You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
360 lines
9.2 KiB
360 lines
9.2 KiB
/*
|
|
* include/asm-s390/processor.h
|
|
*
|
|
* S390 version
|
|
* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
|
|
* Author(s): Hartmut Penner (hp@de.ibm.com),
|
|
* Martin Schwidefsky (schwidefsky@de.ibm.com)
|
|
*
|
|
* Derived from "include/asm-i386/processor.h"
|
|
* Copyright (C) 1994, Linus Torvalds
|
|
*/
|
|
|
|
#ifndef __ASM_S390_PROCESSOR_H
|
|
#define __ASM_S390_PROCESSOR_H
|
|
|
|
#include <asm/ptrace.h>
|
|
|
|
#ifdef __KERNEL__
|
|
/*
|
|
* Default implementation of macro that returns current
|
|
* instruction pointer ("program counter").
|
|
*/
|
|
#define current_text_addr() ({ void *pc; asm("basr %0,0" : "=a" (pc)); pc; })
|
|
|
|
/*
|
|
* CPU type and hardware bug flags. Kept separately for each CPU.
|
|
* Members of this structure are referenced in head.S, so think twice
|
|
* before touching them. [mj]
|
|
*/
|
|
|
|
typedef struct
|
|
{
|
|
unsigned int version : 8;
|
|
unsigned int ident : 24;
|
|
unsigned int machine : 16;
|
|
unsigned int unused : 16;
|
|
} __attribute__ ((packed)) cpuid_t;
|
|
|
|
static inline void get_cpu_id(cpuid_t *ptr)
|
|
{
|
|
asm volatile("stidp 0(%1)" : "=m" (*ptr) : "a" (ptr));
|
|
}
|
|
|
|
struct cpuinfo_S390
|
|
{
|
|
cpuid_t cpu_id;
|
|
__u16 cpu_addr;
|
|
__u16 cpu_nr;
|
|
unsigned long loops_per_jiffy;
|
|
unsigned long *pgd_quick;
|
|
#ifdef __s390x__
|
|
unsigned long *pmd_quick;
|
|
#endif /* __s390x__ */
|
|
unsigned long *pte_quick;
|
|
unsigned long pgtable_cache_sz;
|
|
};
|
|
|
|
extern void s390_adjust_jiffies(void);
|
|
extern void print_cpu_info(struct cpuinfo_S390 *);
|
|
extern int get_cpu_capability(unsigned int *);
|
|
|
|
/*
|
|
* User space process size: 2GB for 31 bit, 4TB for 64 bit.
|
|
*/
|
|
#ifndef __s390x__
|
|
|
|
#define TASK_SIZE (1UL << 31)
|
|
#define TASK_UNMAPPED_BASE (1UL << 30)
|
|
|
|
#else /* __s390x__ */
|
|
|
|
#define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk,TIF_31BIT) ? \
|
|
(1UL << 31) : (1UL << 53))
|
|
#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_31BIT) ? \
|
|
(1UL << 30) : (1UL << 41))
|
|
#define TASK_SIZE TASK_SIZE_OF(current)
|
|
|
|
#endif /* __s390x__ */
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#ifndef __s390x__
|
|
#define STACK_TOP (1UL << 31)
|
|
#define STACK_TOP_MAX (1UL << 31)
|
|
#else /* __s390x__ */
|
|
#define STACK_TOP (1UL << (test_thread_flag(TIF_31BIT) ? 31:42))
|
|
#define STACK_TOP_MAX (1UL << 42)
|
|
#endif /* __s390x__ */
|
|
|
|
|
|
#endif
|
|
|
|
#define HAVE_ARCH_PICK_MMAP_LAYOUT
|
|
|
|
typedef struct {
|
|
__u32 ar4;
|
|
} mm_segment_t;
|
|
|
|
/*
|
|
* Thread structure
|
|
*/
|
|
struct thread_struct {
|
|
s390_fp_regs fp_regs;
|
|
unsigned int acrs[NUM_ACRS];
|
|
unsigned long ksp; /* kernel stack pointer */
|
|
mm_segment_t mm_segment;
|
|
unsigned long prot_addr; /* address of protection-excep. */
|
|
unsigned int trap_no;
|
|
per_struct per_info;
|
|
/* Used to give failing instruction back to user for ieee exceptions */
|
|
unsigned long ieee_instruction_pointer;
|
|
/* pfault_wait is used to block the process on a pfault event */
|
|
unsigned long pfault_wait;
|
|
};
|
|
|
|
typedef struct thread_struct thread_struct;
|
|
|
|
/*
|
|
* Stack layout of a C stack frame.
