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/core.h> 15 #include <asm/types.h> 16 17 #ifdef CONFIG_MMU 18 19 /* 20 * Fixed TLB translations in the processor. 21 */ 22 23 #define XCHAL_PAGE_TABLE_VADDR __XTENSA_UL_CONST(0x80000000) 24 #define XCHAL_PAGE_TABLE_SIZE __XTENSA_UL_CONST(0x00400000) 25 26 #if defined(CONFIG_XTENSA_KSEG_MMU_V2) 27 28 #define XCHAL_KSEG_CACHED_VADDR __XTENSA_UL_CONST(0xd0000000) 29 #define XCHAL_KSEG_BYPASS_VADDR __XTENSA_UL_CONST(0xd8000000) 30 #define XCHAL_KSEG_SIZE __XTENSA_UL_CONST(0x08000000) 31 #define XCHAL_KSEG_ALIGNMENT __XTENSA_UL_CONST(0x08000000) 32 #define XCHAL_KSEG_TLB_WAY 5 33 #define XCHAL_KIO_TLB_WAY 6 34 35 #elif defined(CONFIG_XTENSA_KSEG_256M) 36 37 #define XCHAL_KSEG_CACHED_VADDR __XTENSA_UL_CONST(0xb0000000) 38 #define XCHAL_KSEG_BYPASS_VADDR __XTENSA_UL_CONST(0xc0000000) 39 #define XCHAL_KSEG_SIZE __XTENSA_UL_CONST(0x10000000) 40 #define XCHAL_KSEG_ALIGNMENT __XTENSA_UL_CONST(0x10000000) 41 #define XCHAL_KSEG_TLB_WAY 6 42 #define XCHAL_KIO_TLB_WAY 6 43 44 #elif defined(CONFIG_XTENSA_KSEG_512M) 45 46 #define XCHAL_KSEG_CACHED_VADDR __XTENSA_UL_CONST(0xa0000000) 47 #define XCHAL_KSEG_BYPASS_VADDR __XTENSA_UL_CONST(0xc0000000) 48 #define XCHAL_KSEG_SIZE __XTENSA_UL_CONST(0x20000000) 49 #define XCHAL_KSEG_ALIGNMENT __XTENSA_UL_CONST(0x10000000) 50 #define XCHAL_KSEG_TLB_WAY 6 51 #define XCHAL_KIO_TLB_WAY 6 52 53 #else 54 #error Unsupported KSEG configuration 55 #endif 56 57 #ifdef CONFIG_KSEG_PADDR 58 #define XCHAL_KSEG_PADDR __XTENSA_UL_CONST(CONFIG_KSEG_PADDR) 59 #else 60 #define XCHAL_KSEG_PADDR __XTENSA_UL_CONST(0x00000000) 61 #endif 62 63 #if XCHAL_KSEG_PADDR & (XCHAL_KSEG_ALIGNMENT - 1) 64 #error XCHAL_KSEG_PADDR is not properly aligned to XCHAL_KSEG_ALIGNMENT 65 #endif 66 67 #endif 68 69 /* KIO definition */ 70 71 #if XCHAL_HAVE_PTP_MMU 72 #define XCHAL_KIO_CACHED_VADDR 0xe0000000 73 #define XCHAL_KIO_BYPASS_VADDR 0xf0000000 74 #define XCHAL_KIO_DEFAULT_PADDR 0xf0000000 75 #else 76 #define XCHAL_KIO_BYPASS_VADDR XCHAL_KIO_PADDR 77 #define XCHAL_KIO_DEFAULT_PADDR 0x90000000 78 #endif 79 #define XCHAL_KIO_SIZE 0x10000000 80 81 #if (!XCHAL_HAVE_PTP_MMU || XCHAL_HAVE_SPANNING_WAY) && defined(CONFIG_OF) 82 #define XCHAL_KIO_PADDR xtensa_get_kio_paddr() 83 #ifndef __ASSEMBLY__ 84 extern unsigned long xtensa_kio_paddr; 85 86 static inline unsigned long xtensa_get_kio_paddr(void) 87 { 88 return xtensa_kio_paddr; 89 } 90 #endif 91 #else 92 #define XCHAL_KIO_PADDR XCHAL_KIO_DEFAULT_PADDR 93 #endif 94 95 /* KERNEL_STACK definition */ 96 97 #ifndef CONFIG_KASAN 98 #define KERNEL_STACK_SHIFT 13 99 #else 100 #define KERNEL_STACK_SHIFT 15 101 #endif 102 #define KERNEL_STACK_SIZE (1 << KERNEL_STACK_SHIFT) 103 104 #endif 105