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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__

#include <mach/blackfin.h>

#ifdef CONFIG_SMP
# include <asm/pda.h>
# include <asm/processor.h>
# define bfin_irq_flags cpu_pda[blackfin_core_id()].imask
#else
extern unsigned long bfin_irq_flags;
#endif

static inline notrace void bfin_sti(unsigned long flags)
{
	asm volatile("sti %0;" : : "d" (flags));
}

static inline notrace unsigned long bfin_cli(void)
{
	unsigned long flags;
	asm volatile("cli %0;" : "=d" (flags));
	return flags;
}

#ifdef CONFIG_DEBUG_HWERR
# define bfin_no_irqs 0x3f
#else
# define bfin_no_irqs 0x1f
#endif

/*****************************************************************************/
/*
 * Hard, untraced CPU interrupt flag manipulation and access.
 */
static inline notrace void __hard_local_irq_disable(void)
{
	bfin_cli();
}

static inline notrace void __hard_local_irq_enable(void)
{
	bfin_sti(bfin_irq_flags);
}

static inline notrace unsigned long hard_local_save_flags(void)
{
	return bfin_read_IMASK();
}

static inline notrace unsigned long __hard_local_irq_save(void)
{
	unsigned long flags;
	flags = bfin_cli();
#ifdef CONFIG_DEBUG_HWERR
	bfin_sti(0x3f);
#endif
	return flags;
}

static inline notrace int hard_irqs_disabled_flags(unsigned long flags)
{
#ifdef CONFIG_BF60x
	return (flags & IMASK_IVG11) == 0;
#else
	return (flags & ~0x3f) == 0;
#endif
}

static inline notrace int hard_irqs_disabled(void)
{
	unsigned long flags = hard_local_save_flags();
	return hard_irqs_disabled_flags(flags);
}

static inline notrace void __hard_local_irq_restore(unsigned long flags)
{
	if (!hard_irqs_disabled_flags(flags))
		__hard_local_irq_enable();
}

/*****************************************************************************/
/*
 * Interrupt pipe handling.
 */
#ifdef CONFIG_IPIPE

#include <linux/compiler.h>
#include <linux/ipipe_trace.h>
/*
 * Way too many inter-deps between low-level headers in this port, so
 * we redeclare the required bits we cannot pick from
 * <asm/ipipe_base.h> to prevent circular dependencies.
 */
void __ipipe_stall_root(void);
void __ipipe_unstall_root(void);
unsigned long __ipipe_test_root(void);
unsigned long __ipipe_test_and_stall_root(void);
void __ipipe_restore_root(unsigned long flags);

#ifdef CONFIG_IPIPE_DEBUG_CONTEXT
struct ipipe_domain;
extern struct ipipe_domain ipipe_root;
void ipipe_check_context(struct ipipe_domain *ipd);
#define __check_irqop_context(ipd)  ipipe_check_context(&ipipe_root)
#else /* !CONFIG_IPIPE_DEBUG_CONTEXT */
#define __check_irqop_context(ipd)  do { } while (0)
#endif /* !CONFIG_IPIPE_DEBUG_CONTEXT */

/*
 * Interrupt pipe interface to linux/irqflags.h.
 */
static inline notrace void arch_local_irq_disable(void)
{
	__check_irqop_context();
	__ipipe_stall_root();
	barrier();
}

static inline notrace void arch_local_irq_enable(void)
{
	barrier();
	__check_irqop_context();
	__ipipe_unstall_root();
}

static inline notrace unsigned long arch_local_save_flags(void)
{
	return __ipipe_test_root() ? bfin_no_irqs : bfin_irq_flags;
}

static inline notrace int arch_irqs_disabled_flags(unsigned long flags)
{
	return flags == bfin_no_irqs;
}

static inline notrace unsigned long arch_local_irq_save(void)
{
	unsigned long flags;

	__check_irqop_context();
	flags = __ipipe_test_and_stall_root() ? bfin_no_irqs : bfin_irq_flags;
	barrier();

	return flags;
}

static inline notrace void arch_local_irq_restore(unsigned long flags)
{
	__check_irqop_context();
	__ipipe_restore_root(flags == bfin_no_irqs);
}

static inline notrace unsigned long arch_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 notrace int arch_demangle_irq_bits(unsigned long *x)
{
	int virt = (*x & (1 << 31)) != 0;
	*x &= ~(1L << 31);
	return virt;
}

