ref: e2a17587b92ec63ffae3a9ec777ac8d89da5a543
parent: f1aa66eb2adfb93167a54902d8e5fe30ab6bea98
author: cinap_lenrek <[email protected]>
date: Sun Oct 29 11:19:58 EDT 2023
imx8: use generic 9/arm64/sysreg.c
--- a/sys/src/9/imx8/sysreg.c
+++ /dev/null
@@ -1,58 +1,0 @@
-/*
- * ARMv8 system registers
- * mainly to cope with arm hard-wiring register numbers into instructions.
- *
- * these routines must be callable from KZERO.
- *
- * on a multiprocessor, process switching to another cpu is assumed
- * to be inhibited by the caller as these registers are local to the cpu.
- */
-#include "u.h"
-#include "../port/lib.h"
-#include "mem.h"
-#include "dat.h"
-#include "fns.h"
-
-static void*
-mkinstr(ulong wd)
-{
- static ulong ib[256], *ep[MAXMACH+1];
- static Lock lk;
- ulong *ip, *ie;
-
- ie = ep[m->machno];
- for(ip = ib; ip < ie; ip += 2)
- if(*ip == wd)
- return ip;
-
- ilock(&lk);
- ie = ep[MAXMACH];
- for(; ip < ie; ip += 2)
- if(*ip == wd)
- goto Found;
- if(ip >= &ib[nelem(ib)])
- panic("mkinstr: out of instrucuction buffer");
- ip[0] = wd;
- ip[1] = 0xd65f03c0; // RETURN
- ep[MAXMACH] = ie = ip + 2;
- cachedwbinvse(ip, 2*sizeof(*ip));
-Found:
- iunlock(&lk);
- cacheiinv();
- ep[m->machno] = ie;
- return ip;
-}
-
-uvlong
-sysrd(ulong spr)
-{
- uvlong (*fp)(void) = mkinstr(0xd5380000UL | spr);
- return fp();
-}
-
-void
-syswr(ulong spr, uvlong val)
-{
- void (*fp)(uvlong) = mkinstr(0xd5180000UL | spr);
- fp(val);
-}