4.104.114.84.95
Last change
on this file since fc63544 was
bb15d1d2,
checked in by Jennifer Averett <Jennifer.Averett@…>, on 11/22/04 at 22:27:19
|
2004-11-22 Joel Sherrill <joel@…>
PR 693/misc
- libchip/rtc/mc146818a_ioreg.c: Disable unless on a target with
in/outport routines.
|
-
Property mode set to
100644
|
File size:
1.3 KB
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Rev | Line | |
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[29322a8d] | 1 | /* |
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| 2 | * This file contains a typical set of register access routines which may be |
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| 3 | * used with the MC146818A chip if accesses to the chip are as follows: |
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| 4 | * |
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| 5 | * + registers are in I/O space |
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| 6 | * + registers are accessed as bytes |
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| 7 | * + registers are only byte-aligned (no address gaps) |
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| 8 | * |
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| 9 | * COPYRIGHT (c) 1989-1997. |
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| 10 | * On-Line Applications Research Corporation (OAR). |
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| 11 | * |
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| 12 | * The license and distribution terms for this file may be |
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| 13 | * found in the file LICENSE in this distribution or at |
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| 14 | * http://www.rtems.com/license/LICENSE. |
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| 15 | * |
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| 16 | * $Id$ |
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| 17 | */ |
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| 18 | |
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| 19 | #include <rtems.h> |
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| 20 | #include <bsp.h> |
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| 21 | |
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[bb15d1d2] | 22 | /* |
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| 23 | * At this point, not all CPUs or BSPs have defined in/out port routines. |
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| 24 | */ |
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| 25 | #if defined(__i386__) || defined(__PPC__) |
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| 26 | #if defined(inport_byte) |
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[d4d624e2] | 27 | uint32_t mc146818a_get_register( |
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| 28 | uint32_t ulCtrlPort, |
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| 29 | uint8_t ucRegNum |
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[29322a8d] | 30 | ) |
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| 31 | { |
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[d4d624e2] | 32 | uint8_t val; |
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| 33 | uint8_t tmp; |
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[29322a8d] | 34 | |
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| 35 | outport_byte( ulCtrlPort, ucRegNum ); |
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| 36 | inport_byte( 0x84, tmp ); /* Hack a delay to give chip time to settle */ |
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| 37 | inport_byte( ulCtrlPort+1, val ); |
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| 38 | inport_byte( 0x84, tmp ); /* Hack a delay to give chip time to settle */ |
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| 39 | return val; |
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| 40 | } |
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| 41 | |
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| 42 | void mc146818a_set_register( |
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[d4d624e2] | 43 | uint32_t ulCtrlPort, |
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| 44 | uint8_t ucRegNum, |
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| 45 | uint32_t ucData |
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[29322a8d] | 46 | ) |
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| 47 | { |
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| 48 | outport_byte( ulCtrlPort, ucRegNum ); |
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[d4d624e2] | 49 | outport_byte( ulCtrlPort+1, (uint8_t)ucData ); |
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[29322a8d] | 50 | } |
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[bb15d1d2] | 51 | #endif |
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| 52 | #endif |
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