diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/kernel/hibernate.c')
| -rwxr-xr-x | ANDROID_3.4.5/arch/arm/kernel/hibernate.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/ANDROID_3.4.5/arch/arm/kernel/hibernate.c b/ANDROID_3.4.5/arch/arm/kernel/hibernate.c deleted file mode 100755 index 4aa1dc98..00000000 --- a/ANDROID_3.4.5/arch/arm/kernel/hibernate.c +++ /dev/null @@ -1,177 +0,0 @@ -/* - * Hibernation support specific for ARM - * - * Derived from work on ARM hibernation support by: - * - * Ubuntu project, hibernation support for mach-dove - * Copyright (C) 2010 Nokia Corporation (Hiroshi Doyu) - * Copyright (C) 2010 Texas Instruments, Inc. (Teerth Reddy et al.) - * https://lkml.org/lkml/2010/6/18/4 - * https://lists.linux-foundation.org/pipermail/linux-pm/2010-June/027422.html - * https://patchwork.kernel.org/patch/96442/ - * - * Copyright (C) 2006 Rafael J. Wysocki <rjw@sisk.pl> - * - * License terms: GNU General Public License (GPL) version 2 - */ -/* - from patch - ARM hibernation / suspend-to-disk - https://github.com/russdill/linux/commit/498079e0d06d2c0bd575ab4114d16b09e1ff3111 - add by roger. -*/ -#include <linux/mm.h> -#include <linux/suspend.h> -#include <asm/tlbflush.h> -#include <asm/cacheflush.h> -#include <asm/system_misc.h> -#include <linux/slab.h> -#include <linux/crc32.h> -#include <asm/idmap.h> -#include <asm/suspend.h> - -#define _PRINT_PAGE_CRC_ 1//also need to define in kernel/power/power.h -#undef _PRINT_PAGE_CRC_ - -extern const void __nosave_begin, __nosave_end; -extern void cpu_resume(void); -extern void cpu_resume_restore_nosave(void); - -u32 __nosave_backup_phys; //__nosave data backup here. -u32 __nosave_begin_phys; //__nosave data orginal location begin from here. -u32 __nosave_end_phys; //__nosave data orginal location end from here. - -void swsusp_arch_add_info(char *archdata, size_t size) -{ - *(u32 *) archdata = virt_to_phys(cpu_resume); - printk("\n phyaddr of cpu_resume : 0x%x \n", virt_to_phys(cpu_resume)); - *(((u32 *)archdata) + 1) = __nosave_backup_phys; - *(((u32 *)archdata) + 2) = __nosave_begin_phys; - *(((u32 *)archdata) + 3) = __nosave_end_phys; -/* - Save and check idmap_pgd. - When using Kernel restoring method, the "restoring kernel" should has the same - idmap_pgd as the "restored kernel". - If not, the mmu table may be corrupted during the restoration, - which may cause data abort (MMU translation fail). -*/ - *(((u32 *)archdata) + 4) = (u32)idmap_pgd; -} - -int pfn_is_nosave(unsigned long pfn) -{ - unsigned long nosave_begin_pfn = - __pa_symbol(&__nosave_begin) >> PAGE_SHIFT; - unsigned long nosave_end_pfn = - PAGE_ALIGN(__pa_symbol(&__nosave_end)) >> PAGE_SHIFT; - - return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn); -} - -void notrace save_processor_state(void) -{ - WARN_ON(num_online_cpus() != 1); - flush_thread(); - local_fiq_disable(); -} - -void notrace restore_processor_state(void) -{ - local_fiq_enable(); -} - -/* - * Snapshot kernel memory and reset the system. - * After resume, the hibernation snapshot is written out. - */ -static int notrace __swsusp_arch_save_image(unsigned long unused) -{ - extern int swsusp_save(void); - int ret; - - ret = swsusp_save(); - if (ret == 0) - soft_restart(virt_to_phys(cpu_resume)); - return ret; -} - -/* - * Save the current CPU state before suspend / poweroff. - */ -int notrace swsusp_arch_suspend(void) -{ - return cpu_suspend(0, __swsusp_arch_save_image); -} - -/* - * The framework loads the hibernation image into a linked list anchored - * at restore_pblist, for swsusp_arch_resume() to copy back to the proper - * destinations. - * - * To make this work if resume is triggered from initramfs, the - * pagetables need to be switched to allow writes to kernel mem. - */ -static void notrace __swsusp_arch_restore_image(void *unused) -{ - extern struct pbe *restore_pblist; - struct pbe *pbe; -#ifdef _PRINT_PAGE_CRC_// add by roger. - unsigned long crc_le; - unsigned char *virt_addr; - unsigned long pfn; -#endif - - - cpu_switch_mm(idmap_pgd, &init_mm); - for (pbe = restore_pblist; pbe; pbe = pbe->next){ - copy_page(pbe->orig_address, pbe->address); - #ifdef _PRINT_PAGE_CRC_ - virt_addr = pbe->orig_address; - pfn = page_to_pfn(virt_to_page(virt_addr)); - crc_le = crc32_le(0, virt_addr, PAGE_SIZE); - printk("pfn:%lu:phy_addr:0x%x:crc:%lu:virt_addr:0x%x\n", - pfn, pfn*PAGE_SIZE, crc_le, virt_addr); - #endif - } - soft_restart_noirq(virt_to_phys(cpu_resume)); -} - -static u8 __swsusp_resume_stk[PAGE_SIZE/2] __nosavedata; - -/* - * Resume from the hibernation image. - * Due to the kernel heap / data restore, stack contents change underneath - * and that would make function calls impossible; switch to a temporary - * stack within the nosave region to avoid that problem. - */ -int __naked swsusp_arch_resume(void) -{ - extern void call_with_stack(void (*fn)(void *), void *arg, void *sp); - - cpu_init(); /* get a clean PSR */ - call_with_stack(__swsusp_arch_restore_image, 0, - __swsusp_resume_stk + sizeof(__swsusp_resume_stk)); - - return 0; -} - -static int __init swsusp_arch_init(void) -{ - char *backup; - size_t len; - len = &__nosave_end - &__nosave_begin; - backup = kmalloc(len, GFP_KERNEL); - if (backup) { - printk("%s: Backed up %d byte nosave region\n", __func__, len); - memcpy(backup, &__nosave_begin, len); - } - - __nosave_backup_phys = virt_to_phys(backup); - __nosave_begin_phys = virt_to_phys(&__nosave_begin); - __nosave_end_phys = virt_to_phys(&__nosave_end); - printk("__nosave_backup_phys=0x%x\n",__nosave_backup_phys); - printk("__nosave_begin_phys=0x%x\n",__nosave_begin_phys); - printk("__nosave_end_phys=0x%x\n",__nosave_end_phys); - return 0; -} -late_initcall(swsusp_arch_init); |