1 files changed, 140 insertions, 0 deletions
diff --git a/arch/h8300/include/asm/processor.h b/arch/h8300/include/asm/processor.h
new file mode 100644
index 0000000..69e8a34
--- /dev/null
+++ b/arch/h8300/include/asm/processor.h
@@ -0,0 +1,140 @@
+/*
+ * include/asm-h8300/processor.h
+ *
+ * Copyright (C) 2002 Yoshinori Sato
+ *
+ * Based on: linux/asm-m68nommu/processor.h
+ *
+ * Copyright (C) 1995 Hamish Macdonald
+ */
+
+#ifndef __ASM_H8300_PROCESSOR_H
+#define __ASM_H8300_PROCESSOR_H
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+#define current_text_addr() ({ __label__ _l; _l: &&_l;})
+
+#include <linux/compiler.h>
+#include <asm/segment.h>
+#include <asm/fpu.h>
+#include <asm/ptrace.h>
+#include <asm/current.h>
+
+static inline unsigned long rdusp(void) {
+	extern unsigned int	sw_usp;
+	return(sw_usp);
+}
+
+static inline void wrusp(unsigned long usp) {
+	extern unsigned int	sw_usp;
+	sw_usp = usp;
+}
+
+/*
+ * User space process size: 3.75GB. This is hardcoded into a few places,
+ * so don't change it unless you know what you are doing.
+ */
+#define TASK_SIZE	(0xFFFFFFFFUL)
+
+#ifdef __KERNEL__
+#define STACK_TOP	TASK_SIZE
+#define STACK_TOP_MAX	STACK_TOP
+#endif
+
+/*
+ * This decides where the kernel will search for a free chunk of vm
+ * space during mmap's. We won't be using it
+ */
+#define TASK_UNMAPPED_BASE	0
+
+struct thread_struct {
+	unsigned long  ksp;		/* kernel stack pointer */
+	unsigned long  usp;		/* user stack pointer */
+	unsigned long  ccr;		/* saved status register */
+	unsigned long  esp0;            /* points to SR of stack frame */
+	struct {
+		unsigned short *addr;
+		unsigned short inst;
+	} breakinfo;
+};
+
+#define INIT_THREAD  {						\
+	.ksp  = sizeof(init_stack) + (unsigned long)init_stack, \
+	.usp  = 0,						\
+	.ccr  = PS_S,						\
+	.esp0 = 0,						\
+	.breakinfo = {						\
+		.addr = (unsigned short *)-1,			\
+		.inst = 0					\
+	}							\
+}
+
+/*
+ * 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
+ */
+#if defined(__H8300H__)
+#define start_thread(_regs, _pc, _usp)			        \
+do {							        \
+	set_fs(USER_DS);           /* reads from user space */  \
+  	(_regs)->pc = (_pc);				        \
+	(_regs)->ccr = 0x00;	   /* clear all flags */        \
+	(_regs)->er5 = current->mm->start_data;	/* GOT base */  \
+	wrusp((unsigned long)(_usp) - sizeof(unsigned long)*3);	\
+} while(0)
+#endif
+#if defined(__H8300S__)
+#define start_thread(_regs, _pc, _usp)			        \
+do {							        \
+	set_fs(USER_DS);           /* reads from user space */  \
+	(_regs)->pc = (_pc);				        \
+	(_regs)->ccr = 0x00;	   /* clear kernel flag */      \
+	(_regs)->exr = 0x78;       /* enable all interrupts */  \
+	(_regs)->er5 = current->mm->start_data;	/* GOT base */  \
+	/* 14 = space for retaddr(4), vector(4), er0(4) and ext(2) on stack */ \
+	wrusp(((unsigned long)(_usp)) - 14);                    \
+} while(0)
+#endif
+
+/* Forward declaration, a strange C thing */
+struct task_struct;
+
+/* Free all resources held by a thread. */
+static inline void release_thread(struct task_struct *dead_task)
+{
+}
+
+extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
+
+#define prepare_to_copy(tsk)	do { } while (0)
+
+/*
+ * Free current thread data structures etc..
+ */
+static inline void exit_thread(void)
+{
+}
+
+/*
+ * Return saved PC of a blocked thread.
+ */
+unsigned long thread_saved_pc(struct task_struct *tsk);
+unsigned long get_wchan(struct task_struct *p);
+
+#define	KSTK_EIP(tsk)	\
+    ({			\
+	unsigned long eip = 0;	 \
+	if ((tsk)->thread.esp0 > PAGE_SIZE && \
+	    MAP_NR((tsk)->thread.esp0) < max_mapnr) \
+	      eip = ((struct pt_regs *) (tsk)->thread.esp0)->pc; \
+	eip; })
+#define	KSTK_ESP(tsk)	((tsk) == current ? rdusp() : (tsk)->thread.usp)
+
+#define cpu_relax()    barrier()
+
+#endif