b46dcfa378
Currently code for exception/IRQ vectors is stored in kernel image as initialization data and is copied to its working addresses during startup. It doesn't always make sense. In many cases vectors location can be automatically decided at kernel link time and code can be placed right there. This is especially useful for XIP kernel. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
127 lines
4 KiB
C
127 lines
4 KiB
C
/*
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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 <platform/hardware.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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