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[src/trunk]: src/sys/arch/powerpc Add a provision for a per-cpu battable. Ea...
details: https://anonhg.NetBSD.org/src/rev/cf6af49ac67c
branches: trunk
changeset: 953049:cf6af49ac67c
user: thorpej <thorpej%NetBSD.org@localhost>
date: Wed Feb 24 16:42:38 2021 +0000
description:
Add a provision for a per-cpu battable. Each CPU starts with the global
one, but this allows CPUs to temporarily switch to an alternate battable
if needed.
diffstat:
sys/arch/powerpc/include/cpu.h | 6 +++++-
sys/arch/powerpc/oea/cpu_subr.c | 12 ++++++++----
sys/arch/powerpc/oea/genassym.cf | 3 ++-
sys/arch/powerpc/powerpc/trap_subr.S | 26 +++++++++++++++++++-------
4 files changed, 34 insertions(+), 13 deletions(-)
diffs (151 lines):
diff -r 38b8bf451797 -r cf6af49ac67c sys/arch/powerpc/include/cpu.h
--- a/sys/arch/powerpc/include/cpu.h Wed Feb 24 09:10:12 2021 +0000
+++ b/sys/arch/powerpc/include/cpu.h Wed Feb 24 16:42:38 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: cpu.h,v 1.116 2021/02/03 10:37:05 rin Exp $ */
+/* $NetBSD: cpu.h,v 1.117 2021/02/24 16:42:38 thorpej Exp $ */
/*
* Copyright (C) 1999 Wolfgang Solfrank.
@@ -94,6 +94,10 @@
struct lwp *ci_onproc; /* current user LWP / kthread */
struct pcb *ci_curpcb;
struct pmap *ci_curpm;
+#if defined(PPC_OEA) || defined(PPC_OEA601) || defined(PPC_OEA64) || \
+ defined(PPC_OEA64_BRIDGE) || defined(MODULAR) || defined(_MODULE)
+ void *ci_battable; /* BAT table in use by this CPU */
+#endif
struct lwp *ci_softlwps[SOFTINT_COUNT];
int ci_cpuid; /* from SPR_PIR */
diff -r 38b8bf451797 -r cf6af49ac67c sys/arch/powerpc/oea/cpu_subr.c
--- a/sys/arch/powerpc/oea/cpu_subr.c Wed Feb 24 09:10:12 2021 +0000
+++ b/sys/arch/powerpc/oea/cpu_subr.c Wed Feb 24 16:42:38 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: cpu_subr.c,v 1.104 2020/07/06 10:31:23 rin Exp $ */
+/* $NetBSD: cpu_subr.c,v 1.105 2021/02/24 16:42:38 thorpej Exp $ */
/*-
* Copyright (c) 2001 Matt Thomas.
@@ -34,7 +34,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: cpu_subr.c,v 1.104 2020/07/06 10:31:23 rin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: cpu_subr.c,v 1.105 2021/02/24 16:42:38 thorpej Exp $");
#include "sysmon_envsys.h"
@@ -235,24 +235,27 @@
{ "", 0, REVFMT_HEX }
};
+#include <powerpc/oea/bat.h>
+extern struct bat battable[];
+
#ifdef MULTIPROCESSOR
struct cpu_info cpu_info[CPU_MAXNUM] = {
[0] = {
.ci_curlwp = &lwp0,
+ .ci_battable = battable,
},
};
volatile struct cpu_hatch_data *cpu_hatch_data;
volatile int cpu_hatch_stack;
#define HATCH_STACK_SIZE 0x1000
extern int ticks_per_intr;
-#include <powerpc/oea/bat.h>
#include <powerpc/pic/picvar.h>
#include <powerpc/pic/ipivar.h>
-extern struct bat battable[];
#else
struct cpu_info cpu_info[1] = {
[0] = {
.ci_curlwp = &lwp0,
+ .ci_battable = battable,
},
};
#endif /*MULTIPROCESSOR*/
@@ -1329,6 +1332,7 @@
ci->ci_curlwp = ci->ci_data.cpu_idlelwp;
ci->ci_curpcb = lwp_getpcb(ci->ci_curlwp);
ci->ci_curpm = ci->ci_curpcb->pcb_pm;
+ ci->ci_battable = battable;
cpu_hatch_data = h;
h->hatch_running = 0;
diff -r 38b8bf451797 -r cf6af49ac67c sys/arch/powerpc/oea/genassym.cf
--- a/sys/arch/powerpc/oea/genassym.cf Wed Feb 24 09:10:12 2021 +0000
+++ b/sys/arch/powerpc/oea/genassym.cf Wed Feb 24 16:42:38 2021 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: genassym.cf,v 1.28 2020/07/06 09:34:17 rin Exp $
