LXR linux/include/asm-m32r/processor.h

   1#ifndef _ASM_M32R_PROCESSOR_H
   2#define _ASM_M32R_PROCESSOR_H
   3
   4/*
   5 * include/asm-m32r/processor.h
   6 *
   7 * This file is subject to the terms and conditions of the GNU General Public
   8 * License.  See the file "COPYING" in the main directory of this archive
   9 * for more details.
  10 *
  11 * Copyright (C) 1994  Linus Torvalds
  12 * Copyright (C) 2001  Hiroyuki Kondo, Hirokazu Takata, and Hitoshi Yamamoto
  13 * Copyright (C) 2004  Hirokazu Takata <takata at linux-m32r.org>
  14 */
  15
  16#include <linux/kernel.h>
  17#include <asm/cache.h>
  18#include <asm/ptrace.h>  /* pt_regs */
  19
  20/*
  21 * Default implementation of macro that returns current
  22 * instruction pointer ("program counter").
  23 */
  24#define current_text_addr() ({ __label__ _l; _l: &&_l; })
  25
  26/*
  27 *  CPU type and hardware bug flags. Kept separately for each CPU.
  28 *  Members of this structure are referenced in head.S, so think twice
  29 *  before touching them. [mj]
  30 */
  31
  32struct cpuinfo_m32r {
  33        unsigned long pgtable_cache_sz;
  34        unsigned long cpu_clock;
  35        unsigned long bus_clock;
  36        unsigned long timer_divide;
  37        unsigned long loops_per_jiffy;
  38};
  39
  40/*
  41 * capabilities of CPUs
  42 */
  43
  44extern struct cpuinfo_m32r boot_cpu_data;
  45
  46#ifdef CONFIG_SMP
  47extern struct cpuinfo_m32r cpu_data[];
  48#define current_cpu_data cpu_data[smp_processor_id()]
  49#else
  50#define cpu_data (&boot_cpu_data)
  51#define current_cpu_data boot_cpu_data
  52#endif
  53
  54/*
  55 * User space process size: 2GB (default).
  56 */
  57#ifdef CONFIG_MMU
  58#define TASK_SIZE  (0x80000000UL)
  59#else
  60#define TASK_SIZE  (0x00400000UL)
  61#endif
  62
  63/* This decides where the kernel will search for a free chunk of vm
  64 * space during mmap's.
  65 */
  66#define TASK_UNMAPPED_BASE      PAGE_ALIGN(TASK_SIZE / 3)
  67
  68typedef struct {
  69        unsigned long seg;
  70} mm_segment_t;
  71
  72#define MAX_TRAPS 10
  73
  74struct debug_trap {
  75        int nr_trap;
  76        unsigned long   addr[MAX_TRAPS];
  77        unsigned long   insn[MAX_TRAPS];
  78};
  79
  80struct thread_struct {
  81        unsigned long address;
  82        unsigned long trap_no;          /* Trap number  */
  83        unsigned long error_code;       /* Error code of trap */
  84        unsigned long lr;               /* saved pc */
  85        unsigned long sp;               /* user stack pointer */
  86        struct debug_trap debug_trap;
  87};
  88
  89#define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack)
  90
  91#define INIT_THREAD     {       \
  92        .sp = INIT_SP,          \
  93}
  94
  95/*
  96 * Do necessary setup to start up a newly executed thread.
  97 */
  98
  99/* User process Backup PSW */
 100#define USERPS_BPSW (M32R_PSW_BSM|M32R_PSW_BIE|M32R_PSW_BPM)
 101
 102#define start_thread(regs, new_pc, new_spu)                             \
 103        do {                                                            \
 104                set_fs(USER_DS);                                        \
 105                regs->psw = (regs->psw | USERPS_BPSW) & 0x0000FFFFUL;   \
 106                regs->bpc = new_pc;                                     \
 107                regs->spu = new_spu;                                    \
 108        } while (0)
 109
 110/* Forward declaration, a strange C thing */
 111struct task_struct;
 112struct mm_struct;
 113
 114/* Free all resources held by a thread. */
 115extern void release_thread(struct task_struct *);
 116
 117#define prepare_to_copy(tsk)    do { } while (0)
 118
 119/*
 120 * create a kernel thread without removing it from tasklists
 121 */
 122extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
 123
 124/* Copy and release all segment info associated with a VM */
 125extern void copy_segments(struct task_struct *p, struct mm_struct * mm);
 126extern void release_segments(struct mm_struct * mm);
 127
 128extern unsigned long thread_saved_pc(struct task_struct *);
 129
 130/* Copy and release all segment info associated with a VM */
 131#define copy_segments(p, mm)  do { } while (0)
 132#define release_segments(mm)  do { } while (0)
 133
 134unsigned long get_wchan(struct task_struct *p);
 135#define KSTK_EIP(tsk)  ((tsk)->thread.lr)
 136#define KSTK_ESP(tsk)  ((tsk)->thread.sp)
 137
 138#define THREAD_SIZE (2*PAGE_SIZE)
 139
 140#define cpu_relax()     barrier()
 141
 142#endif /* _ASM_M32R_PROCESSOR_H */
 143