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/*
* interface to Blackfin CEC
*
* Copyright 2009 Analog Devices Inc.
* Licensed under the GPL-2 or later.
*/
#ifndef __ASM_BFIN_IRQFLAGS_H__
#define __ASM_BFIN_IRQFLAGS_H__
#ifdef CONFIG_SMP
# include <asm/pda.h>
# include <asm/processor.h>
/* Forward decl needed due to cdef inter dependencies */
static inline uint32_t __pure bfin_dspid(void);
# define blackfin_core_id() (bfin_dspid() & 0xff)
# define bfin_irq_flags cpu_pda[blackfin_core_id()].imask
#else
extern unsigned long bfin_irq_flags;
#endif
static inline void bfin_sti(unsigned long flags)
{
asm volatile("sti %0;" : : "d" (flags));
}
static inline unsigned long bfin_cli(void)
{
unsigned long flags;
asm volatile("cli %0;" : "=d" (flags));
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();
}
static inline void raw_local_irq_enable(void)
{
bfin_sti(bfin_irq_flags);
}
#define raw_local_save_flags(flags) do { (flags) = bfin_read_IMASK(); } while (0)
#define raw_irqs_disabled_flags(flags) (((flags) & ~0x3f) == 0)
static inline unsigned long __raw_local_irq_save(void)
{
unsigned long flags = bfin_cli();
#ifdef CONFIG_DEBUG_HWERR
bfin_sti(0x3f);
#endif
return flags;
}
#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
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