csl_intcglobalrestore.c

TI达芬奇dm644x各硬件模块测试代码

/*  ============================================================================
 *   Copyright (c) Texas Instruments Inc 2002, 2003, 2004, 2005
 *
 *   Use of this software is controlled by the terms and conditions found in the
 *   license agreement under which this software has been supplied.
 *   ===========================================================================
 */

/** @file  csl_intcGlobalRestore.c
 *
 *  @brief  File for functional layer of CSL API @a CSL_intcGlobalRestore()
 *
 *  Description
 *  - @a CSL_intcGlobalRestore() function definition
 *
 *  Path: \\(CSLPATH)\\soc\\davinci\\arm9\\src\\intc
 *
 *  Modification
 *  - Modified on: 2004/04/15
 *  - Reason: creation
 *
 *  Date   2004/04/15
 *  Author RG Kiran
 */

#include <csl_intc.h>
#include <csl_error.h>
#include <csl_types.h>

#include <_csl_intc0.h>

/** ============================================================================
 *  @n@b CSL_intcGlobalRestore
 *
 *  @b Description
 *  @n Restore global interrupt enable/disable to a previous state.
 *     The API restores the global interrupt enable/disable state to a previous
 *     state as recorded by the global-event-enable state passed as an argument.
 *     CSL_intcGlobalRestore () must be called from a privileged mode.
 *
 *  @b Arguments
 *  @verbatim
        prevState   Object containing information about previous state
    @endverbatim
 *
 *  <b> Return Value </b> CSL_Status
 *  @li                   CSL_SOK on success
 *
 *  @b Example:
 *  @verbatim
        CSL_IntcGlobalEnableState   gieState;

        CSL_intcGlobalDisable(&gieState);
        // critical-section code //
        CSL_intcGlobalRestore(gieState);
    @endverbatim
 * =============================================================================
 */
#pragma CODE_SECTION (CSL_intcGlobalRestore, ".text:csl_section:intc");
CSL_Status CSL_intcGlobalRestore (
    CSL_IntcGlobalEnableState      prevState
)
{
    _CSL_intc0RestoreFIQ((_CSL_Intc0FiqEnableState)((prevState & 2) >> 1));
    _CSL_intc0RestoreIRQ((_CSL_Intc0IrqEnableState)(prevState & 1));

    return CSL_SOK;
}