/*
 * Interface to various arch routines that may be traced.
 */
#ifdef CONFIG_IPIPE_TRACE_IRQSOFF
static inline notrace void hard_local_irq_disable(void)
{
	if (!hard_irqs_disabled()) {
		__hard_local_irq_disable();
		ipipe_trace_begin(0x80000000);
	}
}

static inline notrace void hard_local_irq_enable(void)
{
	if (hard_irqs_disabled()) {
		ipipe_trace_end(0x80000000);
		__hard_local_irq_enable();
	}
}

static inline notrace unsigned long hard_local_irq_save(void)
{
	unsigned long flags = hard_local_save_flags();
	if (!hard_irqs_disabled_flags(flags)) {
		__hard_local_irq_disable();
		ipipe_trace_begin(0x80000001);
	}
	return flags;
}

static inline notrace void hard_local_irq_restore(unsigned long flags)
{
	if (!hard_irqs_disabled_flags(flags)) {
		ipipe_trace_end(0x80000001);
		__hard_local_irq_enable();
	}
}

#else /* !CONFIG_IPIPE_TRACE_IRQSOFF */
# define hard_local_irq_disable()	__hard_local_irq_disable()
# define hard_local_irq_enable()	__hard_local_irq_enable()
# define hard_local_irq_save()		__hard_local_irq_save()
# define hard_local_irq_restore(flags)	__hard_local_irq_restore(flags)
#endif /* !CONFIG_IPIPE_TRACE_IRQSOFF */

#define hard_local_irq_save_cond()		hard_local_irq_save()
#define hard_local_irq_restore_cond(flags)	hard_local_irq_restore(flags)

#else /* !CONFIG_IPIPE */

/*
 * Direct interface to linux/irqflags.h.
 */
#define arch_local_save_flags()		hard_local_save_flags()
#define arch_local_irq_save()		__hard_local_irq_save()
#define arch_local_irq_restore(flags)	__hard_local_irq_restore(flags)
#define arch_local_irq_enable()		__hard_local_irq_enable()
#define arch_local_irq_disable()	__hard_local_irq_disable()
#define arch_irqs_disabled_flags(flags)	hard_irqs_disabled_flags(flags)
#define arch_irqs_disabled()		hard_irqs_disabled()

/*
 * Interface to various arch routines that may be traced.
 */
#define hard_local_irq_save()		__hard_local_irq_save()
#define hard_local_irq_restore(flags)	__hard_local_irq_restore(flags)
#define hard_local_irq_enable()		__hard_local_irq_enable()
#define hard_local_irq_disable()	__hard_local_irq_disable()
#define hard_local_irq_save_cond()		hard_local_save_flags()
#define hard_local_irq_restore_cond(flags)	do { (void)(flags); } while (0)

#endif /* !CONFIG_IPIPE */

#ifdef CONFIG_SMP
#define hard_local_irq_save_smp()		hard_local_irq_save()
#define hard_local_irq_restore_smp(flags)	hard_local_irq_restore(flags)
#else
#define hard_local_irq_save_smp()		hard_local_save_flags()
#define hard_local_irq_restore_smp(flags)	do { (void)(flags); } while (0)
#endif

/*
 * Remap the arch-neutral IRQ state manipulation macros to the
 * blackfin-specific hard_local_irq_* API.
 */
#define local_irq_save_hw(flags)			\
	do {						\
		(flags) = hard_local_irq_save();	\
	} while (0)
#define local_irq_restore_hw(flags)		\
	do {					\
		hard_local_irq_restore(flags);	\
	} while (0)
#define local_irq_disable_hw()			\
	do {					\
		hard_local_irq_disable();	\
	} while (0)
#define local_irq_enable_hw()			\
	do {					\
		hard_local_irq_enable();	\
	} while (0)
#define local_irq_save_hw_notrace(flags)		\
	do {						\
		(flags) = __hard_local_irq_save();	\
	} while (0)
#define local_irq_restore_hw_notrace(flags)		\
	do {						\
		__hard_local_irq_restore(flags);	\
	} while (0)

