#include <linux/errno.h>
#include <linux/module.h>
#include <linux/sched.h>
+#include <linux/tick.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/init.h>
#include <linux/completion.h>
#include <linux/kallsyms.h>
+#include <linux/random.h>
-#include <asm/abi.h>
+#include <asm/asm.h>
#include <asm/bootinfo.h>
#include <asm/cpu.h>
#include <asm/dsp.h>
* power and have a low exit latency (ie sit in a loop waiting for somebody to
* say that they'd like to reschedule)
*/
-ATTRIB_NORET void cpu_idle(void)
+void __noreturn cpu_idle(void)
{
/* endless idle loop with no priority at all */
while (1) {
+ tick_nohz_stop_sched_tick();
while (!need_resched()) {
-#ifdef CONFIG_MIPS_MT_SMTC
+#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
extern void smtc_idle_loop_hook(void);
smtc_idle_loop_hook();
-#endif /* CONFIG_MIPS_MT_SMTC */
+#endif
if (cpu_wait)
(*cpu_wait)();
}
+ tick_nohz_restart_sched_tick();
preempt_enable_no_resched();
schedule();
preempt_disable();
}
}
-/*
- * Native o32 and N64 ABI without DSP ASE
- */
-struct mips_abi mips_abi = {
- .do_signal = do_signal,
-#ifdef CONFIG_TRAD_SIGNALS
- .setup_frame = setup_frame,
-#endif
- .setup_rt_frame = setup_rt_frame
-};
-
-#ifdef CONFIG_MIPS32_O32
-/*
- * o32 compatibility on 64-bit kernels, without DSP ASE
- */
-struct mips_abi mips_abi_32 = {
- .do_signal = do_signal32,
- .setup_frame = setup_frame_32,
- .setup_rt_frame = setup_rt_frame_32
-};
-#endif /* CONFIG_MIPS32_O32 */
-
-#ifdef CONFIG_MIPS32_N32
-/*
- * N32 on 64-bit kernels, without DSP ASE
- */
-struct mips_abi mips_abi_n32 = {
- .do_signal = do_signal,
- .setup_rt_frame = setup_rt_frame_n32
-};
-#endif /* CONFIG_MIPS32_N32 */
-
asmlinkage void ret_from_fork(void);
void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp)
unsigned long status;
/* New thread loses kernel privileges. */
- status = regs->cp0_status & ~(ST0_CU0|ST0_CU1|KU_MASK);
+ status = regs->cp0_status & ~(ST0_CU0|ST0_CU1|ST0_FR|KU_MASK);
#ifdef CONFIG_64BIT
- status &= ~ST0_FR;
- status |= (current->thread.mflags & MF_32BIT_REGS) ? 0 : ST0_FR;
+ status |= test_thread_flag(TIF_32BIT_REGS) ? 0 : ST0_FR;
#endif
status |= KU_USER;
regs->cp0_status = status;
*childregs = *regs;
childregs->regs[7] = 0; /* Clear error flag */
-#if defined(CONFIG_BINFMT_IRIX)
- if (current->personality != PER_LINUX) {
- /* Under IRIX things are a little different. */
- childregs->regs[3] = 1;
- regs->regs[3] = 0;
- }
-#endif
childregs->regs[2] = 0; /* Child gets zero as return value */
regs->regs[2] = p->pid;
#endif
}
-int dump_task_regs (struct task_struct *tsk, elf_gregset_t *regs)
+int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
{
elf_dump_regs(*regs, task_pt_regs(tsk));
return 1;
}
-int dump_task_fpu (struct task_struct *t, elf_fpregset_t *fpr)
+int dump_task_fpu(struct task_struct *t, elf_fpregset_t *fpr)
{
memcpy(fpr, &t->thread.fpu, sizeof(current->thread.fpu));
/*
* Create a kernel thread
*/
-ATTRIB_NORET void kernel_thread_helper(void *arg, int (*fn)(void *))
+static void __noreturn kernel_thread_helper(void *arg, int (*fn)(void *))
{
do_exit(fn(arg));
}
regs.cp0_epc = (unsigned long) kernel_thread_helper;
regs.cp0_status = read_c0_status();
#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
- regs.cp0_status &= ~(ST0_KUP | ST0_IEC);
- regs.cp0_status |= ST0_IEP;
+ regs.cp0_status = (regs.cp0_status & ~(ST0_KUP | ST0_IEP | ST0_IEC)) |
+ ((regs.cp0_status & (ST0_KUC | ST0_IEC)) << 2);
#else
regs.cp0_status |= ST0_EXL;
#endif
out:
return pc;
}
+
+/*
+ * Don't forget that the stack pointer must be aligned on a 8 bytes
+ * boundary for 32-bits ABI and 16 bytes for 64-bits ABI.
+ */
+unsigned long arch_align_stack(unsigned long sp)
+{
+ if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
+ sp -= get_random_int() & ~PAGE_MASK;
+
+ return sp & ALMASK;
+}