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compiler-rt: Implement __clear_cache() for mips-netbsd

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Alex Rønne Petersen 2025-07-07 00:37:25 +02:00
parent 5209e7e458
commit 9a1e754a58
1 changed files with 20 additions and 0 deletions
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20
lib/compiler_rt/clear_cache.zig
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@ -86,6 +86,26 @@ fn clear_cache(start: usize, end: usize) callconv(.c) void {
const result = std.os.linux.syscall3(.cacheflush, start, end - start, flags);
std.debug.assert(result == 0);
exportIt();
} else if (os == .netbsd and mips) {
// Replace with https://github.com/ziglang/zig/issues/23904 in the future.
const cfa: extern struct {
va: usize,
nbytes: usize,
whichcache: u32,
} = .{
.va = start,
.nbytes = end - start,
.whichcache = 3, // ICACHE | DCACHE
};
asm volatile (
\\ syscall
:
: [_] "{$2}" (165), // nr = SYS_sysarch
[_] "{$4}" (0), // op = MIPS_CACHEFLUSH
[_] "{$5}" (&cfa), // args = &cfa
: "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
);
exportIt();
} else if (mips and os == .openbsd) {
// TODO
//cacheflush(start, (uintptr_t)end - (uintptr_t)start, BCACHE);