Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 07a7056c authored by Russell King's avatar Russell King
Browse files

ARM: provide arm_has_idmap_alias() helper 



Provide a helper to indicate whether we need to perform special handling
for boot identity mapping aliases or not.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: default avatarPratyush Anand <panand@redhat.com>
parent d0506a23

arch/arm/include/asm/memory.h

+5 −0
Original line number Diff line number Diff line
@@ -295,6 +295,11 @@ extern long long arch_phys_to_idmap_offset; 
 * of physical memory for idmap purposes.  Most cases should leave these

 * untouched.  Note: this can only return addresses less than 4GiB.

 */

static inline bool arm_has_idmap_alias(void)

{

	return IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset != 0;

}



#define IDMAP_INVALID_ADDR ((u32)~0)



static inline unsigned long phys_to_idmap(phys_addr_t addr)