arch/blackfin/include/asm/ipipe.h

   1 /*   -*- linux-c -*-
   2  *   include/asm-blackfin/ipipe.h
   3  *
   4  *   Copyright (C) 2002-2007 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_H
  23 #define __ASM_BLACKFIN_IPIPE_H
  24
  25 #ifdef CONFIG_IPIPE
  26
  27 #include <linux/cpumask.h>
  28 #include <linux/list.h>
  29 #include <linux/threads.h>
  30 #include <linux/irq.h>
  31 #include <linux/ipipe_percpu.h>
  32 #include <asm/ptrace.h>
  33 #include <asm/irq.h>
  34 #include <asm/bitops.h>
  35 #include <linux/atomic.h>
  36 #include <asm/traps.h>
  37 #include <asm/bitsperlong.h>
  38
  39 #define IPIPE_ARCH_STRING     "1.16-01"
  40 #define IPIPE_MAJOR_NUMBER    1
  41 #define IPIPE_MINOR_NUMBER    16
  42 #define IPIPE_PATCH_NUMBER    1
  43
  44 #ifdef CONFIG_SMP
  45 #error "I-pipe/blackfin: SMP not implemented"
  46 #else /* !CONFIG_SMP */
  47 #define ipipe_processor_id()    0
  48 #endif  /* CONFIG_SMP */
  49
  50 #define prepare_arch_switch(next)               \
  51 do {                                            \
  52         ipipe_schedule_notify(current, next);   \
  53         hard_local_irq_disable();                       \
  54 } while (0)
  55
  56 #define task_hijacked(p)                                                \
  57         ({                                                              \
  58                 int __x__ = __ipipe_root_domain_p;                      \
  59                 if (__x__)                                              \
  60                         hard_local_irq_enable();                        \
  61                 !__x__;                                                 \
  62         })
  63
  64 struct ipipe_domain;
  65
  66 struct ipipe_sysinfo {
  67         int sys_nr_cpus;        /* Number of CPUs on board */
  68         int sys_hrtimer_irq;    /* hrtimer device IRQ */
  69         u64 sys_hrtimer_freq;   /* hrtimer device frequency */
  70         u64 sys_hrclock_freq;   /* hrclock device frequency */
  71         u64 sys_cpu_freq;       /* CPU frequency (Hz) */
  72 };
  73
  74 #define ipipe_read_tsc(t)                                       \
  75         ({                                                      \
  76         unsigned long __cy2;                                    \
  77         __asm__ __volatile__ ("1: %0 = CYCLES2\n"               \
  78                                 "%1 = CYCLES\n"                 \
  79                                 "%2 = CYCLES2\n"                \
  80                                 "CC = %2 == %0\n"               \
  81                                 "if ! CC jump 1b\n"             \
  82                                 : "=d,a" (((unsigned long *)&t)[1]),    \
  83                                   "=d,a" (((unsigned long *)&t)[0]),    \
  84                                   "=d,a" (__cy2)                                \
  85                                 : /*no input*/ : "CC");                 \
  86         t;                                                              \
  87         })
  88
  89 #define ipipe_cpu_freq()        __ipipe_core_clock
  90 #define ipipe_tsc2ns(_t)        (((unsigned long)(_t)) * __ipipe_freq_scale)
  91 #define ipipe_tsc2us(_t)        (ipipe_tsc2ns(_t) / 1000 + 1)
  92
  93 /* Private interface -- Internal use only */
  94
  95 #define __ipipe_check_platform()        do { } while (0)
  96
  97 #define __ipipe_init_platform()         do { } while (0)
  98
  99 extern atomic_t __ipipe_irq_lvdepth[IVG15 + 1];
 100
 101 extern unsigned long __ipipe_irq_lvmask;
 102
 103 extern struct ipipe_domain ipipe_root;
 104
 105 /* enable/disable_irqdesc _must_ be used in pairs. */
 106
 107 void __ipipe_enable_irqdesc(struct ipipe_domain *ipd,
 108                             unsigned irq);
 109
 110 void __ipipe_disable_irqdesc(struct ipipe_domain *ipd,
 111                              unsigned irq);
 112
 113 #define __ipipe_enable_irq(irq)                                         \
 114         do {                                                            \
