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Splitting out UEFI bootloader code from kernel

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Now the bootloader should be responsible for all initial setup,
loading the kernel, and then handing off to the kernel with
proper data in place.
This commit is contained in:
Justin C. Miller
2017-07-26 01:41:46 -07:00
parent 9ae583b1ec
commit d02e1d97d9
14 changed files with 242 additions and 53 deletions
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76
src/boot/main.c Normal file
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#include <efi.h>
#include <efilib.h>
#include "console.h"
#include "loader.h"
#include "memory.h"
#include "utility.h"
#ifndef GIT_VERSION
#define GIT_VERSION L"no version"
#endif
EFI_STATUS
efi_main (EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable)
{
EFI_STATUS status;
InitializeLib(ImageHandle, SystemTable);
// When checking the console initialization error,
// use CHECK_EFI_STATUS_OR_RETURN because we can't
// be sure if the console was fully set up
status = con_initialize(GIT_VERSION);
CHECK_EFI_STATUS_OR_RETURN(status, "con_initialize");
// From here on out, use CHECK_EFI_STATUS_OR_FAIL instead
// because the console is now set up
// Get info about the image
con_status_begin(L"Gathering image information...");
EFI_LOADED_IMAGE *info = 0;
EFI_GUID image_proto = EFI_LOADED_IMAGE_PROTOCOL_GUID;
status = ST->BootServices->HandleProtocol(ImageHandle, &image_proto, (void **)&info);
CHECK_EFI_STATUS_OR_FAIL(status);
con_status_ok();
con_status_begin(L"Virtualizing memory...");
status = memory_virtualize();
CHECK_EFI_STATUS_OR_FAIL(status);
con_status_ok();
con_status_begin(L"Loading kernel into memory...");
void *kernel_image = NULL;
UINT64 len = 0;
status = loader_load_kernel(&kernel_image, &len);
CHECK_EFI_STATUS_OR_FAIL(status);
Print(L" %u bytes at 0x%x", len, kernel_image);
con_status_ok();
/*
dump_memory_map();
UINTN memmap_size = 0;
EFI_MEMORY_DESCRIPTOR *memmap;
UINTN memmap_key;
UINTN desc_size;
UINT32 desc_version;
con_status_begin(L"Exiting boot services");
memmap = LibMemoryMap(&memmap_size, &memmap_key,
&desc_size, &desc_version);
status = ST->BootServices->ExitBootServices(ImageHandle, memmap_key);
CHECK_EFI_STATUS_OR_FAIL(status);
con_status_ok();
con_status_begin(L"Setting virtual address map");
status = ST->RuntimeServices->SetVirtualAddressMap(
memmap_size, desc_size, desc_version, memmap);
CHECK_EFI_STATUS_OR_FAIL(status);
con_status_ok();
*/
while (1) __asm__("hlt");
return status;
}