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INITi_DetectMainMemorySizeを最新のSDKのものに更新

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git-svn-id: file:///Users/lillianskinner/Downloads/platinum/twl/TwlIPL/trunk@1161 b08762b0-b915-fc4b-9d8c-17b2551a87ff
This commit is contained in:
yutaka 2008-04-16 07:12:03 +00:00
parent 53786510bb
commit 85fa19095e
1 changed files with 47 additions and 64 deletions
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111
build/libraries/init/ARM7/crt0_firm.c
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@ -557,81 +557,64 @@ static asm void INITi_CopySysConfig( void )
/*---------------------------------------------------------------------------*
Name: INITi_DetectMainMemorySize
Description: detect main memory size.
result is written into (u32*)HW_MMEMCHECKER_SUB.
value is [OS_CONSOLE_SIZE_4MB|OS_CONSOLE_SIZE_8MB|
OS_CONSOLE_SIZE_16MB|OS_CONSOLE_SIZE_32MB]
Arguments: None.
Returns: None.
Description: メインメモリサイズを調査する。
調査結果は (u16*)HW_MMEMCHECER_SUB に格納される。
格納される値は [OS_CONSOLE_SIZE_16MB|OS_CONSOLE_SIZE_32B]
NOTE: プラットフォームが NITRO の場合は考慮していない。
Arguments: なし。
Returns: なし。
*---------------------------------------------------------------------------*/
#define OSi_IMAGE_DIFFERENCE 0x400000
#define OSi_IMAGE_DIFFERENCE2 0xb000000
#define OSi_DETECT_NITRO_MASK (REG_SND_SMX_CNT_E_MASK | REG_SND_SMX_CNT_FSEL_MASK)
#define OSi_DETECT_NITRO_VAL (REG_SND_SMX_CNT_E_MASK)
#define OSi_IMAGE_DIFFERENCE2 0xb000000
#define OSi_DETECT_NITRO_MASK (REG_SND_SMX_CNT_E_MASK | REG_SND_SMX_CNT_FSEL_MASK)
#define OSi_DETECT_NITRO_VAL (REG_SND_SMX_CNT_E_MASK)
static asm void INITi_DetectMainMemorySize( void )
#define OSi_CHECKNUM1 0x55
#define OSi_CHECKNUM2 0xaa
#define OSi_100usWAIT 3352 // 100us = 3351.4cycles(33.514MHz)
static asm void
INITi_DetectMainMemorySize(void)
{
stmfd sp!, {r4,lr}
ldr r2, =HW_MMEMCHECKER_SUB
add r3, r2, #OSi_IMAGE_DIFFERENCE2
mov r0, #OS_CONSOLE_SIZE_16MB
//---- detect memory size
#if 0
mov r4, #OS_CONSOLE_SIZE_4MB
mov r1, #0
/* OSi_CHECKNUM1 (0x55) 書き込みテスト */
mov r1, #OSi_CHECKNUM1
strb r1, [r3]
ldr r2, =HW_MMEMCHECKER_SUB
sub r3, r2, #OSi_IMAGE_DIFFERENCE
@1:
strh r1, [r2]
ldrh r12, [r3]
cmp r1, r12
bne @2
ldr r2, =OSi_100usWAIT
@1 subs r2, r2, #4
bcs @1
add r1, r1, #1
cmp r1, #2 // check 2 loop
bne @1
ldrb r1, [r3]
cmp r1, #OSi_CHECKNUM1
bne @check_smix
//---- 4MB
b @4
/* OSi_CHECKNUM2 (0xaa) を 書き込みテスト */
mov r1, #OSi_CHECKNUM2
strb r1, [r3]
//---- 8MB or 16MB or 32MB
@2:
// check if running on twl/nitro
bl INITi_IsRunOnTwl
movne r4, #OS_CONSOLE_SIZE_8MB
bne @4
#else
ldr r2, =HW_MMEMCHECKER_SUB
#endif
//---- 16MB or 32MB
mov r1, #0
add r3, r2, #OSi_IMAGE_DIFFERENCE2
@3:
strh r1, [r2]
ldrh r12, [r3]
cmp r1, r12
ldr r2, =OSi_100usWAIT
@2 subs r2, r2, #4
bcs @2
movne r4, #OS_CONSOLE_SIZE_32MB
bne @4
ldrb r1, [r3]
cmp r1, #OSi_CHECKNUM2
moveq r0, #OS_CONSOLE_SIZE_32MB
add r1, r1, #1
cmp r1, #2 // check 2 loop
bne @3
mov r4, #OS_CONSOLE_SIZE_16MB
@4:
//---- check SMX_CNT
ldr r3, =REG_SMX_CNT_ADDR
ldrh r1, [r3]
and r1, r1, #OSi_DETECT_NITRO_MASK
cmp r1, #OSi_DETECT_NITRO_VAL
orreq r4, r4, #OS_CHIPTYPE_SMX_MASK
@check_smix:
/* SMIX レジスタを調査 */
ldr r3, =REG_SMX_CNT_ADDR
ldrh r1, [r3]
and r1, r1, #OSi_DETECT_NITRO_MASK
cmp r1, #OSi_DETECT_NITRO_VAL
orreq r0, r0, #OS_CHIPTYPE_SMX_MASK
strb r4, [r2]
ldmfd sp!, {r4,lr}
bx lr
/* 調査結果を格納 */
ldr r2, =HW_MMEMCHECKER_SUB
strb r0, [r2]
bx lr
}
/*---------------------------------------------------------------------------*