diff options
| author | Wayne <[email protected]> | 2023-03-31 10:06:28 +0800 |
|---|---|---|
| committer | GitHub <[email protected]> | 2023-03-31 10:06:28 +0800 |
| commit | 3309ef60011f2ddaf8ab32f5c0243c054188f152 (patch) | |
| tree | 5ba944b309c96d9b37699a8e3d23de390f0b92f8 /libcpu | |
| parent | 3c2169e6379ccc522e6192b6589f0e0d1d922e44 (diff) | |
[libcpu/arm/cortex-a] Revert safety MMU initialization. (#6796)
* Revert safety MMU initialization.
Co-authored-by: Wayne Lin <[email protected]>
Diffstat (limited to 'libcpu')
| -rw-r--r-- | libcpu/arm/cortex-a/start_gcc.S | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/libcpu/arm/cortex-a/start_gcc.S b/libcpu/arm/cortex-a/start_gcc.S index b1cddebe0b..658ff5a649 100644 --- a/libcpu/arm/cortex-a/start_gcc.S +++ b/libcpu/arm/cortex-a/start_gcc.S @@ -147,7 +147,14 @@ after_enable_mmu: /* disable the data alignment check */ mrc p15, 0, r1, c1, c0, 0 - bic r1, #(1<<1) + bic r1, #(1<<1) /* Disable Alignment fault checking */ +#ifndef RT_USING_SMART + bic r1, #(1<<0) /* Disable MMU */ + bic r1, #(1<<2) /* Disable data cache */ + bic r1, #(1<<11) /* Disable program flow prediction */ + bic r1, #(1<<12) /* Disable instruction cache */ + bic r1, #(3<<19) /* bit[20:19] must be zero */ +#endif /* RT_USING_SMART */ mcr p15, 0, r1, c1, c0, 0 /* enable I cache + branch prediction */ |