justin/jsix
1
1
Fork 0
mirror of https://github.com/justinian/jsix.git synced 2025-12-09 16:04:32 -08:00
Code Issues Packages Projects Releases Wiki Activity

[kernel] Replace buffer_cache with vm_area_buffers

Browse Source 
In order to reduce the amount of tracked state, now use the
vm_area_buffers instead of a VMA with buffer_cache on top.
This commit is contained in:
Justin C. Miller
2020-09-27 15:34:24 -07:00
parent 67ebc58812
commit f7f8bb3f45
14 changed files with 161 additions and 120 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
src/kernel/vm_space.cpp
View File

@@ -220,6 +220,15 @@ vm_space::clear(const vm_area &vma, uintptr_t offset, size_t count, bool free)
fa.free(free_start, free_count);
}
uintptr_t
vm_space::lookup(const vm_area &vma, uintptr_t offset)
{
uintptr_t base = 0;
if (!find_vma(vma, base))
return 0;
return base + offset;
}
void
vm_space::allow(uintptr_t start, size_t length, bool allow)
{
@@ -276,7 +285,7 @@ vm_space::handle_fault(uintptr_t addr, fault_type fault)
uintptr_t base = 0;
vm_area *area = get(addr, &base);
if ((!area || !area->allowed(page)) && !it.allowed())
if ((!area || !area->allowed(page-base)) && !it.allowed())
return false;
uintptr_t phys = 0;
@@ -294,6 +303,9 @@ vm_space::handle_fault(uintptr_t addr, fault_type fault)
: page_table::flag::user);
if (area) {
if (area->flags() && vm_flags::zero)
kutil::memset(memory::to_virtual<void>(phys), 0, memory::frame_size);
uintptr_t offset = page - base;
area->commit(phys, offset, 1);
return true;