[PATCH v7 20/37] nds32: VDSO support

2018-02-13 Thread Greentime Hu 
This patch adds VDSO support. The VDSO code is currently used for
sys_rt_sigreturn() and optimised gettimeofday() (using the SoC timer counter).

Signed-off-by: Vincent Chen 
Signed-off-by: Greentime Hu 
Acked-by: Arnd Bergmann 
---
 arch/nds32/include/asm/vdso.h  |  24 +++
 arch/nds32/include/asm/vdso_datapage.h |  36 
 arch/nds32/include/asm/vdso_timer_info.h   |  14 ++
 arch/nds32/kernel/vdso.c   | 230 
 arch/nds32/kernel/vdso/Makefile|  82 +
 arch/nds32/kernel/vdso/datapage.S  |  21 +++
 arch/nds32/kernel/vdso/gen_vdso_offsets.sh |  15 ++
 arch/nds32/kernel/vdso/gettimeofday.c  | 270 +
 arch/nds32/kernel/vdso/note.S  |  11 ++
 arch/nds32/kernel/vdso/sigreturn.S |  19 ++
 arch/nds32/kernel/vdso/vdso.S  |  18 ++
 arch/nds32/kernel/vdso/vdso.lds.S  |  76 
 12 files changed, 816 insertions(+)
 create mode 100644 arch/nds32/include/asm/vdso.h
 create mode 100644 arch/nds32/include/asm/vdso_datapage.h
 create mode 100644 arch/nds32/include/asm/vdso_timer_info.h
 create mode 100644 arch/nds32/kernel/vdso.c
 create mode 100644 arch/nds32/kernel/vdso/Makefile
 create mode 100644 arch/nds32/kernel/vdso/datapage.S
 create mode 100755 arch/nds32/kernel/vdso/gen_vdso_offsets.sh
 create mode 100644 arch/nds32/kernel/vdso/gettimeofday.c
 create mode 100644 arch/nds32/kernel/vdso/note.S
 create mode 100644 arch/nds32/kernel/vdso/sigreturn.S
 create mode 100644 arch/nds32/kernel/vdso/vdso.S
 create mode 100644 arch/nds32/kernel/vdso/vdso.lds.S

diff --git a/arch/nds32/include/asm/vdso.h b/arch/nds32/include/asm/vdso.h
new file mode 100644
index ..af2c6afc2469
--- /dev/null
+++ b/arch/nds32/include/asm/vdso.h
@@ -0,0 +1,24 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0
+ * Copyright (C) 2005-2017 Andes Technology Corporation
+ */
+
+#ifndef __ASM_VDSO_H
+#define __ASM_VDSO_H
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+
+#include 
+
+#define VDSO_SYMBOL(base, name)
   \
+({\
+   (unsigned long)(vdso_offset_##name + (unsigned long)(base)); \
+})
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_VDSO_H */
diff --git a/arch/nds32/include/asm/vdso_datapage.h 
b/arch/nds32/include/asm/vdso_datapage.h
new file mode 100644
index ..79db5a12ca5e
--- /dev/null
+++ b/arch/nds32/include/asm/vdso_datapage.h
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2012 ARM Limited
+// Copyright (C) 2005-2017 Andes Technology Corporation
+#ifndef __ASM_VDSO_DATAPAGE_H
+#define __ASM_VDSO_DATAPAGE_H
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+
+struct vdso_data {
+   bool cycle_count_down;  /* timer cyclye counter is decrease with time */
+   u32 cycle_count_offset; /* offset of timer cycle counter register */
+   u32 seq_count;  /* sequence count - odd during updates */
+   u32 xtime_coarse_sec;   /* coarse time */
+   u32 xtime_coarse_nsec;
+
+   u32 wtm_clock_sec;  /* wall to monotonic offset */
+   u32 wtm_clock_nsec;
+   u32 xtime_clock_sec;/* CLOCK_REALTIME - seconds */
+   u32 cs_mult;/* clocksource multiplier */
+   u32 cs_shift;   /* Cycle to nanosecond divisor (power of two) */
+
+   u64 cs_cycle_last;  /* last cycle value */
+   u64 cs_mask;/* clocksource mask */
+
+   u64 xtime_clock_nsec;   /* CLOCK_REALTIME sub-ns base */
+   u32 tz_minuteswest; /* timezone info for gettimeofday(2) */
+   u32 tz_dsttime;
+};
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_VDSO_DATAPAGE_H */
diff --git a/arch/nds32/include/asm/vdso_timer_info.h 
b/arch/nds32/include/asm/vdso_timer_info.h
new file mode 100644
index ..50ba117cff12
--- /dev/null
+++ b/arch/nds32/include/asm/vdso_timer_info.h
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2005-2017 Andes Technology Corporation
+
+extern struct timer_info_t timer_info;
+#define EMPTY_VALUE ~(0UL)
+#define EMPTY_TIMER_MAPPING EMPTY_VALUE
+#define EMPTY_REG_OFFSET EMPTY_VALUE
+
+struct timer_info_t
+{
+   bool cycle_count_down;
+   unsigned long mapping_base;
+   unsigned long cycle_count_reg_offset;
+};
diff --git a/arch/nds32/kernel/vdso.c b/arch/nds32/kernel/vdso.c
new file mode 100644
index ..f1198d7a5654
--- /dev/null
+++ b/arch/nds32/kernel/vdso.c
@@ -0,0 +1,230 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2012 ARM Limited
+// Copyright (C) 2005-2017 Andes Technology Corporation
+
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+
+#include 
+#include

[PATCH v7 20/37] nds32: VDSO support

2018-02-13 Thread Greentime Hu 
This patch adds VDSO support. The VDSO code is currently used for
sys_rt_sigreturn() and optimised gettimeofday() (using the SoC timer counter).

