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git-svn-id: file:///Users/lillianskinner/Downloads/platinum/twl/TwlIPL/trunk@23 b08762b0-b915-fc4b-9d8c-17b2551a87ff
115 lines
3.5 KiB
C
115 lines
3.5 KiB
C
/*---------------------------------------------------------------------------*
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Project: TwlIPL - libraries - mi
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File: mi_init_mainMemory.c
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Copyright 2007 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 <firm/mi.h>
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/*---------------------------------------------------------------------------*
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Name: MIi_IsMainMemoryInitialized
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Description:
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Arguments: None
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Returns: None
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*---------------------------------------------------------------------------*/
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BOOL MIi_IsMainMemoryInitialized( void )
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{
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return (BOOL)((reg_MI_EXMEMCNT & REG_MI_EXMEMCNT_CE2_MASK) >> REG_MI_EXMEMCNT_CE2_SHIFT);
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}
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/*---------------------------------------------------------------------------*
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Name: MIi_WaitMainMemoryInitialize
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Description:
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Arguments: None
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Returns: None
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*---------------------------------------------------------------------------*/
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void MIi_WaitMainMemoryInitialize( void )
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{
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while( MIi_IsMainMemoryInitialized() == FALSE )
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{
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}
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}
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/*---------------------------------------------------------------------------*
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Name: MIi_InitMainMemCR
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Description: change mainmem into the burst mode
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Arguments: None
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Returns: None
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*---------------------------------------------------------------------------*/
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#include <nitro/code32.h>
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asm void MIi_InitMainMemCR( void )
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{
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mov r12, lr
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mov r0, #0x8000 // low period 0.97ms
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bl OS_SpinWait
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ldr r3, =REG_EXMEMCNT_ADDR
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mov r1, #REG_MI_EXMEMCNT_CE2_MASK
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ldrh r2, [r3]
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tst r2, r1
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bxne r12
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strh r1, [r3]
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mov r0, #0x8000 // high period 0.97ms
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bl OS_SpinWait
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ldr r3, =HW_WRAM_AREA - 2
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#if PLATFORM == BB
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ldr r0, =MMEM_DCR0_BURST_MODE | MMEM_DCR0_BURST_CONTINUOUS \
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| MMEM_DCR0_PARTIAL_REFRESH_NONE | MMEM_DCR0_SB1
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ldr r1, =MMEM_DCR1_1ST_R4_W3 | MMEM_DCR1_BURST_WRITE | MMEM_DCR1_BURST_LINER \
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| MMEM_DCR1_CLOCK_TRIGGER_UP | MMEM_DCR1_SB1
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ldr r2, =HW_MAIN_MEM | MMEM_DCR2_CLOCK_TRIGGER_UP \
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| MMEM_DCR2_BURST_MODE | MMEM_DCR2_BURST_CONTINUOUS \
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| MMEM_DCR2_1ST_R4_W3 | MMEM_DCR2_BURST_WRITE | MMEM_DCR2_BURST_LINER \
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| MMEM_DCR2_PARTIAL_REFRESH_NONE | MMEM_DCR2_SB1
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ldrh lr, [r3]
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strh lr, [r3]
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strh lr, [r3]
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strh r0, [r3]
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strh r1, [r3]
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ldrh lr, [r2]
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#else // PLATFORM == TS
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ldr r0, =MMEM_TCR0
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ldr r1, =MMEM_TCR1
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ldr r2, =MMEM_TCR2
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ldrh lr, [r3]
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strh lr, [r3]
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strh lr, [r3]
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strh r0, [r3]
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strh r1, [r3]
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strh r2, [r3]
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#endif // PLATFORM == TS
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ldr r3, =REG_EXMEMCNT_ADDR
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mov r1, #REG_MI_EXMEMCNT_IFM_MASK | REG_MI_EXMEMCNT_CE2_MASK
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strh r1, [r3]
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bx r12
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}
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