ref: f1aa66eb2adfb93167a54902d8e5fe30ab6bea98
parent: 64d062acdb9ed71cc251c69a08ee03e6c5bfcaaf
author: cinap_lenrek <cinap_lenrek@felloff.net>
date: Sun Oct 29 11:18:08 EDT 2023
imx8: use generic 9/arm64/fpu.c
--- a/sys/src/9/imx8/fpu.c
+++ /dev/null
@@ -1,289 +1,0 @@
-#include "u.h"
-#include "../port/lib.h"
-#include "mem.h"
-#include "dat.h"
-#include "fns.h"
-
-#include "ureg.h"
-#include "sysreg.h"
-
-/* libc */
-extern ulong getfcr(void);
-extern void setfcr(ulong fcr);
-extern ulong getfsr(void);
-extern void setfsr(ulong fsr);
-
-static FPsave fpsave0;
-
-static void
-fpsave(FPsave *p)
-{
- p->control = getfcr();
- p->status = getfsr();
- fpsaveregs(p->regs);
- fpoff();
-}
-
-static void
-fprestore(FPsave *p)
-{
- fpon();
- setfcr(p->control);
- setfsr(p->status);
- fploadregs(p->regs);
-}
-
-static void
-fpinit(void)
-{
- fprestore(&fpsave0);
-}
-
-void
-fpuinit(void)
-{
- m->fpstate = FPinit;
- m->fpsave = nil;
- fpoff();
-}
-
-static FPsave*
-fpalloc(void)
-{
- FPsave *save;
-
- while((save = mallocalign(sizeof(FPsave), 16, 0, 0)) == nil){
- spllo();
- resrcwait("no memory for FPsave");
- splhi();
- }
- return save;
-}
-
-static void
-fpfree(FPsave *save)
-{
- free(save);
-}
-
-
-/*
- * Protect or save FPU state and setup new state
- * (lazily in the case of user process) for the kernel.
- * All syscalls, traps and interrupts (except mathtrap()!)
- * are handled between fpukenter() and fpukexit(),
- * so they can use floating point and vector instructions.
- */
-FPsave*
-fpukenter(Ureg*)
-{
- if(up == nil){
- switch(m->fpstate){
- case FPactive:
- fpsave(m->fpsave);
- /* wet floor */
- case FPinactive:
- m->fpstate = FPinit;
- return m->fpsave;
- }
- return nil;
- }
-
- switch(up->fpstate){
- case FPactive:
- up->fpstate = FPprotected;
- fpoff();
- /* wet floor */
- case FPprotected:
- return nil;
- }
-
- switch(up->kfpstate){
- case FPactive:
- fpsave(up->kfpsave);
- /* wet floor */
- case FPinactive:
- up->kfpstate = FPinit;
- return up->kfpsave;
- }
- return nil;
-}
-
-void
-fpukexit(Ureg *ureg, FPsave *save)
-{
- if(up == nil){
- switch(m->fpstate){
- case FPactive:
- fpoff();
- /* wet floor */
- case FPinactive:
- fpfree(m->fpsave);
- m->fpstate = FPinit;
- }
- m->fpsave = save;
- if(save != nil)
- m->fpstate = FPinactive;
- return;
- }
-
- if(up->fpstate == FPprotected){
- if(userureg(ureg)){
- up->fpstate = FPactive;
- fpon();
- }
- return;
- }
-
- switch(up->kfpstate){
- case FPactive:
- fpoff();
- /* wet floor */
- case FPinactive:
- fpfree(up->kfpsave);
- up->kfpstate = FPinit;
- }
- up->kfpsave = save;
- if(save != nil)
- up->kfpstate = FPinactive;
-}
-
-void
-fpuprocsetup(Proc *p)
-{
- p->fpstate = FPinit;
-}
-
-void
-fpuprocfork(Proc *p)
-{
- int s;
-
- s = splhi();
- switch(up->fpstate & ~FPillegal){
- case FPprotected:
- fpon();
- /* wet floor */
- case FPactive:
- fpsave(up->fpsave);
- up->fpstate = FPinactive;
- /* wet floor */
- case FPinactive:
- if(p->fpsave == nil)
- p->fpsave = fpalloc();
- memmove(p->fpsave, up->fpsave, sizeof(FPsave));
- p->fpstate = FPinactive;
- }
- splx(s);
-}
-
-void
-fpuprocsave(Proc *p)
-{
- if(p->state == Moribund){
- if(p->fpstate == FPactive || p->kfpstate == FPactive)
- fpoff();
- fpfree(p->fpsave);
- fpfree(p->kfpsave);
- p->fpsave = p->kfpsave = nil;
- p->fpstate = p->kfpstate = FPinit;
- return;
- }
- if(p->kfpstate == FPactive){
- fpsave(p->kfpsave);
- p->kfpstate = FPinactive;
- return;
- }
- if(p->fpstate == FPprotected)
- fpon();
- else if(p->fpstate != FPactive)
- return;
- fpsave(p->fpsave);
- p->fpstate = FPinactive;
-}
-
-void
-fpuprocrestore(Proc*)
-{
- /*
- * when the scheduler switches,
- * we can discard its fp state.
- */
- switch(m->fpstate){
- case FPactive:
- fpoff();
- /* wet floor */
- case FPinactive:
- fpfree(m->fpsave);
- m->fpsave = nil;
- m->fpstate = FPinit;
- }
-}
-
-void
-mathtrap(Ureg *ureg)
-{
- if(!userureg(ureg)){
- if(up == nil){
- switch(m->fpstate){
- case FPinit:
- m->fpsave = fpalloc();
- m->fpstate = FPactive;
- fpinit();
- break;
- case FPinactive:
- fprestore(m->fpsave);
- m->fpstate = FPactive;
- break;
- default:
- panic("floating point error in irq");
- }
- return;
- }
-
- if(up->fpstate == FPprotected){
- fpon();
- fpsave(up->fpsave);
- up->fpstate = FPinactive;
- }
-
- switch(up->kfpstate){
- case FPinit:
- up->kfpsave = fpalloc();
- up->kfpstate = FPactive;
- fpinit();
- break;
- case FPinactive:
- fprestore(up->kfpsave);
- up->kfpstate = FPactive;
- break;
- default:
- panic("floating point error in trap");
- }
- return;
- }
-
- if(up->fpstate & FPillegal){
- postnote(up, 1, "sys: floating point in note handler", NDebug);
- return;
- }
- switch(up->fpstate){
- case FPinit:
- if(up->fpsave == nil)
- up->fpsave = fpalloc();
- up->fpstate = FPactive;
- fpinit();
- break;
- case FPinactive:
- fprestore(up->fpsave);
- up->fpstate = FPactive;
- break;
- case FPprotected:
- up->fpstate = FPactive;
- fpon();
- break;
- case FPactive:
- postnote(up, 1, "sys: floating point error", NDebug);
- break;
- }
-}
--- a/sys/src/9/imx8/mkfile
+++ b/sys/src/9/imx8/mkfile
@@ -83,6 +83,10 @@
/$objtype/$p$CONF:D: $p$CONF $p$CONF.u
cp -x $p$CONF $p$CONF.u /$objtype/
+ARM64FILES=`{../port/mkfilelist ../arm64}
+^($ARM64FILES)\.$O:R: '../arm64/\1.c'
+ $CC $CFLAGS -I. -. ../arm64/$stem1.c
+
<../boot/bootmkfile
<../port/portmkfile
<|../port/mkbootrules $CONF