arch/blackfin/include/asm/ipipe.h - maze/linux - Git at Google

 /*   -*- linux-c -*-
  *   include/asm-blackfin/ipipe.h
  *
  *   Copyright (C) 2002-2007 Philippe Gerum.
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
  *   the Free Software Foundation, Inc., 675 Mass Ave, Cambridge MA 02139,
  *   USA; either version 2 of the License, or (at your option) any later
  *   version.
  *
  *   This program is distributed in the hope that it will be useful,
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
  *   You should have received a copy of the GNU General Public License
  *   along with this program; if not, write to the Free Software
  *   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  */

 #ifndef __ASM_BLACKFIN_IPIPE_H
 #define __ASM_BLACKFIN_IPIPE_H

 #ifdef CONFIG_IPIPE

 #include <linux/cpumask.h>
 #include <linux/list.h>
 #include <linux/threads.h>
 #include <linux/irq.h>
 #include <linux/ipipe_percpu.h>
 #include <asm/ptrace.h>
 #include <asm/irq.h>
 #include <asm/bitops.h>
 #include <asm/atomic.h>
 #include <asm/traps.h>

 #define IPIPE_ARCH_STRING     "1.12-00"
 #define IPIPE_MAJOR_NUMBER    1
 #define IPIPE_MINOR_NUMBER    12
 #define IPIPE_PATCH_NUMBER    0

 #ifdef CONFIG_SMP
 #error "I-pipe/blackfin: SMP not implemented"
 #else /* !CONFIG_SMP */
 #define ipipe_processor_id()	0
 #endif	/* CONFIG_SMP */

 #define prepare_arch_switch(next)		\
 do {						\
 	ipipe_schedule_notify(current, next);	\
 	hard_local_irq_disable();			\
 } while (0)

 #define task_hijacked(p)						\
 	({								\
 		int __x__ = __ipipe_root_domain_p;			\
 		__clear_bit(IPIPE_SYNC_FLAG, &ipipe_root_cpudom_var(status)); \
 		if (__x__)						\
 			hard_local_irq_enable();				\
 		!__x__;							\
 	})

 struct ipipe_domain;

 struct ipipe_sysinfo {

 	int ncpus;		/* Number of CPUs on board */
 	u64 cpufreq;		/* CPU frequency (in Hz) */

 	/* Arch-dependent block */

 	struct {
 		unsigned tmirq;	/* Timer tick IRQ */
 		u64 tmfreq;	/* Timer frequency */
 	} archdep;
 };

 #define ipipe_read_tsc(t)					\
 	({							\
 	unsigned long __cy2;					\
 	__asm__ __volatile__ ("1: %0 = CYCLES2\n"		\
 				"%1 = CYCLES\n"			\
 				"%2 = CYCLES2\n"		\
 				"CC = %2 == %0\n"		\
 				"if ! CC jump 1b\n"		\
 				: "=d,a" (((unsigned long *)&t)[1]),	\
 				  "=d,a" (((unsigned long *)&t)[0]),	\
 				  "=d,a" (__cy2)				\
 				: /*no input*/ : "CC");			\
 	t;								\
 	})

 #define ipipe_cpu_freq()	__ipipe_core_clock
 #define ipipe_tsc2ns(_t)	(((unsigned long)(_t)) * __ipipe_freq_scale)
 #define ipipe_tsc2us(_t)	(ipipe_tsc2ns(_t) / 1000 + 1)

 /* Private interface -- Internal use only */

 #define __ipipe_check_platform()	do { } while (0)

 #define __ipipe_init_platform()		do { } while (0)

 extern atomic_t __ipipe_irq_lvdepth[IVG15 + 1];

 extern unsigned long __ipipe_irq_lvmask;

 extern struct ipipe_domain ipipe_root;

 /* enable/disable_irqdesc _must_ be used in pairs. */

 void __ipipe_enable_irqdesc(struct ipipe_domain *ipd,
 			    unsigned irq);

 void __ipipe_disable_irqdesc(struct ipipe_domain *ipd,
 			     unsigned irq);

 #define __ipipe_enable_irq(irq)		(irq_desc[irq].chip->unmask(irq))

 #define __ipipe_disable_irq(irq)	(irq_desc[irq].chip->mask(irq))

 static inline int __ipipe_check_tickdev(const char *devname)
 {
 	return 1;
 }

 void __ipipe_enable_pipeline(void);

 #define __ipipe_hook_critical_ipi(ipd) do { } while (0)

