From: Olof Johansson <olof@lixom•net>
To: linuxppc-dev@ozlabs•org
Subject: [patch 25/35] Work around errata 4025
Date: Thu, 05 Jul 2007 12:02:58 -0500 [thread overview]
Message-ID: <20070705170240.257555000@lixom.net> (raw)
In-Reply-To: 20070705170233.258351000@lixom.net
Errata 4025 workaround: A SLB load can in some cases be corrupted. As a workaround,
insert an instruction with sync side effects after the load (in this case it's the
mtmsrd).
Index: 2.6.21/arch/powerpc/kernel/entry_64.S
===================================================================
--- 2.6.21.orig/arch/powerpc/kernel/entry_64.S
+++ 2.6.21/arch/powerpc/kernel/entry_64.S
@@ -395,6 +395,8 @@ BEGIN_FTR_SECTION
slbie r6
slbie r6 /* Workaround POWER5 < DD2.1 issue */
slbmte r7,r0
+ mfmsr r7 /* PA6T Ax workaround */
+ mtmsrd r7
isync
2:
Index: 2.6.21/arch/powerpc/mm/slb.c
===================================================================
--- 2.6.21.orig/arch/powerpc/mm/slb.c
+++ 2.6.21/arch/powerpc/mm/slb.c
@@ -79,7 +79,7 @@ static inline void create_shadowed_slbe(
slb_shadow_update(mk_esid_data(ea, entry), mk_vsid_data(ea, flags),
entry);
- asm volatile("slbmte %0,%1" :
+ asm volatile("slbmte %0,%1 ; mfmsr %0 ; mtmsrd %0" :
: "r" (mk_vsid_data(ea, flags)),
"r" (mk_esid_data(ea, entry))
: "memory" );
@@ -113,8 +113,14 @@ void slb_flush_and_rebolt(void)
"slbia\n"
/* Slot 1 - first VMALLOC segment */
"slbmte %0,%1\n"
+ /* PA6T Ax workaround */
+ "mfmsr %0\n"
+ "mtmsrd %0\n"
/* Slot 2 - kernel stack */
"slbmte %2,%3\n"
+ /* PA6T Ax workaround */
+ "mfmsr %0\n"
+ "mtmsrd %0\n"
"isync"
:: "r"(mk_vsid_data(VMALLOC_START, vflags)),
"r"(mk_esid_data(VMALLOC_START, 1)),
Index: 2.6.21/arch/powerpc/mm/slb_low.S
===================================================================
--- 2.6.21.orig/arch/powerpc/mm/slb_low.S
+++ 2.6.21/arch/powerpc/mm/slb_low.S
@@ -221,6 +221,8 @@ END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISER
* we enter with and the rfid we exit with are context synchronizing.
*/
slbmte r11,r10
+ mfmsr r3
+ mtmsrd r3
/* we're done for kernel addresses */
crclr 4*cr0+eq /* set result to "success" */
--
next prev parent reply other threads:[~2007-07-05 17:03 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-05 17:02 [patch 00/35] PA Semi patch set Olof Johansson
2007-07-05 17:02 ` [patch 01/35] pasemi: rename platform Olof Johansson
2007-07-08 23:52 ` Stephen Rothwell
2007-07-09 0:18 ` Olof Johansson
2007-07-09 7:23 ` Stephen Rothwell
2007-07-09 17:19 ` Olof Johansson
2007-07-09 17:21 ` Olof Johansson
2007-07-05 17:02 ` [patch 02/35] PA Semi EDAC driver Olof Johansson
2007-07-05 17:02 ` [patch 03/35] Change powerpc64 ioaddr_t to u_int Olof Johansson
2007-07-05 17:02 ` [patch 04/35] pasemi_mac: Fix TX interrupt threshold Olof Johansson
2007-07-05 17:02 ` [patch 05/35] pasemi_mac: Clean TX ring in poll Olof Johansson
2007-07-05 17:02 ` [patch 06/35] pasemi_mac: Abstract out register access Olof Johansson
2007-07-05 17:02 ` [patch 07/35] pasemi_mac: stop using the pci config space accessors for register read/writes Olof Johansson
2007-07-26 21:25 ` Marian Balakowicz
2007-07-28 8:35 ` Olof Johansson
2007-08-01 9:27 ` Marian Balakowicz
2007-07-05 17:02 ` [patch 08/35] pasemi_mac: Enable L2 caching of packet headers Olof Johansson
2007-07-05 17:02 ` [patch 09/35] pasemi_mac: Simplify memcpy for short receives Olof Johansson
2007-07-05 17:02 ` [patch 10/35] pasemi_mac: Minor performance tweaks Olof Johansson
2007-07-05 17:02 ` [patch 11/35] pasemi_mac: Reduce locking when cleaning TX ring Olof Johansson
2007-07-05 17:02 ` [patch 12/35] pasemi_mac: Enable LLTX Olof Johansson
2007-07-05 17:02 ` [patch 13/35] Cleanup marvell phy driver init Olof Johansson
2007-07-05 17:02 ` [patch 14/35] Add 88E1112 PHY ID to the marvell driver Olof Johansson
2007-07-05 17:02 ` [patch 15/35] Export HID registers via sysfs Olof Johansson
2007-07-05 17:02 ` [patch 16/35] Electra ide platform glue Olof Johansson
2007-07-05 17:02 ` [patch 17/35] CF driver for PA Semi Electra Olof Johansson
2007-07-05 17:02 ` [patch 18/35] Spread IRQs among cpus by default Olof Johansson
2007-07-05 17:02 ` [patch 19/35] Improve machine check output Olof Johansson
2007-07-05 17:02 ` [patch 20/35] Remove idle_spin function pointer Olof Johansson
2007-07-05 17:02 ` [patch 21/35] Use MSR_PMM to disable profiling of the idle loop Olof Johansson
2007-07-05 17:02 ` [patch 22/35] Work around errata 4111 Olof Johansson
2007-07-05 17:02 ` [patch 23/35] Work around UART erratas Olof Johansson
2007-07-05 17:02 ` [patch 24/35] Work around errata 4628 Olof Johansson
2007-07-05 17:02 ` Olof Johansson [this message]
2007-07-05 17:02 ` [patch 26/35] Work around errata 4713 Olof Johansson
2007-07-05 17:03 ` [patch 27/35] Work around errata 4290 Olof Johansson
2007-07-05 18:50 ` Gabriel Paubert
2007-07-05 19:26 ` Olof Johansson
2007-07-05 17:03 ` [patch 28/35] Work around errata 4712 Olof Johansson
2007-07-05 17:03 ` [patch 29/35] Work around errata 4910 Olof Johansson
2007-07-05 17:03 ` [patch 30/35] Disable PURR on pa6t Olof Johansson
2007-07-05 17:03 ` [patch 31/35] Work around errata 4161 Olof Johansson
2007-07-05 17:03 ` [patch 32/35] Dont reset openpic on init Olof Johansson
2007-07-05 17:03 ` [patch 33/35] Work around errata 5667 Olof Johansson
2007-07-05 17:03 ` [patch 34/35] Work around errata 4505 Olof Johansson
2007-07-05 17:03 ` [patch 35/35] Work around errata 5652 Olof Johansson
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