/* -*- 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 <linux/atomic.h>
#include <asm/traps.h>
#include <asm/bitsperlong.h>

#define IPIPE_ARCH_STRING "1.16-01"
#define IPIPE_MAJOR_NUMBER 1
#define IPIPE_MINOR_NUMBER 16
#define IPIPE_PATCH_NUMBER 1

#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; \
if (__x__) \
hard_local_irq_enable(); \
!__x__; \
})

struct ipipe_domain;

struct ipipe_sysinfo {
int sys_nr_cpus; /* Number of CPUs on board */
int sys_hrtimer_irq; /* hrtimer device IRQ */
u64 sys_hrtimer_freq; /* hrtimer device frequency */
u64 sys_hrclock_freq; /* hrclock device frequency */
u64 sys_cpu_freq; /* CPU frequency (Hz) */
};

#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) \
do { \
struct irq_desc *desc = irq_to_desc(irq); \
struct irq_chip *chip = get_irq_desc_chip(desc); \
chip->irq_unmask(&desc->irq_data); \
} while (0)

#define __ipipe_disable_irq(irq) \
do { \
struct irq_desc *desc = irq_to_desc(irq); \
struct irq_chip *chip = get_irq_desc_chip(desc); \
chip->irq_mask(&desc->irq_data); \
} while (0)

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)

void ___ipipe_sync_pipeline(void);

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

int __ipipe_get_irq_priority(unsigned int 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_do_root_xirq(ipd, irq) \
((ipd)->irqs[irq].handler(irq, &__raw_get_cpu_var(__ipipe_tick_regs)))

#define __ipipe_run_irqtail(irq) /* 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_syscall_watched_p(p, sc) \
(ipipe_notifier_enabled_p(p) || (unsigned long)sc >= NR_syscalls)

#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_root_tick_p(regs) 1

#endif /* !CONFIG_IPIPE */

#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

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

#endif /* !__ASM_BLACKFIN_IPIPE_H */