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Commit 127db024 authored by Andrey Ryabinin's avatar Andrey Ryabinin Committed by Catalin Marinas
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arm64: introduce VA_START macro - the first kernel virtual address. 



In order to not use lengthy (UL(0xffffffffffffffff) << VA_BITS) everywhere,
replace it with VA_START.

Signed-off-by: default avatarAndrey Ryabinin <ryabinin.a.a@gmail.com>
Reviewed-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 40426882

arch/arm64/include/asm/memory.h

+2 −0
Original line number Diff line number Diff line
@@ -42,12 +42,14 @@ 
 * PAGE_OFFSET - the virtual address of the start of the kernel image (top

 *		 (VA_BITS - 1))

 * VA_BITS - the maximum number of bits for virtual addresses.

 * VA_START - the first kernel virtual address.

 * TASK_SIZE - the maximum size of a user space task.

 * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area.

 * The module space lives between the addresses given by TASK_SIZE

 * and PAGE_OFFSET - it must be within 128MB of the kernel text.

 */

#define VA_BITS			(CONFIG_ARM64_VA_BITS)

#define VA_START		(UL(0xffffffffffffffff) << VA_BITS)

#define PAGE_OFFSET		(UL(0xffffffffffffffff) << (VA_BITS - 1))

#define MODULES_END		(PAGE_OFFSET)

#define MODULES_VADDR		(MODULES_END - SZ_64M)

arch/arm64/include/asm/pgtable.h

+1 −1
Original line number Diff line number Diff line
@@ -41,7 +41,7 @@ 
 *	fixed mappings and modules

 */

#define VMEMMAP_SIZE		ALIGN((1UL << (VA_BITS - PAGE_SHIFT)) * sizeof(struct page), PUD_SIZE)

#define VMALLOC_START		(UL(0xffffffffffffffff) << VA_BITS)

#define VMALLOC_START		(VA_START)

#define VMALLOC_END		(PAGE_OFFSET - PUD_SIZE - VMEMMAP_SIZE - SZ_64K)



#define vmemmap			((struct page *)(VMALLOC_END + SZ_64K))