126 lines
4 KiB
C
126 lines
4 KiB
C
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/*
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* arch/xtensa/include/asm/xchal_vaddr_remap.h
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*
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* Xtensa macros for MMU V3 Support. Deals with re-mapping the Virtual
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* Memory Addresses from "Virtual == Physical" to their prevvious V2 MMU
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* mappings (KSEG at 0xD0000000 and KIO at 0XF0000000).
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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) 2008 - 2012 Tensilica Inc.
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*
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* Pete Delaney <piet@tensilica.com>
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* Marc Gauthier <marc@tensilica.com
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*/
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#ifndef _XTENSA_VECTORS_H
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#define _XTENSA_VECTORS_H
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#include <variant/core.h>
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#include <asm/kmem_layout.h>
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#if XCHAL_HAVE_PTP_MMU
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#define XCHAL_KIO_CACHED_VADDR 0xe0000000
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#define XCHAL_KIO_BYPASS_VADDR 0xf0000000
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#define XCHAL_KIO_DEFAULT_PADDR 0xf0000000
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#else
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#define XCHAL_KIO_BYPASS_VADDR XCHAL_KIO_PADDR
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#define XCHAL_KIO_DEFAULT_PADDR 0x90000000
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#endif
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#define XCHAL_KIO_SIZE 0x10000000
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#if (!XCHAL_HAVE_PTP_MMU || XCHAL_HAVE_SPANNING_WAY) && defined(CONFIG_OF)
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#define XCHAL_KIO_PADDR xtensa_get_kio_paddr()
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#ifndef __ASSEMBLY__
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extern unsigned long xtensa_kio_paddr;
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static inline unsigned long xtensa_get_kio_paddr(void)
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{
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return xtensa_kio_paddr;
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}
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#endif
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#else
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#define XCHAL_KIO_PADDR XCHAL_KIO_DEFAULT_PADDR
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#endif
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#if defined(CONFIG_MMU)
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#if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
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/* Image Virtual Start Address */
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#define KERNELOFFSET (XCHAL_KSEG_CACHED_VADDR + \
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CONFIG_KERNEL_LOAD_ADDRESS - \
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XCHAL_KSEG_PADDR)
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#else
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#define KERNELOFFSET CONFIG_KERNEL_LOAD_ADDRESS
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#endif
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#else /* !defined(CONFIG_MMU) */
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/* MMU Not being used - Virtual == Physical */
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/* Location of the start of the kernel text, _start */
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#define KERNELOFFSET CONFIG_KERNEL_LOAD_ADDRESS
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#endif /* CONFIG_MMU */
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#define RESET_VECTOR1_VADDR (XCHAL_RESET_VECTOR1_VADDR)
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#ifdef CONFIG_VECTORS_OFFSET
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#define VECBASE_VADDR (KERNELOFFSET - CONFIG_VECTORS_OFFSET)
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#else
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#define VECBASE_VADDR _vecbase
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#endif
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#if defined(XCHAL_HAVE_VECBASE) && XCHAL_HAVE_VECBASE
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#define VECTOR_VADDR(offset) (VECBASE_VADDR + offset)
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#define USER_VECTOR_VADDR VECTOR_VADDR(XCHAL_USER_VECOFS)
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#define KERNEL_VECTOR_VADDR VECTOR_VADDR(XCHAL_KERNEL_VECOFS)
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#define DOUBLEEXC_VECTOR_VADDR VECTOR_VADDR(XCHAL_DOUBLEEXC_VECOFS)
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#define WINDOW_VECTORS_VADDR VECTOR_VADDR(XCHAL_WINDOW_OF4_VECOFS)
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#define INTLEVEL2_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL2_VECOFS)
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#define INTLEVEL3_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL3_VECOFS)
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#define INTLEVEL4_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL4_VECOFS)
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#define INTLEVEL5_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL5_VECOFS)
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#define INTLEVEL6_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL6_VECOFS)
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#define INTLEVEL7_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL7_VECOFS)
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#define DEBUG_VECTOR_VADDR VECTOR_VADDR(XCHAL_DEBUG_VECOFS)
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/*
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* These XCHAL_* #defines from varian/core.h
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* are not valid to use with V3 MMU. Non-XCHAL
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* constants are defined above and should be used.
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*/
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#undef XCHAL_VECBASE_RESET_VADDR
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#undef XCHAL_USER_VECTOR_VADDR
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#undef XCHAL_KERNEL_VECTOR_VADDR
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#undef XCHAL_DOUBLEEXC_VECTOR_VADDR
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#undef XCHAL_WINDOW_VECTORS_VADDR
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#undef XCHAL_INTLEVEL2_VECTOR_VADDR
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#undef XCHAL_INTLEVEL3_VECTOR_VADDR
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#undef XCHAL_INTLEVEL4_VECTOR_VADDR
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#undef XCHAL_INTLEVEL5_VECTOR_VADDR
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#undef XCHAL_INTLEVEL6_VECTOR_VADDR
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#undef XCHAL_INTLEVEL7_VECTOR_VADDR
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#undef XCHAL_DEBUG_VECTOR_VADDR
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#else
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#define USER_VECTOR_VADDR XCHAL_USER_VECTOR_VADDR
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#define KERNEL_VECTOR_VADDR XCHAL_KERNEL_VECTOR_VADDR
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#define DOUBLEEXC_VECTOR_VADDR XCHAL_DOUBLEEXC_VECTOR_VADDR
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#define WINDOW_VECTORS_VADDR XCHAL_WINDOW_VECTORS_VADDR
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#define INTLEVEL2_VECTOR_VADDR XCHAL_INTLEVEL2_VECTOR_VADDR
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#define INTLEVEL3_VECTOR_VADDR XCHAL_INTLEVEL3_VECTOR_VADDR
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#define INTLEVEL4_VECTOR_VADDR XCHAL_INTLEVEL4_VECTOR_VADDR
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#define INTLEVEL5_VECTOR_VADDR XCHAL_INTLEVEL5_VECTOR_VADDR
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#define INTLEVEL6_VECTOR_VADDR XCHAL_INTLEVEL6_VECTOR_VADDR
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#define INTLEVEL7_VECTOR_VADDR XCHAL_INTLEVEL6_VECTOR_VADDR
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#define DEBUG_VECTOR_VADDR XCHAL_DEBUG_VECTOR_VADDR
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#endif
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#endif /* _XTENSA_VECTORS_H */
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