From: Vineet Gupta <Vineet.Gupta1@synopsys.com>
To: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Noam Camus <noamca@mellanox.com>, <tglx@linutronix.de>,
<linux-snps-arc@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <Alexey.Brodkin@synopsys.com>,
kbuild test robot <fengguang.wu@intel.com>,
Vineet Gupta <Vineet.Gupta1@synopsys.com>
Subject: [PATCH v4 07/10] ARC: breakout aux handling into a separate header
Date: Mon, 7 Nov 2016 13:18:50 -0800 [thread overview]
Message-ID: <1478553531-20757-1-git-send-email-vgupta@synopsys.com> (raw)
In-Reply-To: <201611040843.A8Q0VBao%fengguang.wu@intel.com>
ARC timers use aux registers for programming and this paves way for
moving ARC timer drivers into drivers/clocksource
Reviewed-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
v3 -> v4
- rolled back update of nps header to use the new aux header as that
requires prior fixing.
---
arch/arc/include/asm/arcregs.h | 85 +-----------------------------------------
arch/arc/include/asm/mcip.h | 2 +-
include/soc/arc/aux.h | 63 +++++++++++++++++++++++++++++++
3 files changed, 65 insertions(+), 85 deletions(-)
create mode 100644 include/soc/arc/aux.h
diff --git a/arch/arc/include/asm/arcregs.h b/arch/arc/include/asm/arcregs.h
index 7f3f9f63708c..ccf5dc96713b 100644
--- a/arch/arc/include/asm/arcregs.h
+++ b/arch/arc/include/asm/arcregs.h
@@ -110,90 +110,7 @@
#ifndef __ASSEMBLY__
-/*
- ******************************************************************
- * Inline ASM macros to read/write AUX Regs
- * Essentially invocation of lr/sr insns from "C"
- */
-
-#if 1
-
-#define read_aux_reg(reg) __builtin_arc_lr(reg)
-
-/* gcc builtin sr needs reg param to be long immediate */
-#define write_aux_reg(reg_immed, val) \
- __builtin_arc_sr((unsigned int)(val), reg_immed)
-
-#else
-
-#define read_aux_reg(reg) \
-({ \
- unsigned int __ret; \
- __asm__ __volatile__( \
- " lr %0, [%1]" \
- : "=r"(__ret) \
- : "i"(reg)); \
- __ret; \
-})
-
-/*
- * Aux Reg address is specified as long immediate by caller
- * e.g.
- * write_aux_reg(0x69, some_val);
- * This generates tightest code.
- */
-#define write_aux_reg(reg_imm, val) \
-({ \
- __asm__ __volatile__( \
- " sr %0, [%1] \n" \
- : \
- : "ir"(val), "i"(reg_imm)); \
-})
-
-/*
- * Aux Reg address is specified in a variable
- * * e.g.
- * reg_num = 0x69
- * write_aux_reg2(reg_num, some_val);
- * This has to generate glue code to load the reg num from
- * memory to a reg hence not recommended.
