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mmu_map_physical_memory() now accepts physical memory addresses that are not aligned to a page.

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8014 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2004-06-17 00:56:45 +00:00
parent 1273cbedfc
commit 842a265376
1 changed files with 4 additions and 1 deletions
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5
src/kernel/boot/platform/bios_ia32/mmu.cpp
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@ -238,12 +238,15 @@ extern "C" addr_t
mmu_map_physical_memory(addr_t physicalAddress, size_t size, uint32 flags) mmu_map_physical_memory(addr_t physicalAddress, size_t size, uint32 flags)
{ {
addr_t address = sNextVirtualAddress; addr_t address = sNextVirtualAddress;
addr_t pageOffset = physicalAddress & (B_PAGE_SIZE - 1);
physicalAddress -= pageOffset;
for (addr_t offset = 0; offset < size; offset += B_PAGE_SIZE) { for (addr_t offset = 0; offset < size; offset += B_PAGE_SIZE) {
map_page(get_next_virtual_page(), physicalAddress + offset, flags); map_page(get_next_virtual_page(), physicalAddress + offset, flags);
} }
return address; return address + pageOffset;
} }