|
|
*/
|
|
#ifndef __PACK_STACK
|
|
struct stack_frame {
|
|
unsigned long back_chain;
|
|
unsigned long empty1[5];
|
|
unsigned long gprs[10];
|
|
unsigned int empty2[8];
|
|
};
|
|
#else
|
|
struct stack_frame {
|
|
unsigned long empty1[5];
|
|
unsigned int empty2[8];
|
|
unsigned long gprs[10];
|
|
unsigned long back_chain;
|
|
};
|
|
#endif
|
|
|
|
#define ARCH_MIN_TASKALIGN 8
|
|
|
|
#define INIT_THREAD { \
|
|
.ksp = sizeof(init_stack) + (unsigned long) &init_stack, \
|
|
}
|
|
|
|
/*
|
|
* Do necessary setup to start up a new thread.
|
|
*/
|
|
#define start_thread(regs, new_psw, new_stackp) do { \
|
|
set_fs(USER_DS); \
|
|
regs->psw.mask = psw_user_bits; \
|
|
regs->psw.addr = new_psw | PSW_ADDR_AMODE; \
|
|
regs->gprs[15] = new_stackp; \
|
|
} while (0)
|
|
|
|
#define start_thread31(regs, new_psw, new_stackp) do { \
|
|
set_fs(USER_DS); \
|
|
regs->psw.mask = psw_user32_bits; \
|
|
regs->psw.addr = new_psw | PSW_ADDR_AMODE; \
|
|
regs->gprs[15] = new_stackp; \
|
|
crst_table_downgrade(current->mm, 1UL << 31); \
|
|
} while (0)
|
|
|
|
/* Forward declaration, a strange C thing */
|
|
struct task_struct;
|
|
struct mm_struct;
|
|
struct seq_file;
|
|
|
|
/* Free all resources held by a thread. */
|
|
extern void release_thread(struct task_struct *);
|
|
extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
|
|
|
|
/* Prepare to copy thread state - unlazy all lazy status */
|
|
#define prepare_to_copy(tsk) do { } while (0)
|
|
|
|
/*
|
|
* Return saved PC of a blocked thread.
|
|
*/
|
|
extern unsigned long thread_saved_pc(struct task_struct *t);
|
|
|
|
/*
|
|
* Print register of task into buffer. Used in fs/proc/array.c.
|
|
*/
|
|
extern void task_show_regs(struct seq_file *m, struct task_struct *task);
|
|
|
|
extern void show_code(struct pt_regs *regs);
|
|
|
|
unsigned long get_wchan(struct task_struct *p);
|
|
#define task_pt_regs(tsk) ((struct pt_regs *) \
|
|
(task_stack_page(tsk) + THREAD_SIZE) - 1)
|
|
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->psw.addr)
|
|
#define KSTK_ESP(tsk) (task_pt_regs(tsk)->gprs[15])
|
|
|
|
/*
|
|
* Give up the time slice of the virtual PU.
|
|
*/
|
|
static inline void cpu_relax(void)
|
|
{
|
|
if (MACHINE_HAS_DIAG44)
|
|
asm volatile("diag 0,0,68");
|
|
barrier();
|
|
}
|
|
|
|
static inline void psw_set_key(unsigned int key)
|
|
{
|
|
asm volatile("spka 0(%0)" : : "d" (key));
|
|
}
|
|
|
|
/*
|
|
* Set PSW to specified value.
|
|
*/
|
|
static inline void __load_psw(psw_t psw)
|
|
{
|
|
#ifndef __s390x__
|
|
asm volatile("lpsw 0(%0)" : : "a" (&psw), "m" (psw) : "cc");
|
|
#else
|
|
asm volatile("lpswe 0(%0)" : : "a" (&psw), "m" (psw) : "cc");
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Set PSW mask to specified value, while leaving the
|
|
* PSW addr pointing to the next instruction.
