Merge tag 'docs-5.15' of git://git.lwn.net/linux

[linux-2.6-microblaze.git] / arch / arm / include / asm / efi.h

diff --git a/arch/arm/include/asm/efi.h b/arch/arm/include/asm/efi.h
index 3ee4f43..a6f3b17 100644 (file)
--- a/arch/arm/include/asm/efi.h
+++ b/arch/arm/include/asm/efi.h
@@ -17,6 +17,7 @@
 
 #ifdef CONFIG_EFI
 void efi_init(void);
+extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);
 
 int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
 int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md);
@@ -52,10 +53,6 @@ void efi_virtmap_unload(void);
 struct screen_info *alloc_screen_info(void);
 void free_screen_info(struct screen_info *si);
 
-static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
-{
-}
-
 /*
  * A reasonable upper bound for the uncompressed kernel size is 32 MBytes,
  * so we will reserve that amount of memory. We have no easy way to tell what
@@ -66,24 +63,17 @@ static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
 #define MAX_UNCOMP_KERNEL_SIZE SZ_32M
 
 /*
- * phys-to-virt patching requires that the physical to virtual offset fits
- * into the immediate field of an add/sub instruction, which comes down to the
- * 24 least significant bits being zero, and so the offset should be a multiple
- * of 16 MB. Since PAGE_OFFSET itself is a multiple of 16 MB, the physical
- * base should be aligned to 16 MB as well.
+ * phys-to-virt patching requires that the physical to virtual offset is a
+ * multiple of 2 MiB. However, using an alignment smaller than TEXT_OFFSET
+ * here throws off the memory allocation logic, so let's use the lowest power
+ * of two greater than 2 MiB and greater than TEXT_OFFSET.
  */
-#define EFI_PHYS_ALIGN         SZ_16M
-
-/* on ARM, the FDT should be located in a lowmem region */
-static inline unsigned long efi_get_max_fdt_addr(unsigned long image_addr)
-{
-       return round_down(image_addr, EFI_PHYS_ALIGN) + SZ_512M;
-}
+#define EFI_PHYS_ALIGN         max(UL(SZ_2M), roundup_pow_of_two(TEXT_OFFSET))
 
 /* on ARM, the initrd should be loaded in a lowmem region */
 static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr)
 {
-       return round_down(image_addr, EFI_PHYS_ALIGN) + SZ_512M;
+       return round_down(image_addr, SZ_4M) + SZ_512M;
 }
 
 struct efi_arm_entry_state {
@@ -93,4 +83,9 @@ struct efi_arm_entry_state {
        u32     sctlr_after_ebs;
 };
 
+static inline void efi_capsule_flush_cache_range(void *addr, int size)
+{
+       __cpuc_flush_dcache_area(addr, size);
+}
+
 #endif /* _ASM_ARM_EFI_H */