Zack Buhman
d912278afd
The serial_transfer loader, as long as the target program voluntarily terminates itself at some point, is able to load multiple programs consecutively without requiring a physical power cycle to reload the transfer program from CD. The current example.mk juggles between two different "memory layouts", one for "burn to a physical CD" and another for "load via serial cable". Because the serial_transfer program now relocates itself to the end of system memory, this means the 0x8c010000 area is now usable by programs that are loaded by serial_transfer.
38 lines
631 B
ArmAsm
38 lines
631 B
ArmAsm
.section .text.start
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.global _start
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_start:
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/* set stack pointer */
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mov.l p1ram_end_ptr,r15
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/* mask all interrupts */
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mov.l imask_all,r0
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stc sr,r1
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or r1,r0
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ldc r0,sr
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/* save pr */
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sts.l pr,@-r15
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/* jump to runtime_init */
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mov.l runtime_init_ptr,r0
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jsr @r0
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nop
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/* restore pr */
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lds.l @r15+,pr
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/* jump to main */
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mov.l main_ptr,r0
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jmp @r0
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nop
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.align 4
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p1ram_end_ptr:
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.long __p1ram_end
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imask_all:
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.long 0xf0
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runtime_init_ptr:
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.long _runtime_init
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main_ptr:
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.long _main
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