|
|
*/
|
|
|
|
static inline void __load_psw_mask (unsigned long mask)
|
|
{
|
|
unsigned long addr;
|
|
psw_t psw;
|
|
|
|
psw.mask = mask;
|
|
|
|
#ifndef __s390x__
|
|
asm volatile(
|
|
" basr %0,0\n"
|
|
"0: ahi %0,1f-0b\n"
|
|
" st %0,4(%1)\n"
|
|
" lpsw 0(%1)\n"
|
|
"1:"
|
|
: "=&d" (addr) : "a" (&psw), "m" (psw) : "memory", "cc");
|
|
#else /* __s390x__ */
|
|
asm volatile(
|
|
" larl %0,1f\n"
|
|
" stg %0,8(%1)\n"
|
|
" lpswe 0(%1)\n"
|
|
"1:"
|
|
: "=&d" (addr) : "a" (&psw), "m" (psw) : "memory", "cc");
|
|
#endif /* __s390x__ */
|
|
}
|
|
|
|
/*
|
|
* Function to stop a processor until an interruption occurred
|
|
*/
|
|
static inline void enabled_wait(void)
|
|
{
|
|
__load_psw_mask(PSW_BASE_BITS | PSW_MASK_IO | PSW_MASK_EXT |
|
|
PSW_MASK_MCHECK | PSW_MASK_WAIT | PSW_DEFAULT_KEY);
|
|
}
|
|
|
|
/*
|
|
* Function to drop a processor into disabled wait state
|
|
*/
|
|
|
|
static inline void disabled_wait(unsigned long code)
|
|
{
|
|
unsigned long ctl_buf;
|
|
psw_t dw_psw;
|
|
|
|
dw_psw.mask = PSW_BASE_BITS | PSW_MASK_WAIT;
|
|
dw_psw.addr = code;
|
|
/*
|
|
* Store status and then load disabled wait psw,
|
|
* the processor is dead afterwards
|
|
*/
|
|
#ifndef __s390x__
|
|
asm volatile(
|
|
" stctl 0,0,0(%2)\n"
|
|
" ni 0(%2),0xef\n" /* switch off protection */
|
|
" lctl 0,0,0(%2)\n"
|
|
" stpt 0xd8\n" /* store timer */
|
|
" stckc 0xe0\n" /* store clock comparator */
|
|
" stpx 0x108\n" /* store prefix register */
|
|
" stam 0,15,0x120\n" /* store access registers */
|
|
" std 0,0x160\n" /* store f0 */
|
|
" std 2,0x168\n" /* store f2 */
|
|
" std 4,0x170\n" /* store f4 */
|
|
" std 6,0x178\n" /* store f6 */
|
|
" stm 0,15,0x180\n" /* store general registers */
|
|
" stctl 0,15,0x1c0\n" /* store control registers */
|
|
" oi 0x1c0,0x10\n" /* fake protection bit */
|
|
" lpsw 0(%1)"
|
|
: "=m" (ctl_buf)
|
|
: "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc");
|
|
#else /* __s390x__ */
|
|
asm volatile(
|
|
" stctg 0,0,0(%2)\n"
|
|
" ni 4(%2),0xef\n" /* switch off protection */
|
|
" lctlg 0,0,0(%2)\n"
|
|
" lghi 1,0x1000\n"
|
|
" stpt 0x328(1)\n" /* store timer */
|
|
" stckc 0x330(1)\n" /* store clock comparator */
|
|
" stpx 0x318(1)\n" /* store prefix register */
|
|
" 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 */
|
|
" 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)
|
|
: "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc", "0");
|
|
#endif /* __s390x__ */
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
|
|
#define ARCH_LOW_ADDRESS_LIMIT 0x7fffffffUL
|
|
|
|
#endif
|
|
|
|
/*
|
|
* 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
|
|
|
|
#endif /* __ASM_S390_PROCESSOR_H */
|
|
|