ref: bb85d99a02ba60bebcd8509fb1bfec8476ef0047
dir: /9legacy/9_bcm.diff/
diff -urP sys/src/9/bcm/archbcm.c /sys/src/9/bcm/archbcm.c
--- sys/src/9/bcm/archbcm.c Thu Jun 24 18:58:12 2021
+++ /sys/src/9/bcm/archbcm.c Tue Aug 20 11:18:46 2019
@@ -138,7 +138,28 @@
*/
long
-ainc(long *p)
+_xdec(long *p)
+{
+ int s, v;
+
+ s = splhi();
+ v = --*p;
+ splx(s);
+ return v;
+}
+
+void
+_xinc(long *p)
+{
+ int s;
+
+ s = splhi();
+ ++*p;
+ splx(s);
+}
+
+int
+ainc(int *p)
{
int s, v;
@@ -148,8 +169,8 @@
return v;
}
-long
-adec(long *p)
+int
+adec(int *p)
{
int s, v;
diff -urP sys/src/9/bcm/main.c /sys/src/9/bcm/main.c
--- sys/src/9/bcm/main.c Thu Jun 24 18:58:13 2021
+++ /sys/src/9/bcm/main.c Sat Jul 4 10:38:16 2020
@@ -510,6 +510,7 @@
ulong kpages;
uintptr pa;
char *p;
+ extern ulong xmembase, xmempages;
if(0 && (p = getconf("service")) != nil){
if(strcmp(p, "cpu") == 0)
@@ -531,20 +532,24 @@
/*
* pi4 extra memory (beyond video ram) indicated by board id
*/
- switch(getboardrev()&0xF00000){
- case 0xA00000:
+ switch(getboardrev()&0xFFFFFF){
+ case 0xA03111:
break;
- case 0xB00000:
+ case 0xB03111:
+ case 0xB03112:
conf.mem[1].base = 1*GiB;
conf.mem[1].limit = 2*GiB;
break;
- case 0xC00000:
+ case 0xC03111:
+ case 0xC03112:
conf.mem[1].base = 1*GiB;
conf.mem[1].limit = 0xFFF00000;
break;
- case 0xD00000:
+ case 0xD03114:
conf.mem[1].base = 1*GiB;
conf.mem[1].limit = 0xFFF00000;
+ //xmembase = 1<<20; /* 4*GiB / BY2PG */
+ //xmempages = 1<<20; /* as above */
break;
}
if(conf.mem[1].limit > soc.dramsize)
@@ -608,7 +613,7 @@
+ conf.nproc*sizeof(Proc)
+ conf.nimage*sizeof(Image)
+ conf.nswap
- + conf.nswppo*sizeof(Page*);
+ + conf.nswppo*sizeof(Page);
mainmem->maxsize = kpages;
if(!cpuserver)
/*
diff -urP sys/src/9/bcm/screen.c /sys/src/9/bcm/screen.c
--- sys/src/9/bcm/screen.c Thu Jun 24 18:58:13 2021
+++ /sys/src/9/bcm/screen.c Mon May 30 11:38:43 2016
@@ -326,11 +326,6 @@
set = screensize() == 0;
fb = fbinit(set, &xgscreen.r.max.x, &xgscreen.r.max.y, &xgscreen.depth);
if(fb == nil){
- xgscreen.r.max = Pt(640, 480);
- xgscreen.depth = 16;
- fb = fbinit(set, &xgscreen.r.max.x, &xgscreen.r.max.y, &xgscreen.depth);
- }
- if(fb == nil){
print("can't initialise %dx%dx%d framebuffer \n",
xgscreen.r.max.x, xgscreen.r.max.y, xgscreen.depth);
return;
@@ -349,7 +344,7 @@
chan = rgbswap? RGB24 : BGR24;
break;
case 32:
- chan = rgbswap? XRGB32 : XBGR32;
+ chan = ARGB32;
break;
}
memsetchan(&xgscreen, chan);
diff -urP sys/src/9/bcm/taslock.c /sys/src/9/bcm/taslock.c
