1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * swsusp.c - SuperH hibernation support 4 * 5 * Copyright (C) 2009 Magnus Damm 6 */ 7 8 #include <linux/mm.h> 9 #include <linux/sched.h> 10 #include <linux/suspend.h> 11 #include <asm/suspend.h> 12 #include <asm/sections.h> 13 #include <asm/tlbflush.h> 14 #include <asm/page.h> 15 #include <asm/fpu.h> 16 17 struct swsusp_arch_regs swsusp_arch_regs_cpu0; 18 19 int pfn_is_nosave(unsigned long pfn) 20 { 21 unsigned long begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT; 22 unsigned long end_pfn = PAGE_ALIGN(__pa(&__nosave_end)) >> PAGE_SHIFT; 23 24 return (pfn >= begin_pfn) && (pfn < end_pfn); 25 } 26 27 void save_processor_state(void) 28 { 29 init_fpu(current); 30 } 31 32 void restore_processor_state(void) 33 { 34 local_flush_tlb_all(); 35 } 36