From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTP id B6B17DE040 for ; Fri, 14 Sep 2007 07:08:47 +1000 (EST) From: Kumar Gala To: linuxppc-dev@ozlabs.org Subject: [PATCH 18/22] [POWERPC] add clrsetbits macros Date: Thu, 13 Sep 2007 16:07:56 -0500 Message-Id: <11897177091972-git-send-email-galak@kernel.crashing.org> In-Reply-To: <11897177071168-git-send-email-galak@kernel.crashing.org> References: <11897176803590-git-send-email-galak@kernel.crashing.org> <1189717681533-git-send-email-galak@kernel.crashing.org> <1189717683471-git-send-email-galak@kernel.crashing.org> <11897176841013-git-send-email-galak@kernel.crashing.org> <11897176851400-git-send-email-galak@kernel.crashing.org> <1189717687832-git-send-email-galak@kernel.crashing.org> <11897176884163-git-send-email-galak@kernel.crashing.org> <1189717690413-git-send-email-galak@kernel.crashing.org> <1189717691261-git-send-email-galak@kernel.crashing.org> <11897176931664-git-send-email-galak@kernel.crashing.org> <118971769498-git-send-email-galak@kernel.crashing.org> <11897176964013-git-send-email-galak@kernel.crashing.org> <11897176992010-git-send-email-galak@kernel.crashing.org> <11897177013875-git-send-email-galak@kernel.crashing.org> <11897177032288-git-send-email-galak@kernel.crashing.org> <11897177042582-git-send-email-galak@kernel.crashing.org> <11897177052448-git-send-email-galak@kernel.crashing.org> <11897177071168-git-send-email-galak@kernel.crashing.org> Cc: Timur Tabi List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Timur Tabi This patch adds the clrsetbits_xxx() macros, which are 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. There are big-endian and little-endian versions for 8, 16, 32, and 64 bits. Signed-off-by: Timur Tabi Signed-off-by: Kumar Gala --- include/asm-powerpc/io.h | 23 +++++++++++++++++++++++ 1 files changed, 23 insertions(+), 0 deletions(-) diff --git a/include/asm-powerpc/io.h b/include/asm-powerpc/io.h index 4c0b550..6805efb 100644 --- a/include/asm-powerpc/io.h +++ b/include/asm-powerpc/io.h @@ -737,6 +737,29 @@ 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. These macros can be used to clear and + * set multiple bits in a register using a single read-modify-write. 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. + */ + +#define clrsetbits(type, addr, clear, set) \ + out_##type((addr), (in_##type(addr) & ~(clear)) | (set)) + +#ifdef __powerpc64__ +#define clrsetbits_be64(addr, clear, set) clrsetbits(be64, addr, clear, set) +#define clrsetbits_le64(addr, clear, set) clrsetbits(le64, addr, clear, set) +#endif + +#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set) +#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set) + +#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set) +#define clrsetbits_le16(addr, clear, set) clrsetbits(le32, addr, clear, set) + +#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set) + #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_IO_H */ -- 1.5.2.4