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0c8a32eed1
There are two ways for translating va to pa for csky: - Use TLB(Translate Lookup Buffer) and PTW (Page Table Walk) - Use SSEG0/1 (Simple Segment Mapping) We use tlb mapping 0-2G and 3G-4G virtual address area and SSEG0/1 are for 2G-2.5G and 2.5G-3G translation. We could disable SSEG0 to use 2G-2.5G as TLB user mapping. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
26 lines
657 B
C
26 lines
657 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_CSKY_MEMORY_H
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#define __ASM_CSKY_MEMORY_H
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#include <linux/compiler.h>
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#include <linux/const.h>
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#include <linux/types.h>
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#include <linux/sizes.h>
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#define FIXADDR_TOP _AC(0xffffc000, UL)
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#define PKMAP_BASE _AC(0xff800000, UL)
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#define VMALLOC_START (PAGE_OFFSET + LOWMEM_LIMIT + (PAGE_SIZE * 8))
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#define VMALLOC_END (PKMAP_BASE - (PAGE_SIZE * 2))
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#ifdef CONFIG_HAVE_TCM
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#ifdef CONFIG_HAVE_DTCM
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#define TCM_NR_PAGES (CONFIG_ITCM_NR_PAGES + CONFIG_DTCM_NR_PAGES)
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#else
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#define TCM_NR_PAGES (CONFIG_ITCM_NR_PAGES)
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#endif
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#define FIXADDR_TCM _AC(FIXADDR_TOP - (TCM_NR_PAGES * PAGE_SIZE), UL)
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#endif
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#endif
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