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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 18/45] xen: arm64: interrupt/abort mask/unmask
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
xen/include/asm-arm/arm32/system.h | 44 +++++++++++++++++++++++++++++
xen/include/asm-arm/arm64/system.h | 54 ++++++++++++++++++++++++++++++++++++
xen/include/asm-arm/system.h | 44 -----------------------------
3 files changed, 98 insertions(+), 44 deletions(-)
diff --git a/xen/include/asm-arm/arm32/system.h
b/xen/include/asm-arm/arm32/system.h
index 9dbe8e3..ac8fcb0 100644
--- a/xen/include/asm-arm/arm32/system.h
+++ b/xen/include/asm-arm/arm32/system.h
@@ -133,6 +133,50 @@ static always_inline unsigned long __cmpxchg(
((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o), \
(unsigned long)(n),sizeof(*(ptr))))
+#define local_irq_disable() asm volatile ( "cpsid i @ local_irq_disable\n" : :
: "cc" )
+#define local_irq_enable() asm volatile ( "cpsie i @ local_irq_enable\n" : :
: "cc" )
+
+#define local_save_flags(x) \
+({ \
+ BUILD_BUG_ON(sizeof(x) != sizeof(long)); \
+ asm volatile ( "mrs %0, cpsr @ local_save_flags\n" \
+ : "=r" (x) :: "memory", "cc" ); \
+})
+#define local_irq_save(x) \
+({ \
+ local_save_flags(x); \
+ local_irq_disable(); \
+})
+#define local_irq_restore(x) \
+({ \
+ BUILD_BUG_ON(sizeof(x) != sizeof(long)); \
+ asm volatile ( \
+ "msr cpsr_c, %0 @ local_irq_restore\n" \
+ : \
+ : "r" (flags) \
+ : "memory", "cc"); \
+})
+
+static inline int local_irq_is_enabled(void)
+{
+ unsigned long flags;
+ local_save_flags(flags);
+ return !(flags & PSR_IRQ_MASK);
+}
+
+#define local_fiq_enable() __asm__("cpsie f @ __stf\n" : : : "memory", "cc")
+#define local_fiq_disable() __asm__("cpsid f @ __clf\n" : : : "memory", "cc")
+
+#define local_abort_enable() __asm__("cpsie a @ __sta\n" : : : "memory", "cc")
+#define local_abort_disable() __asm__("cpsid a @ __sta\n" : : : "memory", "cc")
+
+static inline int local_fiq_is_enabled(void)
+{
+ unsigned long flags;
+ local_save_flags(flags);
+ return !(flags & PSR_FIQ_MASK);
+}
+
#endif
/*
* Local variables:
diff --git a/xen/include/asm-arm/arm64/system.h
b/xen/include/asm-arm/arm64/system.h
index 6fd26f8..cc7b959 100644
--- a/xen/include/asm-arm/arm64/system.h
+++ b/xen/include/asm-arm/arm64/system.h
@@ -172,6 +172,60 @@ static inline unsigned long __cmpxchg_mb(volatile void
*ptr, unsigned long old,
(unsigned long)(n), \
sizeof(*(ptr))))
+/* Uses uimm4 as a bitmask to select the clearing of one or more of
+ * the DAIF exception mask bits:
+ * bit 3 selects the D mask,
+ * bit 2 the A mask,
+ * bit 1 the I mask and
+ * bit 0 the F mask.
+*/
+
+#define local_fiq_disable() asm volatile ( "msr daifset, #1\n" ::: "memory" )
+#define local_fiq_enable() asm volatile ( "msr daifclr, #1\n" ::: "memory" )
+#define local_irq_disable() asm volatile ( "msr daifset, #2\n" ::: "memory" )
+#define local_irq_enable() asm volatile ( "msr daifclr, #2\n" ::: "memory" )
+#define local_abort_disable() asm volatile ( "msr daifset, #4\n" ::: "memory" )
+#define local_abort_enable() asm volatile ( "msr daifclr, #4\n" ::: "memory" )
+
+#define local_save_flags(x) \
+({ \
+ BUILD_BUG_ON(sizeof(x) != sizeof(long)); \
+ asm volatile( \
+ "mrs %0, daif // local_save_flags\n" \
+ : "=r" (x) \
+ : \
+ : "memory"); \
+})
+
+#define local_irq_save(x) \
+({ \
+ local_save_flags(x); \
+ local_irq_disable(); \
+})
+#define local_irq_restore(x) \
+({ \
+ BUILD_BUG_ON(sizeof(x) != sizeof(long)); \
+ asm volatile ( \
+ "msr daif, %0 // local_irq_restore" \
+ : \
+ : "r" (flags) \
+ : "memory"); \
+})
+
+static inline int local_irq_is_enabled(void)
+{
+ unsigned long flags;
+ local_save_flags(flags);
+ return !(flags & PSR_IRQ_MASK);
+}
+
+static inline int local_fiq_is_enabled(void)
+{
+ unsigned long flags;
+ local_save_flags(flags);
+ return !(flags & PSR_FIQ_MASK);
+}
+
#endif
/*
* Local variables:
diff --git a/xen/include/asm-arm/system.h b/xen/include/asm-arm/system.h
index e4cb99c..a26936b 100644
--- a/xen/include/asm-arm/system.h
+++ b/xen/include/asm-arm/system.h
@@ -29,50 +29,6 @@
# error "unknown ARM variant"
#endif
-#define local_irq_disable() asm volatile ( "cpsid i @ local_irq_disable\n" : :
: "cc" )
-#define local_irq_enable() asm volatile ( "cpsie i @ local_irq_enable\n" : :
: "cc" )
-
-#define local_save_flags(x) \
-({ \
- BUILD_BUG_ON(sizeof(x) != sizeof(long)); \
- asm volatile ( "mrs %0, cpsr @ local_save_flags\n" \
- : "=r" (x) :: "memory", "cc" ); \
-})
-#define local_irq_save(x) \
-({ \
- local_save_flags(x); \
- local_irq_disable(); \
-})
-#define local_irq_restore(x) \
-({ \
- BUILD_BUG_ON(sizeof(x) != sizeof(long)); \
- asm volatile ( \
- "msr cpsr_c, %0 @ local_irq_restore\n" \
- : \
- : "r" (flags) \
- : "memory", "cc"); \
-})
-
-static inline int local_irq_is_enabled(void)
-{
- unsigned long flags;
- local_save_flags(flags);
- return !(flags & PSR_IRQ_MASK);
-}
-
-#define local_fiq_enable() __asm__("cpsie f @ __stf\n" : : : "memory", "cc")
-#define local_fiq_disable() __asm__("cpsid f @ __clf\n" : : : "memory", "cc")
-
-#define local_abort_enable() __asm__("cpsie a @ __sta\n" : : : "memory", "cc")
-#define local_abort_disable() __asm__("cpsid a @ __sta\n" : : : "memory", "cc")
-
-static inline int local_fiq_is_enabled(void)
-{
- unsigned long flags;
- local_save_flags(flags);
- return !!(flags & PSR_FIQ_MASK);
-}
-
extern struct vcpu *__context_switch(struct vcpu *prev, struct vcpu *next);
#endif
--
1.7.2.5
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