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subrepo: subdir: "lib/n64-libc" merged: "70270d60" upstream: origin: "https://gitlab.com/mpharoah/n64-libc" branch: "main" commit: "70270d60" git-subrepo: version: "0.4.9" origin: "https://github.com/ingydotnet/git-subrepo" commit: "4f60dd7"
25 lines
776 B
C
25 lines
776 B
C
#include "n64-util.h"
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#include "n64-stdbool.h"
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__attribute__((noinline))
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static n64_bool n64_enable_interrupts() {
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register n64_bool status;
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asm volatile( ".set noat \n\t .align 16 \n\t mfc0 $1, $12 \n\t andi %0, $1, 1 \n\t ori $1, $1, 1 \n\t mtc0 $1, $12" : "=r"( status ) :: "at" );
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return status;
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}
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__attribute__((noinline))
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static n64_bool n64_disable_interrupts() {
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register n64_bool status;
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asm volatile( ".set noat \n\t .align 16 \n\t mfc0 $1, $12 \n\t andi %0, $1, 1 \n\t subu $1, $1, %0 \n\t mtc0 $1, $12" : "=r"( status ) :: "at" );
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return status;
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}
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n64_bool n64_set_interrupts( n64_bool enable ) {
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return enable ? n64_enable_interrupts() : n64_disable_interrupts();
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}
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void n64_await_pi_io() {
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while( *((volatile unsigned int*)0xa4600010u) & 0x3u );
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}
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