diff options
Diffstat (limited to 'Documentation/arm/Booting')
| -rw-r--r-- | Documentation/arm/Booting | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/Documentation/arm/Booting b/Documentation/arm/Booting index 371814a36719..83c1df2fc758 100644 --- a/Documentation/arm/Booting +++ b/Documentation/arm/Booting | |||
| @@ -58,13 +58,18 @@ serial format options as described in | |||
| 58 | -------------------------- | 58 | -------------------------- |
| 59 | 59 | ||
| 60 | Existing boot loaders: OPTIONAL | 60 | Existing boot loaders: OPTIONAL |
| 61 | New boot loaders: MANDATORY | 61 | New boot loaders: MANDATORY except for DT-only platforms |
| 62 | 62 | ||
| 63 | The boot loader should detect the machine type its running on by some | 63 | The boot loader should detect the machine type its running on by some |
| 64 | method. Whether this is a hard coded value or some algorithm that | 64 | method. Whether this is a hard coded value or some algorithm that |
| 65 | looks at the connected hardware is beyond the scope of this document. | 65 | looks at the connected hardware is beyond the scope of this document. |
| 66 | The boot loader must ultimately be able to provide a MACH_TYPE_xxx | 66 | The boot loader must ultimately be able to provide a MACH_TYPE_xxx |
| 67 | value to the kernel. (see linux/arch/arm/tools/mach-types). | 67 | value to the kernel. (see linux/arch/arm/tools/mach-types). This |
| 68 | should be passed to the kernel in register r1. | ||
| 69 | |||
| 70 | For DT-only platforms, the machine type will be determined by device | ||
| 71 | tree. set the machine type to all ones (~0). This is not strictly | ||
| 72 | necessary, but assures that it will not match any existing types. | ||
| 68 | 73 | ||
| 69 | 4. Setup boot data | 74 | 4. Setup boot data |
| 70 | ------------------ | 75 | ------------------ |