diosmios/asm/CARDFreeBlocks.S

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326 B
ArmAsm
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#include <asm.h>
#
# r3 chan
# r4 byteNotUsed
# r5 filesNotUsed
CARDFreeBlocks:
mflr %r0
cmpwi %r3, 0
beq CARDPresent
li %r3, -3
b end
CARDPresent:
lis %r3, 0x7F
addi %r3, %r3, 0x6000
stw %r3, 0(%r4)
li %r3, 16
stw %r3, 0(%r5)
li %r3, 0
end:
mtlr %r0
blr