14da93626SDavid Hildenbrand /* 24da93626SDavid Hildenbrand * Copyright (c) 2017 Red Hat Inc 34da93626SDavid Hildenbrand * 44da93626SDavid Hildenbrand * Authors: 54da93626SDavid Hildenbrand * David Hildenbrand <david@redhat.com> 64da93626SDavid Hildenbrand * 74da93626SDavid Hildenbrand * This code is free software; you can redistribute it and/or modify it 84da93626SDavid Hildenbrand * under the terms of the GNU Library General Public License version 2. 94da93626SDavid Hildenbrand */ 104da93626SDavid Hildenbrand #ifndef _ASMS390X_IRQ_H_ 114da93626SDavid Hildenbrand #define _ASMS390X_IRQ_H_ 124da93626SDavid Hildenbrand #include <asm/arch_def.h> 134da93626SDavid Hildenbrand 144da93626SDavid Hildenbrand void handle_pgm_int(void); 15*0f87a91aSJanosch Frank void handle_ext_int(void); 16*0f87a91aSJanosch Frank void handle_mcck_int(void); 17*0f87a91aSJanosch Frank void handle_io_int(void); 18*0f87a91aSJanosch Frank void handle_svc_int(void); 194da93626SDavid Hildenbrand void expect_pgm_int(void); 203db880b6SDavid Hildenbrand uint16_t clear_pgm_int(void); 214da93626SDavid Hildenbrand void check_pgm_int_code(uint16_t code); 224da93626SDavid Hildenbrand 232667b05eSThomas Huth /* Activate low-address protection */ 242667b05eSThomas Huth static inline void low_prot_enable(void) 252667b05eSThomas Huth { 262667b05eSThomas Huth uint64_t cr0; 272667b05eSThomas Huth 282667b05eSThomas Huth asm volatile (" stctg %%c0,%%c0,%0 " : : "Q"(cr0) : "memory"); 292667b05eSThomas Huth cr0 |= 1ULL << (63-35); 302667b05eSThomas Huth asm volatile (" lctlg %%c0,%%c0,%0 " : : "Q"(cr0)); 312667b05eSThomas Huth } 322667b05eSThomas Huth 332667b05eSThomas Huth /* Disable low-address protection */ 342667b05eSThomas Huth static inline void low_prot_disable(void) 352667b05eSThomas Huth { 362667b05eSThomas Huth uint64_t cr0; 372667b05eSThomas Huth 382667b05eSThomas Huth asm volatile (" stctg %%c0,%%c0,%0 " : : "Q"(cr0) : "memory"); 392667b05eSThomas Huth cr0 &= ~(1ULL << (63-35)); 402667b05eSThomas Huth asm volatile (" lctlg %%c0,%%c0,%0 " : : "Q"(cr0)); 412667b05eSThomas Huth } 422667b05eSThomas Huth 434da93626SDavid Hildenbrand #endif 44