 #define __ipipe_sync_pipeline  ___ipipe_sync_pipeline
 void ___ipipe_sync_pipeline(unsigned long syncmask);

 void __ipipe_handle_irq(unsigned irq, struct pt_regs *regs);

 int __ipipe_get_irq_priority(unsigned irq);

 void __ipipe_serial_debug(const char *fmt, ...);

 asmlinkage void __ipipe_call_irqtail(unsigned long addr);

 DECLARE_PER_CPU(struct pt_regs, __ipipe_tick_regs);

 extern unsigned long __ipipe_core_clock;

 extern unsigned long __ipipe_freq_scale;

 extern unsigned long __ipipe_irq_tail_hook;

 static inline unsigned long __ipipe_ffnz(unsigned long ul)
 {
 	return ffs(ul) - 1;
 }

 #define __ipipe_run_irqtail()  /* Must be a macro */			\
 	do {								\
 		unsigned long __pending;				\
 		CSYNC();						\
 		__pending = bfin_read_IPEND();				\
 		if (__pending & 0x8000) {				\
 			__pending &= ~0x8010;				\
 			if (__pending && (__pending & (__pending - 1)) == 0) \
 				__ipipe_call_irqtail(__ipipe_irq_tail_hook); \
 		}							\
 	} while (0)

 #define __ipipe_run_isr(ipd, irq)					\
 	do {								\
 		if (!__ipipe_pipeline_head_p(ipd))			\
 			hard_local_irq_enable();				\
 		if (ipd == ipipe_root_domain) {				\
 			if (unlikely(ipipe_virtual_irq_p(irq))) {	\
 				irq_enter();				\
 				ipd->irqs[irq].handler(irq, ipd->irqs[irq].cookie); \
 				irq_exit();				\
 			} else 						\
 				ipd->irqs[irq].handler(irq, &__raw_get_cpu_var(__ipipe_tick_regs)); \
 		} else {						\
 			__clear_bit(IPIPE_SYNC_FLAG, &ipipe_cpudom_var(ipd, status)); \
 			ipd->irqs[irq].handler(irq, ipd->irqs[irq].cookie); \
 			/* Attempt to exit the outer interrupt level before \
 			 * starting the deferred IRQ processing. */	\
 			__ipipe_run_irqtail();				\
 			__set_bit(IPIPE_SYNC_FLAG, &ipipe_cpudom_var(ipd, status)); \
 		}							\
 		hard_local_irq_disable();					\
 	} while (0)

 #define __ipipe_syscall_watched_p(p, sc)	\
 	(((p)->flags & PF_EVNOTIFY) || (unsigned long)sc >= NR_syscalls)

 void ipipe_init_irq_threads(void);

 int ipipe_start_irq_thread(unsigned irq, struct irq_desc *desc);

 #ifdef CONFIG_TICKSOURCE_CORETMR
 #define IRQ_SYSTMR		IRQ_CORETMR
 #define IRQ_PRIOTMR		IRQ_CORETMR
 #else
 #define IRQ_SYSTMR		IRQ_TIMER0
 #define IRQ_PRIOTMR		CONFIG_IRQ_TIMER0
 #endif

 #ifdef CONFIG_BF561
 #define bfin_write_TIMER_DISABLE(val)	bfin_write_TMRS8_DISABLE(val)
 #define bfin_write_TIMER_ENABLE(val)	bfin_write_TMRS8_ENABLE(val)
 #define bfin_write_TIMER_STATUS(val)	bfin_write_TMRS8_STATUS(val)
 #define bfin_read_TIMER_STATUS()	bfin_read_TMRS8_STATUS()
 #elif defined(CONFIG_BF54x)
 #define bfin_write_TIMER_DISABLE(val)	bfin_write_TIMER_DISABLE0(val)
 #define bfin_write_TIMER_ENABLE(val)	bfin_write_TIMER_ENABLE0(val)
 #define bfin_write_TIMER_STATUS(val)	bfin_write_TIMER_STATUS0(val)
 #define bfin_read_TIMER_STATUS(val)	bfin_read_TIMER_STATUS0(val)
 #endif

 #define __ipipe_root_tick_p(regs)	((regs->ipend & 0x10) != 0)

 #else /* !CONFIG_IPIPE */

 #define task_hijacked(p)		0
 #define ipipe_trap_notify(t, r)  	0

 #define ipipe_init_irq_threads()		do { } while (0)
 #define ipipe_start_irq_thread(irq, desc)	0

 #ifndef CONFIG_TICKSOURCE_GPTMR0
 #define IRQ_SYSTMR		IRQ_CORETMR
 #define IRQ_PRIOTMR		IRQ_CORETMR
 #else
 #define IRQ_SYSTMR		IRQ_TIMER0
 #define IRQ_PRIOTMR		CONFIG_IRQ_TIMER0
 #endif

