lib: xlat_tables_v2: reduce time required to add a mmap region
The last entry in the mapping table is not necessarily the same as the end of the table. This patch loops through the table to find the last entry marker, on every new mmap addition. The memove operation then has to only move the memory between current entry and the last entry. For platforms that arrange their MMIO map properly, this opearation turns out to be a NOP. The previous implementation added significant overhead per mmap addition as the memmove operation always moved the difference between the current mmap entry and the end of the table. Tested on Tegra platforms and this new approach improves the memory mapping time by ~75%, thus significantly reducing boot time on some platforms. Change-Id: Ie3478fa5942379282ef58bee2085da799137e2ca Signed-off-by: Varun Wadekar <vwadekar@nvidia.com> |
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lib/xlat_tables_v2/xlat_tables_internal.c |
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