Blackfin: convert interrupt pipeline to irqflags
Philippe Gerum [Tue, 16 Jun 2009 03:25:37 +0000 (05:25 +0200)]
Signed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

arch/blackfin/include/asm/ipipe_base.h
arch/blackfin/include/asm/irq.h
arch/blackfin/include/asm/irqflags.h
arch/blackfin/include/asm/system.h
arch/blackfin/kernel/ipipe.c

index 3e8acbd..490098f 100644 (file)
 
 extern unsigned long __ipipe_root_status; /* Alias to ipipe_root_cpudom_var(status) */
 
-static inline void __ipipe_stall_root(void)
-{
-       volatile unsigned long *p = &__ipipe_root_status;
-       set_bit(0, p);
-}
+#define __ipipe_stall_root()                                           \
+       do {                                                            \
+               volatile unsigned long *p = &__ipipe_root_status;       \
+               set_bit(0, p);                                          \
+       } while (0)
 
-static inline unsigned long __ipipe_test_and_stall_root(void)
-{
-       volatile unsigned long *p = &__ipipe_root_status;
-       return test_and_set_bit(0, p);
-}
+#define __ipipe_test_and_stall_root()                                  \
+       ({                                                              \
+               volatile unsigned long *p = &__ipipe_root_status;       \
+               test_and_set_bit(0, p);                                 \
+       })
 
-static inline unsigned long __ipipe_test_root(void)
-{
-       const unsigned long *p = &__ipipe_root_status;
-       return test_bit(0, p);
-}
+#define __ipipe_test_root()                                    \
+       ({                                                      \
+               const unsigned long *p = &__ipipe_root_status;  \
+               test_bit(0, p);                                 \
+       })
 
 #endif /* !__ASSEMBLY__ */
 
index 9a7f63a..42a15f5 100644 (file)
 /* SYS_IRQS and NR_IRQS are defined in <mach-bf5xx/irq.h> */
 #include <mach/irq.h>
 
-/* Xenomai IPIPE helpers */
-#define local_irq_restore_hw(x) local_irq_restore(x)
-#define local_irq_save_hw(x)    local_irq_save(x)
-#define local_irq_enable_hw(x)  local_irq_enable(x)
-#define local_irq_disable_hw(x) local_irq_disable(x)
-#define irqs_disabled_hw(x)     irqs_disabled(x)
-
 #if ANOMALY_05000244 && defined(CONFIG_BFIN_ICACHE)
 # define NOP_PAD_ANOMALY_05000244 "nop; nop;"
 #else
index 139cba4..9b19a19 100644 (file)
@@ -31,6 +31,150 @@ static inline unsigned long bfin_cli(void)
        return flags;
 }
 
