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authorWang Dongsheng <dongsheng.wang@freescale.com>2015-06-04 12:01:08 +0800
committerYork Sun <yorksun@freescale.com>2015-07-20 11:44:38 -0700
commit972af2ab515fe0d0a39271966c9c6df0d9349f37 (patch)
tree13b521e3e6303f298d0d9f498364dcd380e44986 /arch
parent49a5e42a780dadf69fcac177143b0c8619ec467b (diff)
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ARMv7: Factor out reusable timer_wait from sunxi/psci_sun7i.S
timer_wait is moved from sunxi/psci_sun7i.S, and it can be converted completely into a reusable armv7 generic timer. LS1021A will use it as well. Signed-off-by: Wang Dongsheng <dongsheng.wang@freescale.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: York Sun <yorksun@freescale.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/cpu/armv7/sunxi/psci_sun6i.S22
-rw-r--r--arch/arm/cpu/armv7/sunxi/psci_sun7i.S22
-rw-r--r--arch/arm/include/asm/arch-armv7/generictimer.h50
3 files changed, 54 insertions, 40 deletions
diff --git a/arch/arm/cpu/armv7/sunxi/psci_sun6i.S b/arch/arm/cpu/armv7/sunxi/psci_sun6i.S
index d4cb51e..4ff46e4 100644
--- a/arch/arm/cpu/armv7/sunxi/psci_sun6i.S
+++ b/arch/arm/cpu/armv7/sunxi/psci_sun6i.S
@@ -18,6 +18,8 @@
*/
#include <config.h>
+
+#include <asm/arch-armv7/generictimer.h>
#include <asm/gic.h>
#include <asm/macro.h>
#include <asm/psci.h>
@@ -43,26 +45,6 @@
#define GICD_BASE 0x1c81000
#define GICC_BASE 0x1c82000
-.macro timer_wait reg, ticks
- @ Program CNTP_TVAL
- movw \reg, #(\ticks & 0xffff)
- movt \reg, #(\ticks >> 16)
- mcr p15, 0, \reg, c14, c2, 0
- isb
- @ Enable physical timer, mask interrupt
- mov \reg, #3
- mcr p15, 0, \reg, c14, c2, 1
- @ Poll physical timer until ISTATUS is on
-1: isb
- mrc p15, 0, \reg, c14, c2, 1
- ands \reg, \reg, #4
- bne 1b
- @ Disable timer
- mov \reg, #0
- mcr p15, 0, \reg, c14, c2, 1
- isb
-.endm
-
.globl psci_fiq_enter
psci_fiq_enter:
push {r0-r12}
diff --git a/arch/arm/cpu/armv7/sunxi/psci_sun7i.S b/arch/arm/cpu/armv7/sunxi/psci_sun7i.S
index bbfeec8..e15d587 100644
--- a/arch/arm/cpu/armv7/sunxi/psci_sun7i.S
+++ b/arch/arm/cpu/armv7/sunxi/psci_sun7i.S
@@ -18,6 +18,8 @@
*/
#include <config.h>
+
+#include <asm/arch-armv7/generictimer.h>
#include <asm/gic.h>
#include <asm/macro.h>
#include <asm/psci.h>
@@ -43,26 +45,6 @@
#define GICD_BASE 0x1c81000
#define GICC_BASE 0x1c82000
-.macro timer_wait reg, ticks
- @ Program CNTP_TVAL
- movw \reg, #(\ticks & 0xffff)
- movt \reg, #(\ticks >> 16)
- mcr p15, 0, \reg, c14, c2, 0
- isb
- @ Enable physical timer, mask interrupt
- mov \reg, #3
- mcr p15, 0, \reg, c14, c2, 1
- @ Poll physical timer until ISTATUS is on
-1: isb
- mrc p15, 0, \reg, c14, c2, 1
- ands \reg, \reg, #4
- bne 1b
- @ Disable timer
- mov \reg, #0
- mcr p15, 0, \reg, c14, c2, 1
- isb
-.endm
-
.globl psci_fiq_enter
psci_fiq_enter:
push {r0-r12}
diff --git a/arch/arm/include/asm/arch-armv7/generictimer.h b/arch/arm/include/asm/arch-armv7/generictimer.h
new file mode 100644
index 0000000..f402686
--- /dev/null
+++ b/arch/arm/include/asm/arch-armv7/generictimer.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2013 - ARM Ltd
+ * Author: Marc Zyngier <marc.zyngier@arm.com>
+ *
+ * Based on code by Carl van Schaik <carl@ok-labs.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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _GENERICTIMER_H_
+#define _GENERICTIMER_H_
+
+#ifdef __ASSEMBLY__
+
+/*
+ * This macro provide a physical timer that can be used for delay in the code.
+ * The macro is moved from sunxi/psci_sun7i.S
+ *
+ * reg: is used in this macro.
+ * ticks: The freq is based on generic timer.
+ */
+.macro timer_wait reg, ticks
+ movw \reg, #(\ticks & 0xffff)
+ movt \reg, #(\ticks >> 16)
+ mcr p15, 0, \reg, c14, c2, 0
+ isb
+ mov \reg, #3
+ mcr p15, 0, \reg, c14, c2, 1
+1 : isb
+ mrc p15, 0, \reg, c14, c2, 1
+ ands \reg, \reg, #4
+ bne 1b
+ mov \reg, #0
+ mcr p15, 0, \reg, c14, c2, 1
+ isb
+.endm
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _GENERICTIMER_H_ */