2005-04-17 00:20:36 +02:00
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/*
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* include/asm-s390/processor.h
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*
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* S390 version
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* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Author(s): Hartmut Penner (hp@de.ibm.com),
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* Martin Schwidefsky (schwidefsky@de.ibm.com)
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*
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* Derived from "include/asm-i386/processor.h"
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* Copyright (C) 1994, Linus Torvalds
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*/
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#ifndef __ASM_S390_PROCESSOR_H
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#define __ASM_S390_PROCESSOR_H
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2008-12-25 13:39:16 +01:00
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#include <linux/linkage.h>
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2009-09-11 10:29:04 +02:00
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#include <asm/cpu.h>
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2009-04-14 15:36:16 +02:00
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#include <asm/page.h>
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2005-04-17 00:20:36 +02:00
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#include <asm/ptrace.h>
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2009-04-14 15:36:16 +02:00
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#include <asm/setup.h>
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2005-04-17 00:20:36 +02:00
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#ifdef __KERNEL__
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/*
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* Default implementation of macro that returns current
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* instruction pointer ("program counter").
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*/
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2006-09-28 16:56:43 +02:00
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#define current_text_addr() ({ void *pc; asm("basr %0,0" : "=a" (pc)); pc; })
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2005-04-17 00:20:36 +02:00
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2009-09-11 10:29:04 +02:00
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static inline void get_cpu_id(struct cpuid *ptr)
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2007-02-21 10:55:18 +01:00
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{
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2010-02-26 22:37:31 +01:00
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asm volatile("stidp %0" : "=Q" (*ptr));
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2007-02-21 10:55:18 +01:00
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}
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2007-02-05 21:18:31 +01:00
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extern void s390_adjust_jiffies(void);
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2007-04-27 16:01:56 +02:00
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extern int get_cpu_capability(unsigned int *);
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2011-10-30 15:17:13 +01:00
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extern const struct seq_operations cpuinfo_op;
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extern int sysctl_ieee_emulation_warnings;
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2005-04-17 00:20:36 +02:00
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/*
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2009-03-18 13:27:36 +01:00
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* User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit.
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2005-04-17 00:20:36 +02:00
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*/
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#ifndef __s390x__
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2008-02-09 18:24:36 +01:00
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#define TASK_SIZE (1UL << 31)
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#define TASK_UNMAPPED_BASE (1UL << 30)
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2005-04-17 00:20:36 +02:00
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#else /* __s390x__ */
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2009-03-18 13:27:36 +01:00
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#define TASK_SIZE_OF(tsk) ((tsk)->mm->context.asce_limit)
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2008-02-09 18:24:36 +01:00
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#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_31BIT) ? \
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(1UL << 30) : (1UL << 41))
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#define TASK_SIZE TASK_SIZE_OF(current)
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2005-04-17 00:20:36 +02:00
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#endif /* __s390x__ */
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2008-02-08 13:19:26 +01:00
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#ifdef __KERNEL__
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2008-02-09 18:24:36 +01:00
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#ifndef __s390x__
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#define STACK_TOP (1UL << 31)
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2008-02-09 18:24:37 +01:00
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#define STACK_TOP_MAX (1UL << 31)
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2008-02-09 18:24:36 +01:00
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#else /* __s390x__ */
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2008-02-09 18:24:37 +01:00
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#define STACK_TOP (1UL << (test_thread_flag(TIF_31BIT) ? 31:42))
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#define STACK_TOP_MAX (1UL << 42)
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2008-02-09 18:24:36 +01:00
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#endif /* __s390x__ */
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2008-02-08 13:19:26 +01:00
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#endif
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2005-04-17 00:20:36 +02:00
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#define HAVE_ARCH_PICK_MMAP_LAYOUT
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typedef struct {
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__u32 ar4;
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} mm_segment_t;
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/*
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* Thread structure
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*/
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struct thread_struct {
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s390_fp_regs fp_regs;
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unsigned int acrs[NUM_ACRS];
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unsigned long ksp; /* kernel stack pointer */
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mm_segment_t mm_segment;
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2011-07-24 10:48:20 +02:00
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unsigned long gmap_addr; /* address of last gmap fault. */
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2011-01-05 12:48:10 +01:00
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struct per_regs per_user; /* User specified PER registers */
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struct per_event per_event; /* Cause of the last PER trap */
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2005-04-17 00:20:36 +02:00
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/* pfault_wait is used to block the process on a pfault event */
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unsigned long pfault_wait;
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2011-05-23 10:24:34 +02:00
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struct list_head list;
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2005-04-17 00:20:36 +02:00
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};
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typedef struct thread_struct thread_struct;
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/*
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* Stack layout of a C stack frame.
