abdba61a43
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
343 lines
11 KiB
C
343 lines
11 KiB
C
/*
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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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#include <asm/page.h>
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#include <asm/ptrace.h>
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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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#define current_text_addr() ({ void *pc; __asm__("basr %0,0":"=a"(pc)); pc; })
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/*
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* CPU type and hardware bug flags. Kept separately for each CPU.
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* Members of this structure are referenced in head.S, so think twice
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* before touching them. [mj]
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*/
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typedef struct
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{
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unsigned int version : 8;
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unsigned int ident : 24;
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unsigned int machine : 16;
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unsigned int unused : 16;
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} __attribute__ ((packed)) cpuid_t;
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struct cpuinfo_S390
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{
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cpuid_t cpu_id;
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__u16 cpu_addr;
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__u16 cpu_nr;
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unsigned long loops_per_jiffy;
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unsigned long *pgd_quick;
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#ifdef __s390x__
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unsigned long *pmd_quick;
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#endif /* __s390x__ */
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unsigned long *pte_quick;
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unsigned long pgtable_cache_sz;
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};
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extern void print_cpu_info(struct cpuinfo_S390 *);
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/* Lazy FPU handling on uni-processor */
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extern struct task_struct *last_task_used_math;
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/*
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* User space process size: 2GB for 31 bit, 4TB for 64 bit.
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*/
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#ifndef __s390x__
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# define TASK_SIZE (0x80000000UL)
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# define TASK_UNMAPPED_BASE (TASK_SIZE / 2)
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# define DEFAULT_TASK_SIZE (0x80000000UL)
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#else /* __s390x__ */
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# define TASK_SIZE (test_thread_flag(TIF_31BIT) ? \
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(0x80000000UL) : (0x40000000000UL))
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# define TASK_UNMAPPED_BASE (TASK_SIZE / 2)
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# define DEFAULT_TASK_SIZE (0x40000000000UL)
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#endif /* __s390x__ */
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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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unsigned long user_seg; /* HSTD */
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mm_segment_t mm_segment;
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unsigned long prot_addr; /* address of protection-excep. */
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unsigned int error_code; /* error-code of last prog-excep. */
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unsigned int trap_no;
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per_struct per_info;
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/* Used to give failing instruction back to user for ieee exceptions */
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unsigned long ieee_instruction_pointer;
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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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};
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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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#ifndef __s390x__
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# define __SWAPPER_PG_DIR __pa(&swapper_pg_dir[0]) + _SEGMENT_TABLE
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#else /* __s390x__ */
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# define __SWAPPER_PG_DIR __pa(&swapper_pg_dir[0]) + _REGION_TABLE
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#endif /* __s390x__ */
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#define INIT_THREAD {{0,{{0},{0},{0},{0},{0},{0},{0},{0},{0},{0}, \
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{0},{0},{0},{0},{0},{0}}}, \
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{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, \
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sizeof(init_stack) + (unsigned long) &init_stack, \
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__SWAPPER_PG_DIR, \
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{0}, \
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0,0,0, \
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(per_struct) {{{{0,}}},0,0,0,0,{{0,}}}, \
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0, 0 \
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}
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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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#ifndef __s390x__
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#define start_thread(regs, new_psw, new_stackp) do { \
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regs->psw.mask = PSW_USER_BITS; \
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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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} while (0)
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#else /* __s390x__ */
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#define start_thread(regs, new_psw, new_stackp) do { \
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regs->psw.mask = PSW_USER_BITS; \
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regs->psw.addr = new_psw; \
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regs->gprs[15] = new_stackp; \
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} while (0)
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#define start_thread31(regs, new_psw, new_stackp) do { \
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regs->psw.mask = PSW_USER32_BITS; \
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regs->psw.addr = new_psw; \
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regs->gprs[15] = new_stackp; \
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} while (0)
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#endif /* __s390x__ */
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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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/* 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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/*
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* Print register of task into buffer. Used in fs/proc/array.c.
