253 lines
9.1 KiB
C
253 lines
9.1 KiB
C
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/*
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* include/asm-xtensa/fixmap.h
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2001 - 2005 Tensilica Inc.
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*/
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#ifndef _XTENSA_FIXMAP_H
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#define _XTENSA_FIXMAP_H
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#include <asm/processor.h>
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#ifdef CONFIG_MMU
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/*
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* Here we define all the compile-time virtual addresses.
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*/
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#if XCHAL_SEG_MAPPABLE_VADDR != 0
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# error "Current port requires virtual user space starting at 0"
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#endif
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#if XCHAL_SEG_MAPPABLE_SIZE < 0x80000000
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# error "Current port requires at least 0x8000000 bytes for user space"
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#endif
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/* Verify instruction/data ram/rom and xlmi don't overlay vmalloc space. */
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#define __IN_VMALLOC(addr) \
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(((addr) >= VMALLOC_START) && ((addr) < VMALLOC_END))
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#define __SPAN_VMALLOC(start,end) \
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(((start) < VMALLOC_START) && ((end) >= VMALLOC_END))
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#define INSIDE_VMALLOC(start,end) \
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(__IN_VMALLOC((start)) || __IN_VMALLOC(end) || __SPAN_VMALLOC((start),(end)))
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#if XCHAL_NUM_INSTROM
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# if XCHAL_NUM_INSTROM == 1
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# if INSIDE_VMALLOC(XCHAL_INSTROM0_VADDR,XCHAL_INSTROM0_VADDR+XCHAL_INSTROM0_SIZE)
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# error vmalloc range conflicts with instrom0
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# endif
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# endif
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# if XCHAL_NUM_INSTROM == 2
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# if INSIDE_VMALLOC(XCHAL_INSTROM1_VADDR,XCHAL_INSTROM1_VADDR+XCHAL_INSTROM1_SIZE)
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# error vmalloc range conflicts with instrom1
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# endif
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# endif
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#endif
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#if XCHAL_NUM_INSTRAM
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# if XCHAL_NUM_INSTRAM == 1
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# if INSIDE_VMALLOC(XCHAL_INSTRAM0_VADDR,XCHAL_INSTRAM0_VADDR+XCHAL_INSTRAM0_SIZE)
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# error vmalloc range conflicts with instram0
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# endif
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# endif
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# if XCHAL_NUM_INSTRAM == 2
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# if INSIDE_VMALLOC(XCHAL_INSTRAM1_VADDR,XCHAL_INSTRAM1_VADDR+XCHAL_INSTRAM1_SIZE)
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# error vmalloc range conflicts with instram1
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# endif
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# endif
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#endif
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#if XCHAL_NUM_DATAROM
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# if XCHAL_NUM_DATAROM == 1
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# if INSIDE_VMALLOC(XCHAL_DATAROM0_VADDR,XCHAL_DATAROM0_VADDR+XCHAL_DATAROM0_SIZE)
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# error vmalloc range conflicts with datarom0
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# endif
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# endif
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# if XCHAL_NUM_DATAROM == 2
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# if INSIDE_VMALLOC(XCHAL_DATAROM1_VADDR,XCHAL_DATAROM1_VADDR+XCHAL_DATAROM1_SIZE)
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# error vmalloc range conflicts with datarom1
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# endif
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# endif
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#endif
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#if XCHAL_NUM_DATARAM
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# if XCHAL_NUM_DATARAM == 1
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# if INSIDE_VMALLOC(XCHAL_DATARAM0_VADDR,XCHAL_DATARAM0_VADDR+XCHAL_DATARAM0_SIZE)
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# error vmalloc range conflicts with dataram0
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# endif
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# endif
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# if XCHAL_NUM_DATARAM == 2
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# if INSIDE_VMALLOC(XCHAL_DATARAM1_VADDR,XCHAL_DATARAM1_VADDR+XCHAL_DATARAM1_SIZE)
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# error vmalloc range conflicts with dataram1
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# endif
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# endif
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#endif
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#if XCHAL_NUM_XLMI
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# if XCHAL_NUM_XLMI == 1
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# if INSIDE_VMALLOC(XCHAL_XLMI0_VADDR,XCHAL_XLMI0_VADDR+XCHAL_XLMI0_SIZE)
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# error vmalloc range conflicts with xlmi0
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# endif
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# endif
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# if XCHAL_NUM_XLMI == 2
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# if INSIDE_VMALLOC(XCHAL_XLMI1_VADDR,XCHAL_XLMI1_VADDR+XCHAL_XLMI1_SIZE)
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# error vmalloc range conflicts with xlmi1
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# endif
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# endif
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#endif
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#if (XCHAL_NUM_INSTROM > 2) || \
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(XCHAL_NUM_INSTRAM > 2) || \
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(XCHAL_NUM_DATARAM > 2) || \
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(XCHAL_NUM_DATAROM > 2) || \
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(XCHAL_NUM_XLMI > 2)
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# error Insufficient checks on vmalloc above for more than 2 devices
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#endif
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/*
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* USER_VM_SIZE does not necessarily equal TASK_SIZE. We bumped
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* TASK_SIZE down to 0x4000000 to simplify the handling of windowed
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* call instructions (currently limited to a range of 1 GByte). User
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* tasks may very well reclaim the VM space from 0x40000000 to
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* 0x7fffffff in the future, so we do not want the kernel becoming
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* accustomed to having any of its stuff (e.g., page tables) in this
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* region. This VM region is no-man's land for now.