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*/
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#ifndef __PACK_STACK
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struct stack_frame {
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unsigned long back_chain;
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unsigned long empty1[5];
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unsigned long gprs[10];
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unsigned int empty2[8];
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};
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#else
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struct stack_frame {
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unsigned long empty1[5];
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unsigned int empty2[8];
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unsigned long gprs[10];
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unsigned long back_chain;
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};
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#endif
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#define ARCH_MIN_TASKALIGN 8
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2007-10-22 12:52:45 +02:00
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#define INIT_THREAD { \
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.ksp = sizeof(init_stack) + (unsigned long) &init_stack, \
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}
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2005-04-17 00:20:36 +02:00
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/*
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* Do necessary setup to start up a new thread.
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*/
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2011-10-30 15:16:50 +01:00
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#define start_thread(regs, new_psw, new_stackp) do { \
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regs->psw.mask = psw_user_bits | PSW_MASK_EA | PSW_MASK_BA; \
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regs->psw.addr = new_psw | PSW_ADDR_AMODE; \
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regs->gprs[15] = new_stackp; \
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2008-07-14 09:58:54 +02:00
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} while (0)
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2011-10-30 15:16:50 +01:00
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#define start_thread31(regs, new_psw, new_stackp) do { \
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regs->psw.mask = psw_user_bits | PSW_MASK_BA; \
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regs->psw.addr = new_psw | PSW_ADDR_AMODE; \
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regs->gprs[15] = new_stackp; \
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crst_table_downgrade(current->mm, 1UL << 31); \
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2005-04-17 00:20:36 +02:00
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} while (0)
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/* Forward declaration, a strange C thing */
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struct task_struct;
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struct mm_struct;
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2008-02-08 13:18:33 +01:00
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struct seq_file;
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2005-04-17 00:20:36 +02:00
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/* Free all resources held by a thread. */
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extern void release_thread(struct task_struct *);
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extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
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/* Prepare to copy thread state - unlazy all lazy status */
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#define prepare_to_copy(tsk) do { } while (0)
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/*
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* Return saved PC of a blocked thread.
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*/
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extern unsigned long thread_saved_pc(struct task_struct *t);
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[S390] Improved oops output.
This patch adds two improvements to the oops output. First it adds an
additional line after the PSW which decodes the different fields of it.
Second a disassembler is added that decodes the instructions surrounding
the faulting PSW. The output of a test oops now looks like this:
kernel BUG at init/main.c:419
illegal operation: 0001 [#1]
CPU: 0 Not tainted
Process swapper (pid: 0, task: 0000000000464968, ksp: 00000000004be000)
Krnl PSW : 0700000180000000 00000000000120b6 (rest_init+0x36/0x38)
R:0 T:1 IO:1 EX:1 Key:0 M:0 W:0 P:0 AS:0 CC:0 PM:0 EA:3
Krnl GPRS: 0000000000000003 00000000004ba017 0000000000000022 0000000000000001
000000000003a5f6 0000000000000000 00000000004be6a8 0000000000000000
0000000000000000 00000000004b8200 0000000000003a50 0000000000008000
0000000000516368 000000000033d008 00000000000120b2 00000000004bdee0
Krnl Code: 00000000000120a6: e3e0f0980024 stg %r14,152(%r15)
00000000000120ac: c0e500014296 brasl %r14,3a5d8
00000000000120b2: a7f40001 brc 15,120b4
>00000000000120b6: 0707 bcr 0,%r7
00000000000120b8: eb7ff0500024 stmg %r7,%r15,80(%r15)
00000000000120be: c0d000195825 larl %r13,33d108
00000000000120c4: a7f13f00 tmll %r15,16128
00000000000120c8: a7840001 brc 8,120ca
Call Trace:
([<00000000000120b2>] rest_init+0x32/0x38)
[<00000000004be614>] start_kernel+0x37c/0x410
[<0000000000012020>] _ehead+0x20/0x80
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2007-04-27 16:01:41 +02:00
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extern void show_code(struct pt_regs *regs);
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2005-04-17 00:20:36 +02:00
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unsigned long get_wchan(struct task_struct *p);
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2006-01-12 10:05:49 +01:00
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#define task_pt_regs(tsk) ((struct pt_regs *) \
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2006-01-12 10:05:50 +01:00
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(task_stack_page(tsk) + THREAD_SIZE) - 1)
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2006-01-12 10:05:49 +01:00
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#define KSTK_EIP(tsk) (task_pt_regs(tsk)->psw.addr)
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#define KSTK_ESP(tsk) (task_pt_regs(tsk)->gprs[15])
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2005-04-17 00:20:36 +02:00
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/*
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* Give up the time slice of the virtual PU.
