61 lines
808 B
ArmAsm
61 lines
808 B
ArmAsm
#include <asm.h>
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# issue read command
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#
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# r3 dvdstruct
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# r4 dst
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# r5 cb
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DVDInquiryAsync:
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stwu %sp, -0x10(%sp)
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mflr %r0
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stw %r0, 8(%sp)
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#update dvdstruct
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li %r0, 0
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stw %r0, 0x00(%r3)
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stw %r0, 0x04(%r3)
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stw %r0, 0x0C(%r3)
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#offset
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stw %r0, 0x10(%r3)
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li %r0, 2
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stw %r0, 0x08(%r3)
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li %r0, 0x20
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#TransferSize
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stw %r0, 0x1C(%r3)
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stw %r0, 0x20(%r3)
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#size
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stw %r0, 0x14(%r3)
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#ptr
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stw %r4, 0x18(%r3)
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#cb
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stw %r5, 0x28(%r3)
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#Inquiry reply
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li %r0, 0
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dcbi %r0, %r4
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li %r0, 0x0000
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sth %r0, 0x02(%r4)
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cmpwi %r5, 0
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beq skip_cb
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mtctr %r5
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mr %r4, %r3
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li %r3, 0x20
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bctrl
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skip_cb:
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li %r3, 1
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lwz %r0, 8(%sp)
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mtlr %r0
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addi %sp, %sp, 0x10
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blr
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