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| author | Ben Gras <beng@rtems.org> | 2014-12-04 18:21:11 +0100 |
|---|---|---|
| committer | Ben Gras <beng@rtems.org> | 2014-12-05 04:05:45 +0100 |
| commit | 13d902945309c59badf6b5f84b88b72fe41f63a7 (patch) | |
| tree | ac02ed62d7f53aa8f623916c0c3e10f837bf894d /c/src/lib/libcpu | |
| parent | doxygen: expand specified compiler macros to empty string, so they are ignore... (diff) | |
| download | rtems-13d902945309c59badf6b5f84b88b72fe41f63a7.tar.bz2 | |
beagle bsp: disable watchdog on am335x
On recent u-boots, the watchdog is turned on / left enabled. The
Beaglebone Black rev. C ships with such a u-boot internally so any
application booting from it must disable the watchdog.
Therefore this change is needed to boot an RTEMS app out-of-the-box
on a BBB Rev C - otherwise the user button must be held during boot
(to bypass the stock uboot) or the internal uboot must be updated. To
allow for a better out-of-the-box experience, we just turn off the
watchdog.
Diffstat (limited to 'c/src/lib/libcpu')
| -rw-r--r-- | c/src/lib/libcpu/arm/shared/include/am335x.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/c/src/lib/libcpu/arm/shared/include/am335x.h b/c/src/lib/libcpu/arm/shared/include/am335x.h index 4b5ea73379..265cc36784 100644 --- a/c/src/lib/libcpu/arm/shared/include/am335x.h +++ b/c/src/lib/libcpu/arm/shared/include/am335x.h @@ -274,3 +274,9 @@ /* Control posted mode and functional SW reset */ #define AM335X_TIMER_TCAR2 0x058 /* Second captured value of counter register */ +#define AM335X_WDT_BASE 0x44E35000 + /* Watchdog timer */ +#define AM335X_WDT_WWPS 0x34 + /* Command posted status */ +#define AM335X_WDT_WSPR 0x48 + /* Activate/deactivate sequence */ |