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Diffstat (limited to 'docs/porting-guide.rst')
| -rw-r--r-- | docs/porting-guide.rst | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/docs/porting-guide.rst b/docs/porting-guide.rst index ff5bb1225..12e135f71 100644 --- a/docs/porting-guide.rst +++ b/docs/porting-guide.rst @@ -217,11 +217,37 @@ platform port to define additional platform porting constants in - **#define : BL2\_BASE** Defines the base address in secure RAM where BL1 loads the BL2 binary image. - Must be aligned on a page-size boundary. + Must be aligned on a page-size boundary. This constant is not applicable + when BL2_IN_XIP_MEM is set to '1'. - **#define : BL2\_LIMIT** Defines the maximum address in secure RAM that the BL2 image can occupy. + This constant is not applicable when BL2_IN_XIP_MEM is set to '1'. + +- **#define : BL2\_RO\_BASE** + + Defines the base address in secure XIP memory where BL2 RO section originally + lives. Must be aligned on a page-size boundary. This constant is only needed + when BL2_IN_XIP_MEM is set to '1'. + +- **#define : BL2\_RO\_LIMIT** + + Defines the maximum address in secure XIP memory that BL2's actual content + (i.e. excluding any data section allocated at runtime) can occupy. This + constant is only needed when BL2_IN_XIP_MEM is set to '1'. + +- **#define : BL2\_RW\_BASE** + + Defines the base address in secure RAM where BL2's read-write data will live + at runtime. Must be aligned on a page-size boundary. This constant is only + needed when BL2_IN_XIP_MEM is set to '1'. + +- **#define : BL2\_RW\_LIMIT** + + Defines the maximum address in secure RAM that BL2's read-write data can + occupy at runtime. This constant is only needed when BL2_IN_XIP_MEM is set + to '1'. - **#define : BL31\_BASE** |