diff options
Diffstat (limited to 'include/asm-sparc/timer_32.h')
-rw-r--r-- | include/asm-sparc/timer_32.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/include/asm-sparc/timer_32.h b/include/asm-sparc/timer_32.h new file mode 100644 index 000000000000..361e53898dd7 --- /dev/null +++ b/include/asm-sparc/timer_32.h | |||
@@ -0,0 +1,107 @@ | |||
1 | /* | ||
2 | * timer.h: Definitions for the timer chips on the Sparc. | ||
3 | * | ||
4 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | ||
5 | */ | ||
6 | |||
7 | |||
8 | #ifndef _SPARC_TIMER_H | ||
9 | #define _SPARC_TIMER_H | ||
10 | |||
11 | #include <asm/system.h> /* For SUN4M_NCPUS */ | ||
12 | #include <asm/sun4paddr.h> | ||
13 | #include <asm/btfixup.h> | ||
14 | |||
15 | /* Timer structures. The interrupt timer has two properties which | ||
16 | * are the counter (which is handled in do_timer in sched.c) and the limit. | ||
17 | * This limit is where the timer's counter 'wraps' around. Oddly enough, | ||
18 | * the sun4c timer when it hits the limit wraps back to 1 and not zero | ||
19 | * thus when calculating the value at which it will fire a microsecond you | ||
20 | * must adjust by one. Thanks SUN for designing such great hardware ;( | ||
21 | */ | ||
22 | |||
23 | /* Note that I am only going to use the timer that interrupts at | ||
24 | * Sparc IRQ 10. There is another one available that can fire at | ||
25 | * IRQ 14. Currently it is left untouched, we keep the PROM's limit | ||
26 | * register value and let the prom take these interrupts. This allows | ||
27 | * L1-A to work. | ||
28 | */ | ||
29 | |||
30 | struct sun4c_timer_info { | ||
31 | __volatile__ unsigned int cur_count10; | ||
32 | __volatile__ unsigned int timer_limit10; | ||
33 | __volatile__ unsigned int cur_count14; | ||
34 | __volatile__ unsigned int timer_limit14; | ||
35 | }; | ||
36 | |||
37 | #define SUN4C_TIMER_PHYSADDR 0xf3000000 | ||
38 | #ifdef CONFIG_SUN4 | ||
39 | #define SUN_TIMER_PHYSADDR SUN4_300_TIMER_PHYSADDR | ||
40 | #else | ||
41 | #define SUN_TIMER_PHYSADDR SUN4C_TIMER_PHYSADDR | ||
42 | #endif | ||
43 | |||
44 | /* A sun4m has two blocks of registers which are probably of the same | ||
45 | * structure. LSI Logic's L64851 is told to _decrement_ from the limit | ||
46 | * value. Aurora behaves similarly but its limit value is compacted in | ||
47 | * other fashion (it's wider). Documented fields are defined here. | ||
48 | */ | ||
49 | |||
50 | /* As with the interrupt register, we have two classes of timer registers | ||
51 | * which are per-cpu and master. Per-cpu timers only hit that cpu and are | ||
52 | * only level 14 ticks, master timer hits all cpus and is level 10. | ||
53 | */ | ||
54 | |||
55 | #define SUN4M_PRM_CNT_L 0x80000000 | ||
56 | #define SUN4M_PRM_CNT_LVALUE 0x7FFFFC00 | ||
57 | |||
58 | struct sun4m_timer_percpu_info { | ||
59 | __volatile__ unsigned int l14_timer_limit; /* Initial value is 0x009c4000 */ | ||
60 | __volatile__ unsigned int l14_cur_count; | ||
61 | |||
62 | /* This register appears to be write only and/or inaccessible | ||
63 | * on Uni-Processor sun4m machines. | ||
64 | */ | ||
65 | __volatile__ unsigned int l14_limit_noclear; /* Data access error is here */ | ||
66 | |||
67 | __volatile__ unsigned int cntrl; /* =1 after POST on Aurora */ | ||
68 | __volatile__ unsigned char space[PAGE_SIZE - 16]; | ||
69 | }; | ||
70 | |||
71 | struct sun4m_timer_regs { | ||
72 | struct sun4m_timer_percpu_info cpu_timers[SUN4M_NCPUS]; | ||
73 | volatile unsigned int l10_timer_limit; | ||
74 | volatile unsigned int l10_cur_count; | ||
75 | |||
76 | /* Again, this appears to be write only and/or inaccessible | ||
77 | * on uni-processor sun4m machines. | ||
78 | */ | ||
79 | volatile unsigned int l10_limit_noclear; | ||
80 | |||
81 | /* This register too, it must be magic. */ | ||
82 | volatile unsigned int foobar; | ||
83 | |||
84 | volatile unsigned int cfg; /* equals zero at boot time... */ | ||
85 | }; | ||
86 | |||
87 | #define SUN4D_PRM_CNT_L 0x80000000 | ||
88 | #define SUN4D_PRM_CNT_LVALUE 0x7FFFFC00 | ||
89 | |||
90 | struct sun4d_timer_regs { | ||
91 | volatile unsigned int l10_timer_limit; | ||
92 | volatile unsigned int l10_cur_countx; | ||
93 | volatile unsigned int l10_limit_noclear; | ||
94 | volatile unsigned int ctrl; | ||
95 | volatile unsigned int l10_cur_count; | ||
96 | }; | ||
97 | |||
98 | extern struct sun4d_timer_regs *sun4d_timers; | ||
99 | |||
100 | extern __volatile__ unsigned int *master_l10_counter; | ||
101 | extern __volatile__ unsigned int *master_l10_limit; | ||
102 | |||
103 | /* FIXME: Make do_[gs]ettimeofday btfixup calls */ | ||
104 | BTFIXUPDEF_CALL(int, bus_do_settimeofday, struct timespec *tv) | ||
105 | #define bus_do_settimeofday(tv) BTFIXUP_CALL(bus_do_settimeofday)(tv) | ||
106 | |||
107 | #endif /* !(_SPARC_TIMER_H) */ | ||