From: Kumar Gala <galak@kernel•crashing.org>
To: linuxppc-dev@ozlabs•org
Cc: Timur Tabi <timur@freescale•com>
Subject: [PATCH 18/22] [POWERPC] add clrsetbits macros
Date: Thu, 13 Sep 2007 16:07:56 -0500 [thread overview]
Message-ID: <11897177091972-git-send-email-galak@kernel.crashing.org> (raw)
In-Reply-To: <11897177071168-git-send-email-galak@kernel.crashing.org>
From: Timur Tabi <timur@freescale•com>
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 <timur@freescale•com>
Signed-off-by: Kumar Gala <galak@kernel•crashing.org>
---
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
next prev parent reply other threads:[~2007-09-13 21:08 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-13 21:07 [PATCH 00/22] [POWERPC] Patches in for-2.6.24 Kumar Gala
2007-09-13 21:07 ` [PATCH 01/22] ucc_geth: kill unused include Kumar Gala
2007-09-13 21:07 ` [PATCH 02/22] [POWERPC] 85xx: Renamed mpc8544_ds.c to mpc85xx_ds.c Kumar Gala
2007-09-13 21:07 ` [PATCH 03/22] [POWERPC] 85xx: Clean up from 85xx_ds rename Kumar Gala
2007-09-13 21:07 ` [PATCH 04/22] [POWERPC] Update mpc7448hpc2 device tree to be compatible for tsi109 chip Kumar Gala
2007-09-13 21:07 ` [PATCH 05/22] [POWERPC] linkstation updates Kumar Gala
2007-09-13 21:07 ` [PATCH 06/22] [POWERPC] 86xx: Remove unnecessary loops_per_jiffy initialization code Kumar Gala
2007-09-13 21:07 ` [PATCH 07/22] [POWERPC] 85xx: " Kumar Gala
2007-09-13 21:07 ` [PATCH 08/22] [POWERPC] fsl_soc.c cleanup Kumar Gala
2007-09-13 21:07 ` [PATCH 09/22] [POWERPC] Handle alignment faults on SPE load/store instructions Kumar Gala
2007-09-13 21:07 ` [PATCH 10/22] [POWERPC] 85xx: Add basic Uniprocessor MPC8572 DS port Kumar Gala
2007-09-13 21:07 ` [PATCH 11/22] [POWERPC] DTS cleanup Kumar Gala
2007-09-13 21:07 ` [PATCH 12/22] [POWERPC] Move PCI nodes to be sibilings with SOC nodes Kumar Gala
2007-09-13 21:07 ` [PATCH 13/22] [POWERPC] 83xx: Removed PCI exclude of PHB Kumar Gala
2007-09-13 21:07 ` [PATCH 14/22] [POWERPC] Add cpu feature for SPE handling Kumar Gala
2007-09-13 21:07 ` [PATCH 15/22] [POWERPC] Fix modpost warnings from head*.S on ppc32 Kumar Gala
2007-09-13 21:07 ` [PATCH 16/22] [PPC] Add clrbits8 and setbits8 Kumar Gala
2007-09-13 21:07 ` [PATCH 17/22] [POWERPC] QE: extern par_io_config_pin and par_io_data_set funcs Kumar Gala
2007-09-13 21:07 ` Kumar Gala [this message]
2007-09-13 21:07 ` [PATCH 19/22] [POWERPC] 86xx: Fix definition of global-utilites structure Kumar Gala
2007-09-13 21:07 ` [PATCH 20/22] [POWERPC] 52xx: Fix mpc52xx_uart_of_assign to use correct index Kumar Gala
2007-09-13 21:07 ` [PATCH 21/22] [POWERPC] fsl_soc: add support for fsl_spi Kumar Gala
2007-09-13 21:08 ` [PATCH 22/22] [POWERPC] MPC832x_RDB: Update dts to use SPI1 in QE, register mmc_spi stub Kumar Gala
2007-09-14 12:32 ` Paul Mackerras
2007-09-14 13:21 ` Kumar Gala
2007-09-14 13:50 ` Kumar Gala
2007-09-13 22:54 ` [PATCH 04/22] [POWERPC] Update mpc7448hpc2 device tree to be compatible for tsi109 chip Segher Boessenkool
2007-09-14 13:28 ` Kumar Gala
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