patch-2.1.80 linux/include/asm-arm/proc-armo/processor.h

• Lines: 119
• Date: Tue Jan 20 16:39:42 1998
• Orig file: v2.1.79/linux/include/asm-arm/proc-armo/processor.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.79/linux/include/asm-arm/proc-armo/processor.h linux/include/asm-arm/proc-armo/processor.h
@@ -0,0 +1,118 @@
+/*
+ * linux/include/asm-arm/proc-armo/processor.h
+ *
+ * Copyright (c) 1996 Russell King.
+ *
+ * Changelog:
+ *  27-06-1996	RMK	Created
+ *  10-10-1996	RMK	Brought up to date with SA110
+ *  26-09-1996	RMK	Added 'EXTRA_THREAD_STRUCT*'
+ *  28-09-1996	RMK	Moved start_thread into the processor dependencies
+ *  11-01-1998	RMK	Added new uaccess_t
+ */
+#ifndef __ASM_PROC_PROCESSOR_H
+#define __ASM_PROC_PROCESSOR_H
+
+#ifdef __KERNEL__
+
+#include <asm/assembler.h>
+#include <linux/string.h>
+
+#define KERNEL_STACK_SIZE 4096
+
+/*
+ * on arm2,3 wp does not work
+ */
+#define wp_works_ok 0
+#define wp_works_ok__is_a_macro /* for versions in ksyms.c */
+
+struct context_save_struct {
+	unsigned long r4;
+	unsigned long r5;
+	unsigned long r6;
+	unsigned long r7;
+	unsigned long r8;
+	unsigned long r9;
+	unsigned long fp;
+	unsigned long pc;
+};
+
+typedef struct {
+	void (*put_byte)(void);			/* Special calling convention */
+	void (*get_byte)(void);			/* Special calling convention */
+	void (*put_half)(void);			/* Special calling convention */
+	void (*get_half)(void);			/* Special calling convention */
+	void (*put_word)(void);			/* Special calling convention */
+	void (*get_word)(void);			/* Special calling convention */
+	unsigned long (*copy_from_user)(void *to, const void *from, unsigned long sz);
+	unsigned long (*copy_to_user)(void *to, const void *from, unsigned long sz);
+	unsigned long (*clear_user)(void *addr, unsigned long sz);
+	unsigned long (*strncpy_from_user)(char *to, const char *from, unsigned long sz);
+	unsigned long (*strlen_user)(const char *s);
+} uaccess_t;
+
+extern uaccess_t uaccess_user, uaccess_kernel;
+
+#define EXTRA_THREAD_STRUCT							\
+	uaccess_t	*uaccess;		/* User access functions*/	\
+	struct context_save_struct *save;					\
+	unsigned long	memmap;							\
+	unsigned long	memcmap[256];
+
+#define EXTRA_THREAD_STRUCT_INIT		\
+	&uaccess_kernel,			\
+	0,					\
+	(unsigned long) swapper_pg_dir,		\
+	{ 0, }
+
+DECLARE_THREAD_STRUCT;
+
+/*
+ * Return saved PC of a blocked thread.
+ */
+extern __inline__ unsigned long thread_saved_pc (struct thread_struct *t)
+{
+	if (t->save)
+		return t->save->pc & ~PCMASK;
+	else
+		return 0;
+}
+
+extern __inline__ unsigned long get_css_fp (struct thread_struct *t)
+{
+	if (t->save)
+		return t->save->fp;
+	else
+		return 0;
+}
+
+asmlinkage void ret_from_sys_call(void) __asm__("ret_from_sys_call");
+
+extern __inline__ void copy_thread_css (struct context_save_struct *save)
+{
+	save->r4 =
+	save->r5 =
+	save->r6 =
+	save->r7 =
+	save->r8 =
+	save->r9 =
+	save->fp = 0;
+	save->pc = ((unsigned long)ret_from_sys_call) | SVC26_MODE;
+}
+
+#define start_thread(regs,pc,sp)					\
+({									\
+	unsigned long *stack = (unsigned long *)sp;			\
+	set_fs(USER_DS);						\
+	memzero(regs->uregs, sizeof (regs->uregs));			\
+	regs->ARM_pc = pc;		/* pc */			\
+	regs->ARM_sp = sp;		/* sp */			\
+	regs->ARM_r2 = stack[2];	/* r2 (envp) */			\
+	regs->ARM_r1 = stack[1];	/* r1 (argv) */			\
+	regs->ARM_r0 = stack[0];	/* r0 (argc) */			\
+	flush_tlb_mm(current->mm);					\
+})
+
+#endif
+
+#endif