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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*
* Derived from MIPS:
* Copyright (C) 1996, 99 Ralf Baechle
* Copyright (C) 2000, 2002 Maciej W. Rozycki
* Copyright (C) 1990, 1999 by Silicon Graphics, Inc.
*/
#ifndef _ASM_ADDRSPACE_H
#define _ASM_ADDRSPACE_H
#include <linux/const.h>
#include <asm/loongarch.h>
/*
* This gives the physical RAM offset.
*/
#ifndef __ASSEMBLY__
#ifndef PHYS_OFFSET
#define PHYS_OFFSET _AC(0, UL)
#endif
extern unsigned long vm_map_base;
#endif /* __ASSEMBLY__ */
#ifndef IO_BASE
#define IO_BASE CSR_DMW0_BASE
#endif
#ifndef CACHE_BASE
#define CACHE_BASE CSR_DMW1_BASE
#endif
#ifndef UNCACHE_BASE
#define UNCACHE_BASE CSR_DMW0_BASE
#endif
#define DMW_PABITS 48
#define TO_PHYS_MASK ((1ULL << DMW_PABITS) - 1)
/*
* Memory above this physical address will be considered highmem.
*/
#ifndef HIGHMEM_START
#define HIGHMEM_START (_AC(1, UL) << _AC(DMW_PABITS, UL))
#endif
#define TO_PHYS(x) ( ((x) & TO_PHYS_MASK))
#define TO_CACHE(x) (CACHE_BASE | ((x) & TO_PHYS_MASK))
#define TO_UNCACHE(x) (UNCACHE_BASE | ((x) & TO_PHYS_MASK))
/*
* This handles the memory map.
*/
#ifndef PAGE_OFFSET
#define PAGE_OFFSET (CACHE_BASE + PHYS_OFFSET)
#endif
#ifndef FIXADDR_TOP
#define FIXADDR_TOP ((unsigned long)(long)(int)0xfffe0000)
#endif
#ifdef __ASSEMBLY__
#define _ATYPE_
#define _ATYPE32_
#define _ATYPE64_
#define _CONST64_(x) x
#else
#define _ATYPE_ __PTRDIFF_TYPE__
#define _ATYPE32_ int
#define _ATYPE64_ __s64
#ifdef CONFIG_64BIT
#define _CONST64_(x) x ## L
#else
#define _CONST64_(x) x ## LL
#endif
#endif
/*
* 32/64-bit LoongArch address spaces
*/
#ifdef __ASSEMBLY__
#define _ACAST32_
#define _ACAST64_
#else
#define _ACAST32_ (_ATYPE_)(_ATYPE32_) /* widen if necessary */
#define _ACAST64_ (_ATYPE64_) /* do _not_ narrow */
#endif
#ifdef CONFIG_32BIT
#define UVRANGE 0x00000000
#define KPRANGE0 0x80000000
#define KPRANGE1 0xa0000000
#define KVRANGE 0xc0000000
#else
#define XUVRANGE _CONST64_(0x0000000000000000)
#define XSPRANGE _CONST64_(0x4000000000000000)
#define XKPRANGE _CONST64_(0x8000000000000000)
#define XKVRANGE _CONST64_(0xc000000000000000)
#endif
/*
* Returns the physical address of a KPRANGEx / XKPRANGE address
*/
#define PHYSADDR(a) ((_ACAST64_(a)) & TO_PHYS_MASK)
/*
* On LoongArch, I/O ports mappring is following:
*
* | .... |
* |-----------------------|
* | pci io ports(16K~32M) |
* |-----------------------|
* | isa io ports(0 ~16K) |
* PCI_IOBASE ->|-----------------------|
* | .... |
*/
#define PCI_IOBASE ((void __iomem *)(vm_map_base + (2 * PAGE_SIZE)))
#define PCI_IOSIZE SZ_32M
#define ISA_IOSIZE SZ_16K
#define IO_SPACE_LIMIT (PCI_IOSIZE - 1)
#endif /* _ASM_ADDRSPACE_H */
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