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 <linux/config.h>
  18#include <asm/cache.h>
  19#include <asm/ptrace.h>  /* pt_regs */
  20
  21/*
  22 * Default implementation of macro that returns current
  23 * instruction pointer ("program counter").
  24 */
  25#define current_text_addr() ({ __label__ _l; _l: &&_l; })
  26
  27/*
  28 *  CPU type and hardware bug flags. Kept separately for each CPU.
  29 *  Members of this structure are referenced in head.S, so think twice
  30 *  before touching them. [mj]
  31 */
  32
  33struct cpuinfo_m32r {
  34        unsigned long pgtable_cache_sz;
  35        unsigned long cpu_clock;
  36        unsigned long bus_clock;
  37        unsigned long timer_divide;
  38        unsigned long loops_per_jiffy;
  39};
  40
  41/*
  42 * capabilities of CPUs
  43 */
  44
  45extern struct cpuinfo_m32r boot_cpu_data;
  46
  47#ifdef CONFIG_SMP
  48extern struct cpuinfo_m32r cpu_data[];
  49#define current_cpu_data cpu_data[smp_processor_id()]
  50#else
  51#define cpu_data (&boot_cpu_data)
  52#define current_cpu_data boot_cpu_data
  53#endif
  54
  55/*
  56 * User space process size: 2GB (default).
  57 */
  58#ifdef CONFIG_MMU
  59#define TASK_SIZE  (0x80000000UL)
  60#else
  61#define TASK_SIZE  (0x00400000UL)
  62#endif
  63
  64/* This decides where the kernel will search for a free chunk of vm
  65 * space during mmap's.
  66 */
  67#define TASK_UNMAPPED_BASE      PAGE_ALIGN(TASK_SIZE / 3)
  68
  69typedef struct {
  70        unsigned long seg;
  71} mm_segment_t;
  72
  73#define MAX_TRAPS 10
  74
  75struct debug_trap {
  76        int nr_trap;
  77        unsigned long   addr[MAX_TRAPS];
  78        unsigned long   insn[MAX_TRAPS];
  79};
  80
  81struct thread_struct {
  82        unsigned long address;
  83        unsigned long trap_no;          /* Trap number  */
  84        unsigned long error_code;       /* Error code of trap */
  85        unsigned long lr;               /* saved pc */
  86        unsigned long sp;               /* user stack pointer */
  87        struct debug_trap debug_trap;
  88};
  89
  90#define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack)
  91
  92#define INIT_THREAD     {       \
  93        .sp = INIT_SP,          \
  94}
  95
  96/*
  97 * Do necessary setup to start up a newly executed thread.
  98 */
  99
 100/* User process Backup PSW */
 101#define USERPS_BPSW (M32R_PSW_BSM|M32R_PSW_BIE|M32R_PSW_BPM)
 102
 103#define start_thread(regs, new_pc, new_spu)                             \
 104        do {                                                            \
 105                set_fs(USER_DS);                                        \
 106                regs->psw = (regs->psw | USERPS_BPSW) & 0x0000FFFFUL;   \
 107                regs->bpc = new_pc;                                     \
 108                regs->spu = new_spu;                                    \
 109        } while (0)
 110
 111/* Forward declaration, a strange C thing */
 112struct task_struct;
 113struct mm_struct;
 114
 115/* Free all resources held by a thread. */
 116extern void release_thread(struct task_struct *);
 117
 118#define prepare_to_copy(tsk)    do { } while (0)
 119
 120/*
 121 * create a kernel thread without removing it from tasklists
 122 */
 123extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
 124
 125/* Copy and release all segment info associated with a VM */
 126extern void copy_segments(struct task_struct *p, struct mm_struct * mm);
 127extern void release_segments(struct mm_struct * mm);
 128
 129extern unsigned long thread_saved_pc(struct task_struct *);
 130
 131/* Copy and release all segment info associated with a VM */
 132#define copy_segments(p, mm)  do { } while (0)
 133#define release_segments(mm)  do { } while (0)
 134
 135unsigned long get_wchan(struct task_struct *p);
 136#define KSTK_EIP(tsk)  ((tsk)->thread.lr)
 137#define KSTK_ESP(tsk)  ((tsk)->thread.sp)
 138
 139#define THREAD_SIZE (2*PAGE_SIZE)
 140
 141#define cpu_relax()     barrier()
 142
 143#endif /* _ASM_M32R_PROCESSOR_H */
 144