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Switch page_manager to use frame_allocator.

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Removed the frame allocation logic from page_manager and replaced it
with using an instance of frame_allocator instead. This had several
major ripple effects:

- memory_initalize() had to change to support this new world
  - Where to map used blocks is now passed as a flag, since blocks don't
    track their virtual address anymore
  - Instead of the complicated "find N contiguous pages that can be
    mapped in with one page table", we now just have the bootloader give
    us some (currently 64) pages to use both for tables and scratch
    space.
  - frame_allocator initialization was split into two steps to allow
    mapping used blocks before std::move()ing them over
This commit is contained in:
Justin C. Miller
2019-02-26 22:56:14 -08:00
parent 626eec4a31
commit 8cdc39fdee
13 changed files with 286 additions and 784 deletions
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26
src/boot/memory.cpp
View File

@@ -4,6 +4,11 @@
#include "memory.h"
#include "utility.h"
const EFI_MEMORY_TYPE memtype_kernel = static_cast<EFI_MEMORY_TYPE>(0x80000000);
const EFI_MEMORY_TYPE memtype_data = static_cast<EFI_MEMORY_TYPE>(0x80000001);
const EFI_MEMORY_TYPE memtype_initrd = static_cast<EFI_MEMORY_TYPE>(0x80000002);
const EFI_MEMORY_TYPE memtype_scratch = static_cast<EFI_MEMORY_TYPE>(0x80000003);
#define INCREMENT_DESC(p, b) (EFI_MEMORY_DESCRIPTOR*)(((uint8_t*)(p))+(b))
size_t fixup_pointer_index = 0;
@@ -32,9 +37,13 @@ static const wchar_t *
memory_type_name(UINT32 value)
{
if (value >= (sizeof(memory_type_names) / sizeof(wchar_t *))) {
if (value == KERNEL_DATA_MEMTYPE) return L"Kernel Data";
else if (value == KERNEL_MEMTYPE) return L"Kernel Image";
else return L"Bad Type Value";
switch (value) {
case memtype_kernel: return L"Kernel Data";
case memtype_data: return L"Kernel Data";
case memtype_initrd: return L"Initial Ramdisk";
case memtype_scratch: return L"Kernel Scratch Space";
default: return L"Bad Type Value";
}
}
return memory_type_names[value];
}
@@ -50,7 +59,7 @@ memory_update_marked_addresses(EFI_EVENT UNUSED *event, void *context)
}
EFI_STATUS
memory_init_pointer_fixup(EFI_BOOT_SERVICES *bootsvc, EFI_RUNTIME_SERVICES *runsvc)
memory_init_pointer_fixup(EFI_BOOT_SERVICES *bootsvc, EFI_RUNTIME_SERVICES *runsvc, unsigned scratch_pages)
{
EFI_STATUS status;
EFI_EVENT event;
@@ -67,7 +76,7 @@ memory_init_pointer_fixup(EFI_BOOT_SERVICES *bootsvc, EFI_RUNTIME_SERVICES *runs
// Reserve a page for our replacement PML4, plus some pages for the kernel to use
// as page tables while it gets started.
EFI_PHYSICAL_ADDRESS addr = 0;
status = bootsvc->AllocatePages(AllocateAnyPages, EfiLoaderData, 16, &addr);
status = bootsvc->AllocatePages(AllocateAnyPages, memtype_scratch, scratch_pages, &addr);
CHECK_EFI_STATUS_OR_RETURN(status, "Failed to allocate page table pages.");
new_pml4 = (uint64_t *)addr;
@@ -187,9 +196,10 @@ memory_virtualize(EFI_RUNTIME_SERVICES *runsvc, struct memory_map *map)
EFI_MEMORY_DESCRIPTOR *d = map->entries;
while (d < end) {
switch (d->Type) {
case KERNEL_MEMTYPE:
case INITRD_MEMTYPE:
case KERNEL_DATA_MEMTYPE:
case memtype_kernel:
case memtype_data:
case memtype_initrd:
case memtype_scratch:
d->Attribute |= EFI_MEMORY_RUNTIME;
d->VirtualStart = d->PhysicalStart + KERNEL_VIRT_ADDRESS;