+# $NetBSD: genassym.cf,v 1.29 2021/02/24 16:42:38 thorpej Exp $
#
# Copyright (C) 1995, 1996 Wolfgang Solfrank.
@@ -66,6 +66,7 @@
define PM_KERNELSR offsetof(struct pmap, pm_sr[KERNEL_SR])
endif
+define CI_BATTABLE offsetof(struct cpu_info, ci_battable)
define CI_TEMPSAVE offsetof(struct cpu_info, ci_savearea[CI_SAVETEMP])
define CI_DDBSAVE offsetof(struct cpu_info, ci_savearea[CI_SAVEDDB])
define CI_DISISAVE offsetof(struct cpu_info, ci_savearea[CI_SAVEMMU])
diff -r 38b8bf451797 -r cf6af49ac67c sys/arch/powerpc/powerpc/trap_subr.S
--- a/sys/arch/powerpc/powerpc/trap_subr.S Wed Feb 24 09:10:12 2021 +0000
+++ b/sys/arch/powerpc/powerpc/trap_subr.S Wed Feb 24 16:42:38 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: trap_subr.S,v 1.84 2020/07/12 21:18:01 rin Exp $ */
+/* $NetBSD: trap_subr.S,v 1.85 2021/02/24 16:42:38 thorpej Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
@@ -268,14 +268,20 @@
rlwinm %r31,%r31,3+(32-BAT_ADDR_SHIFT),BAT_ADDR_SHIFT-3,28
/* get segment * 8 */
+ /* Get address of this CPU's current battable */
+ GET_CPUINFO(%r30)
+ ldreg %r30,CI_BATTABLE(%r30)
+
+ /* Add offset to the slot we care about. */
+ add %r31,%r31,%r30
+
/* get batu */
- addis %r31,%r31,_C_LABEL(battable)@ha
- ldreg %r30,_C_LABEL(battable)@l(%r31)
+ ldreg %r30,0(%r31)
mtcr %r30
bf 30,1f /* branch if supervisor valid is
false */
/* get batl */
- ldreg %r31,_C_LABEL(battable)+SZREG@l(%r31)
+ ldreg %r31,SZREG(%r31)
/* We randomly use the highest two bat registers here */
mftb %r28
mtcr %r28
@@ -363,15 +369,21 @@
mfdar %r31 /* get fault address */
rlwinm %r31,%r31,12,20,28 /* get "segment" battable offset */
+ /* Get address of this CPU's current battable */
+ GET_CPUINFO(%r30)
+ ldreg %r30,CI_BATTABLE(%r30)
+
+ /* Add offset to the slot we care about. */
+ add %r31,%r31,%r30
+
/* get batl */
- addis %r31,%r31,_C_LABEL(battable)@ha
- ldreg %r30,_C_LABEL(battable)+SZREG@l(%r31)
+ ldreg %r30,SZREG(%r31)
mtcr %r30
bf 25,1f /* branch if Valid is false,
presently assumes supervisor only */
/* get batu */
- ldreg %r31,_C_LABEL(battable)@l(%r31)
+ ldreg %r31,0(%r31)
/* We randomly use the highest two bat registers here */
mfspr %r28,SPR_RTCL_R
andi. %r28,%r28,128
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