diff options
| author | Adrian Huang <[email protected]> | 2015-05-11 09:57:12 +0800 |
|---|---|---|
| committer | Adrian Huang <[email protected]> | 2015-05-11 10:36:11 +0800 |
| commit | 42226779338716fbef7ab4eab6386fe3462912ae (patch) | |
| tree | 4a43b146e02896d1d108f514a926a56d7443a6da /libcpu/arm | |
| parent | 9fa2a04a64b6ae69b8fdcd0a2172262a28e0121d (diff) | |
[libcpu][am335x] Fix the booting failure when enabling MMU
Since the 16 domains are configured as the client domains in
mmu_setttbase(), a Permission fault is generated if the XN bit
(Execute-never) is set in the short-descriptor translation table
(for section and supersection). This leads to the booting failure
when enabling MMU for beagleboard bsp. Here is log:
----------------------------------------------------------------
SD/MMC found on device 0
reading uEnv.txt
117 bytes read in 3 ms (38.1 KiB/s)
Loaded environment from uEnv.txt
Importing environment from mmc ...
Running uenvcmd ...
reading rtthread.bin
162624 bytes read in 24 ms (6.5 MiB/s)
\## Starting application at 0x80200000 ...
----------------------------------------------------------------
This commit removes the XN bit configuration in the section of the
short-descriptor translation table. The OS can be booted successfully
with applying this commit.
Diffstat (limited to 'libcpu/arm')
| -rw-r--r-- | libcpu/arm/am335x/mmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libcpu/arm/am335x/mmu.c b/libcpu/arm/am335x/mmu.c index 46f2d6afd7..d3e505e76a 100644 --- a/libcpu/arm/am335x/mmu.c +++ b/libcpu/arm/am335x/mmu.c @@ -15,7 +15,7 @@ #include <rtthread.h> #include "am33xx.h" -#define DESC_SEC (0x2|(1<<4)) +#define DESC_SEC (0x2) #define CB (3<<2) //cache_on, write_back #define CNB (2<<2) //cache_on, write_through #define NCB (1<<2) //cache_off,WR_BUF on |