 115                 struct irq_desc *desc = irq_to_desc(irq);               \
 116                 struct irq_chip *chip = get_irq_desc_chip(desc);        \
 117                 chip->irq_unmask(&desc->irq_data);                      \
 118         } while (0)
 119
 120 #define __ipipe_disable_irq(irq)                                        \
 121         do {                                                            \
 122                 struct irq_desc *desc = irq_to_desc(irq);               \
 123                 struct irq_chip *chip = get_irq_desc_chip(desc);        \
 124                 chip->irq_mask(&desc->irq_data);                        \
 125         } while (0)
 126
 127 static inline int __ipipe_check_tickdev(const char *devname)
 128 {
 129         return 1;
 130 }
 131
 132 void __ipipe_enable_pipeline(void);
 133
 134 #define __ipipe_hook_critical_ipi(ipd) do { } while (0)
 135
 136 void ___ipipe_sync_pipeline(void);
 137
 138 void __ipipe_handle_irq(unsigned irq, struct pt_regs *regs);
 139
 140 int __ipipe_get_irq_priority(unsigned int irq);
 141
 142 void __ipipe_serial_debug(const char *fmt, ...);
 143
 144 asmlinkage void __ipipe_call_irqtail(unsigned long addr);
 145
 146 DECLARE_PER_CPU(struct pt_regs, __ipipe_tick_regs);
 147
 148 extern unsigned long __ipipe_core_clock;
 149
 150 extern unsigned long __ipipe_freq_scale;
 151
 152 extern unsigned long __ipipe_irq_tail_hook;
 153
 154 static inline unsigned long __ipipe_ffnz(unsigned long ul)
 155 {
 156         return ffs(ul) - 1;
 157 }
 158
 159 #define __ipipe_do_root_xirq(ipd, irq)                                  \
 160         ((ipd)->irqs[irq].handler(irq, &__raw_get_cpu_var(__ipipe_tick_regs)))
 161
 162 #define __ipipe_run_irqtail(irq)  /* Must be a macro */                 \
 163         do {                                                            \
 164                 unsigned long __pending;                                \
 165                 CSYNC();                                                \
 166                 __pending = bfin_read_IPEND();                          \
 167                 if (__pending & 0x8000) {                               \
 168                         __pending &= ~0x8010;                           \
 169                         if (__pending && (__pending & (__pending - 1)) == 0) \
 170                                 __ipipe_call_irqtail(__ipipe_irq_tail_hook); \
 171                 }                                                       \
 172         } while (0)
 173
 174 #define __ipipe_syscall_watched_p(p, sc)        \
 175         (ipipe_notifier_enabled_p(p) || (unsigned long)sc >= NR_syscalls)
 176
 177 #ifdef CONFIG_BF561
 178 #define bfin_write_TIMER_DISABLE(val)   bfin_write_TMRS8_DISABLE(val)
 179 #define bfin_write_TIMER_ENABLE(val)    bfin_write_TMRS8_ENABLE(val)
 180 #define bfin_write_TIMER_STATUS(val)    bfin_write_TMRS8_STATUS(val)
 181 #define bfin_read_TIMER_STATUS()        bfin_read_TMRS8_STATUS()
 182 #elif defined(CONFIG_BF54x)
 183 #define bfin_write_TIMER_DISABLE(val)   bfin_write_TIMER_DISABLE0(val)
 184 #define bfin_write_TIMER_ENABLE(val)    bfin_write_TIMER_ENABLE0(val)
 185 #define bfin_write_TIMER_STATUS(val)    bfin_write_TIMER_STATUS0(val)
 186 #define bfin_read_TIMER_STATUS(val)     bfin_read_TIMER_STATUS0(val)
 187 #endif
 188
 189 #define __ipipe_root_tick_p(regs)       ((regs->ipend & 0x10) != 0)
 190
 191 #else /* !CONFIG_IPIPE */
 192
 193 #define task_hijacked(p)                0
 194 #define ipipe_trap_notify(t, r)         0
 195 #define __ipipe_root_tick_p(regs)       1
 196
 197 #endif /* !CONFIG_IPIPE */
 198
 199 #ifdef CONFIG_TICKSOURCE_CORETMR
 200 #define IRQ_SYSTMR              IRQ_CORETMR
 201 #define IRQ_PRIOTMR             IRQ_CORETMR
 202 #else
 203 #define IRQ_SYSTMR              IRQ_TIMER0
 204 #define IRQ_PRIOTMR             CONFIG_IRQ_TIMER0
 205 #endif
 206
 207 #define ipipe_update_tick_evtdev(evtdev)        do { } while (0)
 208
 209 #endif  /* !__ASM_BLACKFIN_IPIPE_H */