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 bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dgATf-00069I-Jq for barebox@lists.infradead.org; Fri, 11 Aug 2017 13:59:53 +0000 Message-ID: <1502459967.21055.32.camel@pengutronix.de> From: Lucas Stach Date: Fri, 11 Aug 2017 15:59:27 +0200 In-Reply-To: <20170811135525.19034-1-linux@rempel-privat.de> References: <20170811135525.19034-1-linux@rempel-privat.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: Re: [PATCH v2] MIPS: add virt_to_phys() and phys_to_virt() To: Oleksij Rempel Cc: barebox@lists.infradead.org, Peter Mamonov Am Freitag, den 11.08.2017, 15:55 +0200 schrieb Oleksij Rempel: > From: Antony Pavlov > > Signed-off-by: Antony Pavlov > Signed-off-by: Peter Mamonov > Signed-off-by: Oleksij Rempel > --- > changes. > v2: > - make use of use CPHYSADDR and CKSEG0ADDR > > 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 4bee5913a..d4eb623c3 100644 > --- a/arch/mips/include/asm/io.h > +++ b/arch/mips/include/asm/io.h > @@ -12,11 +12,46 @@ > > #include > #include > +#include > #include > > 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. The last sentence in this... > + * 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)CPHYSADDR(address); > +} > + > +/* > + * 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 ... and this paragraph have no meaning Barebox at all. > + * 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 *)CKSEG0ADDR(address); > +} > + > #define IO_SPACE_LIMIT 0 > > /*****************************************************************************/ _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox