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Remove mem.PageOrder

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Since the goal is to bootstrap the runtime's slab-like allocator the kernel
should only deal with managing allocations at a single page level.
This commit is contained in:
Achilleas Anagnostopoulos
2017-06-17 07:11:08 +01:00
parent 1d11af21c2
commit c0a9e07e83
7 changed files with 20 additions and 44 deletions
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17
kernel/mem/pmm/allocator/bootmem.go
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@@ -9,13 +9,7 @@ import (
)
var (
// EarlyAllocator points to a static instance of the boot memory allocator
// which is used to bootstrap the kernel before initializing a more
// advanced memory allocator.
EarlyAllocator BootMemAllocator
errBootAllocUnsupportedPageSize = &kernel.Error{Module: "boot_mem_alloc", Message: "allocator only support allocation requests of order(0)"}
errBootAllocOutOfMemory = &kernel.Error{Module: "boot_mem_alloc", Message: "out of memory"}
errBootAllocOutOfMemory = &kernel.Error{Module: "boot_mem_alloc", Message: "out of memory"}
)
// BootMemAllocator implements a rudimentary physical memory allocator which is used
@@ -63,13 +57,8 @@ func (alloc *BootMemAllocator) Init() {
// AllocFrame scans the system memory regions reported by the bootloader and
// reserves the next available free frame.
//
// AllocFrame returns an error if no more memory can be allocated or when the
// requested page order is > 0.
func (alloc *BootMemAllocator) AllocFrame(order mem.PageOrder) (pmm.Frame, *kernel.Error) {
if order > 0 {
return pmm.InvalidFrame, errBootAllocUnsupportedPageSize
}
// AllocFrame returns an error if no more memory can be allocated.
func (alloc *BootMemAllocator) AllocFrame() (pmm.Frame, *kernel.Error) {
var (
foundPageIndex int64 = -1
regionStartPageIndex, regionEndPageIndex int64