--- sys/src/9/bcm/taslock.c Thu Jan 1 01:00:00 1970
+++ /sys/src/9/bcm/taslock.c Fri Mar 4 10:49:37 2016
@@ -0,0 +1,257 @@
+#include "u.h"
+#include "../port/lib.h"
+#include "mem.h"
+#include "dat.h"
+#include "fns.h"
+#include "../port/error.h"
+#include "../port/edf.h"
+
+long maxlockcycles;
+long maxilockcycles;
+long cumlockcycles;
+long cumilockcycles;
+ulong maxlockpc;
+ulong maxilockpc;
+
+struct
+{
+ ulong locks;
+ ulong glare;
+ ulong inglare;
+} lockstats;
+
+static void
+inccnt(Ref *r)
+{
+ _xinc(&r->ref);
+}
+
+static int
+deccnt(Ref *r)
+{
+ int x;
+
+ x = _xdec(&r->ref);
+ if(x < 0)
+ panic("deccnt pc=%#p", getcallerpc(&r));
+ return x;
+}
+
+static void
+dumplockmem(char *tag, Lock *l)
+{
+ uchar *cp;
+ int i;
+
+ iprint("%s: ", tag);
+ cp = (uchar*)l;
+ for(i = 0; i < 64; i++)
+ iprint("%2.2ux ", cp[i]);
+ iprint("\n");
+}
+
+void
+lockloop(Lock *l, ulong pc)
+{
+ Proc *p;
+
+ p = l->p;
+ print("lock %#p loop key %#lux pc %#lux held by pc %#lux proc %lud\n",
+ l, l->key, pc, l->pc, p ? p->pid : 0);
+ dumpaproc(up);
+ if(p != nil)
+ dumpaproc(p);
+}
+
+int
+lock(Lock *l)
+{
+ int i;
+ ulong pc;
+
+ pc = getcallerpc(&l);
+
+ lockstats.locks++;
+ if(up)
+ inccnt(&up->nlocks); /* prevent being scheded */
+ if(tas(&l->key) == 0){
+ if(up)
+ up->lastlock = l;
+ l->pc = pc;
+ l->p = up;
+ l->isilock = 0;
+#ifdef LOCKCYCLES
+ l->lockcycles = -lcycles();
+#endif
+ return 0;
+ }
+ if(up)
+ deccnt(&up->nlocks);
+
+ lockstats.glare++;
+ for(;;){
+ lockstats.inglare++;
+ i = 0;
+ while(l->key){
+ if(conf.nmach < 2 && up && up->edf && (up->edf->flags & Admitted)){
+ /*
+ * Priority inversion, yield on a uniprocessor; on a
+ * multiprocessor, the other processor will unlock
+ */
+ print("inversion %#p pc %#lux proc %lud held by pc %#lux proc %lud\n",
+ l, pc, up ? up->pid : 0, l->pc, l->p ? l->p->pid : 0);
+ up->edf->d = todget(nil); /* yield to process with lock */
+ }
+ if(i++ > 100000000){
+ i = 0;
+ lockloop(l, pc);
+ }
+ }
+ if(up)
+ inccnt(&up->nlocks);
+ if(tas(&l->key) == 0){
+ if(up)
+ up->lastlock = l;
+ l->pc = pc;
+ l->p = up;
+ l->isilock = 0;
+#ifdef LOCKCYCLES
+ l->lockcycles = -lcycles();
+#endif
+ return 1;
+ }
+ if(up)
+ deccnt(&up->nlocks);
+ }
+}
+
+void
+ilock(Lock *l)
+{
+ ulong x;
+ ulong pc;
+
+ pc = getcallerpc(&l);
+ lockstats.locks++;
+
+ x = splhi();
+ if(tas(&l->key) != 0){
+ lockstats.glare++;
+ /*
+ * Cannot also check l->pc, l->m, or l->isilock here
+ * because they might just not be set yet, or
+ * (for pc and m) the lock might have just been unlocked.
