From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from de01egw01.freescale.net (de01egw01.freescale.net [192.88.165.102]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "de01egw01.freescale.net", Issuer "Thawte Premium Server CA" (verified OK)) by ozlabs.org (Postfix) with ESMTP id 6B0F5DDF42 for ; Thu, 23 Aug 2007 03:47:28 +1000 (EST) Received: from de01smr01.freescale.net (de01smr01.freescale.net [10.208.0.31]) by de01egw01.freescale.net (8.12.11/de01egw01) with ESMTP id l7MHlJ2C029207 for ; Wed, 22 Aug 2007 10:47:20 -0700 (MST) From: Timur Tabi To: linuxppc-dev@ozlabs.org Subject: [POWERPC] add clrsetbits macros Date: Wed, 22 Aug 2007 12:47:16 -0500 Message-Id: <11878048362390-git-send-email-timur@freescale.com> Cc: Timur Tabi List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This patch adds the clrsetbits() macro, which is used to set and clear multiple bits in a single read-modify-write operation. Specify the bits to clear in the 'clear' parameter and the bits to set in the 'set' parameter. These macros can also be used to set a multiple-bit bit pattern using a mask, by specifying the mask in the 'clear' parameter and the new bit pattern in the 'set' parameter. The 'type' parameter is used to specify the size and endian. Signed-off-by: Timur Tabi --- Replace multiple macros with a single one that uses macro concatenation to handle the endian/size. include/asm-powerpc/io.h | 13 +++++++++++++ 1 files changed, 13 insertions(+), 0 deletions(-) diff --git a/include/asm-powerpc/io.h b/include/asm-powerpc/io.h index 4c0b550..030ed4e 100644 --- a/include/asm-powerpc/io.h +++ b/include/asm-powerpc/io.h @@ -737,6 +737,19 @@ static inline void * bus_to_virt(unsigned long address) #define setbits8(_addr, _v) out_8((_addr), in_8(_addr) | (_v)) #define clrbits8(_addr, _v) out_8((_addr), in_8(_addr) & ~(_v)) +/* Clear and set bits in one shot. This macrocan be used to clear and set + * multiple bits in a register using a single read-modify-write. It can + * also be used to set a multiple-bit bit pattern using a mask, by + * specifying the mask in the 'clear' parameter and the new bit pattern in + * the 'set' parameter. + * + * For 'type', specify 8, le16, be16, le32, be32, le64, or be64. The latter + * two only work on 64-bit PowerPC (__powerpc64__ is defined). + */ + +#define clrsetbits(type, addr, clear, set) \ + out_##type((addr), (in_##type(addr) & ~(clear)) | (set)) + #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_IO_H */ -- 1.5.2.4