31 lines
1.0 KiB
C
31 lines
1.0 KiB
C
#ifndef FXCG50_BOOTLOADER_ASM_UTILS_H
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#define FXCG50_BOOTLOADER_ASM_UTILS_H 1
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/* function() : define a function using special indication
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*
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* - the function's name must start with a '_'
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* - the function should start in a 4-aligned address in order to benefit from
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* the ILP (Instruction Level Parallelism) */
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#define function(name) \
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.balign 4 ;\
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.global _ ## name ;\
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_ ## name
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/* FX9860_SYSCALL_TRAMPOLINE - Casio's syscall trampoline address */
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#define FX9860_SYSCALL_TRAMPOLINE 0x80010070
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/* syscall() : helper used to quickly define Casio syscall invokation
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*
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* - the syscall trampoline code is common for all syscall
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* - r0 contain the syscall ID */
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#define syscall(id) \
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mov.l 1f, r2 ;\
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mov.l 2f, r0 ;\
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jmp @r2 ;\
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nop ;\
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.balign 4 ;\
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1: .long FX9860_SYSCALL_TRAMPOLINE ;\
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2: .long id
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#endif /* FXCG50_BOOTLOADER_ASM_UTILS_H */
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