1 /*
2  * Kernel virtual memory layout definitions.
3  *
4  * This file is subject to the terms and conditions of the GNU General
5  * Public License.  See the file "COPYING" in the main directory of
6  * this archive for more details.
7  *
8  * Copyright (C) 2016 Cadence Design Systems Inc.
9  */
10 
11 #ifndef _XTENSA_KMEM_LAYOUT_H
12 #define _XTENSA_KMEM_LAYOUT_H
13 
14 #include <asm/types.h>
15 
16 #ifdef CONFIG_MMU
17 
18 /*
19  * Fixed TLB translations in the processor.
20  */
21 
22 #define XCHAL_PAGE_TABLE_VADDR	__XTENSA_UL_CONST(0x80000000)
23 #define XCHAL_PAGE_TABLE_SIZE	__XTENSA_UL_CONST(0x00400000)
24 
25 #if defined(CONFIG_XTENSA_KSEG_MMU_V2)
26 
27 #define XCHAL_KSEG_CACHED_VADDR	__XTENSA_UL_CONST(0xd0000000)
28 #define XCHAL_KSEG_BYPASS_VADDR	__XTENSA_UL_CONST(0xd8000000)
29 #define XCHAL_KSEG_SIZE		__XTENSA_UL_CONST(0x08000000)
30 #define XCHAL_KSEG_ALIGNMENT	__XTENSA_UL_CONST(0x08000000)
31 #define XCHAL_KSEG_TLB_WAY	5
32 #define XCHAL_KIO_TLB_WAY	6
33 
34 #elif defined(CONFIG_XTENSA_KSEG_256M)
35 
36 #define XCHAL_KSEG_CACHED_VADDR	__XTENSA_UL_CONST(0xb0000000)
37 #define XCHAL_KSEG_BYPASS_VADDR	__XTENSA_UL_CONST(0xc0000000)
38 #define XCHAL_KSEG_SIZE		__XTENSA_UL_CONST(0x10000000)
39 #define XCHAL_KSEG_ALIGNMENT	__XTENSA_UL_CONST(0x10000000)
40 #define XCHAL_KSEG_TLB_WAY	6
41 #define XCHAL_KIO_TLB_WAY	6
42 
43 #elif defined(CONFIG_XTENSA_KSEG_512M)
44 
45 #define XCHAL_KSEG_CACHED_VADDR	__XTENSA_UL_CONST(0xa0000000)
46 #define XCHAL_KSEG_BYPASS_VADDR	__XTENSA_UL_CONST(0xc0000000)
47 #define XCHAL_KSEG_SIZE		__XTENSA_UL_CONST(0x20000000)
48 #define XCHAL_KSEG_ALIGNMENT	__XTENSA_UL_CONST(0x10000000)
49 #define XCHAL_KSEG_TLB_WAY	6
50 #define XCHAL_KIO_TLB_WAY	6
51 
52 #else
53 #error Unsupported KSEG configuration
54 #endif
55 
56 #ifdef CONFIG_KSEG_PADDR
57 #define XCHAL_KSEG_PADDR        __XTENSA_UL_CONST(CONFIG_KSEG_PADDR)
58 #else
59 #define XCHAL_KSEG_PADDR	__XTENSA_UL_CONST(0x00000000)
60 #endif
61 
62 #if XCHAL_KSEG_PADDR & (XCHAL_KSEG_ALIGNMENT - 1)
63 #error XCHAL_KSEG_PADDR is not properly aligned to XCHAL_KSEG_ALIGNMENT
64 #endif
65 
66 #endif
67 
68 #ifndef CONFIG_KASAN
69 #define KERNEL_STACK_SHIFT	13
70 #else
71 #define KERNEL_STACK_SHIFT	15
72 #endif
73 #define KERNEL_STACK_SIZE	(1 << KERNEL_STACK_SHIFT)
74 
75 #endif
76