 #define __ipipe_root_tick_p(regs)	1

 #endif /* !CONFIG_IPIPE */

 #define ipipe_update_tick_evtdev(evtdev)	do { } while (0)

 #endif	/* !__ASM_BLACKFIN_IPIPE_H */
	/* -- linux-c --
	* include/asm-blackfin/ipipe.h
	*
	* Copyright (C) 2002-2007 Philippe Gerum.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation, Inc., 675 Mass Ave, Cambridge MA 02139,
	* USA; either version 2 of the License, or (at your option) any later
	* version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	*/

	#ifndef __ASM_BLACKFIN_IPIPE_H
	#define __ASM_BLACKFIN_IPIPE_H

	#ifdef CONFIG_IPIPE

	#include <linux/cpumask.h>
	#include <linux/list.h>
	#include <linux/threads.h>
	#include <linux/irq.h>
	#include <linux/ipipe_percpu.h>
	#include <asm/ptrace.h>
	#include <asm/irq.h>
	#include <asm/bitops.h>
	#include <asm/atomic.h>
	#include <asm/traps.h>

	#define IPIPE_ARCH_STRING "1.12-00"
	#define IPIPE_MAJOR_NUMBER 1
	#define IPIPE_MINOR_NUMBER 12
	#define IPIPE_PATCH_NUMBER 0

	#ifdef CONFIG_SMP
	#error "I-pipe/blackfin: SMP not implemented"
	#else /* !CONFIG_SMP */
	#define ipipe_processor_id() 0
	#endif /* CONFIG_SMP */

	#define prepare_arch_switch(next) \
	do { \
	ipipe_schedule_notify(current, next); \
	hard_local_irq_disable(); \
	} while (0)

	#define task_hijacked(p) \
	({ \
	int __x__ = __ipipe_root_domain_p; \
	__clear_bit(IPIPE_SYNC_FLAG, &ipipe_root_cpudom_var(status)); \
	if (__x__) \
	hard_local_irq_enable(); \
	!__x__; \
	})

	struct ipipe_domain;

	struct ipipe_sysinfo {

	int ncpus; /* Number of CPUs on board */
	u64 cpufreq; /* CPU frequency (in Hz) */

	/* Arch-dependent block */

	struct {
	unsigned tmirq; /* Timer tick IRQ */
	u64 tmfreq; /* Timer frequency */
	} archdep;
	};

	#define ipipe_read_tsc(t) \
	({ \
	unsigned long __cy2; \
	__asm__ __volatile__ ("1: %0 = CYCLES2\n" \
	"%1 = CYCLES\n" \
	"%2 = CYCLES2\n" \
	"CC = %2 == %0\n" \
	"if ! CC jump 1b\n" \
	: "=d,a" (((unsigned long *)&t)[1]), \
	"=d,a" (((unsigned long *)&t)[0]), \
	"=d,a" (__cy2) \
	: /no input/ : "CC"); \
	t; \
	})

	#define ipipe_cpu_freq() __ipipe_core_clock
	#define ipipe_tsc2ns(_t) (((unsigned long)(_t)) * __ipipe_freq_scale)
	#define ipipe_tsc2us(_t) (ipipe_tsc2ns(_t) / 1000 + 1)

	/* Private interface -- Internal use only */

	#define __ipipe_check_platform() do { } while (0)

	#define __ipipe_init_platform() do { } while (0)

	extern atomic_t __ipipe_irq_lvdepth[IVG15 + 1];

	extern unsigned long __ipipe_irq_lvmask;

	extern struct ipipe_domain ipipe_root;

	/* enable/disable_irqdesc _must_ be used in pairs. */

	void __ipipe_enable_irqdesc(struct ipipe_domain *ipd,
	unsigned irq);

	void __ipipe_disable_irqdesc(struct ipipe_domain *ipd,
	unsigned irq);

	#define __ipipe_enable_irq(irq) (irq_desc[irq].chip->unmask(irq))

	#define __ipipe_disable_irq(irq) (irq_desc[irq].chip->mask(irq))

	static inline int __ipipe_check_tickdev(const char *devname)
	{
	return 1;
	}

	void __ipipe_enable_pipeline(void);

	#define __ipipe_hook_critical_ipi(ipd) do { } while (0)

	#define __ipipe_sync_pipeline ___ipipe_sync_pipeline
	void ___ipipe_sync_pipeline(unsigned long syncmask);

	void __ipipe_handle_irq(unsigned irq, struct pt_regs *regs);

	int __ipipe_get_irq_priority(unsigned irq);

	void __ipipe_serial_debug(const char *fmt, ...);

	asmlinkage void __ipipe_call_irqtail(unsigned long addr);

