linux-kernel - [PATCH 2/5] include: add setbits32/clrbits32/clrsetbits32/setbits64/clrbits64/clrsetbits64 in linux/setbits.h

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Message-Id: <1536349307-20714-3-git-send-email-clabbe@baylibre.com>
Date:   Fri,  7 Sep 2018 19:41:44 +0000
From:   Corentin Labbe <clabbe@...libre.com>
To:     Gilles.Muller@...6.fr, Julia.Lawall@...6.fr, agust@...x.de,
        alexandre.torgue@...com, alistair@...ple.id.au,
        benh@...nel.crashing.org, carlo@...one.org, davem@...emloft.net,
        galak@...nel.crashing.org, joabreu@...opsys.com,
        khilman@...libre.com, maxime.ripard@...tlin.com,
        michal.lkml@...kovi.net, mpe@...erman.id.au,
        mporter@...nel.crashing.org, nicolas.palix@...g.fr,
        oss@...error.net, paulus@...ba.org, peppe.cavallaro@...com,
        tj@...nel.org, vitb@...nel.crashing.org, wens@...e.org
Cc:     cocci@...teme.lip6.fr, linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-ide@...r.kernel.org,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        netdev@...r.kernel.org, linux-sunxi@...glegroups.com,
        Corentin Labbe <clabbe@...libre.com>
Subject: [PATCH 2/5] include: add setbits32/clrbits32/clrsetbits32/setbits64/clrbits64/clrsetbits64 in linux/setbits.h

This patch adds setbits32/clrbits32/clrsetbits32 and
setbits64/clrbits64/clrsetbits64 in linux/setbits.h header.

Signed-off-by: Corentin Labbe <clabbe@...libre.com>
---
 include/linux/setbits.h | 55 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 include/linux/setbits.h

diff --git a/include/linux/setbits.h b/include/linux/setbits.h
new file mode 100644
index 000000000000..3e1e273551bb
--- /dev/null
+++ b/include/linux/setbits.h
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_SETBITS_H
+#define __LINUX_SETBITS_H
+
+#include <linux/io.h>
+
+#define __setbits(readfunction, writefunction, addr, set) \
+	writefunction((readfunction(addr) | (set)), addr)
+#define __clrbits(readfunction, writefunction, addr, mask) \
+	writefunction((readfunction(addr) & ~(mask)), addr)
+#define __clrsetbits(readfunction, writefunction, addr, mask, set) \
+	writefunction(((readfunction(addr) & ~(mask)) | (set)), addr)
+#define __setclrbits(readfunction, writefunction, addr, mask, set) \
+	writefunction(((readfunction(addr) | (seti)) & ~(mask)), addr)
+
+#define setbits32(addr, set) __setbits(readl, writel, addr, set)
+#define setbits32_relaxed(addr, set) __setbits(readl_relaxed, writel_relaxed, \
+					       addr, set)
+
+#define clrbits32(addr, mask) __clrbits(readl, writel, addr, mask)
+#define clrbits32_relaxed(addr, mask) __clrbits(readl_relaxed, writel_relaxed, \
+						addr, mask)
+
+#define clrsetbits32(addr, mask, set) __clrsetbits(readl, writel, addr, mask, set)
+#define clrsetbits32_relaxed(addr, mask, set) __clrsetbits(readl_relaxed, \
+							   writel_relaxed, \
+							   addr, mask, set)
+
+#define setclrbits32(addr, mask, set) __setclrbits(readl, writel, addr, mask, set)
+#define setclrbits32_relaxed(addr, mask, set) __setclrbits(readl_relaxed, \
+							   writel_relaxed, \
+							   addr, mask, set)
+
+/* We cannot use CONFIG_64BIT as some x86 drivers use writeq */
+#if defined(writeq) && defined(readq)
+#define setbits64(addr, set) __setbits(readq, writeq, addr, set)
+#define setbits64_relaxed(addr, set) __setbits(readq_relaxed, writeq_relaxed, \
+					       addr, set)
+
+#define clrbits64(addr, mask) __clrbits(readq, writeq, addr, mask)
+#define clrbits64_relaxed(addr, mask) __clrbits(readq_relaxed, writeq_relaxed, \
+						addr, mask)
+
+#define clrsetbits64(addr, mask, set) __clrsetbits(readq, writeq, addr, mask, set)
+#define clrsetbits64_relaxed(addr, mask, set) __clrsetbits(readq_relaxed, \
+							   writeq_relaxed, \
+							   addr, mask, set)
+
+#define setclrbits64(addr, mask, set) __setclrbits(readq, writeq, addr, mask, set)
+#define setclrbits64_relaxed(addr, mask, set) __setclrbits(readq_relaxed, \
+							   writeq_relaxed, \
+							   addr, mask, set)
+#endif /* writeq/readq */
+
+#endif /* __LINUX_SETBITS_H */
-- 
2.16.4