105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
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/*
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* Kernel virtual memory layout definitions.
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file "COPYING" in the main directory of
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* this archive for more details.
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*
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* Copyright (C) 2016 Cadence Design Systems Inc.
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*/
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#ifndef _XTENSA_KMEM_LAYOUT_H
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#define _XTENSA_KMEM_LAYOUT_H
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#include <asm/core.h>
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#include <asm/types.h>
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#ifdef CONFIG_MMU
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/*
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* Fixed TLB translations in the processor.
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*/
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#define XCHAL_PAGE_TABLE_VADDR __XTENSA_UL_CONST(0x80000000)
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#define XCHAL_PAGE_TABLE_SIZE __XTENSA_UL_CONST(0x00400000)
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#if defined(CONFIG_XTENSA_KSEG_MMU_V2)
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#define XCHAL_KSEG_CACHED_VADDR __XTENSA_UL_CONST(0xd0000000)
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#define XCHAL_KSEG_BYPASS_VADDR __XTENSA_UL_CONST(0xd8000000)
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#define XCHAL_KSEG_SIZE __XTENSA_UL_CONST(0x08000000)
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#define XCHAL_KSEG_ALIGNMENT __XTENSA_UL_CONST(0x08000000)
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#define XCHAL_KSEG_TLB_WAY 5
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#define XCHAL_KIO_TLB_WAY 6
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#elif defined(CONFIG_XTENSA_KSEG_256M)
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#define XCHAL_KSEG_CACHED_VADDR __XTENSA_UL_CONST(0xb0000000)
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#define XCHAL_KSEG_BYPASS_VADDR __XTENSA_UL_CONST(0xc0000000)
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#define XCHAL_KSEG_SIZE __XTENSA_UL_CONST(0x10000000)
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#define XCHAL_KSEG_ALIGNMENT __XTENSA_UL_CONST(0x10000000)
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#define XCHAL_KSEG_TLB_WAY 6
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#define XCHAL_KIO_TLB_WAY 6
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#elif defined(CONFIG_XTENSA_KSEG_512M)
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#define XCHAL_KSEG_CACHED_VADDR __XTENSA_UL_CONST(0xa0000000)
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#define XCHAL_KSEG_BYPASS_VADDR __XTENSA_UL_CONST(0xc0000000)
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#define XCHAL_KSEG_SIZE __XTENSA_UL_CONST(0x20000000)
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#define XCHAL_KSEG_ALIGNMENT __XTENSA_UL_CONST(0x10000000)
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#define XCHAL_KSEG_TLB_WAY 6
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#define XCHAL_KIO_TLB_WAY 6
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#else
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#error Unsupported KSEG configuration
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#endif
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#ifdef CONFIG_KSEG_PADDR
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#define XCHAL_KSEG_PADDR __XTENSA_UL_CONST(CONFIG_KSEG_PADDR)
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#else
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#define XCHAL_KSEG_PADDR __XTENSA_UL_CONST(0x00000000)
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#endif
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#if XCHAL_KSEG_PADDR & (XCHAL_KSEG_ALIGNMENT - 1)
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#error XCHAL_KSEG_PADDR is not properly aligned to XCHAL_KSEG_ALIGNMENT
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#endif
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#endif
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/* KIO definition */
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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_USE_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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/* KERNEL_STACK definition */
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#ifndef CONFIG_KASAN
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#define KERNEL_STACK_SHIFT 13
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#else
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#define KERNEL_STACK_SHIFT 15
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#endif
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#define KERNEL_STACK_SIZE (1 << KERNEL_STACK_SHIFT)
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#endif
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