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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [hal/] [sparc/] [leon/] [v2_0/] [include/] [hal_clock.h] - Rev 593
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#ifndef CYGONCE_HAL_CLOCK_H #define CYGONCE_HAL_CLOCK_H //============================================================================= // // hal_clock.h // // HAL clock support // //============================================================================= //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later version. // // eCos is distributed in the hope that it will be useful, but WITHOUT ANY // WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License along // with eCos; if not, write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. // // As a special exception, if other files instantiate templates or use macros // or inline functions from this file, or you compile this file and link it // with other works to produce a work based on this file, this file does not // by itself cause the resulting work to be covered by the GNU General Public // License. However the source code for this file must still be made available // in accordance with section (3) of the GNU General Public License. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //============================================================================= //#####DESCRIPTIONBEGIN#### // // Author(s): nickg, gthomas, hmt // Contributors: nickg, gthomas, hmt // Date: 1999-01-28 // Purpose: Define clock support // Description: The macros defined here provide the HAL APIs for handling // the clock. // // Usage: // #include <cyg/hal/hal_intr.h> // which includes this file // ... // // //####DESCRIPTIONEND#### // //============================================================================= #include <cyg/hal/hal_io.h> //----------------------------------------------------------------------------- // Clock control // in erc32 simulator: // 4 = UART A // 5 = UART B // 7 = UART error // 12 = GPT (general purpose timer) // 13 = TI1 (realtime clock) // 15 = watchdog // in erc32 simulator: // The vector used by the Real time clock is defined in hal_xpic.h // We could place conditional code here to choose one clock or the other // depending on the selected interrupt vector... but pro tem: (pun intended) #define SPARC_LEON_TIMER_SCALE (24) /* These must be accessed word-wide to work! */ #define SPARC_LEON_REG (0x80000000) #define SPARC_LEON_TI1_COUNTER (SPARC_LEON_REG + 0x40) #define SPARC_LEON_TI1_CRELOAD (SPARC_LEON_REG + 0x44) #define SPARC_LEON_SCALER (SPARC_LEON_REG + 0x60) #define SPARC_LEON_SRELOAD (SPARC_LEON_REG + 0x64) /* LEON timer control register bits */ #define SPARC_LEON_TI1_EN 1 /* System Enable */ #define SPARC_LEON_TI1_RL 2 /* Continuous Running */ #define SPARC_LEON_TI1_LD 4 /* Counter Load */ #define SPARC_LEON_TI1_CONTROL (SPARC_LEON_REG + 0x48) externC cyg_int32 cyg_hal_sparc_clock_period; #define HAL_CLOCK_INITIALIZE( _period_ ) CYG_MACRO_START \ cyg_hal_sparc_clock_period = (_period_); \ HAL_WRITE_UINT32( SPARC_LEON_TI1_CRELOAD, (_period_) ); \ HAL_WRITE_UINT32( SPARC_LEON_TI1_COUNTER, (_period_) ); \ HAL_WRITE_UINT32( SPARC_LEON_TI1_CONTROL, \ (SPARC_LEON_TI1_EN | \ SPARC_LEON_TI1_RL | \ SPARC_LEON_TI1_LD) ); \ CYG_MACRO_END #define HAL_CLOCK_RESET( _vector_, _period_ ) /* nowt, it is freerunning */ #define HAL_CLOCK_READ( _pvalue_ ) CYG_MACRO_START \ cyg_uint32 _read_; \ HAL_READ_UINT32( SPARC_LEON_TI1_COUNTER, _read_ ); \ *((cyg_uint32 *)(_pvalue_)) = \ (cyg_hal_sparc_clock_period - _read_ ); \ CYG_MACRO_END #ifdef CYGVAR_KERNEL_COUNTERS_CLOCK_LATENCY #define HAL_CLOCK_LATENCY( _pvalue_ ) HAL_CLOCK_READ( _pvalue_ ) #endif //----------------------------------------------------------------------------- #endif // ifndef CYGONCE_HAL_CLOCK_H // End of hal_clock.h
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