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https://gitee.com/open-loongarch/linux-5.10.git
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111 lines
2.2 KiB
C
111 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020 Loongson Technology Co., Ltd.
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*/
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#ifndef _ASM_ADDRSPACE_H
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#define _ASM_ADDRSPACE_H
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#include <linux/const.h>
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#include <asm/loongarchregs.h>
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/*
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* This gives the physical RAM offset.
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*/
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#ifndef __ASSEMBLY__
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#ifndef PHYS_OFFSET
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#define PHYS_OFFSET _AC(0, UL)
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#endif
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extern unsigned long vm_map_base;
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#endif /* __ASSEMBLY__ */
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#ifndef IO_BASE
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#define IO_BASE CSR_DMW0_BASE
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#endif
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#ifndef CAC_BASE
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#define CAC_BASE CSR_DMW1_BASE
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#endif
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#ifndef UNCAC_BASE
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#define UNCAC_BASE CSR_DMW0_BASE
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#endif
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#define DMW_PABITS 48
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#define TO_PHYS_MASK ((1ULL << DMW_PABITS) - 1)
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/*
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* Memory above this physical address will be considered highmem.
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*/
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#ifndef HIGHMEM_START
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#define HIGHMEM_START (_AC(1, UL) << _AC(DMW_PABITS, UL))
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#endif
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#define TO_PHYS(x) (((x) & TO_PHYS_MASK))
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#define TO_CAC(x) (CAC_BASE | ((x) & TO_PHYS_MASK))
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#define TO_UNCAC(x) (UNCAC_BASE | ((x) & TO_PHYS_MASK))
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/*
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* This handles the memory map.
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*/
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#ifndef PAGE_OFFSET
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#define PAGE_OFFSET (CAC_BASE + PHYS_OFFSET)
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#endif
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#ifndef FIXADDR_TOP
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#define FIXADDR_TOP ((unsigned long)(long)(int)0xfffe0000)
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#endif
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/*
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* Configure language
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*/
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#ifdef __ASSEMBLY__
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#define _ATYPE_
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#define _ATYPE32_
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#define _ATYPE64_
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#define _CONST64_(x) x
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#else
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#define _ATYPE_ __PTRDIFF_TYPE__
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#define _ATYPE32_ int
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#define _ATYPE64_ __s64
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#ifdef CONFIG_64BIT
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#define _CONST64_(x) x ## L
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#else
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#define _CONST64_(x) x ## LL
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#endif
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#endif
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/*
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* 32/64-bit LoongArch address spaces
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*/
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#ifdef __ASSEMBLY__
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#define _ACAST32_
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#define _ACAST64_
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#else
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#define _ACAST32_ ((_ATYPE_)(_ATYPE32_)) /* widen if necessary */
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#define _ACAST64_ (_ATYPE64_) /* do _not_ narrow */
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#endif
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#ifdef CONFIG_32BIT
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#define UVRANGE 0x00000000
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#define KPRANGE0 0x80000000
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#define KPRANGE1 0xa0000000
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#define KVRANGE 0xc0000000
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#else
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#define XUVRANGE _CONST64_(0x0000000000000000)
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#define XSPRANGE _CONST64_(0x4000000000000000)
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#define XKPRANGE _CONST64_(0x8000000000000000)
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#define XKVRANGE _CONST64_(0xc000000000000000)
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#endif
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/*
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* Returns the physical address of a KPRANGEx / XKPRANGE address
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*/
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#define PHYSADDR(a) ((_ACAST64_(a)) & TO_PHYS_MASK)
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#endif /* _ASM_ADDRSPACE_H */
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