diff options
Diffstat (limited to 'Documentation/arm64')
| -rw-r--r-- | Documentation/arm64/booting.txt | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/Documentation/arm64/booting.txt b/Documentation/arm64/booting.txt index a9691cc48fe3..beb754e87c65 100644 --- a/Documentation/arm64/booting.txt +++ b/Documentation/arm64/booting.txt | |||
| @@ -111,8 +111,14 @@ Before jumping into the kernel, the following conditions must be met: | |||
| 111 | - Caches, MMUs | 111 | - Caches, MMUs |
| 112 | The MMU must be off. | 112 | The MMU must be off. |
| 113 | Instruction cache may be on or off. | 113 | Instruction cache may be on or off. |
| 114 | Data cache must be off and invalidated. | 114 | The address range corresponding to the loaded kernel image must be |
| 115 | External caches (if present) must be configured and disabled. | 115 | cleaned to the PoC. In the presence of a system cache or other |
| 116 | coherent masters with caches enabled, this will typically require | ||
| 117 | cache maintenance by VA rather than set/way operations. | ||
| 118 | System caches which respect the architected cache maintenance by VA | ||
| 119 | operations must be configured and may be enabled. | ||
| 120 | System caches which do not respect architected cache maintenance by VA | ||
| 121 | operations (not recommended) must be configured and disabled. | ||
| 116 | 122 | ||
| 117 | - Architected timers | 123 | - Architected timers |
| 118 | CNTFRQ must be programmed with the timer frequency and CNTVOFF must | 124 | CNTFRQ must be programmed with the timer frequency and CNTVOFF must |