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*/
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2006-07-12 16:39:58 +02:00
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static inline void cpu_relax(void)
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{
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if (MACHINE_HAS_DIAG44)
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2007-02-05 21:17:20 +01:00
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asm volatile("diag 0,0,68");
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barrier();
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2006-07-12 16:39:58 +02:00
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}
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2005-04-17 00:20:36 +02:00
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2007-06-19 13:10:06 +02:00
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static inline void psw_set_key(unsigned int key)
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{
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asm volatile("spka 0(%0)" : : "d" (key));
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}
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2005-06-25 23:55:30 +02:00
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/*
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* Set PSW to specified value.
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*/
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static inline void __load_psw(psw_t psw)
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{
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#ifndef __s390x__
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2010-02-26 22:37:31 +01:00
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asm volatile("lpsw %0" : : "Q" (psw) : "cc");
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2005-06-25 23:55:30 +02:00
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#else
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2010-02-26 22:37:31 +01:00
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asm volatile("lpswe %0" : : "Q" (psw) : "cc");
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2005-06-25 23:55:30 +02:00
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#endif
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}
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2005-04-17 00:20:36 +02:00
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/*
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* Set PSW mask to specified value, while leaving the
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* PSW addr pointing to the next instruction.
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*/
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static inline void __load_psw_mask (unsigned long mask)
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{
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unsigned long addr;
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psw_t psw;
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2005-06-25 23:55:30 +02:00
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2005-04-17 00:20:36 +02:00
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psw.mask = mask;
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#ifndef __s390x__
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2006-09-28 16:56:43 +02:00
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asm volatile(
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" basr %0,0\n"
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"0: ahi %0,1f-0b\n"
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2010-02-26 22:37:31 +01:00
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" st %0,%O1+4(%R1)\n"
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" lpsw %1\n"
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2005-04-17 00:20:36 +02:00
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"1:"
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2010-02-26 22:37:31 +01:00
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: "=&d" (addr), "=Q" (psw) : "Q" (psw) : "memory", "cc");
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2005-04-17 00:20:36 +02:00
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#else /* __s390x__ */
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2006-09-28 16:56:43 +02:00
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asm volatile(
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" larl %0,1f\n"
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2010-02-26 22:37:31 +01:00
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" stg %0,%O1+8(%R1)\n"
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" lpswe %1\n"
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2005-04-17 00:20:36 +02:00
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"1:"
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2010-02-26 22:37:31 +01:00
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: "=&d" (addr), "=Q" (psw) : "Q" (psw) : "memory", "cc");
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2005-04-17 00:20:36 +02:00
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#endif /* __s390x__ */
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}
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2011-10-30 15:16:48 +01:00
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/*
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* Rewind PSW instruction address by specified number of bytes.
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*/
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static inline unsigned long __rewind_psw(psw_t psw, unsigned long ilc)
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{
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#ifndef __s390x__
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if (psw.addr & PSW_ADDR_AMODE)
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/* 31 bit mode */
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return (psw.addr - ilc) | PSW_ADDR_AMODE;
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/* 24 bit mode */
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return (psw.addr - ilc) & ((1UL << 24) - 1);
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#else
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unsigned long mask;
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mask = (psw.mask & PSW_MASK_EA) ? -1UL :
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(psw.mask & PSW_MASK_BA) ? (1UL << 31) - 1 :
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(1UL << 24) - 1;
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return (psw.addr - ilc) & mask;
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#endif
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}
