/*
- * include/asm-m68k/processor.h
+ * include/asm-m68knommu/processor.h
*
* Copyright (C) 1995 Hamish Macdonald
*/
*/
#define current_text_addr() ({ __label__ _l; _l: &&_l;})
+#include <linux/compiler.h>
#include <linux/threads.h>
#include <asm/types.h>
#include <asm/segment.h>
{0, 0}, 0, {0,}, {0, 0, 0}, {0,}, \
}
+/*
+ * Coldfire stacks need to be re-aligned on trap exit, conventional
+ * 68k can handle this case cleanly.
+ */
+#if defined(CONFIG_COLDFIRE)
+#define reformat(_regs) do { (_regs)->format = 0x4; } while(0)
+#else
+#define reformat(_regs) do { } while (0)
+#endif
+
/*
* Do necessary setup to start up a newly executed thread.
*
* pass the data segment into user programs if it exists,
* it can't hurt anything as far as I can tell
*/
-#define start_thread(_regs, _pc, _usp) \
-do { \
- set_fs(USER_DS); /* reads from user space */ \
- (_regs)->pc = (_pc); \
- if (current->mm) \
- (_regs)->d5 = current->mm->start_data; \
- (_regs)->sr &= ~0x2000; \
- wrusp(_usp); \
+#define start_thread(_regs, _pc, _usp) \
+do { \
+ set_fs(USER_DS); /* reads from user space */ \
+ (_regs)->pc = (_pc); \
+ ((struct switch_stack *)(_regs))[-1].a6 = 0; \
+ reformat(_regs); \
+ if (current->mm) \
+ (_regs)->d5 = current->mm->start_data; \
+ (_regs)->sr &= ~0x2000; \
+ wrusp(_usp); \
} while(0)
/* Forward declaration, a strange C thing */
eip; })
#define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp)
-#define cpu_relax() do { } while (0)
+#define cpu_relax() barrier()
#endif