From: robherring2@gmail.com (Rob Herring)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/3] ARM: convert platform hotplug inline assembly to C
Date: Wed, 16 Jan 2013 20:53:24 -0600 [thread overview]
Message-ID: <1358391205-23943-2-git-send-email-robherring2@gmail.com> (raw)
In-Reply-To: <1358391205-23943-1-git-send-email-robherring2@gmail.com>
From: Rob Herring <rob.herring@calxeda.com>
With the addition of set_auxcr/get_auxcr, all the hotplug inline assembly
code for exynos, imx, realview, spear13xx and vexpress can be converted to
C code.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Viresh Kumar <viresh.linux@gmail.com>
Cc: Shiraz Hashim <shiraz.hashim@st.com>
---
arch/arm/mach-exynos/hotplug.c | 57 ++++++-------------------------------
arch/arm/mach-imx/hotplug.c | 19 ++++---------
arch/arm/mach-realview/hotplug.c | 32 +++++----------------
arch/arm/mach-spear13xx/hotplug.c | 32 +++++----------------
arch/arm/mach-vexpress/hotplug.c | 33 +++++----------------
5 files changed, 35 insertions(+), 138 deletions(-)
diff --git a/arch/arm/mach-exynos/hotplug.c b/arch/arm/mach-exynos/hotplug.c
index c3f825b..5548fa3 100644
--- a/arch/arm/mach-exynos/hotplug.c
+++ b/arch/arm/mach-exynos/hotplug.c
@@ -26,69 +26,30 @@
static inline void cpu_enter_lowpower_a9(void)
{
- unsigned int v;
-
flush_cache_all();
- asm volatile(
- " mcr p15, 0, %1, c7, c5, 0\n"
- " mcr p15, 0, %1, c7, c10, 4\n"
+ __flush_icache_all();
+ dsb();
+
/*
* Turn off coherency
*/
- " mrc p15, 0, %0, c1, c0, 1\n"
- " bic %0, %0, %3\n"
- " mcr p15, 0, %0, c1, c0, 1\n"
- " mrc p15, 0, %0, c1, c0, 0\n"
- " bic %0, %0, %2\n"
- " mcr p15, 0, %0, c1, c0, 0\n"
- : "=&r" (v)
- : "r" (0), "Ir" (CR_C), "Ir" (0x40)
- : "cc");
+ set_auxcr(get_auxcr() & ~0x40);
+ set_cr(get_cr() & ~CR_C);
}
static inline void cpu_enter_lowpower_a15(void)
{
- unsigned int v;
-
- asm volatile(
- " mrc p15, 0, %0, c1, c0, 0\n"
- " bic %0, %0, %1\n"
- " mcr p15, 0, %0, c1, c0, 0\n"
- : "=&r" (v)
- : "Ir" (CR_C)
- : "cc");
-
+ set_cr(get_cr() & ~CR_C);
flush_cache_louis();
+ set_auxcr(get_auxcr() & ~0x40);
- asm volatile(
- /*
- * Turn off coherency
- */
- " mrc p15, 0, %0, c1, c0, 1\n"
- " bic %0, %0, %1\n"
- " mcr p15, 0, %0, c1, c0, 1\n"
- : "=&r" (v)
- : "Ir" (0x40)
- : "cc");
-
- isb();
dsb();
}
static inline void cpu_leave_lowpower(void)
{
- unsigned int v;
-
- asm volatile(
- "mrc p15, 0, %0, c1, c0, 0\n"
- " orr %0, %0, %1\n"
- " mcr p15, 0, %0, c1, c0, 0\n"
- " mrc p15, 0, %0, c1, c0, 1\n"
- " orr %0, %0, %2\n"
- " mcr p15, 0, %0, c1, c0, 1\n"
- : "=&r" (v)
- : "Ir" (CR_C), "Ir" (0x40)
