#include <common.h>
#include <div64.h>
#include <efi_loader.h>
-#include <environment.h>
#include <malloc.h>
#include <linux/libfdt_env.h>
#include <u-boot/crc.h>
/* Handle of the currently executing image */
static efi_handle_t current_image;
-/*
- * If we're running on nasty systems (32bit ARM booting into non-EFI Linux)
- * we need to do trickery with caches. Since we don't want to break the EFI
- * aware boot path, only apply hacks when loading exiting directly (breaking
- * direct Linux EFI booting along the way - oh well).
- */
-static bool efi_is_direct_boot = true;
-
#ifdef CONFIG_ARM
/*
* The "gd" pointer lives in a register on ARM and AArch64 that we declare
*/
static void efi_exit_caches(void)
{
-#if defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
+#if defined(CONFIG_EFI_GRUB_ARM32_WORKAROUND)
/*
- * Grub on 32bit ARM needs to have caches disabled before jumping into
- * a zImage, but does not know of all cache layers. Give it a hand.
+ * Boooting Linux via GRUB prior to version 2.04 fails on 32bit ARM if
+ * caches are enabled.
+ *
+ * TODO:
+ * According to the UEFI spec caches that can be managed via CP15
+ * operations should be enabled. Caches requiring platform information
+ * to manage should be disabled. This should not happen in
+ * ExitBootServices() but before invoking any UEFI binary is invoked.
+ *
+ * We want to keep the current workaround while GRUB prior to version
+ * 2.04 is still in use.
*/
- if (efi_is_direct_boot)
- cleanup_before_linux();
+ cleanup_before_linux();
#endif
}
if (ret != EFI_SUCCESS)
return EFI_EXIT(EFI_INVALID_PARAMETER);
- efi_is_direct_boot = false;
-
image_obj->exit_data_size = exit_data_size;
image_obj->exit_data = exit_data;