 1fccc12..50ea087 100644 --- a/include/asm-m68k/io.h +++ b/include/asm-m68k/io.h @@ -251,4 +251,9 @@ static inline void unmap_physmem(void *vaddr, unsigned long flags)
}
+static inline phys_addr_t virt_to_phys(void * vaddr) +{ + return (phys_addr_t)(vaddr); +} + #endif /* __ASM_M68K_IO_H__ */ diff --git a/include/asm-microblaze/io.h b/include/asm-microblaze/io.h index 8804724..7e190d1 100644 --- a/include/asm-microblaze/io.h +++ b/include/asm-microblaze/io.h @@ -155,4 +155,9 @@ static inline void unmap_physmem(void *vaddr, unsigned long flags)
}
+static inline phys_addr_t virt_to_phys(void * vaddr) +{ + return (phys_addr_t)(vaddr); +} + #endif /* __MICROBLAZE_IO_H__ */ diff --git a/include/asm-mips/io.h b/include/asm-mips/io.h index 3a0f33f..031186d 100644 --- a/include/asm-mips/io.h +++ b/include/asm-mips/io.h @@ -118,7 +118,7 @@ static inline void set_io_port_base(unsigned long base) * Change virtual addresses to physical addresses and vv. * These are trivial on the 1:1 Linux/MIPS mapping */ -extern inline unsigned long virt_to_phys(volatile void * address) +extern inline phys_addr_t virt_to_phys(void * address) { return CPHYSADDR(address); } diff --git a/include/asm-nios/io.h b/include/asm-nios/io.h index 8b78806..899682c 100644 --- a/include/asm-nios/io.h +++ b/include/asm-nios/io.h @@ -133,4 +133,9 @@ static inline void unmap_physmem(void *vaddr, unsigned long flags)
}
+static inline phys_addr_t virt_to_phys(void * vaddr) +{ + return (phys_addr_t)(vaddr); +} + #endif /* __ASM_NIOS_IO_H_ */ diff --git a/include/asm-nios2/io.h b/include/asm-nios2/io.h index 2f1ec26..01d11ef 100644 --- a/include/asm-nios2/io.h +++ b/include/asm-nios2/io.h @@ -53,6 +53,11 @@ static inline void unmap_physmem(void *vaddr, unsigned long flags)
}
+static inline phys_addr_t virt_to_phys(void * vaddr) +{ + return (phys_addr_t)(vaddr); +} + extern unsigned char inb (unsigned char *port); extern unsigned short inw (unsigned short *port); extern unsigned inl (unsigned port); diff --git a/include/asm-ppc/io.h b/include/asm-ppc/io.h index c349681..c00de45 100644 --- a/include/asm-ppc/io.h +++ b/include/asm-ppc/io.h @@ -298,4 +298,9 @@ static inline void unmap_physmem(void *vaddr, unsigned long flags)
}
+static inline phys_addr_t virt_to_phys(void * vaddr) +{ + return (phys_addr_t)(vaddr); +} + #endif diff --git a/include/asm-sh/io.h b/include/asm-sh/io.h index adc3f81..ca598a6 100644 --- a/include/asm-sh/io.h +++ b/include/asm-sh/io.h @@ -261,5 +261,10 @@ static inline void unmap_physmem(void *vaddr, unsigned long flags)
}
+static inline phys_addr_t virt_to_phys(void * vaddr) +{ + return (phys_addr_t)(vaddr); +} + #endif /* __KERNEL__ */ #endif /* __ASM_SH_IO_H */ diff --git a/include/asm-sparc/io.h b/include/asm-sparc/io.h index 5f8d05c..0c5d86c 100644 --- a/include/asm-sparc/io.h +++ b/include/asm-sparc/io.h @@ -90,4 +90,9 @@ static inline void unmap_physmem(void *vaddr, unsigned long flags)
}
+static inline phys_addr_t virt_to_phys(void * vaddr) +{ + return (phys_addr_t)(vaddr); +} + #endif