Mercurial > flash_v2
diff packages/hal/i386/pc/current/src/var_misc.c @ 76:435cced73e2f ecos-v1_3_1-release
eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
| author | jlarmour |
|---|---|
| date | Tue, 28 Mar 2000 14:10:45 +0000 |
| parents | |
| children |
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new file mode 100644 --- /dev/null +++ b/packages/hal/i386/pc/current/src/var_misc.c @@ -0,0 +1,121 @@ +//========================================================================== +// +// var_misc.c +// +// HAL implementation miscellaneous functions +// +//========================================================================== +//####COPYRIGHTBEGIN#### +// +// ------------------------------------------- +// The contents of this file are subject to the Red Hat eCos Public License +// Version 1.1 (the "License"); you may not use this file except in +// compliance with the License. You may obtain a copy of the License at +// http://www.redhat.com/ +// +// Software distributed under the License is distributed on an "AS IS" +// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the +// License for the specific language governing rights and limitations under +// the License. +// +// The Original Code is eCos - Embedded Configurable Operating System, +// released September 30, 1998. +// +// The Initial Developer of the Original Code is Red Hat. +// Portions created by Red Hat are +// Copyright (C) 1998, 1999, 2000 Red Hat, Inc. +// All Rights Reserved. +// ------------------------------------------- +// +//####COPYRIGHTEND#### +//========================================================================== +//#####DESCRIPTIONBEGIN#### +// +// Author(s): nickg +// Contributors: nickg, jlarmour, pjo +// Date: 1999-01-21 +// Purpose: HAL miscellaneous functions +// Description: This file contains miscellaneous functions provided by the +// HAL. +// +//####DESCRIPTIONEND#### +// +//========================================================================*/ + +#include <pkgconf/hal.h> + +#include <cyg/infra/cyg_type.h> // Base types +#include <cyg/infra/cyg_trac.h> // tracing macros +#include <cyg/infra/cyg_ass.h> // assertion macros + +#include <cyg/hal/hal_intr.h> + +#include <cyg/hal/plf_misc.h> + +/*------------------------------------------------------------------------*/ +// Array which stores the configured priority levels for the configured +// interrupts. + +volatile CYG_BYTE hal_interrupt_level[CYGNUM_HAL_ISR_COUNT]; + +/*------------------------------------------------------------------------*/ + +void hal_variant_init(void) +{ +#ifdef CYGPKG_KERNEL + { int i ; + +// Write all of the interrupt vectors to point to us. + for (i = 0; i < CYGNUM_HAL_ISR_COUNT; i++) + { hal_pc_interrupt_attach(i, (CYG_ADDRESS)cyg_hal_default_isr, 0, 0) ; + } + } +#endif /* CYGPKG_KERNEL */ +} + + +// pjo, 5 oct 1999 + +void hal_pc_clock_initialize(cyg_uint32 period) +{ +/* Select mode 3: square wave. Then we'll load LSB, and finally MSB. */ + pc_outb(PC_PIT_CONTROL, 0x36) ; + pc_outb(PC_PIT_CLOCK_0, period); /* Only the LSB makes it to the bus. */ + pc_outb(PC_PIT_CLOCK_0, period >> 8); /* Now the second 8 bits. */ +} + + +void hal_pc_clock_read(cyg_uint32 * count) +{ + cyg_uint32 curr ; + cyg_uint32 interruptState ; + +/* Hold off on interrupts for a bit. */ + HAL_DISABLE_INTERRUPTS(interruptState) ; + +/* Latch counter 0. */ + pc_outb(PC_PIT_CONTROL, 0x00); + +/* Now get the value. */ + curr = pc_inb(PC_PIT_CLOCK_0) & 0xFF ; + curr |= ((pc_inb(PC_PIT_CLOCK_0) & 0xFF) << 8); + +/* (Maybe) restore interrupts. */ + HAL_RESTORE_INTERRUPTS(interruptState) ; + + count[0] = CYGNUM_HAL_RTC_PERIOD - curr ; +} + +#if 0 +void hal_idle_thread_action(cyg_uint32 loop_count) +{ asm("hlt") ; +} +#endif + +void hal_ctrlc_isr_init(void) +{ +} + + +/*------------------------------------------------------------------------*/ +/* End of var_misc.c */
