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Blackfin: convert interrupt pipeline to irqflags 

Signed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Philippe Gerum 2009-06-16 05:25:37 +02:00 committed by Mike Frysinger
parent 3d15f302d0
commit 06ecc190f3
5 changed files with 177 additions and 30 deletions
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30
arch/blackfin/include/asm/ipipe_base.h
View File

@ -51,23 +51,23 @@
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__ */

7
arch/blackfin/include/asm/irq.h
View File

@ -22,13 +22,6 @@
/* 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

164
arch/blackfin/include/asm/irqflags.h
View 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

4
arch/blackfin/include/asm/system.h
View 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);

2
arch/blackfin/kernel/ipipe.c
View 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)