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| author | Sergei Shtylyov <sshtylyov@ru.mvista.com> | 2006-05-26 19:44:54 +0400 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2006-06-06 00:15:13 +0100 |
| commit | 9370b35175ca43fad7d24bc7b391473f3becbee8 (patch) | |
| tree | 4d1f3e7a0708c86da26720288711f8702b00b601 /arch/mips/au1000/common | |
| parent | cac4bcbce0e800f2219a27b66aaeb4a33f2e3dbc (diff) | |
| download | lwn-9370b35175ca43fad7d24bc7b391473f3becbee8.tar.gz lwn-9370b35175ca43fad7d24bc7b391473f3becbee8.zip | |
[MIPS] Save write-only Config.OD from being clobbered
Save the Config.OD bit from being clobbered by coherency_setup(). This
bit, when set, fixes various errata in the early steppings of Au1x00
SOCs. Unfortunately, the bit was write-only on the most early of them.
In addition, also restore the bit after a wakeup from sleep.
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/au1000/common')
| -rw-r--r-- | arch/mips/au1000/common/sleeper.S | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/mips/au1000/common/sleeper.S b/arch/mips/au1000/common/sleeper.S index 44dac3b0df3b..683d9da84b66 100644 --- a/arch/mips/au1000/common/sleeper.S +++ b/arch/mips/au1000/common/sleeper.S @@ -112,6 +112,11 @@ sdsleep: mtc0 k0, CP0_PAGEMASK lw k0, 0x14(sp) mtc0 k0, CP0_CONFIG + + /* We need to catch the ealry Alchemy SOCs with + * the write-only Config[OD] bit and set it back to one... + */ + jal au1x00_fixup_config_od lw $1, PT_R1(sp) lw $2, PT_R2(sp) lw $3, PT_R3(sp) |