	DECLARE_PER_CPU(struct pt_regs, __ipipe_tick_regs);

	extern unsigned long __ipipe_core_clock;

	extern unsigned long __ipipe_freq_scale;

	extern unsigned long __ipipe_irq_tail_hook;

	static inline unsigned long __ipipe_ffnz(unsigned long ul)
	{
	return ffs(ul) - 1;
	}

	#define __ipipe_run_irqtail() /* Must be a macro */ \
	do { \
	unsigned long __pending; \
	CSYNC(); \
	__pending = bfin_read_IPEND(); \
	if (__pending & 0x8000) { \
	__pending &= ~0x8010; \
	if (__pending && (__pending & (__pending - 1)) == 0) \
	__ipipe_call_irqtail(__ipipe_irq_tail_hook); \
	} \
	} while (0)

	#define __ipipe_run_isr(ipd, irq) \
	do { \
	if (!__ipipe_pipeline_head_p(ipd)) \
	hard_local_irq_enable(); \
	if (ipd == ipipe_root_domain) { \
	if (unlikely(ipipe_virtual_irq_p(irq))) { \
	irq_enter(); \
	ipd->irqs[irq].handler(irq, ipd->irqs[irq].cookie); \
	irq_exit(); \
	} else \
	ipd->irqs[irq].handler(irq, &__raw_get_cpu_var(__ipipe_tick_regs)); \
	} else { \
	__clear_bit(IPIPE_SYNC_FLAG, &ipipe_cpudom_var(ipd, status)); \
	ipd->irqs[irq].handler(irq, ipd->irqs[irq].cookie); \
	/* Attempt to exit the outer interrupt level before \
	* starting the deferred IRQ processing. */ \
	__ipipe_run_irqtail(); \
	__set_bit(IPIPE_SYNC_FLAG, &ipipe_cpudom_var(ipd, status)); \
	} \
	hard_local_irq_disable(); \
	} while (0)

	#define __ipipe_syscall_watched_p(p, sc) \
	(((p)->flags & PF_EVNOTIFY) \|\| (unsigned long)sc >= NR_syscalls)

	void ipipe_init_irq_threads(void);

	int ipipe_start_irq_thread(unsigned irq, struct irq_desc *desc);

	#ifdef CONFIG_TICKSOURCE_CORETMR
	#define IRQ_SYSTMR IRQ_CORETMR
	#define IRQ_PRIOTMR IRQ_CORETMR
	#else
	#define IRQ_SYSTMR IRQ_TIMER0
	#define IRQ_PRIOTMR CONFIG_IRQ_TIMER0
	#endif

	#ifdef CONFIG_BF561
	#define bfin_write_TIMER_DISABLE(val) bfin_write_TMRS8_DISABLE(val)
	#define bfin_write_TIMER_ENABLE(val) bfin_write_TMRS8_ENABLE(val)
	#define bfin_write_TIMER_STATUS(val) bfin_write_TMRS8_STATUS(val)
	#define bfin_read_TIMER_STATUS() bfin_read_TMRS8_STATUS()
	#elif defined(CONFIG_BF54x)
	#define bfin_write_TIMER_DISABLE(val) bfin_write_TIMER_DISABLE0(val)
	#define bfin_write_TIMER_ENABLE(val) bfin_write_TIMER_ENABLE0(val)
	#define bfin_write_TIMER_STATUS(val) bfin_write_TIMER_STATUS0(val)
	#define bfin_read_TIMER_STATUS(val) bfin_read_TIMER_STATUS0(val)
	#endif

	#define __ipipe_root_tick_p(regs) ((regs->ipend & 0x10) != 0)

	#else /* !CONFIG_IPIPE */

	#define task_hijacked(p) 0
	#define ipipe_trap_notify(t, r) 0

	#define ipipe_init_irq_threads() do { } while (0)
	#define ipipe_start_irq_thread(irq, desc) 0

	#ifndef CONFIG_TICKSOURCE_GPTMR0
	#define IRQ_SYSTMR IRQ_CORETMR
	#define IRQ_PRIOTMR IRQ_CORETMR
	#else
	#define IRQ_SYSTMR IRQ_TIMER0
	#define IRQ_PRIOTMR CONFIG_IRQ_TIMER0
	#endif

	#define __ipipe_root_tick_p(regs) 1

	#endif /* !CONFIG_IPIPE */

	#define ipipe_update_tick_evtdev(evtdev) do { } while (0)

	#endif /* !__ASM_BLACKFIN_IPIPE_H */