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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 _UL(0) #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 (_UL(1) << _UL(DMW_PABITS)) #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_ #else #define _ATYPE_ __PTRDIFF_TYPE__ #define _ATYPE32_ int #define _ATYPE64_ __s64 #endif #ifdef CONFIG_64BIT #define _CONST64_(x) _UL(x) #else #define _CONST64_(x) _ULL(x) #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) #define PHYS_LINK_KADDR PHYSADDR(VMLINUX_LOAD_ADDRESS) #endif /* _ASM_ADDRSPACE_H */