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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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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>
42 lines
686 B
ArmAsm
42 lines
686 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/linkage.h>
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#include <linux/init.h>
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#include <asm/page.h>
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#include <abi/entry.h>
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__HEAD
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ENTRY(_start)
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SETUP_MMU
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/* set stack point */
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lrw r6, init_thread_union + THREAD_SIZE
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mov sp, r6
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jmpi csky_start
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END(_start)
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#ifdef CONFIG_SMP
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.align 10
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ENTRY(_start_smp_secondary)
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SETUP_MMU
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#ifdef CONFIG_PAGE_OFFSET_80000000
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lrw r6, secondary_msa1
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ld.w r6, (r6, 0)
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mtcr r6, cr<31, 15>
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#endif
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lrw r6, secondary_pgd
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ld.w r6, (r6, 0)
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mtcr r6, cr<28, 15>
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mtcr r6, cr<29, 15>
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/* set stack point */
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lrw r6, secondary_stack
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ld.w r6, (r6, 0)
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mov sp, r6
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jmpi csky_start_secondary
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END(_start_smp_secondary)
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#endif
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