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From: Andrey Smirnov <andrew.smirnov@gmail.com>
Date: Tue, 12 Jun 2018 13:52:48 -0700
Message-Id: <20180612205310.25745-33-andrew.smirnov@gmail.com>
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Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org
Subject: [PATCH v5 32/54] common/clock: Move delay and timeout functions to
lib/
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Move delay and timeout functions to lib/ in order to share them with
PBL. Currently only the most trivial implementation of get_time_ns()
usefull to implement never-expiring timeouts is provided. More work is
needed to allow board specific overrides.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
common/clock.c | 52 ------------------------------------
lib/Makefile | 1 +
lib/clock.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 73 insertions(+), 52 deletions(-)
create mode 100644 lib/clock.c
diff --git a/common/clock.c b/common/clock.c
index f98176dd5..c356a88b5 100644
--- a/common/clock.c
+++ b/common/clock.c
@@ -25,7 +25,6 @@
#include <init.h>
#include <asm-generic/div64.h>
#include <clock.h>
-#include <poller.h>
static uint64_t time_ns;
@@ -170,57 +169,6 @@ uint32_t clocksource_hz2mult(uint32_t hz, uint32_t shift_constant)
return (uint32_t)tmp;
}
-int is_timeout_non_interruptible(uint64_t start_ns, uint64_t time_offset_ns)
-{
- if ((int64_t)(start_ns + time_offset_ns - get_time_ns()) < 0)
- return 1;
- else
- return 0;
-}
-EXPORT_SYMBOL(is_timeout_non_interruptible);
-
-int is_timeout(uint64_t start_ns, uint64_t time_offset_ns)
-{
- if (time_offset_ns >= 100 * USECOND)
- poller_call();
-
- return is_timeout_non_interruptible(start_ns, time_offset_ns);
-}
-EXPORT_SYMBOL(is_timeout);
-
-void ndelay(unsigned long nsecs)
-{
- uint64_t start = get_time_ns();
-
- while(!is_timeout_non_interruptible(start, nsecs));
-}
-EXPORT_SYMBOL(ndelay);
-
-void udelay(unsigned long usecs)
-{
- uint64_t start = get_time_ns();
-
- while(!is_timeout(start, usecs * USECOND));
-}
-EXPORT_SYMBOL(udelay);
-
-void mdelay(unsigned long msecs)
-{
- uint64_t start = get_time_ns();
-
- while(!is_timeout(start, msecs * MSECOND));
-}
-EXPORT_SYMBOL(mdelay);
-
-void mdelay_non_interruptible(unsigned long msecs)
-{
- uint64_t start = get_time_ns();
-
- while (!is_timeout_non_interruptible(start, msecs * MSECOND))
- ;
-}
-EXPORT_SYMBOL(mdelay_non_interruptible);
-
int init_clock(struct clocksource *cs)
{
if (current_clock && cs->priority <= current_clock->priority)
diff --git a/lib/Makefile b/lib/Makefile
index a7498288a..09c250a1c 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -65,3 +65,4 @@ obj-y += int_sqrt.o
obj-y += parseopt.o
obj-y += clz_ctz.o
obj-$(CONFIG_CRC_CCITT) += crc-ccitt.o
+obj-pbl-y += clock.o
\ No newline at end of file
diff --git a/lib/clock.c b/lib/clock.c
new file mode 100644
index 000000000..b7cc49fa6
--- /dev/null
+++ b/lib/clock.c
@@ -0,0 +1,72 @@
+#include <common.h>
+#include <asm-generic/div64.h>
+#include <poller.h>
+
+int is_timeout_non_interruptible(uint64_t start_ns, uint64_t time_offset_ns)
+{
+ if ((int64_t)(start_ns + time_offset_ns - get_time_ns()) < 0)
+ return 1;
+ else
+ return 0;
+}
+EXPORT_SYMBOL(is_timeout_non_interruptible);
+
+#if defined(__PBL__)
+/*
+ * Poller infrastructure is not available in PBL, so we just define
+ * is_timeout to be a synonym for is_timeout_non_interruptible
+ */
+int is_timeout(uint64_t start_ns, uint64_t time_offset_ns)
+ __alias(is_timeout_non_interruptible);
+#else
+#include <poller.h>
+
+int is_timeout(uint64_t start_ns, uint64_t time_offset_ns)
+{
+
+ if (time_offset_ns >= 100 * USECOND)
+ poller_call();
+
+ return is_timeout_non_interruptible(start_ns, time_offset_ns);
+}
+#endif
+EXPORT_SYMBOL(is_timeout);
+
+void ndelay(unsigned long nsecs)
+{
+ uint64_t start = get_time_ns();
+
+ while(!is_timeout_non_interruptible(start, nsecs));
+}
+EXPORT_SYMBOL(ndelay);
+
+void udelay(unsigned long usecs)
+{
+ uint64_t start = get_time_ns();
+
+ while(!is_timeout(start, usecs * USECOND));
+}
+EXPORT_SYMBOL(udelay);
+
+void mdelay(unsigned long msecs)
+{
+ uint64_t start = get_time_ns();
+
+ while(!is_timeout(start, msecs * MSECOND));
+}
+EXPORT_SYMBOL(mdelay);
+
+void mdelay_non_interruptible(unsigned long msecs)
+{
+ uint64_t start = get_time_ns();
+
+ while (!is_timeout_non_interruptible(start, msecs * MSECOND))
+ ;
+}
+EXPORT_SYMBOL(mdelay_non_interruptible);
+
+__weak uint64_t get_time_ns(void)
+{
+ return 0;
+}
+EXPORT_SYMBOL(get_time_ns);
\ No newline at end of file
--
2.17.0
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