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arm64: Direct access to Mckernel memory from Linux.

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Change-Id: I1a096aa5232c56382ae19d8c4e4f41d4e3e9f660
This commit is contained in:
Shiratori, Takehiro
2019-02-26 17:17:46 +09:00
committed by Dominique Martinet
parent 20d5900c35
commit aa3c5e91db
9 changed files with 32 additions and 28 deletions
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21
arch/arm64/kernel/include/arch-memory.h
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@ -34,7 +34,7 @@ void panic(const char *);
*/
/* early alloc area address */
/* START:_end, SIZE:512 pages */
#define MAP_EARLY_ALLOC_SHIFT 9
#define MAP_EARLY_ALLOC_SHIFT 5
#define MAP_EARLY_ALLOC_SIZE (UL(1) << (PAGE_SHIFT + MAP_EARLY_ALLOC_SHIFT))
#ifndef __ASSEMBLY__
@ -55,7 +55,10 @@ extern char _end[];
# define MAP_BOOT_PARAM_END (MAP_BOOT_PARAM + MAP_BOOT_PARAM_SIZE)
#endif /* !__ASSEMBLY__ */
#if (VA_BITS == 39 && GRANULE_SIZE == _SZ4KB)
/*
* MAP_KERNEL_START is HOST MODULES_END - 8MiB
*/
#if (VA_BITS == 39 && GRANULE_SIZE == _SZ4KB) /* ARM64_MEMORY_LAYOUT=1 */
#
# define LD_TASK_UNMAPPED_BASE UL(0x0000000400000000)
# define TASK_UNMAPPED_BASE UL(0x0000000800000000)
@ -64,9 +67,9 @@ extern char _end[];
# define MAP_VMAP_SIZE UL(0x0000000100000000)
# define MAP_FIXED_START UL(0xffffffbffbdfd000)
# define MAP_ST_START UL(0xffffffc000000000)
# define MAP_KERNEL_START UL(0xffffffffff800000)
# define MAP_KERNEL_START UL(0xffffff8007800000)
#
#elif (VA_BITS == 42 && GRANULE_SIZE == _SZ64KB)
#elif (VA_BITS == 42 && GRANULE_SIZE == _SZ64KB) /* ARM64_MEMORY_LAYOUT=3 */
#
# define LD_TASK_UNMAPPED_BASE UL(0x0000002000000000)
# define TASK_UNMAPPED_BASE UL(0x0000004000000000)
@ -75,9 +78,9 @@ extern char _end[];
# define MAP_VMAP_SIZE UL(0x0000000100000000)
# define MAP_FIXED_START UL(0xfffffdfffbdd0000)
# define MAP_ST_START UL(0xfffffe0000000000)
# define MAP_KERNEL_START UL(0xffffffffe0000000)
# define MAP_KERNEL_START UL(0xfffffc0007800000)
#
#elif (VA_BITS == 48 && GRANULE_SIZE == _SZ4KB)
#elif (VA_BITS == 48 && GRANULE_SIZE == _SZ4KB) /* ARM64_MEMORY_LAYOUT=2 */
#
# define LD_TASK_UNMAPPED_BASE UL(0x0000080000000000)
# define TASK_UNMAPPED_BASE UL(0x0000100000000000)
@ -86,9 +89,9 @@ extern char _end[];
# define MAP_VMAP_SIZE UL(0x0000000100000000)
# define MAP_FIXED_START UL(0xffff7ffffbdfd000)
# define MAP_ST_START UL(0xffff800000000000)
# define MAP_KERNEL_START UL(0xffffffffff800000)
# define MAP_KERNEL_START UL(0xffff000007800000)
#
#elif (VA_BITS == 48 && GRANULE_SIZE == _SZ64KB)
#elif (VA_BITS == 48 && GRANULE_SIZE == _SZ64KB) /* ARM64_MEMORY_LAYOUT=4 */
#
# define LD_TASK_UNMAPPED_BASE UL(0x0000080000000000)
# define TASK_UNMAPPED_BASE UL(0x0000100000000000)
@ -97,7 +100,7 @@ extern char _end[];
# define MAP_VMAP_SIZE UL(0x0000000100000000)
# define MAP_FIXED_START UL(0xffff7ffffbdd0000)
# define MAP_ST_START UL(0xffff800000000000)
# define MAP_KERNEL_START UL(0xffffffffe0000000)
# define MAP_KERNEL_START UL(0xffff000007800000)
#
#else
# error address space is not defined.