From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Chou Date: Tue, 5 Jan 2016 10:45:51 +0800 Subject: [U-Boot] [PATCH v6 01/10] mips: implement to access the KSEG0/1 memory range in map_physmem In-Reply-To: References: Message-ID: <568B2E5F.4010202@wytron.com.tw> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi Wills, On 2016?01?04? 19:14, Wills Wang wrote: > U-boot just use the no MMU virtual address segment(KSEG0/1), this > patch enable access the uncached memory range(KSEG1) by flag > "MAP_NOCACHE", other flag for KSEG0 access. > > Signed-off-by: Wills Wang > --- > > Changes in v6: > - Remove useless "else" > > Changes in v5: None > Changes in v4: None > Changes in v3: None > Changes in v2: None > > arch/mips/include/asm/io.h | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h > index a7ab087..77353e5 100644 > --- a/arch/mips/include/asm/io.h > +++ b/arch/mips/include/asm/io.h > @@ -485,7 +485,7 @@ static inline void sync(void) > * that can be used to access the memory range with the caching > * properties specified by "flags". > */ > -#define MAP_NOCACHE (0) > +#define MAP_NOCACHE (1) > #define MAP_WRCOMBINE (0) > #define MAP_WRBACK (0) > #define MAP_WRTHROUGH (0) > @@ -493,7 +493,9 @@ static inline void sync(void) > static inline void * > map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) > { > - return (void *)paddr; > + if (flags) > + return (void *)KSEG1ADDR(paddr); > + return (void *)KSEG0ADDR(paddr); > } > > /* > But Daniel has suggested CKSEG1ADDR() instead. :) Best regards, Thomas