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 <asm/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
__ipipe_check_tickdev(const char * devname)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
__ipipe_ffnz(unsigned long ul)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 */
210