[linux-2.6-block.git] / arch / powerpc / include / asm / book3s / 64 / radix-64k.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_PGTABLE_RADIX_64K_H
#define _ASM_POWERPC_PGTABLE_RADIX_64K_H

/*
 * For 64K page size supported index is 13/9/9/5
 */
#define RADIX_PTE_INDEX_SIZE   5  // size: 8B <<  5 = 256B, maps 2^5  x   64K =   2MB
#define RADIX_PMD_INDEX_SIZE   9  // size: 8B <<  9 =  4KB, maps 2^9  x   2MB =   1GB
#define RADIX_PUD_INDEX_SIZE   9  // size: 8B <<  9 =  4KB, maps 2^9  x   1GB = 512GB
#define RADIX_PGD_INDEX_SIZE  13  // size: 8B << 13 = 64KB, maps 2^13 x 512GB =   4PB

/*
 * We use a 256 byte PTE page fragment in radix
 * 8 bytes per each PTE entry.
 */
#define RADIX_PTE_FRAG_SIZE_SHIFT  (RADIX_PTE_INDEX_SIZE + 3)
#define RADIX_PTE_FRAG_NR	(PAGE_SIZE >> RADIX_PTE_FRAG_SIZE_SHIFT)

#define RADIX_PMD_FRAG_SIZE_SHIFT  (RADIX_PMD_INDEX_SIZE + 3)
#define RADIX_PMD_FRAG_NR	(PAGE_SIZE >> RADIX_PMD_FRAG_SIZE_SHIFT)

#endif /* _ASM_POWERPC_PGTABLE_RADIX_64K_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
b0b5e9b1 AK	2	#ifndef _ASM_POWERPC_PGTABLE_RADIX_64K_H
	3	#define _ASM_POWERPC_PGTABLE_RADIX_64K_H
	4
	5	/*
	6	* For 64K page size supported index is 13/9/9/5
	7	*/
eea86aa4 ME	8	#define RADIX_PTE_INDEX_SIZE 5 // size: 8B << 5 = 256B, maps 2^5 x 64K = 2MB
	9	#define RADIX_PMD_INDEX_SIZE 9 // size: 8B << 9 = 4KB, maps 2^9 x 2MB = 1GB
	10	#define RADIX_PUD_INDEX_SIZE 9 // size: 8B << 9 = 4KB, maps 2^9 x 1GB = 512GB
	11	#define RADIX_PGD_INDEX_SIZE 13 // size: 8B << 13 = 64KB, maps 2^13 x 512GB = 4PB
b0b5e9b1	12
fb4e5dbd AK	13	/*
	14	* We use a 256 byte PTE page fragment in radix
	15	* 8 bytes per each PTE entry.
	16	*/
	17	#define RADIX_PTE_FRAG_SIZE_SHIFT (RADIX_PTE_INDEX_SIZE + 3)
	18	#define RADIX_PTE_FRAG_NR (PAGE_SIZE >> RADIX_PTE_FRAG_SIZE_SHIFT)
8a6c697b AK	19
	20	#define RADIX_PMD_FRAG_SIZE_SHIFT (RADIX_PMD_INDEX_SIZE + 3)
	21	#define RADIX_PMD_FRAG_NR (PAGE_SIZE >> RADIX_PMD_FRAG_SIZE_SHIFT)
	22
b0b5e9b1	23	#endif /* _ASM_POWERPC_PGTABLE_RADIX_64K_H */