+ */
+ for(;;){
+ lockstats.inglare++;
+ splx(x);
+ while(l->key)
+ ;
+ x = splhi();
+ if(tas(&l->key) == 0)
+ goto acquire;
+ }
+ }
+acquire:
+ m->ilockdepth++;
+ if(up)
+ up->lastilock = l;
+ l->sr = x;
+ l->pc = pc;
+ l->p = up;
+ l->isilock = 1;
+ l->m = MACHP(m->machno);
+#ifdef LOCKCYCLES
+ l->lockcycles = -lcycles();
+#endif
+}
+
+int
+canlock(Lock *l)
+{
+ if(up)
+ inccnt(&up->nlocks);
+ if(tas(&l->key)){
+ if(up)
+ deccnt(&up->nlocks);
+ return 0;
+ }
+
+ if(up)
+ up->lastlock = l;
+ l->pc = getcallerpc(&l);
+ l->p = up;
+ l->m = MACHP(m->machno);
+ l->isilock = 0;
+#ifdef LOCKCYCLES
+ l->lockcycles = -lcycles();
+#endif
+ return 1;
+}
+
+void
+unlock(Lock *l)
+{
+#ifdef LOCKCYCLES
+ l->lockcycles += lcycles();
+ cumlockcycles += l->lockcycles;
+ if(l->lockcycles > maxlockcycles){
+ maxlockcycles = l->lockcycles;
+ maxlockpc = l->pc;
+ }
+#endif
+ if(l->key == 0)
+ print("unlock: not locked: pc %#p\n", getcallerpc(&l));
+ if(l->isilock)
+ print("unlock of ilock: pc %lux, held by %lux\n", getcallerpc(&l), l->pc);
+ if(l->p != up)
+ print("unlock: up changed: pc %#p, acquired at pc %lux, lock p %#p, unlock up %#p\n", getcallerpc(&l), l->pc, l->p, up);
+ l->m = nil;
+ coherence();
+ l->key = 0;
+ coherence();
+
+ if(up && deccnt(&up->nlocks) == 0 && up->delaysched && islo()){
+ /*
+ * Call sched if the need arose while locks were held
+ * But, don't do it from interrupt routines, hence the islo() test
+ */
+ sched();
+ }
+}
+
+ulong ilockpcs[0x100] = { [0xff] = 1 };
+static int n;
+
+void
+iunlock(Lock *l)
+{
+ ulong sr;
+
+#ifdef LOCKCYCLES
+ l->lockcycles += lcycles();
+ cumilockcycles += l->lockcycles;
+ if(l->lockcycles > maxilockcycles){
+ maxilockcycles = l->lockcycles;
+ maxilockpc = l->pc;
+ }
+ if(l->lockcycles > 2400)
+ ilockpcs[n++ & 0xff] = l->pc;
+#endif
+ if(l->key == 0)
+ print("iunlock: not locked: pc %#p\n", getcallerpc(&l));
+ if(!l->isilock)
+ print("iunlock of lock: pc %#p, held by %#lux\n", getcallerpc(&l), l->pc);
+ if(islo())
+ print("iunlock while lo: pc %#p, held by %#lux\n", getcallerpc(&l), l->pc);
+
+ sr = l->sr;
+ l->m = nil;
+ coherence();
+ l->key = 0;
+ coherence();
+ m->ilockdepth--;
+ if(up)
+ up->lastilock = nil;
+ splx(sr);
+}
diff -urP sys/src/9/port/portfns.h /sys/src/9/port/portfns.h
--- sys/src/9/port/portfns.h Sat Jun 26 21:21:40 2021
+++ /sys/src/9/port/portfns.h Sun Jun 27 13:29:35 2021
@@ -405,6 +405,8 @@
ulong µs(void);
long ainc(long*);
long adec(long*);
+void _xinc(long*);
+long _xdec(long*);
long lcycles(void);
#pragma varargck argpos iprint 1