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git-svn-id: file:///Volumes/Transfer/gigaleak_20231201/2020-09-30%20-%20paladin.7z/paladin/ctr_firmware@95 b871894f-2f95-9b40-918c-086798483c85
125 lines
3.8 KiB
C
125 lines
3.8 KiB
C
/*---------------------------------------------------------------------------*
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Project: CtrBrom - libraries - OS
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File: os_system.c
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Copyright 2008 Nintendo. All rights reserved.
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These coded instructions, statements, and computer programs contain
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proprietary information of Nintendo of America Inc. and/or Nintendo
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Company Ltd., and are protected by Federal copyright law. They may
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not be disclosed to third parties or copied or duplicated in any form,
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in whole or in part, without the prior written consent of Nintendo.
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$Date:: $
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$Rev$
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$Author$
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*---------------------------------------------------------------------------*/
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#include <brom/os.h>
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#define osTPrintf(...) ((void)0)
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//============================================================================
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// PROCESSER MODE
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//============================================================================
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/*---------------------------------------------------------------------------*
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Name: osGetProcMode
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Description: Get processor mode from CPSR
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Arguments: None.
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Returns: CPU processor mode (field 0x10-0x1f)
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*---------------------------------------------------------------------------*/
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#include <brom/code32.h>
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ASM OSProcMode osGetProcMode( void )
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{
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mrs r0, cpsr
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and r0, r0, #HW_PSR_CPU_MODE_MASK
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bx lr
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}
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#include <brom/codereset.h>
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//============================================================================
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// WAIT
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//============================================================================
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/*---------------------------------------------------------------------------*
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Name: i_osWaitCpuCycles
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Description: Loop and Wait for specified CPU cycles at least
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Arguments: cycles waiting CPU cycle
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Returns: None
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*---------------------------------------------------------------------------*/
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#include <brom/code32.h>
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ASM void i_osWaitCpuCycles( OSCpuCycle cycle )
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{
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sub r0, r0, #(6-2) // subtract call-return overhead and add the margin of 2 cycles
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LSYM(1)
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subs r0, r0, #4 // 1 cycle
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bcs BSYM(1) // 3 cycle
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bx lr
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}
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#include <brom/codereset.h>
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//============================================================================
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// TERMINATE and HALT
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//============================================================================
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/*---------------------------------------------------------------------------*
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Name: osTerminate
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Description: Halt CPU and loop
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Arguments: None
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Returns: -- (Never return)
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*---------------------------------------------------------------------------*/
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void osTerminate(void)
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{
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while (1)
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{
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(void)osDisableInterrupts();
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osHalt();
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}
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}
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/*---------------------------------------------------------------------------*
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Name: osHalt
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Description: Halt CPU
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Arguments: None
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Returns: None
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*---------------------------------------------------------------------------*/
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#include <brom/code32.h>
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ASM void osHalt( void )
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{
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mov r0, #0
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mcr p15, 0, r0, c7, c0, 4
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bx lr
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}
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#include <brom/codereset.h>
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/*---------------------------------------------------------------------------*
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Name: osExit
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Description: Display exit string and Terminate.
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This is useful for 'loadrun' tool command.
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Arguments: status : exit status
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Returns: -- (Never return)
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*---------------------------------------------------------------------------*/
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void osExit(int status)
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{
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#ifdef SDK_FINALROM
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#pragma unused( status )
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#endif
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(void)osDisableInterrupts();
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osTPrintf("\n" OS_EXIT_STRING, status);
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osTerminate();
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}
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