63 lines
887 B
ArmAsm
63 lines
887 B
ArmAsm
#include <asm.h>
|
|
|
|
#
|
|
# r3 chan
|
|
# r4 FileNo
|
|
# r5 FileInfo
|
|
|
|
CARDFastOpen:
|
|
|
|
mflr %r0
|
|
stw %r0, 4(%sp)
|
|
stwu %sp, -0x10(%sp)
|
|
|
|
cmpwi %r3, 0
|
|
bne NoCard
|
|
|
|
#send cmd to DM
|
|
|
|
li %r0, 0
|
|
lis %r7, 0xC000
|
|
addi %r7, %r7, 0x2F60
|
|
#IPC area
|
|
dcbi %r0, %r7
|
|
addi %r7, %r7, 0x20
|
|
dcbi %r0, %r7
|
|
|
|
lis %r7, 0xC000
|
|
lis %r0, 0xC500
|
|
|
|
stw %r0, 0x2F60(%r7)
|
|
stw %r4, 0x2F64(%r7)
|
|
stw %r5, 0x2F68(%r7)
|
|
|
|
li %r0, 3
|
|
stw %r0, 0x2F78(%r7)
|
|
|
|
ready_loop:
|
|
lwz %r0, 0x2F78(%r7)
|
|
cmpwi %r0, 3
|
|
beq ready_loop
|
|
|
|
wait_loop:
|
|
lwz %r0, 0x2F9C(%r7)
|
|
andi. %r0, %r0, 0x14
|
|
cmpwi %r0, 0
|
|
beq wait_loop
|
|
|
|
lwz %r3, 0x2F90(%r7)
|
|
stw %r3, 0x10(%r5)
|
|
stw %r4, 0x04(%r5)
|
|
|
|
lwz %r3, 0x2F94(%r7)
|
|
b end
|
|
|
|
NoCard:
|
|
li %r3, -3
|
|
end:
|
|
|
|
lwz %r0, 0x14(%sp)
|
|
addi %sp, %sp, 0x10
|
|
mtlr %r0
|
|
blr
|