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* [U-Boot] [PATCH 1/2] ARMv7: Factor out reusable timer_wait from sunxi/psci_sun7i.S
@ 2015-06-04  4:01 Dongsheng Wang
  2015-06-04  4:01 ` [U-Boot] [PATCH 2/2] arm/ls102xa: Add PSCI support for ls102xa Dongsheng Wang
                   ` (3 more replies)
  0 siblings, 4 replies; 17+ messages in thread
From: Dongsheng Wang @ 2015-06-04  4:01 UTC (permalink / raw)
  To: u-boot

From: Wang Dongsheng <dongsheng.wang@freescale.com>

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>

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..0956d7c
--- /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_ */
-- 
2.1.0.27.g96db324

^ permalink raw reply related	[flat|nested] 17+ messages in thread

end of thread, other threads:[~2015-07-21  2:39 UTC | newest]

Thread overview: 17+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2015-06-04  4:01 [U-Boot] [PATCH 1/2] ARMv7: Factor out reusable timer_wait from sunxi/psci_sun7i.S Dongsheng Wang
2015-06-04  4:01 ` [U-Boot] [PATCH 2/2] arm/ls102xa: Add PSCI support for ls102xa Dongsheng Wang
2015-06-04  4:17   ` Wang Dongsheng
2015-07-14  7:14     ` Wang Dongsheng
2015-07-15  2:10       ` Wang Dongsheng
2015-07-15  2:25         ` Huan Wang
2015-07-20 21:14   ` York Sun
2015-06-04  4:16 ` [U-Boot] [PATCH 1/2] ARMv7: Factor out reusable timer_wait from sunxi/psci_sun7i.S Wang Dongsheng
2015-06-04 10:15 ` Hans de Goede
2015-06-05  8:41   ` Wang Dongsheng
2015-06-05  9:35     ` Hans de Goede
2015-06-05  9:39       ` Wang Dongsheng
2015-06-05 15:11         ` York Sun
2015-06-05 19:17           ` Hans de Goede
2015-07-14  7:15             ` Wang Dongsheng
2015-07-20 21:13 ` York Sun
2015-07-21  2:39   ` Wang Dongsheng

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