linux/arch/csky/include/asm/addrspace.h

/* SPDX-License-Identifier: GPL-2.0 */
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.

#ifndef __ASM_CSKY_ADDRSPACE_H
#define __ASM_CSKY_ADDRSPACE_H

#define KSEG0		0x80000000ul
#define KSEG0ADDR(a)	(((unsigned long)a & 0x1fffffff) | KSEG0)

#endif /* __ASM_CSKY_ADDRSPACE_H */
csky: MMU and page table management This patch adds files related to memory management and here is our memory-layout: Fixmap : 0xffc02000 – 0xfffff000 (4 MB - 12KB) Pkmap : 0xff800000 – 0xffc00000 (4 MB) Vmalloc : 0xf0200000 – 0xff000000 (238 MB) Lowmem : 0x80000000 – 0xc0000000 (1GB) abiv1 CPU (CK610) is VIPT cache and it doesn't support highmem. abiv2 CPUs are all PIPT cache and they could support highmem. Lowmem is directly mapped by msa0 & msa1 reg, and we needn't setup memory page table for it. Link:https://lore.kernel.org/lkml/20180518215548.GH17671@n2100.armlinux.org.uk/ Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Christoph Hellwig <hch@infradead.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> 2018-09-05 14:25:12 +08:00			`/* SPDX-License-Identifier: GPL-2.0 */`
			`// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.`

			`#ifndef __ASM_CSKY_ADDRSPACE_H`
			`#define __ASM_CSKY_ADDRSPACE_H`

			`#define KSEG0 0x80000000ul`
			`#define KSEG0ADDR(a) (((unsigned long)a & 0x1fffffff) \| KSEG0)`

			`#endif /* __ASM_CSKY_ADDRSPACE_H */`