7c039a90f0
Signed-off-by: Philippe Gerum <rpm@xenomai.org> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
257 lines
7 KiB
C
257 lines
7 KiB
C
/* -*- linux-c -*-
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* include/asm-blackfin/ipipe.h
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*
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* Copyright (C) 2002-2007 Philippe Gerum.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, Inc., 675 Mass Ave, Cambridge MA 02139,
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* USA; either version 2 of the License, or (at your option) any later
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* version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __ASM_BLACKFIN_IPIPE_H
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#define __ASM_BLACKFIN_IPIPE_H
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#ifdef CONFIG_IPIPE
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#include <linux/cpumask.h>
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#include <linux/list.h>
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#include <linux/threads.h>
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#include <linux/irq.h>
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#include <linux/ipipe_percpu.h>
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#include <asm/ptrace.h>
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#include <asm/irq.h>
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#include <asm/bitops.h>
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#include <asm/atomic.h>
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#include <asm/traps.h>
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#define IPIPE_ARCH_STRING "1.11-00"
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#define IPIPE_MAJOR_NUMBER 1
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#define IPIPE_MINOR_NUMBER 11
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#define IPIPE_PATCH_NUMBER 0
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#ifdef CONFIG_SMP
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#error "I-pipe/blackfin: SMP not implemented"
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#else /* !CONFIG_SMP */
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#define ipipe_processor_id() 0
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#endif /* CONFIG_SMP */
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#define prepare_arch_switch(next) \
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do { \
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ipipe_schedule_notify(current, next); \
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local_irq_disable_hw(); \
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} while (0)
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#define task_hijacked(p) \
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({ \
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int __x__ = __ipipe_root_domain_p; \
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__clear_bit(IPIPE_SYNC_FLAG, &ipipe_root_cpudom_var(status)); \
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if (__x__) \
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local_irq_enable_hw(); \
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!__x__; \
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})
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struct ipipe_domain;
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struct ipipe_sysinfo {
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int ncpus; /* Number of CPUs on board */
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u64 cpufreq; /* CPU frequency (in Hz) */
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/* Arch-dependent block */
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struct {
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unsigned tmirq; /* Timer tick IRQ */
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u64 tmfreq; /* Timer frequency */
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} archdep;
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};
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#define ipipe_read_tsc(t) \
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({ \
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unsigned long __cy2; \
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__asm__ __volatile__ ("1: %0 = CYCLES2\n" \
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"%1 = CYCLES\n" \
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"%2 = CYCLES2\n" \
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"CC = %2 == %0\n" \
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"if ! CC jump 1b\n" \
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: "=d,a" (((unsigned long *)&t)[1]), \
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"=d,a" (((unsigned long *)&t)[0]), \
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"=d,a" (__cy2) \
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: /*no input*/ : "CC"); \
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t; \
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})
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#define ipipe_cpu_freq() __ipipe_core_clock
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#define ipipe_tsc2ns(_t) (((unsigned long)(_t)) * __ipipe_freq_scale)
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#define ipipe_tsc2us(_t) (ipipe_tsc2ns(_t) / 1000 + 1)
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/* Private interface -- Internal use only */
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#define __ipipe_check_platform() do { } while (0)
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#define __ipipe_init_platform() do { } while (0)
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extern atomic_t __ipipe_irq_lvdepth[IVG15 + 1];
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extern unsigned long __ipipe_irq_lvmask;
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extern struct ipipe_domain ipipe_root;
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/* enable/disable_irqdesc _must_ be used in pairs. */
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void __ipipe_enable_irqdesc(struct ipipe_domain *ipd,
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unsigned irq);
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void __ipipe_disable_irqdesc(struct ipipe_domain *ipd,
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unsigned irq);
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#define __ipipe_enable_irq(irq) (irq_desc[irq].chip->unmask(irq))
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#define __ipipe_disable_irq(irq) (irq_desc[irq].chip->mask(irq))
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static inline int __ipipe_check_tickdev(const char *devname)
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{
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return 1;
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}
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static inline void __ipipe_lock_root(void)
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{
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set_bit(IPIPE_SYNCDEFER_FLAG, &ipipe_root_cpudom_var(status));
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}
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static inline void __ipipe_unlock_root(void)
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{
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clear_bit(IPIPE_SYNCDEFER_FLAG, &ipipe_root_cpudom_var(status));
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}
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void __ipipe_enable_pipeline(void);
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#define __ipipe_hook_critical_ipi(ipd) do { } while (0)
