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author | danh-arm <dan.handley@arm.com> | 2016-01-13 12:40:31 +0000 |
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committer | danh-arm <dan.handley@arm.com> | 2016-01-13 12:40:31 +0000 |
commit | 6770d65ff5cb85b5c1a47cf9f7bbf5630234d6da (patch) | |
tree | c16e2be3aaf942247425d68d6db8a33255d88d12 | |
parent | 6cf9b6ac547c21cf045d3089bd9437f0c6aae854 (diff) | |
parent | 359b60d91c0da9e5342fcff17f1dca27258bdb8c (diff) |
Merge pull request #485 from jcastillo-arm/jc/max_mmap_reg
Add 'MAX_MMAP_REGIONS' and 'ADDR_SPACE_SIZE' to the Porting Guide
-rw-r--r-- | docs/porting-guide.md | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/docs/porting-guide.md b/docs/porting-guide.md index 4047d62d..cdb722af 100644 --- a/docs/porting-guide.md +++ b/docs/porting-guide.md @@ -413,6 +413,22 @@ constant must also be defined: used, choose the smallest value needed to map the required virtual addresses for each BL stage. +* **#define : MAX_MMAP_REGIONS** + + Defines the maximum number of regions that are allocated by the translation + table library code. A region consists of physical base address, virtual base + address, size and attributes (Device/Memory, RO/RW, Secure/Non-Secure), as + defined in the `mmap_region_t` structure. The platform defines the regions + that should be mapped. Then, the translation table library will create the + corresponding tables and descriptors at runtime. To minimize the amount of + runtime memory used, choose the smallest value needed to register the + required regions for each BL stage. + +* **#define : ADDR_SPACE_SIZE** + + Defines the total size of the address space in bytes. For example, for a 32 + bit address space, this value should be `(1ull << 32)`. + If the platform port uses the IO storage framework, the following constants must also be defined: |