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>
105 lines
2.5 KiB
C
105 lines
2.5 KiB
C
#ifndef _ASM_SCORE_PROCESSOR_H
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#define _ASM_SCORE_PROCESSOR_H
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#include <linux/cpumask.h>
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#include <linux/threads.h>
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#include <asm/segment.h>
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struct task_struct;
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/*
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* System setup and hardware flags..
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*/
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extern void (*cpu_wait)(void);
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extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
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extern unsigned long thread_saved_pc(struct task_struct *tsk);
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extern void start_thread(struct pt_regs *regs,
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unsigned long pc, unsigned long sp);
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extern unsigned long get_wchan(struct task_struct *p);
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/*
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* Return current * instruction pointer ("program counter").
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*/
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#define current_text_addr() ({ __label__ _l; _l: &&_l; })
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#define cpu_relax() barrier()
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#define release_thread(thread) do {} while (0)
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/*
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* User space process size: 2GB. This is hardcoded into a few places,
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* so don't change it unless you know what you are doing.
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*/
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#define TASK_SIZE 0x7fff8000UL
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/*
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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 ((TASK_SIZE / 3) & ~(PAGE_SIZE))
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#ifdef __KERNEL__
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#define STACK_TOP TASK_SIZE
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#define STACK_TOP_MAX TASK_SIZE
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#endif
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/*
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* If you change thread_struct remember to change the #defines below too!
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*/
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struct thread_struct {
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unsigned long reg0, reg2, reg3;
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unsigned long reg12, reg13, reg14, reg15, reg16;
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unsigned long reg17, reg18, reg19, reg20, reg21;
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unsigned long cp0_psr;
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unsigned long cp0_ema; /* Last user fault */
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unsigned long cp0_badvaddr; /* Last user fault */
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unsigned long cp0_baduaddr; /* Last kernel fault accessing USEG */
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unsigned long error_code;
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unsigned long trap_no;
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unsigned long mflags;
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unsigned long reg29;
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unsigned long single_step;
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unsigned long ss_nextcnt;
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unsigned long insn1_type;
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unsigned long addr1;
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unsigned long insn1;
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unsigned long insn2_type;
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unsigned long addr2;
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unsigned long insn2;
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mm_segment_t current_ds;
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};
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#define INIT_THREAD { \
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.reg0 = 0, \
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.reg2 = 0, \
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.reg3 = 0, \
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.reg12 = 0, \
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.reg13 = 0, \
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.reg14 = 0, \
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.reg15 = 0, \
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.reg16 = 0, \
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.reg17 = 0, \
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.reg18 = 0, \
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.reg19 = 0, \
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.reg20 = 0, \
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.reg21 = 0, \
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.cp0_psr = 0, \
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.error_code = 0, \
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.trap_no = 0, \
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}
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#define kstk_tos(tsk) \
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((unsigned long)task_stack_page(tsk) + THREAD_SIZE - 32)
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#define task_pt_regs(tsk) ((struct pt_regs *)kstk_tos(tsk) - 1)
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#define KSTK_EIP(tsk) (task_pt_regs(tsk)->cp0_epc)
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#define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[29])
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#endif /* _ASM_SCORE_PROCESSOR_H */
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