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/*
* Copyright (C) 2013 David Decotigny <decot@googlers.com>
*
* See drv0.c for an example session.
*/
#include <efi.h>
#include <efilib.h>
#include "drv0.h"
static EFI_GUID GnuEfiAppsDrv0ProtocolGuid
= GNU_EFI_APPS_DRV0_PROTOCOL_GUID;
static
EFI_STATUS
PlayWithGnuEfiAppsDrv0Protocol(IN EFI_HANDLE DrvHandle) {
EFI_STATUS Status;
GNU_EFI_APPS_DRV0_PROTOCOL *drv = NULL;
UINTN NumberOfHello = 0;
Status = uefi_call_wrapper(BS->OpenProtocol, 6,
DrvHandle,
&GnuEfiAppsDrv0ProtocolGuid,
&drv,
DrvHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (EFI_ERROR(Status)) {
Print(L"Cannot open proto: %d\n", Status);
return Status;
}
Status = uefi_call_wrapper(drv->SayHello, 2, drv, L"Sample UEFI Driver");
if (EFI_ERROR(Status)) {
Print(L"Cannot call SayHello: %d\n", Status);
}
Status = uefi_call_wrapper(drv->GetNumberOfHello, 2, drv, &NumberOfHello);
if (EFI_ERROR(Status)) {
Print(L"Cannot call GetNumberOfHello: %d\n", Status);
} else {
Print(L"Hello was called %d time(s).\n", NumberOfHello);
}
return EFI_SUCCESS;
}
EFI_STATUS
efi_main (EFI_HANDLE Image, EFI_SYSTEM_TABLE *SysTab)
{
EFI_STATUS Status;
EFI_HANDLE *Handles = NULL;
UINTN i, NoHandles = 0;
InitializeLib(Image, SysTab);
Status = LibLocateHandle(ByProtocol, &GnuEfiAppsDrv0ProtocolGuid,
NULL, &NoHandles, &Handles);
if (EFI_ERROR(Status)) {
Print(L"Error looking up handles for proto: %d\n", Status);
return Status;
}
for (i = 0 ; i < NoHandles ; ++i)
{
Print(L"Playing with driver instance %d...\n", i);
Status = PlayWithGnuEfiAppsDrv0Protocol(Handles[i]);
if (EFI_ERROR(Status))
Print(L"Error playing with instance %d, skipping\n", i);
}
if (Handles)
FreePool(Handles);
return EFI_SUCCESS;
}
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