The arm, riscv, sandbox and x86 architectures use
just the same phys_to_virt()/virt_to_phys() implementation.
Only the mips architecture has its own special implementation.
So we can move phys_to_virt() and virt_to_phys()
generic implementation to include/asm-generic/io.h.
Use override functions way introduced in the 9216efafc52ff99e
("asm-generic/io.h: Reconcile I/O accessor overrides")
linux kernel commit.
Signed-off-by: Antony Pavlov <antonynpavlov@xxxxxxxxx>
---
arch/arm/include/asm/io.h | 10 ----------
arch/mips/include/asm/io.h | 2 ++
arch/riscv/include/asm/io.h | 10 ----------
arch/sandbox/include/asm/io.h | 10 ----------
arch/x86/include/asm/io.h | 10 ----------
include/asm-generic/io.h | 20 ++++++++++++++++++++
6 files changed, 22 insertions(+), 40 deletions(-)
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
index 1c0f522d1d4..486b1429502 100644
--- a/arch/arm/include/asm/io.h
+++ b/arch/arm/include/asm/io.h
@@ -18,14 +18,4 @@ extern void memcpy_fromio(void *, const volatile void __iomem *, size_t);
extern void memcpy_toio(volatile void __iomem *, const void *, size_t);
extern void memset_io(volatile void __iomem *, int, size_t);
-static inline void *phys_to_virt(unsigned long phys)
-{
- return (void *)phys;
-}
-
-static inline unsigned long virt_to_phys(volatile void *mem)
-{
- return (unsigned long)mem;
-}
-
#endif /* __ASM_ARM_IO_H */
diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h
index 0d228aa0f51..a3acbd7017c 100644
--- a/arch/mips/include/asm/io.h
+++ b/arch/mips/include/asm/io.h
@@ -27,6 +27,7 @@ void dma_inv_range(unsigned long, unsigned long);
* The returned physical address is the physical (CPU) mapping for
* the memory address given.
*/
+#define virt_to_phys virt_to_phys
static inline unsigned long virt_to_phys(const void *address)
{
return (unsigned long)CPHYSADDR(address);
@@ -39,6 +40,7 @@ static inline unsigned long virt_to_phys(const void *address)
* The returned virtual address is a current CPU mapping for
* the memory address given.
*/
+#define phys_to_virt phys_to_virt
static inline void *phys_to_virt(unsigned long address)
{
if (IS_ENABLED(CONFIG_MMU)) {
diff --git a/arch/riscv/include/asm/io.h b/arch/riscv/include/asm/io.h
index 978f6443407..76d66c0a3b8 100644
--- a/arch/riscv/include/asm/io.h
+++ b/arch/riscv/include/asm/io.h
@@ -7,14 +7,4 @@
#include <asm-generic/io.h>
-static inline void *phys_to_virt(unsigned long phys)
-{
- return (void *)phys;
-}
-
-static inline unsigned long virt_to_phys(volatile void *mem)
-{
- return (unsigned long)mem;
-}
-
#endif /* __ASM_RISCV_IO_H */
diff --git a/arch/sandbox/include/asm/io.h b/arch/sandbox/include/asm/io.h
index 71cf50cd9a0..eec279b8883 100644
--- a/arch/sandbox/include/asm/io.h
+++ b/arch/sandbox/include/asm/io.h
@@ -11,14 +11,4 @@ extern unsigned char __pci_iobase[IO_SPACE_LIMIT];
#include <asm-generic/io.h>
-static inline void *phys_to_virt(unsigned long phys)
-{
- return (void *)phys;
-}
-
-static inline unsigned long virt_to_phys(volatile void *mem)
-{
- return (unsigned long)mem;
-}
-
#endif /* __ASM_SANDBOX_IO_H */
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 41c5cb3c14f..d4b5c269190 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -84,16 +84,6 @@ static inline void io_delay(void)
inb(0x80);
}
-static inline void *phys_to_virt(unsigned long phys)
-{
- return (void *)phys;
-}
-
-static inline unsigned long virt_to_phys(volatile void *mem)
-{
- return (unsigned long)mem;
-}
-
#include <asm-generic/io.h>
#endif /* __ASM_X86_IO_H */
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index 47f8c3ec1be..e41b4df4036 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -421,6 +421,26 @@ static inline void iowrite64be(u64 value, volatile void __iomem *addr)
#endif
#endif /* CONFIG_64BIT */
+/*
+ * Change virtual addresses to physical addresses and vv.
+ * These are pretty trivial
+ */
+#ifndef virt_to_phys
+#define virt_to_phys virt_to_phys
+static inline unsigned long virt_to_phys(volatile void *mem)
+{
+ return (unsigned long)mem;
+}
+#endif
+
+#ifndef phys_to_virt
+#define phys_to_virt phys_to_virt
+static inline void *phys_to_virt(unsigned long phys)
+{
+ return (void *)phys;
+}
+#endif
+
#ifndef IOMEM
#define IOMEM(addr) ((void __force __iomem *)(addr))
#endif
--
2.36.1
