tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * arch/xtensa/include/asm/xchal_vaddr_remap.h
3 *
4 * Xtensa macros for MMU V3 Support. Deals with re-mapping the Virtual
5 * Memory Addresses from "Virtual == Physical" to their prevvious V2 MMU
6 * mappings (KSEG at 0xD0000000 and KIO at 0XF0000000).
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
10 * for more details.
11 *
12 * Copyright (C) 2008 - 2012 Tensilica Inc.
13 *
14 * Pete Delaney <piet@tensilica.com>
15 * Marc Gauthier <marc@tensilica.com
16 */
17
18#ifndef _XTENSA_VECTORS_H
19#define _XTENSA_VECTORS_H
20
21#include <variant/core.h>
22#include <platform/hardware.h>
23#include <asm/kmem_layout.h>
24
25#if XCHAL_HAVE_PTP_MMU
26#define XCHAL_KIO_CACHED_VADDR 0xe0000000
27#define XCHAL_KIO_BYPASS_VADDR 0xf0000000
28#define XCHAL_KIO_DEFAULT_PADDR 0xf0000000
29#else
30#define XCHAL_KIO_BYPASS_VADDR XCHAL_KIO_PADDR
31#define XCHAL_KIO_DEFAULT_PADDR 0x90000000
32#endif
33#define XCHAL_KIO_SIZE 0x10000000
34
35#if (!XCHAL_HAVE_PTP_MMU || XCHAL_HAVE_SPANNING_WAY) && defined(CONFIG_OF)
36#define XCHAL_KIO_PADDR xtensa_get_kio_paddr()
37#ifndef __ASSEMBLY__
38extern unsigned long xtensa_kio_paddr;
39
40static inline unsigned long xtensa_get_kio_paddr(void)
41{
42 return xtensa_kio_paddr;
43}
44#endif
45#else
46#define XCHAL_KIO_PADDR XCHAL_KIO_DEFAULT_PADDR
47#endif
48
49#if defined(CONFIG_MMU)
50
51#if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
52/* Image Virtual Start Address */
53#define KERNELOFFSET (XCHAL_KSEG_CACHED_VADDR + \
54 CONFIG_KERNEL_LOAD_ADDRESS - \
55 XCHAL_KSEG_PADDR)
56#else
57#define KERNELOFFSET CONFIG_KERNEL_LOAD_ADDRESS
58#endif
59
60#else /* !defined(CONFIG_MMU) */
61 /* MMU Not being used - Virtual == Physical */
62
63/* Location of the start of the kernel text, _start */
64#define KERNELOFFSET CONFIG_KERNEL_LOAD_ADDRESS
65
66
67#endif /* CONFIG_MMU */
68
69#define RESET_VECTOR1_VADDR (XCHAL_RESET_VECTOR1_VADDR)
70#ifdef CONFIG_VECTORS_OFFSET
71#define VECBASE_VADDR (KERNELOFFSET - CONFIG_VECTORS_OFFSET)
72#else
73#define VECBASE_VADDR _vecbase
74#endif
75
76#if defined(XCHAL_HAVE_VECBASE) && XCHAL_HAVE_VECBASE
77
78#define VECTOR_VADDR(offset) (VECBASE_VADDR + offset)
79
80#define USER_VECTOR_VADDR VECTOR_VADDR(XCHAL_USER_VECOFS)
81#define KERNEL_VECTOR_VADDR VECTOR_VADDR(XCHAL_KERNEL_VECOFS)
82#define DOUBLEEXC_VECTOR_VADDR VECTOR_VADDR(XCHAL_DOUBLEEXC_VECOFS)
83#define WINDOW_VECTORS_VADDR VECTOR_VADDR(XCHAL_WINDOW_OF4_VECOFS)
84#define INTLEVEL2_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL2_VECOFS)
85#define INTLEVEL3_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL3_VECOFS)
86#define INTLEVEL4_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL4_VECOFS)
87#define INTLEVEL5_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL5_VECOFS)
88#define INTLEVEL6_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL6_VECOFS)
89#define INTLEVEL7_VECTOR_VADDR VECTOR_VADDR(XCHAL_INTLEVEL7_VECOFS)
90#define DEBUG_VECTOR_VADDR VECTOR_VADDR(XCHAL_DEBUG_VECOFS)
91
92/*
93 * These XCHAL_* #defines from varian/core.h
94 * are not valid to use with V3 MMU. Non-XCHAL
95 * constants are defined above and should be used.
96 */
97#undef XCHAL_VECBASE_RESET_VADDR
98#undef XCHAL_USER_VECTOR_VADDR
99#undef XCHAL_KERNEL_VECTOR_VADDR
100#undef XCHAL_DOUBLEEXC_VECTOR_VADDR
101#undef XCHAL_WINDOW_VECTORS_VADDR
102#undef XCHAL_INTLEVEL2_VECTOR_VADDR
103#undef XCHAL_INTLEVEL3_VECTOR_VADDR
104#undef XCHAL_INTLEVEL4_VECTOR_VADDR
105#undef XCHAL_INTLEVEL5_VECTOR_VADDR
106#undef XCHAL_INTLEVEL6_VECTOR_VADDR
107#undef XCHAL_INTLEVEL7_VECTOR_VADDR
108#undef XCHAL_DEBUG_VECTOR_VADDR
109
110#else
111
112#define USER_VECTOR_VADDR XCHAL_USER_VECTOR_VADDR
113#define KERNEL_VECTOR_VADDR XCHAL_KERNEL_VECTOR_VADDR
114#define DOUBLEEXC_VECTOR_VADDR XCHAL_DOUBLEEXC_VECTOR_VADDR
115#define WINDOW_VECTORS_VADDR XCHAL_WINDOW_VECTORS_VADDR
116#define INTLEVEL2_VECTOR_VADDR XCHAL_INTLEVEL2_VECTOR_VADDR
117#define INTLEVEL3_VECTOR_VADDR XCHAL_INTLEVEL3_VECTOR_VADDR
118#define INTLEVEL4_VECTOR_VADDR XCHAL_INTLEVEL4_VECTOR_VADDR
119#define INTLEVEL5_VECTOR_VADDR XCHAL_INTLEVEL5_VECTOR_VADDR
120#define INTLEVEL6_VECTOR_VADDR XCHAL_INTLEVEL6_VECTOR_VADDR
121#define INTLEVEL7_VECTOR_VADDR XCHAL_INTLEVEL6_VECTOR_VADDR
122#define DEBUG_VECTOR_VADDR XCHAL_DEBUG_VECTOR_VADDR
123
124#endif
125
126#endif /* _XTENSA_VECTORS_H */