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ARC: make start_thread() out-of-line
Helps move out ISA specific bits from a arch exported header Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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2 changed files with 27 additions and 25 deletions
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@ -18,7 +18,6 @@
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#ifndef __ASSEMBLY__
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#include <asm/arcregs.h> /* for STATUS_E1_MASK et all */
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#include <asm/ptrace.h>
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/* Arch specific stuff which needs to be saved per task.
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@ -41,15 +40,13 @@ struct thread_struct {
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/* Forward declaration, a strange C thing */
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struct task_struct;
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/*
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* Return saved PC of a blocked thread.
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*/
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/* Return saved PC of a blocked thread */
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unsigned long thread_saved_pc(struct task_struct *t);
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#define task_pt_regs(p) \
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((struct pt_regs *)(THREAD_SIZE + (void *)task_stack_page(p)) - 1)
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/* Free all resources held by a thread. */
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/* Free all resources held by a thread */
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#define release_thread(thread) do { } while (0)
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/* Prepare to copy thread state - unlazy all lazy status */
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@ -82,26 +79,8 @@ unsigned long thread_saved_pc(struct task_struct *t);
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#define KSTK_BLINK(tsk) KSTK_REG(tsk, 4)
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#define KSTK_FP(tsk) KSTK_REG(tsk, 0)
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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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* E1,E2 so that Interrupts are enabled in user mode
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* L set, so Loop inhibited to begin with
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* lp_start and lp_end seeded with bogus non-zero values so to easily catch
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* the ARC700 sr to lp_start hardware bug
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*/
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#define start_thread(_regs, _pc, _usp) \
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do { \
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set_fs(USER_DS); /* reads from user space */ \
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(_regs)->ret = (_pc); \
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/* Interrupts enabled in User Mode */ \
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(_regs)->status32 = STATUS_U_MASK | STATUS_L_MASK \
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| STATUS_E1_MASK | STATUS_E2_MASK; \
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(_regs)->sp = (_usp); \
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/* bogus seed values for debugging */ \
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(_regs)->lp_start = 0x10; \
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(_regs)->lp_end = 0x80; \
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} while (0)
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extern void start_thread(struct pt_regs * regs, unsigned long pc,
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unsigned long usp);
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extern unsigned int get_wchan(struct task_struct *p);
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@ -150,6 +150,29 @@ int copy_thread(unsigned long clone_flags,
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return 0;
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}
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/*
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* Do necessary setup to start up a new user task
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*/
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void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long usp)
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{
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set_fs(USER_DS); /* user space */
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regs->sp = usp;
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regs->ret = pc;
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/*
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* [U]ser Mode bit set
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* [L] ZOL loop inhibited to begin with - cleared by a LP insn
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* Interrupts enabled
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*/
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regs->status32 = STATUS_U_MASK | STATUS_L_MASK |
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STATUS_E1_MASK | STATUS_E2_MASK;
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/* bogus seed values for debugging */
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regs->lp_start = 0x10;
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regs->lp_end = 0x80;
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}
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/*
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* Some archs flush debug and FPU info here
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*/
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