1. 根目录:
2. arch
3. xtensa
4. include
5. asm
6. vectors.h

/*
 * arch/xtensa/include/asm/xchal_vaddr_remap.h
 *
 * Xtensa macros for MMU V3 Support. Deals with re-mapping the Virtual
 * Memory Addresses from "Virtual == Physical" to their prevvious V2 MMU
 * mappings (KSEG at 0xD0000000 and KIO at 0XF0000000).
 *
 * 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) 2008 - 2012 Tensilica Inc.
 *
 * Pete Delaney <piet@tensilica.com>
 * Marc Gauthier <marc@tensilica.com
 */

#ifndef _XTENSA_VECTORS_H
#define _XTENSA_VECTORS_H

#include <variant/core.h>

#if defined(CONFIG_MMU)

/* Will Become VECBASE */
#define VIRTUAL_MEMORY_ADDRESS		0xD0000000

/* Image Virtual Start Address */
#define KERNELOFFSET			0xD0003000

#if defined(XCHAL_HAVE_PTP_MMU) && XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
  /* MMU v3  - XCHAL_HAVE_PTP_MMU  == 1 */
  #define PHYSICAL_MEMORY_ADDRESS	0x00000000
  #define LOAD_MEMORY_ADDRESS		0x00003000
#else
  /* MMU V2 -  XCHAL_HAVE_PTP_MMU  == 0 */
  #define PHYSICAL_MEMORY_ADDRESS	0xD0000000
  #define LOAD_MEMORY_ADDRESS		0xD0003000
#endif

#else /* !defined(CONFIG_MMU) */
  /* MMU Not being used - Virtual == Physical */

  /* VECBASE */
  #define VIRTUAL_MEMORY_ADDRESS	0x00002000

  /* Location of the start of the kernel text, _start */
  #define KERNELOFFSET			0x00003000
  #define PHYSICAL_MEMORY_ADDRESS	0x00000000

  /* Loaded just above possibly live vectors */
  #define LOAD_MEMORY_ADDRESS		0x00003000

#endif /* CONFIG_MMU */

#define XC_VADDR(offset)		(VIRTUAL_MEMORY_ADDRESS  + offset)
#define XC_PADDR(offset)		(PHYSICAL_MEMORY_ADDRESS + offset)

/* Used to set VECBASE register */
#define VECBASE_RESET_VADDR		VIRTUAL_MEMORY_ADDRESS

#define RESET_VECTOR_VECOFS		(XCHAL_RESET_VECTOR_VADDR - \
						VECBASE_RESET_VADDR)
#define RESET_VECTOR_VADDR		XC_VADDR(RESET_VECTOR_VECOFS)

#define RESET_VECTOR1_VECOFS		(XCHAL_RESET_VECTOR1_VADDR - \
						VECBASE_RESET_VADDR)
#define RESET_VECTOR1_VADDR		XC_VADDR(RESET_VECTOR1_VECOFS)

#if XCHAL_HAVE_VECBASE

#define USER_VECTOR_VADDR		XC_VADDR(XCHAL_USER_VECOFS)
#define KERNEL_VECTOR_VADDR		XC_VADDR(XCHAL_KERNEL_VECOFS)
#define DOUBLEEXC_VECTOR_VADDR		XC_VADDR(XCHAL_DOUBLEEXC_VECOFS)
#define WINDOW_VECTORS_VADDR		XC_VADDR(XCHAL_WINDOW_OF4_VECOFS)
#define INTLEVEL2_VECTOR_VADDR		XC_VADDR(XCHAL_INTLEVEL2_VECOFS)
#define INTLEVEL3_VECTOR_VADDR		XC_VADDR(XCHAL_INTLEVEL3_VECOFS)
#define INTLEVEL4_VECTOR_VADDR		XC_VADDR(XCHAL_INTLEVEL4_VECOFS)
#define INTLEVEL5_VECTOR_VADDR		XC_VADDR(XCHAL_INTLEVEL5_VECOFS)
#define INTLEVEL6_VECTOR_VADDR		XC_VADDR(XCHAL_INTLEVEL6_VECOFS)

#define DEBUG_VECTOR_VADDR		XC_VADDR(XCHAL_DEBUG_VECOFS)

#undef  XCHAL_NMI_VECTOR_VADDR
#define XCHAL_NMI_VECTOR_VADDR		XC_VADDR(XCHAL_NMI_VECOFS)

#undef  XCHAL_INTLEVEL7_VECTOR_VADDR
#define XCHAL_INTLEVEL7_VECTOR_VADDR	XC_VADDR(XCHAL_INTLEVEL7_VECOFS)

/*
 * These XCHAL_* #defines from varian/core.h
 * are not valid to use with V3 MMU. Non-XCHAL
 * constants are defined above and should be used.
 */
#undef  XCHAL_VECBASE_RESET_VADDR
#undef  XCHAL_RESET_VECTOR0_VADDR
#undef  XCHAL_USER_VECTOR_VADDR
#undef  XCHAL_KERNEL_VECTOR_VADDR
#undef  XCHAL_DOUBLEEXC_VECTOR_VADDR
#undef  XCHAL_WINDOW_VECTORS_VADDR
#undef  XCHAL_INTLEVEL2_VECTOR_VADDR
#undef  XCHAL_INTLEVEL3_VECTOR_VADDR
#undef  XCHAL_INTLEVEL4_VECTOR_VADDR
#undef  XCHAL_INTLEVEL5_VECTOR_VADDR
#undef  XCHAL_INTLEVEL6_VECTOR_VADDR
#undef  XCHAL_DEBUG_VECTOR_VADDR
#undef  XCHAL_NMI_VECTOR_VADDR
#undef  XCHAL_INTLEVEL7_VECTOR_VADDR

#else

#define USER_VECTOR_VADDR		XCHAL_USER_VECTOR_VADDR
#define KERNEL_VECTOR_VADDR		XCHAL_KERNEL_VECTOR_VADDR
#define DOUBLEEXC_VECTOR_VADDR		XCHAL_DOUBLEEXC_VECTOR_VADDR
#define WINDOW_VECTORS_VADDR		XCHAL_WINDOW_VECTORS_VADDR
#define INTLEVEL2_VECTOR_VADDR		XCHAL_INTLEVEL2_VECTOR_VADDR
#define INTLEVEL3_VECTOR_VADDR		XCHAL_INTLEVEL3_VECTOR_VADDR
#define INTLEVEL4_VECTOR_VADDR		XCHAL_INTLEVEL4_VECTOR_VADDR
#define INTLEVEL5_VECTOR_VADDR		XCHAL_INTLEVEL5_VECTOR_VADDR
#define INTLEVEL6_VECTOR_VADDR		XCHAL_INTLEVEL6_VECTOR_VADDR
#define DEBUG_VECTOR_VADDR		XCHAL_DEBUG_VECTOR_VADDR

#endif

#endif /* _XTENSA_VECTORS_H */