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Compute as much as possible as compile-time

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This commit is contained in:
Baptiste Wicht 2014-02-05 20:11:19 +01:00
parent ac0c3338e6
commit 896b54c714
1 changed files with 5 additions and 11 deletions
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16
kernel/src/virtual_allocator.cpp
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@ -10,22 +10,16 @@
namespace {
size_t next_virtual_address = 0;
size_t allocated_pages = 0;
constexpr const size_t virtual_start = paging::virtual_paging_start + (paging::physical_memory_pages * paging::PAGE_SIZE);
constexpr const size_t first_virtual_address = virtual_start % 0x100000 == 0 ? virtual_start : (virtual_start / 0x100000 + 1) * 0x100000;
size_t next_virtual_address = first_virtual_address;
size_t allocated_pages = first_virtual_address / paging::PAGE_SIZE;
} //end of anonymous namespace
void virtual_allocator::init(){
auto start = paging::virtual_paging_start;
start += paging::physical_memory_pages * paging::PAGE_SIZE;
if(start % 0x100000 == 0){
next_virtual_address = start;
} else {
next_virtual_address = (start / 0x100000 + 1) * 0x100000;
}
allocated_pages = next_virtual_address / paging::PAGE_SIZE;
}
size_t virtual_allocator::allocate(size_t pages){