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linux/include/asm-xtensa/fixmap.h

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