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2005-04-17 00:20:36 +02:00
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/*
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* Function to drop a processor into disabled wait state
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*/
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2012-01-13 02:17:21 +01:00
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static inline void __noreturn disabled_wait(unsigned long code)
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2005-04-17 00:20:36 +02:00
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{
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unsigned long ctl_buf;
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2005-06-25 23:55:30 +02:00
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psw_t dw_psw;
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2005-04-17 00:20:36 +02:00
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2011-10-30 15:16:50 +01:00
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dw_psw.mask = PSW_MASK_BASE | PSW_MASK_WAIT | PSW_MASK_BA | PSW_MASK_EA;
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2005-06-25 23:55:30 +02:00
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dw_psw.addr = code;
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2005-04-17 00:20:36 +02:00
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/*
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* Store status and then load disabled wait psw,
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* the processor is dead afterwards
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*/
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#ifndef __s390x__
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2006-09-28 16:56:43 +02:00
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asm volatile(
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" stctl 0,0,0(%2)\n"
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" ni 0(%2),0xef\n" /* switch off protection */
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" lctl 0,0,0(%2)\n"
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" stpt 0xd8\n" /* store timer */
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" stckc 0xe0\n" /* store clock comparator */
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" stpx 0x108\n" /* store prefix register */
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" stam 0,15,0x120\n" /* store access registers */
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" std 0,0x160\n" /* store f0 */
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" std 2,0x168\n" /* store f2 */
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" std 4,0x170\n" /* store f4 */
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" std 6,0x178\n" /* store f6 */
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" stm 0,15,0x180\n" /* store general registers */
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" stctl 0,15,0x1c0\n" /* store control registers */
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" oi 0x1c0,0x10\n" /* fake protection bit */
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" lpsw 0(%1)"
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: "=m" (ctl_buf)
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: "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc");
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2005-04-17 00:20:36 +02:00
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#else /* __s390x__ */
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2006-09-28 16:56:43 +02:00
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asm volatile(
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" stctg 0,0,0(%2)\n"
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" ni 4(%2),0xef\n" /* switch off protection */
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" lctlg 0,0,0(%2)\n"
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" lghi 1,0x1000\n"
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" stpt 0x328(1)\n" /* store timer */
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" stckc 0x330(1)\n" /* store clock comparator */
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" stpx 0x318(1)\n" /* store prefix register */
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" stam 0,15,0x340(1)\n"/* store access registers */
|
|
|
|
" stfpc 0x31c(1)\n" /* store fpu control */
|
|
|
|
" std 0,0x200(1)\n" /* store f0 */
|
|
|
|
" std 1,0x208(1)\n" /* store f1 */
|
|
|
|
" std 2,0x210(1)\n" /* store f2 */
|
|
|
|
" std 3,0x218(1)\n" /* store f3 */
|
|
|
|
" std 4,0x220(1)\n" /* store f4 */
|
|
|
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" std 5,0x228(1)\n" /* store f5 */
|
|
|
|
" std 6,0x230(1)\n" /* store f6 */
|
|
|
|
" std 7,0x238(1)\n" /* store f7 */
|
|
|
|
" std 8,0x240(1)\n" /* store f8 */
|
|
|
|
" std 9,0x248(1)\n" /* store f9 */
|
|
|
|
" std 10,0x250(1)\n" /* store f10 */
|
|
|
|
" std 11,0x258(1)\n" /* store f11 */
|
|
|
|
" std 12,0x260(1)\n" /* store f12 */
|
|
|
|
" std 13,0x268(1)\n" /* store f13 */
|
|
|
|
" std 14,0x270(1)\n" /* store f14 */
|
|
|
|
" std 15,0x278(1)\n" /* store f15 */
|
|
|
|
" stmg 0,15,0x280(1)\n"/* store general registers */
|
|
|
|
" stctg 0,15,0x380(1)\n"/* store control registers */
|
|
|
|
" oi 0x384(1),0x10\n"/* fake protection bit */
|
|
|
|
" lpswe 0(%1)"
|
|
|
|
: "=m" (ctl_buf)
|
2009-09-22 22:58:47 +02:00
|
|
|
: "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc", "0", "1");
|
2005-04-17 00:20:36 +02:00
|
|
|
#endif /* __s390x__ */
|
2008-12-25 13:39:16 +01:00
|
|
|
while (1);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2007-02-05 21:18:37 +01:00
|
|
|
/*
|
|
|
|
* Basic Machine Check/Program Check Handler.
|
|
|
|
*/
|
|
|
|
|
|
|
|
extern void s390_base_mcck_handler(void);
|
|
|
|
extern void s390_base_pgm_handler(void);
|
|
|
|
extern void s390_base_ext_handler(void);
|
|
|
|
|
|
|
|
extern void (*s390_base_mcck_handler_fn)(void);
|
|
|
|
extern void (*s390_base_pgm_handler_fn)(void);
|
|
|
|
extern void (*s390_base_ext_handler_fn)(void);
|
|
|
|
|
2006-09-26 08:31:33 +02:00
|
|
|
#define ARCH_LOW_ADDRESS_LIMIT 0x7fffffffUL
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
#endif
|
|
|
|
|
2006-09-20 15:58:20 +02:00
|
|
|
/*
|
|
|
|
* Helper macro for exception table entries
|
|
|
|
*/
|
|
|
|
#ifndef __s390x__
|
|
|
|
#define EX_TABLE(_fault,_target) \
|
|
|
|
".section __ex_table,\"a\"\n" \
|
|
|
|
" .align 4\n" \
|
|
|
|
" .long " #_fault "," #_target "\n" \
|
|
|
|
".previous\n"
|
|
|
|
#else
|
|
|
|
#define EX_TABLE(_fault,_target) \
|
|
|
|
".section __ex_table,\"a\"\n" \
|
|
|
|
" .align 8\n" \
|
|
|
|
" .quad " #_fault "," #_target "\n" \
|
|
|
|
".previous\n"
|
|
|
|
#endif
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
#endif /* __ASM_S390_PROCESSOR_H */
|