[b812f84] | 1 | /* |
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| 2 | * Instantiate the clock driver shell. |
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| 3 | * |
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| 4 | * $Id$ |
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| 5 | */ |
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| 6 | |
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| 7 | #include <bsp.h> |
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| 8 | |
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[11edb53] | 9 | #define CLOCK_VECTOR 84 |
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[b812f84] | 10 | |
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| 11 | #define Clock_driver_support_install_isr( _new, _old ) \ |
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| 12 | do { _old = (rtems_isr_entry) set_vector( _new, CLOCK_VECTOR, 1 ); } while(0) |
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| 13 | |
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| 14 | |
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[11edb53] | 15 | typedef struct { |
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| 16 | volatile unsigned8 cr; /* 0 - 0 : Timer Control Register */ |
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| 17 | volatile unsigned8 pad0; /* 1 - 1 : pad */ |
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| 18 | volatile unsigned8 ivr; /* 2 - 2 : Timer Interrupt Vector Register */ |
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| 19 | volatile unsigned8 pad1; /* 3 - 3 : pad */ |
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| 20 | volatile unsigned32 cpr; /* 4 - 7 : Timer Counter Preload Register */ |
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| 21 | volatile unsigned8 pad2[12]; /* 8 - 19 : pad */ |
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| 22 | volatile unsigned32 sr; /* 20 - 23 : Timer Status Register */ |
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| 23 | } timer_hw_t; |
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| 24 | |
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| 25 | #define TIMER_BASE (timer_hw_t *)0x72001 |
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| 26 | |
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| 27 | /* 8 microseconds per click, 125,000 per second */ |
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| 28 | |
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| 29 | /* XXX should check that microseconds_per_tick is >= 8 */ |
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| 30 | void Clock_driver_support_initialize_hardware() |
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| 31 | { |
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| 32 | timer_hw_t *t = TIMER_BASE; |
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| 33 | |
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| 34 | t->ivr = CLOCK_VECTOR; |
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| 35 | t->cpr = rtems_configuration_get_microseconds_per_tick() / 8; |
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| 36 | t->cr = 0xA0; /* initialize with timer disabled */ |
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| 37 | t->cr = 0xA1; /* enable timer */ |
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| 38 | } |
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| 39 | |
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| 40 | void Clock_driver_support_at_tick() |
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| 41 | { |
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| 42 | timer_hw_t *t = TIMER_BASE; |
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| 43 | |
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| 44 | t->sr = 0xA0; /* Negate timer interrupt request */ |
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| 45 | } |
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| 46 | |
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| 47 | |
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| 48 | void Clock_driver_support_shutdown_hardware() |
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| 49 | { |
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| 50 | timer_hw_t *t = TIMER_BASE; |
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| 51 | |
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| 52 | t->cr = 0xA0; /* initialize with timer disabled */ |
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| 53 | } |
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[b812f84] | 54 | |
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| 55 | #include "../../../shared/clockdrv_shell.c" |
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