mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-05 14:07:30 +02:00
fff36017cf
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29264 3c298f89-4303-0410-b956-a3cf2f4a3e73
156 lines
3.9 KiB
Diff
156 lines
3.9 KiB
Diff
From d9a056919c4fa46cd9e094f969032bd4e15bffef Mon Sep 17 00:00:00 2001
|
|
From: Ralf Baechle <ralf@linux-mips.org>
|
|
Date: Sat, 28 May 2011 15:27:59 +0100
|
|
Subject: [PATCH] MIPS: Malta: Fix crash SMP kernel on non-CMP systems.
|
|
|
|
Since 6be63bbbdab66b9185dc6f67c8b1bacb6f37f946 (lmo) rsp.
|
|
af3a1f6f4813907e143f87030cde67a9971db533 (kernel.org) the Malta code does
|
|
no longer probe for presence of GCMP if CMP is not configured. This means
|
|
that the variable gcmp_present well be left at its default value of -1
|
|
which normally is meant to indicate that GCMP has not yet been mmapped.
|
|
This non-zero value is now interpreted as GCMP being present resulting
|
|
in a write attempt to a GCMP register resulting in a crash.
|
|
|
|
Reported and a build fix on top of my fix by Rob Landley <rob@landley.net>.
|
|
|
|
Reported-by: Rob Landley <rob@landley.net>
|
|
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
|
Patchwork: https://patchwork.linux-mips.org/patch/2413/
|
|
(cherry picked from commit c3ddf592134eaab38d051b2e7b23e81201ae423a)
|
|
---
|
|
arch/mips/include/asm/smp-ops.h | 41 +++++++++++++++++++++++++++--
|
|
arch/mips/mipssim/sim_setup.c | 17 ++++++------
|
|
arch/mips/mti-malta/malta-init.c | 14 +++++-----
|
|
arch/mips/pmc-sierra/msp71xx/msp_setup.c | 8 ++---
|
|
4 files changed, 56 insertions(+), 24 deletions(-)
|
|
|
|
--- a/arch/mips/include/asm/smp-ops.h
|
|
+++ b/arch/mips/include/asm/smp-ops.h
|
|
@@ -56,8 +56,43 @@ static inline void register_smp_ops(stru
|
|
|
|
#endif /* !CONFIG_SMP */
|
|
|
|
-extern struct plat_smp_ops up_smp_ops;
|
|
-extern struct plat_smp_ops cmp_smp_ops;
|
|
-extern struct plat_smp_ops vsmp_smp_ops;
|
|
+static inline int register_up_smp_ops(void)
|
|
+{
|
|
+#ifdef CONFIG_SMP_UP
|
|
+ extern struct plat_smp_ops up_smp_ops;
|
|
+
|
|
+ register_smp_ops(&up_smp_ops);
|
|
+
|
|
+ return 0;
|
|
+#else
|
|
+ return -ENODEV;
|
|
+#endif
|
|
+}
|
|
+
|
|
+static inline int register_cmp_smp_ops(void)
|
|
+{
|
|
+#ifdef CONFIG_MIPS_CMP
|
|
+ extern struct plat_smp_ops cmp_smp_ops;
|
|
+
|
|
+ register_smp_ops(&cmp_smp_ops);
|
|
+
|
|
+ return 0;
|
|
+#else
|
|
+ return -ENODEV;
|
|
+#endif
|
|
+}
|
|
+
|
|
+static inline int register_vsmp_smp_ops(void)
|
|
+{
|
|
+#ifdef CONFIG_MIPS_MT_SMP
|
|
+ extern struct plat_smp_ops vsmp_smp_ops;
|
|
+
|
|
+ register_smp_ops(&vsmp_smp_ops);
|
|
+
|
|
+ return 0;
|
|
+#else
|
|
+ return -ENODEV;
|
|
+#endif
|
|
+}
|
|
|
|
#endif /* __ASM_SMP_OPS_H */
|
|
--- a/arch/mips/mipssim/sim_setup.c
|
|
+++ b/arch/mips/mipssim/sim_setup.c
|
|
@@ -59,18 +59,17 @@ void __init prom_init(void)
|
|
|
|
prom_meminit();
|
|
|
|
-#ifdef CONFIG_MIPS_MT_SMP
|
|
- if (cpu_has_mipsmt)
|
|
- register_smp_ops(&vsmp_smp_ops);
|
|
- else
|
|
- register_smp_ops(&up_smp_ops);
|
|
-#endif
|
|
+ if (cpu_has_mipsmt) {
|
|
+ if (!register_vsmp_smp_ops())
|
|
+ return;
|
|
+
|
|
#ifdef CONFIG_MIPS_MT_SMTC
|
|
- if (cpu_has_mipsmt)
|
|
register_smp_ops(&ssmtc_smp_ops);
|
|
- else
|
|
- register_smp_ops(&up_smp_ops);
|
|
+ return;
|
|
#endif
|
|
+ }
|
|
+
|
|
+ register_up_smp_ops();
|
|
}
|
|
|
|
static void __init serial_init(void)
|
|
--- a/arch/mips/mti-malta/malta-init.c
|
|
+++ b/arch/mips/mti-malta/malta-init.c
|
|
@@ -28,6 +28,7 @@
|
|
#include <asm/io.h>
|
|
#include <asm/system.h>
|
|
#include <asm/cacheflush.h>
|
|
+#include <asm/smp-ops.h>
|
|
#include <asm/traps.h>
|
|
|
|
#include <asm/gcmpregs.h>
|
|
@@ -358,15 +359,14 @@ void __init prom_init(void)
|
|
#ifdef CONFIG_SERIAL_8250_CONSOLE
|
|
console_config();
|
|
#endif
|
|
-#ifdef CONFIG_MIPS_CMP
|
|
/* Early detection of CMP support */
|
|
if (gcmp_probe(GCMP_BASE_ADDR, GCMP_ADDRSPACE_SZ))
|
|
- register_smp_ops(&cmp_smp_ops);
|
|
- else
|
|
-#endif
|
|
-#ifdef CONFIG_MIPS_MT_SMP
|
|
- register_smp_ops(&vsmp_smp_ops);
|
|
-#endif
|
|
+ if (!register_cmp_smp_ops())
|
|
+ return;
|
|
+
|
|
+ if (!register_vsmp_smp_ops())
|
|
+ return;
|
|
+
|
|
#ifdef CONFIG_MIPS_MT_SMTC
|
|
register_smp_ops(&msmtc_smp_ops);
|
|
#endif
|
|
--- a/arch/mips/pmc-sierra/msp71xx/msp_setup.c
|
|
+++ b/arch/mips/pmc-sierra/msp71xx/msp_setup.c
|
|
@@ -228,13 +228,11 @@ void __init prom_init(void)
|
|
*/
|
|
msp_serial_setup();
|
|
|
|
-#ifdef CONFIG_MIPS_MT_SMP
|
|
- register_smp_ops(&vsmp_smp_ops);
|
|
-#endif
|
|
-
|
|
+ if (register_vsmp_smp_ops()) {
|
|
#ifdef CONFIG_MIPS_MT_SMTC
|
|
- register_smp_ops(&msp_smtc_smp_ops);
|
|
+ register_smp_ops(&msp_smtc_smp_ops);
|
|
#endif
|
|
+ }
|
|
|
|
#ifdef CONFIG_PMCTWILED
|
|
/*
|