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| author | Olav Morken <olavmrk@gmail.com> | 2009-01-23 12:56:32 +0100 |
|---|---|---|
| committer | Haavard Skinnemoen <haavard.skinnemoen@atmel.com> | 2009-02-23 10:34:24 +0100 |
| commit | b423f94063bf04e92047ff85c7e53441eb3b712b (patch) | |
| tree | bbc30cb28552c85c2a83b43b6404a8cfb246dd29 /lib_avr32 | |
| parent | f5f652fa91aa69db8117d211af1b4fe09f2edd3b (diff) | |
| download | u-boot-b423f94063bf04e92047ff85c7e53441eb3b712b.zip u-boot-b423f94063bf04e92047ff85c7e53441eb3b712b.tar.gz u-boot-b423f94063bf04e92047ff85c7e53441eb3b712b.tar.bz2 | |
AVR32: Must add NOPs after disabling interrupts for AT32UC3A0512ES
The AT32UC3A0512ES chip has a bug when disabling interrupts. As a
workaround, two NOPs can be inserted.
Signed-off-by: Gunnar Rangoy <gunnar@rangoy.com>
Signed-off-by: Paul Driveklepp <pauldriveklepp@gmail.com>
Signed-off-by: Olav Morken <olavmrk@gmail.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Diffstat (limited to 'lib_avr32')
| -rw-r--r-- | lib_avr32/interrupts.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib_avr32/interrupts.c b/lib_avr32/interrupts.c index 28df20d..bbbc490 100644 --- a/lib_avr32/interrupts.c +++ b/lib_avr32/interrupts.c @@ -35,5 +35,12 @@ int disable_interrupts(void) sr = sysreg_read(SR); asm volatile("ssrf %0" : : "n"(SYSREG_GM_OFFSET)); +#ifdef CONFIG_AT32UC3A0xxx + /* Two NOPs are required after masking interrupts on the + * AT32UC3A0512ES. See errata 41.4.5.5. */ + asm("nop"); + asm("nop"); +#endif + return !SYSREG_BFEXT(GM, sr); } |