mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 04:18:39 +08:00
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>
43 lines
686 B
ArmAsm
43 lines
686 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
|
|
|
|
#include <linux/linkage.h>
|
|
#include <linux/init.h>
|
|
#include <asm/page.h>
|
|
#include <abi/entry.h>
|
|
|
|
__HEAD
|
|
ENTRY(_start)
|
|
SETUP_MMU
|
|
|
|
/* set stack point */
|
|
lrw r6, init_thread_union + THREAD_SIZE
|
|
mov sp, r6
|
|
|
|
jmpi csky_start
|
|
END(_start)
|
|
|
|
#ifdef CONFIG_SMP
|
|
.align 10
|
|
ENTRY(_start_smp_secondary)
|
|
SETUP_MMU
|
|
|
|
#ifdef CONFIG_PAGE_OFFSET_80000000
|
|
lrw r6, secondary_msa1
|
|
ld.w r6, (r6, 0)
|
|
mtcr r6, cr<31, 15>
|
|
#endif
|
|
|
|
lrw r6, secondary_pgd
|
|
ld.w r6, (r6, 0)
|
|
mtcr r6, cr<28, 15>
|
|
mtcr r6, cr<29, 15>
|
|
|
|
/* set stack point */
|
|
lrw r6, secondary_stack
|
|
ld.w r6, (r6, 0)
|
|
mov sp, r6
|
|
|
|
jmpi csky_start_secondary
|
|
END(_start_smp_secondary)
|
|
#endif
|