From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l71Y6-0004VD-CU for barebox@lists.infradead.org; Tue, 02 Feb 2021 19:41:19 +0000 From: Ahmad Fatoum Date: Tue, 2 Feb 2021 20:40:55 +0100 Message-Id: <20210202194059.9466-3-a.fatoum@pengutronix.de> In-Reply-To: <20210202194059.9466-1-a.fatoum@pengutronix.de> References: <20210202194059.9466-1-a.fatoum@pengutronix.de> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 3/7] asm-generic: define fallback memcpy and memset for device I/O To: barebox@lists.infradead.org Cc: Ahmad Fatoum The Atmel quadspi driver makes use of the memcpy_(to|from)io, but we don't define them on all platforms. Fix this to allow for easier porting of kernel code. Signed-off-by: Ahmad Fatoum --- v1 -> v2: - squash commit in v1 series that changed same file (Sascha) --- include/asm-generic/io.h | 55 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h index 76e6d0dc1112..a4b0dc4b4337 100644 --- a/include/asm-generic/io.h +++ b/include/asm-generic/io.h @@ -11,6 +11,7 @@ #ifndef __ASM_GENERIC_IO_H #define __ASM_GENERIC_IO_H +#include /* for memset() and memcpy() */ #include #include @@ -424,4 +425,58 @@ static inline void iowrite64be(u64 value, volatile void __iomem *addr) #define IOMEM(addr) ((void __force __iomem *)(addr)) #endif +#define __io_virt(x) ((void __force *)(x)) + +#ifndef memset_io +#define memset_io memset_io +/** + * memset_io Set a range of I/O memory to a constant value + * @addr: The beginning of the I/O-memory range to set + * @val: The value to set the memory to + * @count: The number of bytes to set + * + * Set a range of I/O memory to a given value. + */ +static inline void memset_io(volatile void __iomem *addr, int value, + size_t size) +{ + memset(__io_virt(addr), value, size); +} +#endif + +#ifndef memcpy_fromio +#define memcpy_fromio memcpy_fromio +/** + * memcpy_fromio Copy a block of data from I/O memory + * @dst: The (RAM) destination for the copy + * @src: The (I/O memory) source for the data + * @count: The number of bytes to copy + * + * Copy a block of data from I/O memory. + */ +static inline void memcpy_fromio(void *buffer, + const volatile void __iomem *addr, + size_t size) +{ + memcpy(buffer, __io_virt(addr), size); +} +#endif + +#ifndef memcpy_toio +#define memcpy_toio memcpy_toio +/** + * memcpy_toio Copy a block of data into I/O memory + * @dst: The (I/O memory) destination for the copy + * @src: The (RAM) source for the data + * @count: The number of bytes to copy + * + * Copy a block of data to I/O memory. + */ +static inline void memcpy_toio(volatile void __iomem *addr, const void *buffer, + size_t size) +{ + memcpy(__io_virt(addr), buffer, size); +} +#endif + #endif /* __ASM_GENERIC_IO_H */ -- 2.30.0 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox