From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-lf0-x244.google.com ([2a00:1450:4010:c07::244]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1deo96-0006qa-Ax for barebox@lists.infradead.org; Mon, 07 Aug 2017 19:57:02 +0000 Received: by mail-lf0-x244.google.com with SMTP id o85so1001894lff.1 for ; Mon, 07 Aug 2017 12:56:37 -0700 (PDT) Date: Mon, 7 Aug 2017 22:56:21 +0300 From: Peter Mamonov Message-ID: <20170807195621.myx26ctlfm4jllie@zacate> References: <20170807143927.1641-1-linux@rempel-privat.de> <20170807143927.1641-4-linux@rempel-privat.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20170807143927.1641-4-linux@rempel-privat.de> 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 04/13] MIPS: add virt_to_phys() and phys_to_virt() To: Oleksij Rempel Cc: barebox@lists.infradead.org Hi Oleksij, On Mon, Aug 07, 2017 at 04:39:18PM +0200, Oleksij Rempel wrote: > From: Antony Pavlov > > Signed-off-by: Antony Pavlov > Signed-off-by: Peter Mamonov > --- > 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..993b30e2a 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. > + * > + * 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 & 0x1fffffff; Guess we can use CPHYSADDR() macros here, which is available in barebox. > +} > + > +/* > + * 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 & 0x1fffffff)); Same here: there is a CKSEG0ADDR() macros available in barebox. > +} > + > #define IO_SPACE_LIMIT 0 > > /*****************************************************************************/ > -- > 2.11.0 > Regards, Peter _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox