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| /*
| * linux/arch/unicore32/kernel/hibernate_asm.S
| *
| * Code specific to PKUnity SoC and UniCore ISA
| *
| * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
| * Copyright (C) 2001-2010 Guan Xuetao
| *
| * This program is free software; you can redistribute it and/or modify
| * it under the terms of the GNU General Public License version 2 as
| * published by the Free Software Foundation.
| */
|
| #include <linux/sys.h>
| #include <linux/errno.h>
| #include <linux/linkage.h>
| #include <generated/asm-offsets.h>
| #include <asm/page.h>
| #include <asm/pgtable.h>
| #include <asm/assembler.h>
|
| @ restore_image(pgd_t *resume_pg_dir, struct pbe *restore_pblist)
| @ r0: resume_pg_dir
| @ r1: restore_pblist
| @ copy restore_pblist pages
| @ restore registers from swsusp_arch_regs_cpu0
| @
| ENTRY(restore_image)
| sub r0, r0, #PAGE_OFFSET
| mov r5, #0
| movc p0.c6, r5, #6 @invalidate ITLB & DTLB
| movc p0.c2, r0, #0
| nop
| nop
| nop
| nop
| nop
| nop
| nop
|
| .p2align 4,,7
| 101:
| csub.a r1, #0
| beq 109f
|
| ldw r6, [r1+], #PBE_ADDRESS
| ldw r7, [r1+], #PBE_ORIN_ADDRESS
|
| movl ip, #128
| 102: ldm.w (r8 - r15), [r6]+
| stm.w (r8 - r15), [r7]+
| sub.a ip, ip, #1
| bne 102b
|
| ldw r1, [r1+], #PBE_NEXT
| b 101b
|
| .p2align 4,,7
| 109:
| /* go back to the original page tables */
| ldw r0, =swapper_pg_dir
| sub r0, r0, #PAGE_OFFSET
| mov r5, #0
| movc p0.c6, r5, #6
| movc p0.c2, r0, #0
| nop
| nop
| nop
| nop
| nop
| nop
| nop
|
| #ifdef CONFIG_UNICORE_FPU_F64
| ldw ip, 1f
| add ip, ip, #SWSUSP_FPSTATE
| lfm.w (f0 - f7 ), [ip]+
| lfm.w (f8 - f15), [ip]+
| lfm.w (f16 - f23), [ip]+
| lfm.w (f24 - f31), [ip]+
| ldw r4, [ip]
| ctf r4, s31
| #endif
| mov r0, #0x0
| ldw ip, 1f
| add ip, ip, #SWSUSP_CPU
| ldm.w (r4 - r15), [ip]+
| ldm (r16 - r27, sp, pc), [ip]+ @ Load all regs saved previously
|
| .align 2
| 1: .long swsusp_arch_regs_cpu0
|
|
| @ swsusp_arch_suspend()
| @ - prepare pc for resume, return from function without swsusp_save on resume
| @ - save registers in swsusp_arch_regs_cpu0
| @ - call swsusp_save write suspend image
|
| ENTRY(swsusp_arch_suspend)
| ldw ip, 1f
| add ip, ip, #SWSUSP_CPU
| stm.w (r4 - r15), [ip]+
| stm.w (r16 - r27, sp, lr), [ip]+
|
| #ifdef CONFIG_UNICORE_FPU_F64
| ldw ip, 1f
| add ip, ip, #SWSUSP_FPSTATE
| sfm.w (f0 - f7 ), [ip]+
| sfm.w (f8 - f15), [ip]+
| sfm.w (f16 - f23), [ip]+
| sfm.w (f24 - f31), [ip]+
| cff r4, s31
| stw r4, [ip]
| #endif
| b swsusp_save @ no return
|
| 1: .long swsusp_arch_regs_cpu0
|
|
