From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-lb0-x22e.google.com ([2a00:1450:4010:c04::22e]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WZxxn-0002tO-70 for barebox@lists.infradead.org; Tue, 15 Apr 2014 07:39:27 +0000 Received: by mail-lb0-f174.google.com with SMTP id u14so6484479lbd.5 for ; Tue, 15 Apr 2014 00:39:04 -0700 (PDT) From: Antony Pavlov Date: Tue, 15 Apr 2014 11:38:28 +0400 Message-Id: <1397547514-19925-5-git-send-email-antonynpavlov@gmail.com> In-Reply-To: <1397547514-19925-1-git-send-email-antonynpavlov@gmail.com> References: <1397547514-19925-1-git-send-email-antonynpavlov@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 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: [RFC 04/10] MIPS: add virt_to_phys() and phys_to_virt() To: barebox@lists.infradead.org Signed-off-by: Antony Pavlov --- arch/mips/include/asm/io.h | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h index ff66ea5..dcda857 100644 --- a/arch/mips/include/asm/io.h +++ b/arch/mips/include/asm/io.h @@ -12,6 +12,7 @@ #include #include +#include #include void *dma_alloc_coherent(size_t size); @@ -21,6 +22,40 @@ void dma_clean_range(unsigned long, unsigned long); void dma_flush_range(unsigned long, unsigned long); void dma_inv_range(unsigned long, unsigned long); +/* + * virt_to_phys - map virtual addresses to physical + * @address: address to remap + * + * The returned physical address is the physical (CPU) mapping for + * the memory address given. It is only valid to use this function on + * addresses directly mapped or allocated via kmalloc. + * + * This function does not give bus mappings for DMA transfers. In + * almost all conceivable cases a device driver should not be using + * this function + */ +static inline unsigned long virt_to_phys(const void *address) +{ + return (unsigned long)address & 0x3fffffff; +} + +/* + * phys_to_virt - map physical address to virtual + * @address: address to remap + * + * The returned virtual address is a current CPU mapping for + * the memory address given. It is only valid to use this function on + * addresses that have a kernel mapping + * + * This function does not handle bus mappings for DMA transfers. In + * almost all conceivable cases a device driver should not be using + * this function + */ +static inline void *phys_to_virt(unsigned long address) +{ + return (void *)(KSEG0 | (address & 0x3fffffff)); +} + #define IO_SPACE_LIMIT 0 /*****************************************************************************/ -- 1.9.0 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox