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Truly enable virtual memory.

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Map is still identity-mapped. I think we need to sort and/or clean up
the map before using a higher half address. In-kernel vga output not
working yet, but do_the_set_registers() is getting called.
This commit is contained in:
Justin C. Miller
2018-03-25 13:51:32 -07:00
parent 417f080993
commit 64a6d88e5c
5 changed files with 52 additions and 35 deletions
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47
src/boot/memory.c
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@@ -26,13 +26,19 @@ const CHAR16 *memory_type_names[] = {
};
static const CHAR16 *memory_type_name(UINT32 value) {
if (value >= (sizeof(memory_type_names)/sizeof(CHAR16*)))
if (value >= (sizeof(memory_type_names)/sizeof(CHAR16*))) {
if (value == KERNEL_MEMTYPE)
return L"Kernel Image";
return L"Bad Type Value";
}
return memory_type_names[value];
}
void EFIAPI memory_update_addresses(EFI_EVENT UNUSED *event, void *context) {
ST->RuntimeServices->ConvertPointer(0, (void **)context);
EFI_STATUS status;
status = ST->RuntimeServices->ConvertPointer(0, (void **)context);
CHECK_EFI_STATUS_OR_ASSERT(status, *((void**)context));
}
EFI_STATUS memory_mark_address_for_update(void **pointer) {
@@ -46,17 +52,29 @@ EFI_STATUS memory_mark_address_for_update(void **pointer) {
(void*)pointer,
&event);
CHECK_EFI_STATUS_OR_RETURN(status, "Failed to create memory update event");
CHECK_EFI_STATUS_OR_ASSERT(status, pointer);
}
EFI_STATUS memory_virtualize(void **kernel_addr, EFI_MEMORY_DESCRIPTOR *memory_map,
UINTN memmap_size, UINTN desc_size, UINT32 desc_version) {
unsigned count = memmap_size / desc_size;
for (unsigned i=0; i<count; ++i) {
if (memory_map[i].Type == KERNEL_MEMTYPE)
memory_map[i].VirtualStart = (EFI_VIRTUAL_ADDRESS)KERNEL_VIRT_ADDRESS;
else
memory_map[i].VirtualStart = (EFI_VIRTUAL_ADDRESS)memory_map[i].PhysicalStart;
EFI_STATUS
memory_virtualize(
EFI_MEMORY_DESCRIPTOR *memory_map,
UINTN memmap_size,
UINTN desc_size,
UINT32 desc_version) {
EFI_MEMORY_DESCRIPTOR *end = (EFI_MEMORY_DESCRIPTOR *)((uint8_t *)memory_map + memmap_size);
EFI_MEMORY_DESCRIPTOR *d = memory_map;
while (d < end) {
if (d->Type == KERNEL_MEMTYPE) {
//d->VirtualStart = (EFI_VIRTUAL_ADDRESS)KERNEL_VIRT_ADDRESS;
d->VirtualStart = (EFI_VIRTUAL_ADDRESS)d->PhysicalStart;
d->Attribute |= EFI_MEMORY_RUNTIME;
}
else /*if (d->Attribute & EFI_MEMORY_RUNTIME)*/ {
d->VirtualStart = (EFI_VIRTUAL_ADDRESS)d->PhysicalStart;
}
d = (EFI_MEMORY_DESCRIPTOR *)((uint8_t *)d + desc_size);
}
return ST->RuntimeServices->SetVirtualAddressMap(memmap_size, desc_size, desc_version, memory_map);
@@ -101,10 +119,9 @@ EFI_STATUS memory_dump_map() {
EFI_MEMORY_DESCRIPTOR *end = (EFI_MEMORY_DESCRIPTOR *)((uint8_t *)buffer + buffer_size);
EFI_MEMORY_DESCRIPTOR *d = buffer;
while (d < end) {
UINTN size_bytes = d->NumberOfPages * PAGE_SIZE;
Print(L"%23s ", memory_type_name(d->Type));
Print(L"%016llx (%3d pages)\n", d->PhysicalStart, size_bytes / 0x1000);
int runtime = (d->Attribute & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME;
Print(L"%23s%s ", memory_type_name(d->Type), runtime ? L"*" : L" ");
Print(L"%016llx (%3d pages)\n", d->PhysicalStart, d->NumberOfPages);
d = (EFI_MEMORY_DESCRIPTOR *)((uint8_t *)d + desc_size);
}