- : "cc");
+ set_cr(get_cr() | CR_C);
+ set_auxcr(get_auxcr() | 0x40);
}
static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
diff --git a/arch/arm/mach-imx/hotplug.c b/arch/arm/mach-imx/hotplug.c
index 3dec962..1470c75 100644
--- a/arch/arm/mach-imx/hotplug.c
+++ b/arch/arm/mach-imx/hotplug.c
@@ -18,24 +18,15 @@
static inline void cpu_enter_lowpower(void)
{
- unsigned int v;
-
flush_cache_all();
- asm volatile(
- "mcr p15, 0, %1, c7, c5, 0\n"
- " mcr p15, 0, %1, c7, c10, 4\n"
+ __flush_icache_all();
+ dsb();
+
/*
* Turn off coherency
*/
- " mrc p15, 0, %0, c1, c0, 1\n"
- " bic %0, %0, %3\n"
- " mcr p15, 0, %0, c1, c0, 1\n"
- " mrc p15, 0, %0, c1, c0, 0\n"
- " bic %0, %0, %2\n"
- " mcr p15, 0, %0, c1, c0, 0\n"
- : "=&r" (v)
- : "r" (0), "Ir" (CR_C), "Ir" (0x40)
- : "cc");
+ set_auxcr(get_auxcr() & ~0x40);
+ set_cr(get_cr() & ~CR_C);
}
/*
diff --git a/arch/arm/mach-realview/hotplug.c b/arch/arm/mach-realview/hotplug.c
index 53818e5..c17c8c0 100644
--- a/arch/arm/mach-realview/hotplug.c
+++ b/arch/arm/mach-realview/hotplug.c
@@ -18,39 +18,21 @@
static inline void cpu_enter_lowpower(void)
{
- unsigned int v;
-
flush_cache_all();
- asm volatile(
- " mcr p15, 0, %1, c7, c5, 0\n"
- " mcr p15, 0, %1, c7, c10, 4\n"
+ __flush_icache_all();
+ dsb();
+
/*
* Turn off coherency
*/
- " mrc p15, 0, %0, c1, c0, 1\n"
- " bic %0, %0, #0x20\n"
- " mcr p15, 0, %0, c1, c0, 1\n"
- " mrc p15, 0, %0, c1, c0, 0\n"
- " bic %0, %0, %2\n"
- " mcr p15, 0, %0, c1, c0, 0\n"
- : "=&r" (v)
- : "r" (0), "Ir" (CR_C)
- : "cc");
+ set_auxcr(get_auxcr() & ~0x40);
+ set_cr(get_cr() & ~CR_C);
}
static inline void cpu_leave_lowpower(void)
{
- unsigned int v;
-
- asm volatile( "mrc p15, 0, %0, c1, c0, 0\n"
- " orr %0, %0, %1\n"
- " mcr p15, 0, %0, c1, c0, 0\n"
- " mrc p15, 0, %0, c1, c0, 1\n"
- " orr %0, %0, #0x20\n"
- " mcr p15, 0, %0, c1, c0, 1\n"
- : "=&r" (v)
- : "Ir" (CR_C)
- : "cc");
+ set_cr(get_cr() | CR_C);
+ set_auxcr(get_auxcr() | 0x40);
}
static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
diff --git a/arch/arm/mach-spear13xx/hotplug.c b/arch/arm/mach-spear13xx/hotplug.c
index a7d2dd1..a38a087 100644
--- a/arch/arm/mach-spear13xx/hotplug.c
+++ b/arch/arm/mach-spear13xx/hotplug.c
@@ -19,39 +19,21 @@
static inline void cpu_enter_lowpower(void)
{
- unsigned int v;
-
flush_cache_all();
- asm volatile(
- " mcr p15, 0, %1, c7, c5, 0\n"
- " dsb\n"
+ __flush_icache_all();
+ dsb();
+
/*
* Turn off coherency
*/
- " mrc p15, 0, %0, c1, c0, 1\n"
- " bic %0, %0, #0x20\n"
- " mcr p15, 0, %0, c1, c0, 1\n"
- " mrc p15, 0, %0, c1, c0, 0\n"
- " bic %0, %0, %2\n"