+#ifdef CONFIG_IPIPE
+
+#include <linux/ipipe_base.h>
+#include <linux/ipipe_trace.h>
+
+#ifdef CONFIG_DEBUG_HWERR
+# define bfin_no_irqs 0x3f
+#else
+# define bfin_no_irqs 0x1f
+#endif
+
+#define raw_local_irq_disable()                                \
+       do {                                            \
+               ipipe_check_context(ipipe_root_domain); \
+               __ipipe_stall_root();                   \
+               barrier();                              \
+       } while (0)
+
+static inline void raw_local_irq_enable(void)
+{
+       barrier();
+       ipipe_check_context(ipipe_root_domain);
+       __ipipe_unstall_root();
+}
+
+#define raw_local_save_flags_ptr(x)                                    \
+       do {                                                            \
+               *(x) = __ipipe_test_root() ? bfin_no_irqs : bfin_irq_flags; \
+       } while (0)
+
+#define raw_local_save_flags(x)                raw_local_save_flags_ptr(&(x))
+
+#define raw_irqs_disabled_flags(x)     ((x) == bfin_no_irqs)
+
+#define raw_local_irq_save_ptr(x)                                      \
+       do {                                                            \
+               *(x) = __ipipe_test_and_stall_root() ? bfin_no_irqs : bfin_irq_flags; \
+               barrier();                                              \
+       } while (0)
+
+#define raw_local_irq_save(x)                          \
+       do {                                            \
+               ipipe_check_context(ipipe_root_domain); \
+               raw_local_irq_save_ptr(&(x));           \
+       } while (0)
+
+static inline unsigned long raw_mangle_irq_bits(int virt, unsigned long real)
+{
+       /*
+        * Merge virtual and real interrupt mask bits into a single
+        * 32bit word.
+        */
+       return (real & ~(1 << 31)) | ((virt != 0) << 31);
+}
+
+static inline int raw_demangle_irq_bits(unsigned long *x)
+{
+       int virt = (*x & (1 << 31)) != 0;
+       *x &= ~(1L << 31);
+       return virt;
+}
+
+static inline void local_irq_disable_hw_notrace(void)
+{
+       bfin_cli();
+}
+
+static inline void local_irq_enable_hw_notrace(void)
+{
+       bfin_sti(bfin_irq_flags);
+}
+
+#define local_save_flags_hw(flags)                     \
+       do {                                            \
+               (flags) = bfin_read_IMASK();            \
+       } while (0)
+
+#define irqs_disabled_flags_hw(flags) (((flags) & ~0x3f) == 0)
+
+#define irqs_disabled_hw()                     \
+       ({                                      \
+       unsigned long flags;                    \
+       local_save_flags_hw(flags);             \
+       irqs_disabled_flags_hw(flags);          \
+       })
+
+static inline void local_irq_save_ptr_hw(unsigned long *flags)
+{
+       *flags = bfin_cli();
+#ifdef CONFIG_DEBUG_HWERR
+       bfin_sti(0x3f);
+#endif
+}
+
+#define local_irq_save_hw_notrace(flags)               \
+       do {                                            \
+               local_irq_save_ptr_hw(&(flags));        \
+       } while (0)
+
+static inline void local_irq_restore_hw_notrace(unsigned long flags)
+{
+       if (!irqs_disabled_flags_hw(flags))
+               local_irq_enable_hw_notrace();
+}
+
+#ifdef CONFIG_IPIPE_TRACE_IRQSOFF
+# define local_irq_disable_hw()                                \
+       do {                                            \
+               if (!irqs_disabled_hw()) {              \
+                       local_irq_disable_hw_notrace(); \
+                       ipipe_trace_begin(0x80000000);  \
+               }                                       \
+       } while (0)
+# define local_irq_enable_hw()                         \
+       do {                                            \
+               if (irqs_disabled_hw()) {               \
+                       ipipe_trace_end(0x80000000);    \
+                       local_irq_enable_hw_notrace();  \
+               }                                       \
+       } while (0)
+# define local_irq_save_hw(flags)                      \
+       do {                                            \
+               local_save_flags_hw(flags);             \
+               if (!irqs_disabled_flags_hw(flags)) {   \
+                       local_irq_disable_hw_notrace(); \
+                       ipipe_trace_begin(0x80000001);  \
+               }                                       \
+       } while (0)
+# define local_irq_restore_hw(flags)                   \
+       do {                                            \
+               if (!irqs_disabled_flags_hw(flags)) {   \
+                       ipipe_trace_end(0x80000001);    \
+                       local_irq_enable_hw_notrace();  \
+               }                                       \
+       } while (0)
+#else /* !CONFIG_IPIPE_TRACE_IRQSOFF */
+# define local_irq_disable_hw()                local_irq_disable_hw_notrace()
+# define local_irq_enable_hw()         local_irq_enable_hw_notrace()
+# define local_irq_save_hw(flags)      local_irq_save_hw_notrace(flags)
+# define local_irq_restore_hw(flags)   local_irq_restore_hw_notrace(flags)
+#endif /* !CONFIG_IPIPE_TRACE_IRQSOFF */
+
+#else /* CONFIG_IPIPE */
+
 static inline void raw_local_irq_disable(void)
 {
        bfin_cli();
@@ -44,12 +188,6 @@ static inline void raw_local_irq_enable(void)
 
 #define raw_irqs_disabled_flags(flags) (((flags) & ~0x3f) == 0)
 
-static inline void raw_local_irq_restore(unsigned long flags)
-{
-       if (!raw_irqs_disabled_flags(flags))
-               raw_local_irq_enable();
-}
-
 static inline unsigned long __raw_local_irq_save(void)
 {
        unsigned long flags = bfin_cli();
@@ -60,4 +198,18 @@ static inline unsigned long __raw_local_irq_save(void)
 }
 #define raw_local_irq_save(flags) do { (flags) = __raw_local_irq_save(); } while (0)
 
+#define local_irq_save_hw(flags)       raw_local_irq_save(flags)
+#define local_irq_restore_hw(flags)    raw_local_irq_restore(flags)
+#define local_irq_enable_hw()          raw_local_irq_enable()
+#define local_irq_disable_hw()         raw_local_irq_disable()
+#define irqs_disabled_hw()             irqs_disabled()
+
+#endif /* !CONFIG_IPIPE */
+
+static inline void raw_local_irq_restore(unsigned long flags)
+{
+       if (!raw_irqs_disabled_flags(flags))
+               raw_local_irq_enable();
+}
+
 #endif
index 294dbda..85e8f16 100644 (file)
@@ -135,11 +135,13 @@ struct __xchg_dummy {
 };
 #define __xg(x) ((volatile struct __xchg_dummy *)(x))
 
+#include <mach/blackfin.h>
+
 static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
                                   int size)
 {
        unsigned long tmp = 0;
-       unsigned long flags = 0;
+       unsigned long flags;
 
        local_irq_save_hw(flags);
 
index d8cde1f..2b979ed 100644 (file)
@@ -52,7 +52,7 @@ EXPORT_SYMBOL(__ipipe_freq_scale);
 
 atomic_t __ipipe_irq_lvdepth[IVG15 + 1];
 
-unsigned long __ipipe_irq_lvmask = __all_masked_irq_flags;
+unsigned long __ipipe_irq_lvmask = bfin_no_irqs;
 EXPORT_SYMBOL(__ipipe_irq_lvmask);
 
 static void __ipipe_ack_irq(unsigned irq, struct irq_desc *desc)