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/arch/m32r/include/asm/processor.h

https://bitbucket.org/thekraven/iscream_thunderc-2.6.35
C++ Header | 145 lines | 75 code | 30 blank | 40 comment | 4 complexity | c1f414f51ce4f81584cb65beb2805de6 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
  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#ifdef __KERNEL__
 64#define STACK_TOP	TASK_SIZE
 65#define STACK_TOP_MAX	STACK_TOP
 66#endif
 67
 68/* This decides where the kernel will search for a free chunk of vm
 69 * space during mmap's.
 70 */
 71#define TASK_UNMAPPED_BASE	PAGE_ALIGN(TASK_SIZE / 3)
 72
 73typedef struct {
 74	unsigned long seg;
 75} mm_segment_t;
 76
 77#define MAX_TRAPS 10
 78
 79struct debug_trap {
 80	int nr_trap;
 81	unsigned long	addr[MAX_TRAPS];
 82	unsigned long	insn[MAX_TRAPS];
 83};
 84
 85struct thread_struct {
 86	unsigned long address;
 87	unsigned long trap_no;		/* Trap number  */
 88	unsigned long error_code;	/* Error code of trap */
 89	unsigned long lr;		/* saved pc */
 90	unsigned long sp;		/* user stack pointer */
 91	struct debug_trap debug_trap;
 92};
 93
 94#define INIT_SP	(sizeof(init_stack) + (unsigned long) &init_stack)
 95
 96#define INIT_THREAD	{	\
 97	.sp = INIT_SP,		\
 98}
 99
100/*
101 * Do necessary setup to start up a newly executed thread.
102 */
103
104/* User process Backup PSW */
105#define USERPS_BPSW (M32R_PSW_BSM|M32R_PSW_BIE|M32R_PSW_BPM)
106
107#define start_thread(regs, new_pc, new_spu) 				\
108	do {								\
109		set_fs(USER_DS); 					\
110		regs->psw = (regs->psw | USERPS_BPSW) & 0x0000FFFFUL;	\
111		regs->bpc = new_pc;					\
112		regs->spu = new_spu;					\
113	} while (0)
114
115/* Forward declaration, a strange C thing */
116struct task_struct;
117struct mm_struct;
118
119/* Free all resources held by a thread. */
120extern void release_thread(struct task_struct *);
121
122#define prepare_to_copy(tsk)	do { } while (0)
123
124/*
125 * create a kernel thread without removing it from tasklists
126 */
127extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
128
129/* Copy and release all segment info associated with a VM */
130extern void copy_segments(struct task_struct *p, struct mm_struct * mm);
131extern void release_segments(struct mm_struct * mm);
132
133extern unsigned long thread_saved_pc(struct task_struct *);
134
135/* Copy and release all segment info associated with a VM */
136#define copy_segments(p, mm)  do { } while (0)
137#define release_segments(mm)  do { } while (0)
138
139unsigned long get_wchan(struct task_struct *p);
140#define KSTK_EIP(tsk)  ((tsk)->thread.lr)
141#define KSTK_ESP(tsk)  ((tsk)->thread.sp)
142
143#define cpu_relax()	barrier()
144
145#endif /* _ASM_M32R_PROCESSOR_H */