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*/
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extern char *task_show_regs(struct task_struct *task, char *buffer);
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extern void show_registers(struct pt_regs *regs);
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extern void show_trace(struct task_struct *task, unsigned long *sp);
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unsigned long get_wchan(struct task_struct *p);
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#define task_pt_regs(tsk) ((struct pt_regs *) \
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(task_stack_page(tsk) + THREAD_SIZE) - 1)
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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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/*
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* Give up the time slice of the virtual PU.
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*/
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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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asm volatile ("diag 0,0,68" : : : "memory");
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else
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barrier();
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}
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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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asm volatile ("lpsw 0(%0)" : : "a" (&psw), "m" (psw) : "cc" );
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#else
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asm volatile ("lpswe 0(%0)" : : "a" (&psw), "m" (psw) : "cc" );
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#endif
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}
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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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psw.mask = mask;
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#ifndef __s390x__
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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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" st %0,4(%1)\n"
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" lpsw 0(%1)\n"
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"1:"
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: "=&d" (addr) : "a" (&psw), "m" (psw) : "memory", "cc" );
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#else /* __s390x__ */
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asm volatile (
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" larl %0,1f\n"
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" stg %0,8(%1)\n"
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" lpswe 0(%1)\n"
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"1:"
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: "=&d" (addr) : "a" (&psw), "m" (psw) : "memory", "cc" );
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#endif /* __s390x__ */
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}
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/*
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* Function to stop a processor until an interruption occurred
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*/
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static inline void enabled_wait(void)
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{
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__load_psw_mask(PSW_BASE_BITS | PSW_MASK_IO | PSW_MASK_EXT |
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PSW_MASK_MCHECK | PSW_MASK_WAIT | PSW_DEFAULT_KEY);
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}
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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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static inline void disabled_wait(unsigned long code)
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{
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unsigned long ctl_buf;
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psw_t dw_psw;
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dw_psw.mask = PSW_BASE_BITS | PSW_MASK_WAIT;
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dw_psw.addr = code;
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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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asm volatile (" 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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#else /* __s390x__ */
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asm volatile (" 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 */
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" stfpc 0x31c(1)\n" /* store fpu control */
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" std 0,0x200(1)\n" /* store f0 */
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" std 1,0x208(1)\n" /* store f1 */
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" std 2,0x210(1)\n" /* store f2 */
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" std 3,0x218(1)\n" /* store f3 */
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" std 4,0x220(1)\n" /* store f4 */
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" std 5,0x228(1)\n" /* store f5 */
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" std 6,0x230(1)\n" /* store f6 */
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" std 7,0x238(1)\n" /* store f7 */
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" std 8,0x240(1)\n" /* store f8 */
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" std 9,0x248(1)\n" /* store f9 */
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" std 10,0x250(1)\n" /* store f10 */
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" std 11,0x258(1)\n" /* store f11 */
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" std 12,0x260(1)\n" /* store f12 */
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" std 13,0x268(1)\n" /* store f13 */
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" std 14,0x270(1)\n" /* store f14 */
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" std 15,0x278(1)\n" /* store f15 */
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" stmg 0,15,0x280(1)\n" /* store general registers */
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" stctg 0,15,0x380(1)\n" /* store control registers */
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" oi 0x384(1),0x10\n" /* fake protection bit */
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" lpswe 0(%1)"
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: "=m" (ctl_buf)
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: "a" (&dw_psw), "a" (&ctl_buf),
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"m" (dw_psw) : "cc", "0", "1");
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#endif /* __s390x__ */
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}
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/*
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* CPU idle notifier chain.
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*/
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#define CPU_IDLE 0
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#define CPU_NOT_IDLE 1
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struct notifier_block;
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int register_idle_notifier(struct notifier_block *nb);
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int unregister_idle_notifier(struct notifier_block *nb);
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#endif
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#endif /* __ASM_S390_PROCESSOR_H */
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