Module Name: src
Committed By: reinoud
Date: Mon Sep 12 12:24:34 UTC 2011
Modified Files:
src/sys/arch/usermode/include: intr.h
src/sys/arch/usermode/usermode: intr.c machdep.c
Log Message:
Implement spl level based priority interrupt controller in software
To generate a diff of this commit:
cvs rdiff -u -r1.3 -r1.4 src/sys/arch/usermode/include/intr.h
cvs rdiff -u -r1.4 -r1.5 src/sys/arch/usermode/usermode/intr.c
cvs rdiff -u -r1.29 -r1.30 src/sys/arch/usermode/usermode/machdep.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/usermode/include/intr.h
diff -u src/sys/arch/usermode/include/intr.h:1.3 src/sys/arch/usermode/include/intr.h:1.4
--- src/sys/arch/usermode/include/intr.h:1.3 Sun Sep 4 21:08:18 2011
+++ src/sys/arch/usermode/include/intr.h Mon Sep 12 12:24:34 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: intr.h,v 1.3 2011/09/04 21:08:18 jmcneill Exp $ */
+/* $NetBSD: intr.h,v 1.4 2011/09/12 12:24:34 reinoud Exp $ */
/*-
* Copyright (c) 2007 Jared D. McNeill <jmcne...@invisible.ca>
@@ -31,8 +31,10 @@
#include <machine/intrdefs.h>
+void splinit(void);
int splraise(int);
void spllower(int);
+void spl_intr(int x, void (*func)(void *), void *arg);
#define spl0() spllower(IPL_NONE)
#define splx(x) spllower(x)
Index: src/sys/arch/usermode/usermode/intr.c
diff -u src/sys/arch/usermode/usermode/intr.c:1.4 src/sys/arch/usermode/usermode/intr.c:1.5
--- src/sys/arch/usermode/usermode/intr.c:1.4 Thu Sep 8 11:13:03 2011
+++ src/sys/arch/usermode/usermode/intr.c Mon Sep 12 12:24:34 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: intr.c,v 1.4 2011/09/08 11:13:03 jmcneill Exp $ */
+/* $NetBSD: intr.c,v 1.5 2011/09/12 12:24:34 reinoud Exp $ */
/*-
* Copyright (c) 2011 Jared D. McNeill <jmcne...@invisible.ca>
@@ -27,14 +27,16 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: intr.c,v 1.4 2011/09/08 11:13:03 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: intr.c,v 1.5 2011/09/12 12:24:34 reinoud Exp $");
#include <sys/types.h>
#include <machine/intr.h>
#include <machine/thunk.h>
-/* #define INTR_USE_SIGPROCMASK */
+//#define INTR_USE_SIGPROCMASK
+
+#define MAX_QUEUED_EVENTS 64
static int usermode_x = IPL_NONE;
@@ -42,6 +44,46 @@
static bool block_sigalrm = false;
#endif
+
+struct spl_intr_event {
+ void (*func)(void *);
+ void *arg;
+};
+
+struct spl_intr_event spl_intrs[IPL_HIGH+1][MAX_QUEUED_EVENTS];
+int spl_intr_wr[IPL_HIGH+1];
+int spl_intr_rd[IPL_HIGH+1];
+
+void
+splinit(void)
+{
+ int i;
+ for (i = 0; i <= IPL_HIGH; i++) {
+ spl_intr_rd[i] = 1;
+ spl_intr_wr[i] = 1;
+ }
+}
+
+void
+spl_intr(int x, void (*func)(void *), void *arg)
+{
+ struct spl_intr_event *spli;
+
+ if (x >= usermode_x) {
+ func(arg);
+ return;
+ }
+
+ //printf("\nX : %d\n", x);
+ spli = &spl_intrs[x][spl_intr_wr[x]];
+ spli->func = func;
+ spli->arg = arg;
+
+ spl_intr_wr[x] = (spl_intr_wr[x] + 1) % MAX_QUEUED_EVENTS;
+ if (spl_intr_wr[x] == spl_intr_rd[x])
+ panic("%s: spl list %d full!\n", __func__, x);
+}
+
int
splraise(int x)
{
@@ -64,8 +106,24 @@
void
spllower(int x)
{
- if (usermode_x > x)
+ struct spl_intr_event *spli;
+ int y;
+
+ /* `eat' interrupts that came by until we got back to x */
+ if (usermode_x > x) {
+ for (y = usermode_x; y >= x; y--) {
+ while (spl_intr_rd[y] != spl_intr_wr[y]) {
+ // printf("spl y %d firing\n", y);
+ spli = &spl_intrs[y][spl_intr_rd[y]];
+ if (!spli->func)
+ panic("%s: spli->func is NULL for ipl %d, rd %d, wr %d\n",
+ __func__, y, spl_intr_rd[y], spl_intr_wr[y]);
+ spli->func(spli->arg);
+ spl_intr_rd[y] = (spl_intr_rd[y] + 1) % MAX_QUEUED_EVENTS;
+ }
+ }
usermode_x = x;
+ }
#ifdef INTR_USE_SIGPROCMASK
if (x < IPL_SCHED && block_sigalrm) {
Index: src/sys/arch/usermode/usermode/machdep.c
diff -u src/sys/arch/usermode/usermode/machdep.c:1.29 src/sys/arch/usermode/usermode/machdep.c:1.30
--- src/sys/arch/usermode/usermode/machdep.c:1.29 Fri Sep 9 20:06:04 2011
+++ src/sys/arch/usermode/usermode/machdep.c Mon Sep 12 12:24:34 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: machdep.c,v 1.29 2011/09/09 20:06:04 reinoud Exp $ */
+/* $NetBSD: machdep.c,v 1.30 2011/09/12 12:24:34 reinoud Exp $ */
/*-
* Copyright (c) 2011 Reinoud Zandijk <rein...@netbsd.org>
@@ -32,7 +32,7 @@
#include "opt_urkelvisor.h"
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.29 2011/09/09 20:06:04 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.30 2011/09/12 12:24:34 reinoud Exp $");
#include <sys/types.h>
#include <sys/param.h>
@@ -113,6 +113,7 @@
urkelvisor_init();
#endif
+ splinit();
splraise(IPL_HIGH);
kernmain();