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*/
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#define USER_VM_START XCHAL_SEG_MAPPABLE_VADDR
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#define USER_VM_SIZE 0x80000000
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/* Size of page table: */
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#define PGTABLE_SIZE_BITS (32 - XCHAL_MMU_MIN_PTE_PAGE_SIZE + 2)
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#define PGTABLE_SIZE (1L << PGTABLE_SIZE_BITS)
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/* All kernel-mappable space: */
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#define KERNEL_ALLMAP_START (USER_VM_START + USER_VM_SIZE)
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#define KERNEL_ALLMAP_SIZE (XCHAL_SEG_MAPPABLE_SIZE - KERNEL_ALLMAP_START)
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/* Carve out page table at start of kernel-mappable area: */
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#if KERNEL_ALLMAP_SIZE < PGTABLE_SIZE
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#error "Gimme some space for page table!"
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#endif
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#define PGTABLE_START KERNEL_ALLMAP_START
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/* Remaining kernel-mappable space: */
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#define KERNEL_MAPPED_START (KERNEL_ALLMAP_START + PGTABLE_SIZE)
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#define KERNEL_MAPPED_SIZE (KERNEL_ALLMAP_SIZE - PGTABLE_SIZE)
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#if KERNEL_MAPPED_SIZE < 0x01000000 /* 16 MB is arbitrary for now */
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# error "Shouldn't the kernel have at least *some* mappable space?"
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#endif
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#define MAX_LOW_MEMORY XCHAL_KSEG_CACHED_SIZE
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#endif
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/*
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* Some constants used elsewhere, but perhaps only in Xtensa header
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* files, so maybe we can get rid of some and access compile-time HAL
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* directly...
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*
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* Note: We assume that system RAM is located at the very start of the
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* kernel segments !!
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*/
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#define KERNEL_VM_LOW XCHAL_KSEG_CACHED_VADDR
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#define KERNEL_VM_HIGH XCHAL_KSEG_BYPASS_VADDR
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#define KERNEL_SPACE XCHAL_KSEG_CACHED_VADDR
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/*
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* Returns the physical/virtual addresses of the kernel space
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* (works with the cached kernel segment only, which is the
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* one normally used for kernel operation).
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*/
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/* PHYSICAL BYPASS CACHED
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*
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* bypass vaddr bypass paddr * cached vaddr
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* cached vaddr cached paddr bypass vaddr *
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* bypass paddr * bypass vaddr cached vaddr
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* cached paddr * bypass vaddr cached vaddr
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* other * * *
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*/
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#define PHYSADDR(a) \
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(((unsigned)(a) >= XCHAL_KSEG_BYPASS_VADDR \
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&& (unsigned)(a) < XCHAL_KSEG_BYPASS_VADDR + XCHAL_KSEG_BYPASS_SIZE) ? \
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(unsigned)(a) - XCHAL_KSEG_BYPASS_VADDR + XCHAL_KSEG_BYPASS_PADDR : \
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((unsigned)(a) >= XCHAL_KSEG_CACHED_VADDR \
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&& (unsigned)(a) < XCHAL_KSEG_CACHED_VADDR + XCHAL_KSEG_CACHED_SIZE) ? \
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(unsigned)(a) - XCHAL_KSEG_CACHED_VADDR + XCHAL_KSEG_CACHED_PADDR : \
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(unsigned)(a))
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#define BYPASS_ADDR(a) \
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(((unsigned)(a) >= XCHAL_KSEG_BYPASS_PADDR \
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&& (unsigned)(a) < XCHAL_KSEG_BYPASS_PADDR + XCHAL_KSEG_BYPASS_SIZE) ? \