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#define __ipipe_sync_pipeline ___ipipe_sync_pipeline
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void ___ipipe_sync_pipeline(unsigned long syncmask);
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void __ipipe_handle_irq(unsigned irq, struct pt_regs *regs);
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int __ipipe_get_irq_priority(unsigned irq);
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void __ipipe_stall_root_raw(void);
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void __ipipe_unstall_root_raw(void);
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void __ipipe_serial_debug(const char *fmt, ...);
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asmlinkage void __ipipe_call_irqtail(unsigned long addr);
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DECLARE_PER_CPU(struct pt_regs, __ipipe_tick_regs);
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extern unsigned long __ipipe_core_clock;
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extern unsigned long __ipipe_freq_scale;
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extern unsigned long __ipipe_irq_tail_hook;
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static inline unsigned long __ipipe_ffnz(unsigned long ul)
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{
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return ffs(ul) - 1;
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}
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#define __ipipe_run_irqtail() /* Must be a macro */ \
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do { \
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unsigned long __pending; \
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CSYNC(); \
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__pending = bfin_read_IPEND(); \
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if (__pending & 0x8000) { \
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__pending &= ~0x8010; \
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if (__pending && (__pending & (__pending - 1)) == 0) \
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__ipipe_call_irqtail(__ipipe_irq_tail_hook); \
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} \
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} while (0)
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#define __ipipe_run_isr(ipd, irq) \
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do { \
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if (!__ipipe_pipeline_head_p(ipd)) \
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local_irq_enable_hw(); \
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if (ipd == ipipe_root_domain) { \
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if (unlikely(ipipe_virtual_irq_p(irq))) { \
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irq_enter(); \
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ipd->irqs[irq].handler(irq, ipd->irqs[irq].cookie); \
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irq_exit(); \
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} else \
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ipd->irqs[irq].handler(irq, &__raw_get_cpu_var(__ipipe_tick_regs)); \
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} else { \
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__clear_bit(IPIPE_SYNC_FLAG, &ipipe_cpudom_var(ipd, status)); \
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ipd->irqs[irq].handler(irq, ipd->irqs[irq].cookie); \
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/* Attempt to exit the outer interrupt level before \
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* starting the deferred IRQ processing. */ \
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__ipipe_run_irqtail(); \
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__set_bit(IPIPE_SYNC_FLAG, &ipipe_cpudom_var(ipd, status)); \
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} \
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local_irq_disable_hw(); \
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} while (0)
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#define __ipipe_syscall_watched_p(p, sc) \
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(((p)->flags & PF_EVNOTIFY) || (unsigned long)sc >= NR_syscalls)
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void ipipe_init_irq_threads(void);
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int ipipe_start_irq_thread(unsigned irq, struct irq_desc *desc);
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#ifdef CONFIG_TICKSOURCE_CORETMR
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#define IRQ_SYSTMR IRQ_CORETMR
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#define IRQ_PRIOTMR IRQ_CORETMR
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#else
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#define IRQ_SYSTMR IRQ_TIMER0
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#define IRQ_PRIOTMR CONFIG_IRQ_TIMER0
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#endif
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#ifdef CONFIG_BF561
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#define bfin_write_TIMER_DISABLE(val) bfin_write_TMRS8_DISABLE(val)
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#define bfin_write_TIMER_ENABLE(val) bfin_write_TMRS8_ENABLE(val)
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#define bfin_write_TIMER_STATUS(val) bfin_write_TMRS8_STATUS(val)
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#define bfin_read_TIMER_STATUS() bfin_read_TMRS8_STATUS()
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#elif defined(CONFIG_BF54x)
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#define bfin_write_TIMER_DISABLE(val) bfin_write_TIMER_DISABLE0(val)
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#define bfin_write_TIMER_ENABLE(val) bfin_write_TIMER_ENABLE0(val)
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#define bfin_write_TIMER_STATUS(val) bfin_write_TIMER_STATUS0(val)
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#define bfin_read_TIMER_STATUS(val) bfin_read_TIMER_STATUS0(val)
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#endif
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#define __ipipe_root_tick_p(regs) ((regs->ipend & 0x10) != 0)
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#else /* !CONFIG_IPIPE */
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#define task_hijacked(p) 0
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#define ipipe_trap_notify(t, r) 0
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#define __ipipe_stall_root_raw() do { } while (0)
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#define __ipipe_unstall_root_raw() do { } while (0)
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#define ipipe_init_irq_threads() do { } while (0)
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#define ipipe_start_irq_thread(irq, desc) 0
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#ifndef CONFIG_TICKSOURCE_GPTMR0
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#define IRQ_SYSTMR IRQ_CORETMR
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#define IRQ_PRIOTMR IRQ_CORETMR
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#else
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#define IRQ_SYSTMR IRQ_TIMER0
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#define IRQ_PRIOTMR CONFIG_IRQ_TIMER0
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#endif
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#define __ipipe_root_tick_p(regs) 1
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#endif /* !CONFIG_IPIPE */
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#define ipipe_update_tick_evtdev(evtdev) do { } while (0)
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#endif /* !__ASM_BLACKFIN_IPIPE_H */
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