patch-2.4.2 linux/include/asm-s390x/processor.h

• Lines: 228
• Date: Tue Feb 13 14:13:44 2001
• Orig file: v2.4.1/linux/include/asm-s390x/processor.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.1/linux/include/asm-s390x/processor.h linux/include/asm-s390x/processor.h
@@ -0,0 +1,227 @@
+/*
+ *  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/page.h>
+#include <asm/ptrace.h>
+
+/*
+ * 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;
+
+struct cpuinfo_S390
+{
+        cpuid_t  cpu_id;
+        unsigned long loops_per_jiffy;
+        unsigned long *pgd_quick;
+        unsigned long *pmd_quick;
+        unsigned long *pte_quick;
+        unsigned long pgtable_cache_sz;
+        __u16    cpu_addr;
+        __u16    cpu_nr;
+        __u16    pad[2];
+};
+
+extern void print_cpu_info(struct cpuinfo_S390 *);
+
+/* Lazy FPU handling on uni-processor */
+extern struct task_struct *last_task_used_math;
+
+#define S390_FLAG_31BIT 0x01UL
+
+/*
+ * User space process size: 4TB (default).
+ */
+#define TASK_SIZE       (0x40000000000UL)
+#define TASK31_SIZE     (0x80000000UL)
+
+/* This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#define TASK_UNMAPPED_BASE      ((current->thread.flags & S390_FLAG_31BIT) ? \
+	(TASK31_SIZE / 2) : (TASK_SIZE / 2))
+
+#define THREAD_SIZE (4*PAGE_SIZE)
+
+typedef struct {
+       __u32 ar4;
+} mm_segment_t;
+
+/* if you change the thread_struct structure, you must
+ * update the _TSS_* defines in entry.S
+ */
+
+struct thread_struct
+ {
+        struct pt_regs *regs;         /* the user registers can be found on*/
+	s390_fp_regs fp_regs;
+        __u32   ar2;                   /* kernel access register 2         */
+        __u32   ar4;                   /* kernel access register 4         */
+        addr_t  ksp;                   /* kernel stack pointer             */
+        addr_t  user_seg;              /* HSTD                             */
+        addr_t  prot_addr;             /* address of protection-excep.     */
+        __u32   error_code;            /* error-code of last prog-excep.   */
+        __u32   trap_no;
+        per_struct per_info;/* Must be aligned on an 4 byte boundary*/
+	addr_t  ieee_instruction_pointer; 
+	/* Used to give failing instruction back to user for ieee exceptions */
+	unsigned long flags;            /* various flags */
+};
+
+typedef struct thread_struct thread_struct;
+
+#define INIT_MMAP \
+{ &init_mm, 0, 0, NULL, PAGE_SHARED, \
+VM_READ | VM_WRITE | VM_EXEC, 1, NULL,NULL }
+
+#define INIT_THREAD { (struct pt_regs *) 0,                       \
+                    { 0,{{0},{0},{0},{0},{0},{0},{0},{0},{0},{0}, \
+			    {0},{0},{0},{0},{0},{0}}},            \
+                     0, 0,                                        \
+                    sizeof(init_stack) + (addr_t) &init_stack,    \
+              (__pa((addr_t) &swapper_pg_dir[0]) + _REGION_TABLE),\
+                     0,0,0,                                       \
+                     (per_struct) {{{{0,}}},0,0,0,0,{{0,}}},      \
+		     0					          \
+} 
+
+/* need to define ... */
+#define start_thread(regs, new_psw, new_stackp) do {            \
+        regs->psw.mask  = _USER_PSW_MASK;                       \
+        regs->psw.addr  = new_psw;                              \
+        regs->gprs[15]  = new_stackp;                           \
+} while (0)
+
+#define start_thread31(regs, new_psw, new_stackp) do {          \
+	regs->psw.mask  = _USER_PSW_MASK & ~(1L << 32);		\
+        regs->psw.addr  = new_psw;                              \
+        regs->gprs[15]  = new_stackp;                           \
+} while (0)
+
+
+/* Forward declaration, a strange C thing */
+struct mm_struct;
+
+/* 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);
+
+/* Copy and release all segment info associated with a VM */
+#define copy_segments(nr, mm)           do { } while (0)
+#define release_segments(mm)            do { } while (0)
+
+/*
+ * Return saved PC of a blocked thread. used in kernel/sched
+ */
+extern inline unsigned long thread_saved_pc(struct thread_struct *t)
+{
+        return (t->regs) ? ((unsigned long)t->regs->psw.addr) : 0;
+}
+
+unsigned long get_wchan(struct task_struct *p);
+#define KSTK_EIP(tsk)   ((tsk)->thread.regs->psw.addr)
+#define KSTK_ESP(tsk)   ((tsk)->thread.ksp)
+
+/* Allocation and freeing of basic task resources. */
+/*
+ * NOTE! The task struct and the stack go together
+ */
+#define alloc_task_struct() \
+        ((struct task_struct *) __get_free_pages(GFP_KERNEL,2))
+#define free_task_struct(p)     free_pages((unsigned long)(p),2)
+#define get_task_struct(tsk)      atomic_inc(&virt_to_page(tsk)->count)
+
+#define init_task       (init_task_union.task)
+#define init_stack      (init_task_union.stack)
+
+/*
+ * Set of msr bits that gdb can change on behalf of a process.
+ */
+/* Only let our hackers near the condition codes */
+#define PSW_MASK_DEBUGCHANGE    0x0000300000000000UL
+/* Don't let em near the addressing mode either */    
+#define PSW_ADDR_DEBUGCHANGE    0xFFFFFFFFFFFFFFFFUL
+#define PSW_ADDR_MASK           0xFFFFFFFFFFFFFFFFUL
+/* Program event recording mask */    
+#define PSW_PER_MASK            0x4000000000000000UL
+#define USER_STD_MASK           0x0000000000000080UL
+#define PSW_PROBLEM_STATE       0x0001000000000000UL
+
+/*
+ * Function to drop a processor into disabled wait state
+ */
+
+static inline void disabled_wait(addr_t code)
+{
+        char psw_buffer[2*sizeof(psw_t)];
+        char ctl_buf[8];
+        psw_t *dw_psw = (psw_t *)(((unsigned long) &psw_buffer+sizeof(psw_t)-1)
+                                  & -sizeof(psw_t));
+
+        dw_psw->mask = 0x0002000180000000;
+        dw_psw->addr = code;
+        /* 
+         * Store status and then load disabled wait psw,
+         * the processor is dead afterwards
+         */
+        asm volatile ("    stctg 0,0,0(%1)\n"
+                      "    ni    4(%1),0xef\n" /* switch off protection */
+                      "    lctlg 0,0,0(%1)\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(%0)"
+                      : : "a" (dw_psw), "a" (&ctl_buf) : "0", "1");
+}
+
+#endif                                 /* __ASM_S390_PROCESSOR_H           */
+