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(unsigned)(a) - XCHAL_KSEG_BYPASS_PADDR + XCHAL_KSEG_BYPASS_VADDR : \
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((unsigned)(a) >= XCHAL_KSEG_CACHED_PADDR \
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&& (unsigned)(a) < XCHAL_KSEG_CACHED_PADDR + XCHAL_KSEG_CACHED_SIZE) ? \
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(unsigned)(a) - XCHAL_KSEG_CACHED_PADDR + XCHAL_KSEG_BYPASS_VADDR : \
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((unsigned)(a) >= XCHAL_KSEG_CACHED_VADDR \
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&& (unsigned)(a) < XCHAL_KSEG_CACHED_VADDR+XCHAL_KSEG_CACHED_SIZE)? \
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(unsigned)(a) - XCHAL_KSEG_CACHED_VADDR+XCHAL_KSEG_BYPASS_VADDR: \
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(unsigned)(a))
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#define CACHED_ADDR(a) \
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(((unsigned)(a) >= XCHAL_KSEG_BYPASS_PADDR \
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&& (unsigned)(a) < XCHAL_KSEG_BYPASS_PADDR + XCHAL_KSEG_BYPASS_SIZE) ? \
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(unsigned)(a) - XCHAL_KSEG_BYPASS_PADDR + XCHAL_KSEG_CACHED_VADDR : \
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((unsigned)(a) >= XCHAL_KSEG_CACHED_PADDR \
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&& (unsigned)(a) < XCHAL_KSEG_CACHED_PADDR + XCHAL_KSEG_CACHED_SIZE) ? \
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(unsigned)(a) - XCHAL_KSEG_CACHED_PADDR + XCHAL_KSEG_CACHED_VADDR : \
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((unsigned)(a) >= XCHAL_KSEG_BYPASS_VADDR \
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&& (unsigned)(a) < XCHAL_KSEG_BYPASS_VADDR+XCHAL_KSEG_BYPASS_SIZE) ? \
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(unsigned)(a) - XCHAL_KSEG_BYPASS_VADDR+XCHAL_KSEG_CACHED_VADDR : \
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(unsigned)(a))
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#define PHYSADDR_IO(a) \
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(((unsigned)(a) >= XCHAL_KIO_BYPASS_VADDR \
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&& (unsigned)(a) < XCHAL_KIO_BYPASS_VADDR + XCHAL_KIO_BYPASS_SIZE) ? \
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(unsigned)(a) - XCHAL_KIO_BYPASS_VADDR + XCHAL_KIO_BYPASS_PADDR : \
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((unsigned)(a) >= XCHAL_KIO_CACHED_VADDR \
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&& (unsigned)(a) < XCHAL_KIO_CACHED_VADDR + XCHAL_KIO_CACHED_SIZE) ? \
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(unsigned)(a) - XCHAL_KIO_CACHED_VADDR + XCHAL_KIO_CACHED_PADDR : \
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(unsigned)(a))
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#define BYPASS_ADDR_IO(a) \
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(((unsigned)(a) >= XCHAL_KIO_BYPASS_PADDR \
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&& (unsigned)(a) < XCHAL_KIO_BYPASS_PADDR + XCHAL_KIO_BYPASS_SIZE) ? \
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(unsigned)(a) - XCHAL_KIO_BYPASS_PADDR + XCHAL_KIO_BYPASS_VADDR : \
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((unsigned)(a) >= XCHAL_KIO_CACHED_PADDR \
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&& (unsigned)(a) < XCHAL_KIO_CACHED_PADDR + XCHAL_KIO_CACHED_SIZE) ? \
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(unsigned)(a) - XCHAL_KIO_CACHED_PADDR + XCHAL_KIO_BYPASS_VADDR : \
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((unsigned)(a) >= XCHAL_KIO_CACHED_VADDR \
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&& (unsigned)(a) < XCHAL_KIO_CACHED_VADDR + XCHAL_KIO_CACHED_SIZE) ? \
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(unsigned)(a) - XCHAL_KIO_CACHED_VADDR + XCHAL_KIO_BYPASS_VADDR : \
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(unsigned)(a))
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#define CACHED_ADDR_IO(a) \
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(((unsigned)(a) >= XCHAL_KIO_BYPASS_PADDR \
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&& (unsigned)(a) < XCHAL_KIO_BYPASS_PADDR + XCHAL_KIO_BYPASS_SIZE) ? \
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(unsigned)(a) - XCHAL_KIO_BYPASS_PADDR + XCHAL_KIO_CACHED_VADDR : \
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((unsigned)(a) >= XCHAL_KIO_CACHED_PADDR \
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&& (unsigned)(a) < XCHAL_KIO_CACHED_PADDR + XCHAL_KIO_CACHED_SIZE) ? \
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(unsigned)(a) - XCHAL_KIO_CACHED_PADDR + XCHAL_KIO_CACHED_VADDR : \
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((unsigned)(a) >= XCHAL_KIO_BYPASS_VADDR \
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&& (unsigned)(a) < XCHAL_KIO_BYPASS_VADDR + XCHAL_KIO_BYPASS_SIZE) ? \
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(unsigned)(a) - XCHAL_KIO_BYPASS_VADDR + XCHAL_KIO_CACHED_VADDR : \
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(unsigned)(a))
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#endif /* _XTENSA_ADDRSPACE_H */
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