55ccf3fe3f
Historical prepare_to_copy() is mostly a no-op, duplicated for majority of the architectures and the rest following the x86 model of flushing the extended register state like fpu there. Remove it and use the arch_dup_task_struct() instead. Suggested-by: Oleg Nesterov <oleg@redhat.com> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Link: http://lkml.kernel.org/r/1336692811-30576-1-git-send-email-suresh.b.siddha@intel.com Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Howells <dhowells@redhat.com> Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Chris Zankel <chris@zankel.net> Cc: Richard Henderson <rth@twiddle.net> Cc: Russell King <linux@arm.linux.org.uk> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Mark Salter <msalter@redhat.com> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: James E.J. Bottomley <jejb@parisc-linux.org> Cc: Helge Deller <deller@gmx.de> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Chen Liqin <liqin.chen@sunplusct.com> Cc: Lennox Wu <lennox.wu@gmail.com> Cc: David S. Miller <davem@davemloft.net> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
142 lines
3.5 KiB
C
142 lines
3.5 KiB
C
#ifndef _ASM_M32R_PROCESSOR_H
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#define _ASM_M32R_PROCESSOR_H
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/*
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* include/asm-m32r/processor.h
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1994 Linus Torvalds
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* Copyright (C) 2001 Hiroyuki Kondo, Hirokazu Takata, and Hitoshi Yamamoto
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* Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org>
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*/
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#include <linux/kernel.h>
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#include <asm/cache.h>
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#include <asm/ptrace.h> /* pt_regs */
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/*
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* Default implementation of macro that returns current
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* instruction pointer ("program counter").
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*/
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#define current_text_addr() ({ __label__ _l; _l: &&_l; })
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/*
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* CPU type and hardware bug flags. Kept separately for each CPU.
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* Members of this structure are referenced in head.S, so think twice
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* before touching them. [mj]
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*/
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struct cpuinfo_m32r {
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unsigned long pgtable_cache_sz;
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unsigned long cpu_clock;
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unsigned long bus_clock;
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unsigned long timer_divide;
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unsigned long loops_per_jiffy;
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};
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/*
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* capabilities of CPUs
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*/
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extern struct cpuinfo_m32r boot_cpu_data;
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#ifdef CONFIG_SMP
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extern struct cpuinfo_m32r cpu_data[];
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#define current_cpu_data cpu_data[smp_processor_id()]
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#else
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#define cpu_data (&boot_cpu_data)
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#define current_cpu_data boot_cpu_data
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#endif
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/*
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* User space process size: 2GB (default).
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*/
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#ifdef CONFIG_MMU
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#define TASK_SIZE (0x80000000UL)
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#else
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#define TASK_SIZE (0x00400000UL)
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#endif
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#ifdef __KERNEL__
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#define STACK_TOP TASK_SIZE
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#define STACK_TOP_MAX STACK_TOP
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#endif
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/* This decides where the kernel will search for a free chunk of vm
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* space during mmap's.
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*/
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#define TASK_UNMAPPED_BASE PAGE_ALIGN(TASK_SIZE / 3)
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typedef struct {
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unsigned long seg;
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} mm_segment_t;
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#define MAX_TRAPS 10
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struct debug_trap {
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int nr_trap;
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unsigned long addr[MAX_TRAPS];
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unsigned long insn[MAX_TRAPS];
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};
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struct thread_struct {
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unsigned long address;
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unsigned long trap_no; /* Trap number */
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unsigned long error_code; /* Error code of trap */
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unsigned long lr; /* saved pc */
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unsigned long sp; /* user stack pointer */
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struct debug_trap debug_trap;
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};
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#define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack)
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#define INIT_THREAD { \
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.sp = INIT_SP, \
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}
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/*
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* Do necessary setup to start up a newly executed thread.
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*/
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/* User process Backup PSW */
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#define USERPS_BPSW (M32R_PSW_BSM|M32R_PSW_BIE|M32R_PSW_BPM)
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#define start_thread(regs, new_pc, new_spu) \
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do { \
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regs->psw = (regs->psw | USERPS_BPSW) & 0x0000FFFFUL; \
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regs->bpc = new_pc; \
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regs->spu = new_spu; \
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} while (0)
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/* Forward declaration, a strange C thing */
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struct task_struct;
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struct mm_struct;
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/* Free all resources held by a thread. */
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extern void release_thread(struct task_struct *);
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/*
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* create a kernel thread without removing it from tasklists
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*/
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extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
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/* Copy and release all segment info associated with a VM */
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extern void copy_segments(struct task_struct *p, struct mm_struct * mm);
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extern void release_segments(struct mm_struct * mm);
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extern unsigned long thread_saved_pc(struct task_struct *);
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/* Copy and release all segment info associated with a VM */
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#define copy_segments(p, mm) do { } while (0)
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#define release_segments(mm) do { } while (0)
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unsigned long get_wchan(struct task_struct *p);
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#define KSTK_EIP(tsk) ((tsk)->thread.lr)
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#define KSTK_ESP(tsk) ((tsk)->thread.sp)
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#define cpu_relax() barrier()
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#endif /* _ASM_M32R_PROCESSOR_H */
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