1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * hibernate.c: Hibernaton support specific for sparc64. 4 * 5 * Copyright (C) 2013 Kirill V Tkhai (tkhai@yandex.ru) 6 */ 7 8 #include <linux/suspend.h> 9 #include <linux/mm.h> 10 11 #include <asm/hibernate.h> 12 #include <asm/visasm.h> 13 #include <asm/page.h> 14 #include <asm/sections.h> 15 #include <asm/tlb.h> 16 17 struct saved_context saved_context; 18 19 /* 20 * pfn_is_nosave - check if given pfn is in the 'nosave' section 21 */ 22 23 int pfn_is_nosave(unsigned long pfn) 24 { 25 unsigned long nosave_begin_pfn = PFN_DOWN((unsigned long)&__nosave_begin); 26 unsigned long nosave_end_pfn = PFN_DOWN((unsigned long)&__nosave_end); 27 28 return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn); 29 } 30 31 void save_processor_state(void) 32 { 33 save_and_clear_fpu(); 34 } 35 36 void restore_processor_state(void) 37 { 38 struct mm_struct *mm = current->active_mm; 39 40 tsb_context_switch_ctx(mm, CTX_HWBITS(mm->context)); 41 } 42