- " mcr p15, 0, %0, c1, c0, 0\n"
- : "=&r" (v)
- : "r" (0), "Ir" (CR_C)
- : "cc", "memory");
+ set_auxcr(get_auxcr() & ~0x40);
+ set_cr(get_cr() & ~CR_C);
}
static inline void cpu_leave_lowpower(void)
{
- unsigned int v;
-
- asm volatile("mrc p15, 0, %0, c1, c0, 0\n"
- " orr %0, %0, %1\n"
- " mcr p15, 0, %0, c1, c0, 0\n"
- " mrc p15, 0, %0, c1, c0, 1\n"
- " orr %0, %0, #0x20\n"
- " mcr p15, 0, %0, c1, c0, 1\n"
- : "=&r" (v)
- : "Ir" (CR_C)
- : "cc");
+ set_cr(get_cr() | CR_C);
+ set_auxcr(get_auxcr() | 0x40);
}
static inline void spear13xx_do_lowpower(unsigned int cpu, int *spurious)
diff --git a/arch/arm/mach-vexpress/hotplug.c b/arch/arm/mach-vexpress/hotplug.c
index a141b98..74a9eb5 100644
--- a/arch/arm/mach-vexpress/hotplug.c
+++ b/arch/arm/mach-vexpress/hotplug.c
@@ -18,40 +18,21 @@
static inline void cpu_enter_lowpower(void)
{
- unsigned int v;
-
flush_cache_all();
- asm volatile(
- "mcr p15, 0, %1, c7, c5, 0\n"
- " mcr p15, 0, %1, c7, c10, 4\n"
+ __flush_icache_all();
+ dsb();
+
/*
* Turn off coherency
*/
- " mrc p15, 0, %0, c1, c0, 1\n"
- " bic %0, %0, %3\n"
- " mcr p15, 0, %0, c1, c0, 1\n"
- " mrc p15, 0, %0, c1, c0, 0\n"
- " bic %0, %0, %2\n"
- " mcr p15, 0, %0, c1, c0, 0\n"
- : "=&r" (v)
- : "r" (0), "Ir" (CR_C), "Ir" (0x40)
- : "cc");
+ set_auxcr(get_auxcr() & ~0x40);
+ set_cr(get_cr() & ~CR_C);
}
static inline void cpu_leave_lowpower(void)
{
- unsigned int v;
-
- asm volatile(
- "mrc p15, 0, %0, c1, c0, 0\n"
- " orr %0, %0, %1\n"
- " mcr p15, 0, %0, c1, c0, 0\n"
- " mrc p15, 0, %0, c1, c0, 1\n"
- " orr %0, %0, %2\n"
- " mcr p15, 0, %0, c1, c0, 1\n"
- : "=&r" (v)
- : "Ir" (CR_C), "Ir" (0x40)
- : "cc");
+ set_cr(get_cr() | CR_C);
+ set_auxcr(get_auxcr() | 0x40);
}
static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
--
1.7.10.4
next prev parent reply other threads:[~2013-01-17 2:53 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-17 2:53 [PATCH 1/3] ARM: introduce common set_auxcr/get_auxcr functions Rob Herring
2013-01-17 2:53 ` Rob Herring [this message]
2013-01-17 4:40 ` [PATCH 2/3] ARM: convert platform hotplug inline assembly to C Nicolas Pitre
2013-01-17 14:18 ` Rob Herring
2013-01-17 15:42 ` Nicolas Pitre
2013-01-18 3:34 ` Rob Herring
2013-01-18 4:56 ` Nicolas Pitre
2013-01-17 2:53 ` [PATCH 3/3] ARM: omap2: use get_auxcr for aux ctrl register read Rob Herring
2013-01-17 4:41 ` Nicolas Pitre
2013-01-17 8:30 ` Santosh Shilimkar
2013-01-17 17:07 ` Tony Lindgren
2013-01-17 4:34 ` [PATCH 1/3] ARM: introduce common set_auxcr/get_auxcr functions Nicolas Pitre
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