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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 | /* * 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; __u16 cpu_addr; __u16 cpu_nr; unsigned long loops_per_jiffy; unsigned long *pgd_quick; unsigned long *pte_quick; unsigned long pgtable_cache_sz; }; extern void print_cpu_info(struct cpuinfo_S390 *); /* Lazy FPU handling on uni-processor */ extern struct task_struct *last_task_used_math; /* * User space process size: 2GB (default). */ #define TASK_SIZE (0x80000000) /* This decides where the kernel will search for a free chunk of vm * space during mmap's. */ #define TASK_UNMAPPED_BASE (TASK_SIZE / 2) #define THREAD_SIZE (2*PAGE_SIZE) typedef struct { unsigned long seg; unsigned long acc4; } 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 */ __u32 ksp; /* kernel stack pointer */ __u32 user_seg; /* HSTD */ __u32 error_code; /* error-code of last prog-excep. */ __u32 prot_addr; /* address of protection-excep. */ __u32 trap_no; /* perform syscall argument validation (get/set_fs) */ mm_segment_t fs; per_struct per_info;/* Must be aligned on an 4 byte boundary*/ /* Used to give failing instruction back to user for ieee exceptions */ addr_t ieee_instruction_pointer; /* pfault_wait is used to block the process on a pfault event */ addr_t pfault_wait; }; 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) + (__u32) &init_stack, \ (__pa((__u32) &swapper_pg_dir[0]) + _SEGMENT_TABLE),\ 0,0,0, \ (mm_segment_t) { 0,1}, \ (per_struct) {{{{0,}}},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 | 0x80000000; \ 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,1)) #define free_task_struct(p) free_pages((unsigned long)(p),1) #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 0x00003000UL /* Don't let em near the addressing mode either */ #define PSW_ADDR_DEBUGCHANGE 0x7FFFFFFFUL #define PSW_ADDR_MASK 0x7FFFFFFFUL /* Program event recording mask */ #define PSW_PER_MASK 0x40000000UL #define USER_STD_MASK 0x00000080UL #define PSW_PROBLEM_STATE 0x00010000UL /* * Function to drop a processor into disabled wait state */ static inline void disabled_wait(unsigned long code) { char psw_buffer[2*sizeof(psw_t)]; char ctl_buf[4]; psw_t *dw_psw = (psw_t *)(((unsigned long) &psw_buffer+sizeof(psw_t)-1) & -sizeof(psw_t)); dw_psw->mask = 0x000a0000; dw_psw->addr = code; /* * Store status and then load disabled wait psw, * the processor is dead afterwards */ asm volatile (" stctl 0,0,0(%1)\n" " ni 0(%1),0xef\n" /* switch off protection */ " lctl 0,0,0(%1)\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 0(%1),0x10\n" /* fake protection bit */ " lpsw 0(%0)" : : "a" (dw_psw), "a" (&ctl_buf) : "cc" ); } #endif /* __ASM_S390_PROCESSOR_H */ |