#define irqs_disabled_hw()	hard_irqs_disabled()

#endif

Filemanager

Name Type Size Permission Actions
Kbuild File 658 B 0644
asm-offsets.h File 35 B 0644
atomic.h File 1.55 KB 0644
barrier.h File 2.55 KB 0644
bfin-global.h File 2.8 KB 0644
bfin-lq035q1.h File 868 B 0644
bfin5xx_spi.h File 2.07 KB 0644
bfin_can.h File 36.04 KB 0644
bfin_dma.h File 5.46 KB 0644
bfin_pfmon.h File 1.11 KB 0644
bfin_ppi.h File 9.01 KB 0644
bfin_sdh.h File 7.2 KB 0644
bfin_serial.h File 17.02 KB 0644
bfin_simple_timer.h File 949 B 0644
bfin_sport.h File 1.21 KB 0644
bfin_sport3.h File 5.47 KB 0644
bfin_twi.h File 6.25 KB 0644
bfin_watchdog.h File 696 B 0644
bfrom.h File 3.36 KB 0644
bitops.h File 3.45 KB 0644
blackfin.h File 1.55 KB 0644
bug.h File 1.49 KB 0644
cache.h File 1.47 KB 0644
cacheflush.h File 3.79 KB 0644
cdef_LPBlackfin.h File 18.93 KB 0644
checksum.h File 899 B 0644
clkdev.h File 318 B 0644
clocks.h File 1.66 KB 0644
cmpxchg.h File 3.2 KB 0644
context.S File 5.92 KB 0644
cplb.h File 4.86 KB 0644
cplbinit.h File 1.6 KB 0644
cpu.h File 443 B 0644
def_LPBlackfin.h File 28.6 KB 0644
delay.h File 917 B 0644
dma-mapping.h File 1.09 KB 0644
dma.h File 9.28 KB 0644
dpmc.h File 18.24 KB 0644
early_printk.h File 1.09 KB 0644
elf.h File 4.88 KB 0644
entry.h File 5.27 KB 0644
exec.h File 37 B 0644
fixed_code.h File 806 B 0644
flat.h File 1.41 KB 0644
ftrace.h File 1.37 KB 0644
gpio.h File 5.91 KB 0644
gptimers.h File 8.95 KB 0644
hardirq.h File 301 B 0644
io.h File 1.52 KB 0644
ipipe.h File 5.81 KB 0644
ipipe_base.h File 2.38 KB 0644
irq.h File 879 B 0644
irq_handler.h File 1.93 KB 0644
irqflags.h File 7.13 KB 0644
kgdb.h File 3.23 KB 0644
l1layout.h File 879 B 0644
linkage.h File 205 B 0644
mem_init.h File 13.1 KB 0644
mem_map.h File 1.73 KB 0644
mmu.h File 713 B 0644
mmu_context.h File 5.35 KB 0644
module.h File 410 B 0644
nand.h File 895 B 0644
nmi.h File 195 B 0644
page.h File 546 B 0644
page_offset.h File 192 B 0644
pci.h File 310 B 0644
pda.h File 1.86 KB 0644
perf_event.h File 23 B 0644
pgtable.h File 3 KB 0644
pm.h File 590 B 0644
portmux.h File 16.38 KB 0644
processor.h File 3.21 KB 0644
pseudo_instructions.h File 391 B 0644
ptrace.h File 1.19 KB 0644
reboot.h File 446 B 0644
rwlock.h File 142 B 0644
scb.h File 445 B 0644
sections.h File 2 KB 0644
segment.h File 226 B 0644
smp.h File 1.34 KB 0644
spinlock.h File 1.87 KB 0644
spinlock_types.h File 495 B 0644
string.h File 1.04 KB 0644
switch_to.h File 997 B 0644
syscall.h File 2.15 KB 0644
thread_info.h File 2.66 KB 0644
time.h File 1.33 KB 0644
timex.h File 477 B 0644
tlb.h File 481 B 0644
tlbflush.h File 88 B 0644
trace.h File 2.67 KB 0644
traps.h File 4.87 KB 0644
uaccess.h File 5.79 KB 0644
unistd.h File 523 B 0644
vga.h File 29 B 0644