arch/blackfin/include/asm/ipipe_base.h

   1 /*   -*- linux-c -*-
   2  *   include/asm-blackfin/_baseipipe.h
   3  *
   4  *   Copyright (C) 2007 Philippe Gerum.
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation, Inc., 675 Mass Ave, Cambridge MA 02139,
   9  *   USA; either version 2 of the License, or (at your option) any later
  10  *   version.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  */
  21
  22 #ifndef __ASM_BLACKFIN_IPIPE_BASE_H
  23 #define __ASM_BLACKFIN_IPIPE_BASE_H
  24
  25 #ifdef CONFIG_IPIPE
  26
  27 #define IPIPE_NR_XIRQS          NR_IRQS
  28 #define IPIPE_IRQ_ISHIFT        5       /* 2^5 for 32bits arch. */
  29
  30 /* Blackfin-specific, global domain flags */
  31 #define IPIPE_ROOTLOCK_FLAG     1       /* Lock pipeline for root */
  32
  33  /* Blackfin traps -- i.e. exception vector numbers */
  34 #define IPIPE_NR_FAULTS         52 /* We leave a gap after VEC_ILL_RES. */
  35 /* Pseudo-vectors used for kernel events */
  36 #define IPIPE_FIRST_EVENT       IPIPE_NR_FAULTS
  37 #define IPIPE_EVENT_SYSCALL     (IPIPE_FIRST_EVENT)
  38 #define IPIPE_EVENT_SCHEDULE    (IPIPE_FIRST_EVENT + 1)
  39 #define IPIPE_EVENT_SIGWAKE     (IPIPE_FIRST_EVENT + 2)
  40 #define IPIPE_EVENT_SETSCHED    (IPIPE_FIRST_EVENT + 3)
  41 #define IPIPE_EVENT_INIT        (IPIPE_FIRST_EVENT + 4)
  42 #define IPIPE_EVENT_EXIT        (IPIPE_FIRST_EVENT + 5)
  43 #define IPIPE_EVENT_CLEANUP     (IPIPE_FIRST_EVENT + 6)
  44 #define IPIPE_LAST_EVENT        IPIPE_EVENT_CLEANUP
  45 #define IPIPE_NR_EVENTS         (IPIPE_LAST_EVENT + 1)
  46
  47 #define IPIPE_TIMER_IRQ         IRQ_CORETMR
  48
  49 #ifndef __ASSEMBLY__
  50
  51 #include <linux/bitops.h>
  52
  53 extern int test_bit(int nr, const void *addr);
  54
  55
  56 extern unsigned long __ipipe_root_status; /* Alias to ipipe_root_cpudom_var(status) */
  57
  58 static inline void __ipipe_stall_root(void)
  59 {
  60         volatile unsigned long *p = &__ipipe_root_status;
  61         set_bit(0, p);
  62 }
  63
  64 static inline unsigned long __ipipe_test_and_stall_root(void)
  65 {
  66         volatile unsigned long *p = &__ipipe_root_status;
  67         return test_and_set_bit(0, p);
  68 }
  69
  70 static inline unsigned long __ipipe_test_root(void)
  71 {
  72         const unsigned long *p = &__ipipe_root_status;
  73         return test_bit(0, p);
  74 }
  75
  76 #endif /* !__ASSEMBLY__ */
  77
  78 #endif /* CONFIG_IPIPE */
  79
  80 #endif /* !__ASM_BLACKFIN_IPIPE_BASE_H */