Signed-off-by: Vincent Chen 
Signed-off-by: Greentime Hu 
Acked-by: Arnd Bergmann 
---
 arch/nds32/include/asm/vdso.h  |  24 +++
 arch/nds32/include/asm/vdso_datapage.h |  36 
 arch/nds32/include/asm/vdso_timer_info.h   |  14 ++
 arch/nds32/kernel/vdso.c   | 230 
 arch/nds32/kernel/vdso/Makefile|  82 +
 arch/nds32/kernel/vdso/datapage.S  |  21 +++
 arch/nds32/kernel/vdso/gen_vdso_offsets.sh |  15 ++
 arch/nds32/kernel/vdso/gettimeofday.c  | 270 +
 arch/nds32/kernel/vdso/note.S  |  11 ++
 arch/nds32/kernel/vdso/sigreturn.S |  19 ++
 arch/nds32/kernel/vdso/vdso.S  |  18 ++
 arch/nds32/kernel/vdso/vdso.lds.S  |  76 
 12 files changed, 816 insertions(+)
 create mode 100644 arch/nds32/include/asm/vdso.h
 create mode 100644 arch/nds32/include/asm/vdso_datapage.h
 create mode 100644 arch/nds32/include/asm/vdso_timer_info.h
 create mode 100644 arch/nds32/kernel/vdso.c
 create mode 100644 arch/nds32/kernel/vdso/Makefile
 create mode 100644 arch/nds32/kernel/vdso/datapage.S
 create mode 100755 arch/nds32/kernel/vdso/gen_vdso_offsets.sh
 create mode 100644 arch/nds32/kernel/vdso/gettimeofday.c
 create mode 100644 arch/nds32/kernel/vdso/note.S
 create mode 100644 arch/nds32/kernel/vdso/sigreturn.S
 create mode 100644 arch/nds32/kernel/vdso/vdso.S
 create mode 100644 arch/nds32/kernel/vdso/vdso.lds.S

diff --git a/arch/nds32/include/asm/vdso.h b/arch/nds32/include/asm/vdso.h
new file mode 100644
index ..af2c6afc2469
--- /dev/null
+++ b/arch/nds32/include/asm/vdso.h
@@ -0,0 +1,24 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0
+ * Copyright (C) 2005-2017 Andes Technology Corporation
+ */
+
+#ifndef __ASM_VDSO_H
+#define __ASM_VDSO_H
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+
+#include 
+
+#define VDSO_SYMBOL(base, name)
   \
+({\
+   (unsigned long)(vdso_offset_##name + (unsigned long)(base)); \
+})
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_VDSO_H */
diff --git a/arch/nds32/include/asm/vdso_datapage.h 
b/arch/nds32/include/asm/vdso_datapage.h
new file mode 100644
index ..79db5a12ca5e
--- /dev/null
+++ b/arch/nds32/include/asm/vdso_datapage.h
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2012 ARM Limited
+// Copyright (C) 2005-2017 Andes Technology Corporation
+#ifndef __ASM_VDSO_DATAPAGE_H
+#define __ASM_VDSO_DATAPAGE_H
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+
+struct vdso_data {
+   bool cycle_count_down;  /* timer cyclye counter is decrease with time */
+   u32 cycle_count_offset; /* offset of timer cycle counter register */
+   u32 seq_count;  /* sequence count - odd during updates */
+   u32 xtime_coarse_sec;   /* coarse time */
+   u32 xtime_coarse_nsec;
+
+   u32 wtm_clock_sec;  /* wall to monotonic offset */
+   u32 wtm_clock_nsec;
+   u32 xtime_clock_sec;/* CLOCK_REALTIME - seconds */
+   u32 cs_mult;/* clocksource multiplier */
+   u32 cs_shift;   /* Cycle to nanosecond divisor (power of two) */
+
+   u64 cs_cycle_last;  /* last cycle value */
+   u64 cs_mask;/* clocksource mask */
+
+   u64 xtime_clock_nsec;   /* CLOCK_REALTIME sub-ns base */
+   u32 tz_minuteswest; /* timezone info for gettimeofday(2) */
+   u32 tz_dsttime;
+};
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_VDSO_DATAPAGE_H */
diff --git a/arch/nds32/include/asm/vdso_timer_info.h 
b/arch/nds32/include/asm/vdso_timer_info.h
new file mode 100644
index ..50ba117cff12
--- /dev/null
+++ b/arch/nds32/include/asm/vdso_timer_info.h
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2005-2017 Andes Technology Corporation
+
+extern struct timer_info_t timer_info;
+#define EMPTY_VALUE ~(0UL)
+#define EMPTY_TIMER_MAPPING EMPTY_VALUE
+#define EMPTY_REG_OFFSET EMPTY_VALUE
+
+struct timer_info_t
+{
+   bool cycle_count_down;
+   unsigned long mapping_base;
+   unsigned long cycle_count_reg_offset;
+};
diff --git a/arch/nds32/kernel/vdso.c b/arch/nds32/kernel/vdso.c
new file mode 100644
index ..f1198d7a5654
--- /dev/null
+++ b/arch/nds32/kernel/vdso.c
@@ -0,0 +1,230 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2012 ARM Limited
+// Copyright (C) 2005-2017 Andes Technology Corporation
+
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+
+#include 
+#include 
+#include 
+#include 
+#include 
+extern struct cache_info