- */
-#define write_aux_reg2(reg_in_var, val) \
-({ \
- unsigned int tmp; \
- \
- __asm__ __volatile__( \
- " ld %0, [%2] \n\t" \
- " sr %1, [%0] \n\t" \
- : "=&r"(tmp) \
- : "r"(val), "memory"(®_in_var)); \
-})
-
-#endif
-
-#define READ_BCR(reg, into) \
-{ \
- unsigned int tmp; \
- tmp = read_aux_reg(reg); \
- if (sizeof(tmp) == sizeof(into)) { \
- into = *((typeof(into) *)&tmp); \
- } else { \
- extern void bogus_undefined(void); \
- bogus_undefined(); \
- } \
-}
-
-#define WRITE_AUX(reg, into) \
-{ \
- unsigned int tmp; \
- if (sizeof(tmp) == sizeof(into)) { \
- tmp = (*(unsigned int *)&(into)); \
- write_aux_reg(reg, tmp); \
- } else { \
- extern void bogus_undefined(void); \
- bogus_undefined(); \
- } \
-}
+#include <soc/arc/aux.h>
/* Helpers */
#define TO_KB(bytes) ((bytes) >> 10)
diff --git a/arch/arc/include/asm/mcip.h b/arch/arc/include/asm/mcip.h
index c8fbe4114bad..fc28d0944801 100644
--- a/arch/arc/include/asm/mcip.h
+++ b/arch/arc/include/asm/mcip.h
@@ -13,7 +13,7 @@
#ifdef CONFIG_ISA_ARCV2
-#include <asm/arcregs.h>
+#include <soc/arc/aux.h>
#define ARC_REG_MCIP_BCR 0x0d0
#define ARC_REG_MCIP_CMD 0x600
diff --git a/include/soc/arc/aux.h b/include/soc/arc/aux.h
new file mode 100644
index 000000000000..8c3fb13e0452
--- /dev/null
+++ b/include/soc/arc/aux.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2016-2017 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#ifndef __SOC_ARC_AUX_H__
+#define __SOC_ARC_AUX_H__
+
+#ifdef CONFIG_ARC
+
+#define read_aux_reg(r) __builtin_arc_lr(r)
+
+/* gcc builtin sr needs reg param to be long immediate */
+#define write_aux_reg(r, v) __builtin_arc_sr((unsigned int)(v), r)
+
+#else /* !CONFIG_ARC */
+
+static inline int read_aux_reg(u32 r)
+{
+ return 0;
+}
+
+/*
+ * function helps elide unused variable warning
+ * see: http://lists.infradead.org/pipermail/linux-snps-arc/2016-November/001748.html
+ */
+static inline void write_aux_reg(u32 r, u32 v)
+{
+ ;
+}
+
+#endif
+
+#define READ_BCR(reg, into) \
+{ \
+ unsigned int tmp; \
+ tmp = read_aux_reg(reg); \
+ if (sizeof(tmp) == sizeof(into)) { \
+ into = *((typeof(into) *)&tmp); \
+ } else { \
+ extern void bogus_undefined(void); \
+ bogus_undefined(); \
+ } \
+}
+
+#define WRITE_AUX(reg, into) \
+{ \
+ unsigned int tmp; \
+ if (sizeof(tmp) == sizeof(into)) { \
+ tmp = (*(unsigned int *)&(into)); \
+ write_aux_reg(reg, tmp); \
+ } else { \
+ extern void bogus_undefined(void); \
+ bogus_undefined(); \
+ } \
+}
+
+
+#endif
--
2.7.4
next prev parent reply other threads:[~2016-11-07 21:19 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-03 23:33 [PATCH v3 00/10] Move ARC timer code into drivers/clocksource/ Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 01/10] ARC: timer: rtc: implement read loop in "C" vs. inline asm Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 02/10] ARC: timer: gfrc, rtc: deuglify big endian code Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 03/10] ARC: timer: gfrc, rtc: Read BCR to detect whether hardware exists Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 04/10] ARC: timer: gfrc: boot print alongside other timers Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 05/10] ARC: time: move time_init() out of the driver Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 06/10] ARC: timer: Build gfrc, rtc under same option (64-bit timers) Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 07/10] ARC: breakout aux handling into a separate header Vineet Gupta
2016-11-04 0:40 ` kbuild test robot
2016-11-07 21:18 ` Vineet Gupta [this message]
2016-11-07 21:18 ` [PATCH v4 " Vineet Gupta
2016-11-04 17:35 ` [PATCH v3 " Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 08/10] ARC: move mcip.h into include/soc and adjust the includes Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 09/10] ARC: breakout timer include code into separate header Vineet Gupta
2016-11-03 23:33 ` [PATCH v3 10/10] clocksource: import ARC timer driver Vineet Gupta
2016-11-10 10:49 ` Daniel Lezcano
2016-11-10 22:12 ` Vineet Gupta
2016-11-08 17:49 ` [PATCH v3 00/10] Move ARC timer code into drivers/clocksource/ Vineet Gupta
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