-/* thread_info.h: i386 low-level thread information
+#ifndef _ASM_M32R_THREAD_INFO_H
+#define _ASM_M32R_THREAD_INFO_H
+
+/* thread_info.h: m32r low-level thread information
*
* Copyright (C) 2002 David Howells (dhowells@redhat.com)
* - Incorporating suggestions made by Linus Torvalds and Dave Miller
+ * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org>
*/
-#ifndef _ASM_THREAD_INFO_H
-#define _ASM_THREAD_INFO_H
-
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
unsigned long flags; /* low level flags */
unsigned long status; /* thread-synchronous flags */
__u32 cpu; /* current CPU */
- __s32 preempt_count; /* 0 => preemptable, <0 => BUG */
+ int preempt_count; /* 0 => preemptable, <0 => BUG */
mm_segment_t addr_limit; /* thread address space:
- 0-0xBFFFFFFF for user-thead
+ 0-0xBFFFFFFF for user-thread
0-0xFFFFFFFF for kernel-thread
*/
struct restart_block restart_block;
#endif
-#define PREEMPT_ACTIVE 0x4000000
+#define PREEMPT_ACTIVE 0x10000000
/*
* macros/functions for gaining access to the thread information structure
#define init_thread_info (init_thread_union.thread_info)
#define init_stack (init_thread_union.stack)
+#define THREAD_SIZE (2*PAGE_SIZE)
+
/* how to get the thread information struct from C */
static inline struct thread_info *current_thread_info(void)
{
struct thread_info *ti;
__asm__ __volatile__ (
- "ldi %0, #0xffffe000; \n\t"
- "and %0, sp; \n\t"
- : "=r" (ti)
+ "ldi %0, #%1 \n\t"
+ "and %0, sp \n\t"
+ : "=r" (ti) : "i" (~(THREAD_SIZE - 1))
);
return ti;
}
/* thread information allocation */
-#define THREAD_SIZE (2*PAGE_SIZE)
-#define alloc_thread_info(task) \
- ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
-#define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
-#define get_thread_info(ti) get_task_struct((ti)->task)
-#define put_thread_info(ti) put_task_struct((ti)->task)
+#ifdef CONFIG_DEBUG_STACK_USAGE
+#define alloc_thread_info(tsk) \
+ ({ \
+ struct thread_info *ret; \
+ \
+ ret = kmalloc(THREAD_SIZE, GFP_KERNEL); \
+ if (ret) \
+ memset(ret, 0, THREAD_SIZE); \
+ ret; \
+ })
+#else
+#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
+#endif
+
+#define free_thread_info(info) kfree(info)
+
+#define TI_FLAG_FAULT_CODE_SHIFT 28
+
+static inline void set_thread_fault_code(unsigned int val)
+{
+ struct thread_info *ti = current_thread_info();
+ ti->flags = (ti->flags & (~0 >> (32 - TI_FLAG_FAULT_CODE_SHIFT)))
+ | (val << TI_FLAG_FAULT_CODE_SHIFT);
+}
+
+static inline unsigned int get_thread_fault_code(void)
+{
+ struct thread_info *ti = current_thread_info();
+ return ti->flags >> TI_FLAG_FAULT_CODE_SHIFT;
+}
#else /* !__ASSEMBLY__ */
+#define THREAD_SIZE 8192
+
/* how to get the thread information struct from ASM */
#define GET_THREAD_INFO(reg) GET_THREAD_INFO reg
.macro GET_THREAD_INFO reg
- ldi \reg, #0xffffe000
+ ldi \reg, #-THREAD_SIZE
and \reg, sp
.endm
#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
#define TIF_IRET 5 /* return with iret */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
+ /* 31..28 fault code */
+#define TIF_MEMDIE 17
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#endif /* __KERNEL__ */
-#endif /* _ASM_THREAD_INFO_H */
+#endif /* _ASM_M32R_THREAD_INFO_H */