From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Campbell Subject: [PATCH RFC 2/8] xen/arm: implement read[bl] and write[bl] Date: Tue, 10 Sep 2013 15:18:19 +0100 Message-ID: <1378822705-19310-2-git-send-email-ian.campbell@citrix.com> References: <1378822681.10928.8.camel@kazak.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1378822681.10928.8.camel@kazak.uk.xensource.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xen.org Cc: Josh Zhao , julien.grall@linaro.org, tim@xen.org, Ian Campbell , stefano.stabellini@eu.citrix.com List-Id: xen-devel@lists.xenproject.org These are used in common driver code (specifically ns16550) Signed-off-by: Ian Campbell --- xen/include/asm-arm/io.h | 48 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/xen/include/asm-arm/io.h b/xen/include/asm-arm/io.h index aea5233..170263f 100644 --- a/xen/include/asm-arm/io.h +++ b/xen/include/asm-arm/io.h @@ -1,6 +1,54 @@ #ifndef _ASM_IO_H #define _ASM_IO_H +static inline void __raw_writeb(u8 val, volatile void __iomem *addr) +{ + asm volatile("strb %1, %0" + : "+Qo" (*(volatile u8 __force *)addr) + : "r" (val)); +} + +static inline void __raw_writel(u32 val, volatile void __iomem *addr) +{ + asm volatile("str %1, %0" + : "+Qo" (*(volatile u32 __force *)addr) + : "r" (val)); +} + +static inline u8 __raw_readb(const volatile void __iomem *addr) +{ + u8 val; + asm volatile("ldrb %1, %0" + : "+Qo" (*(volatile u8 __force *)addr), + "=r" (val)); + return val; +} + +static inline u32 __raw_readl(const volatile void __iomem *addr) +{ + u32 val; + asm volatile("ldr %1, %0" + : "+Qo" (*(volatile u32 __force *)addr), + "=r" (val)); + return val; +} + +#define __iormb() rmb() +#define __iowmb() wmb() + +#define readb_relaxed(c) ({ u8 __r = __raw_readb(c); __r; }) +#define readl_relaxed(c) ({ u32 __r = le32_to_cpu((__force __le32) \ + __raw_readl(c)); __r; }) + +#define writeb_relaxed(v,c) __raw_writeb(v,c) +#define writel_relaxed(v,c) __raw_writel((__force u32) cpu_to_le32(v),c) + +#define readb(c) ({ u8 __v = readb_relaxed(c); __iormb(); __v; }) +#define readl(c) ({ u32 __v = readl_relaxed(c); __iormb(); __v; }) + +#define writeb(v,c) ({ __iowmb(); writeb_relaxed(v,c); }) +#define writel(v,c) ({ __iowmb(); writel_relaxed(v,c); }) + #endif /* * Local variables: -- 1.7.10.4