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

• Lines: 104
• Date: Tue Jan 20 16:39:43 1998
• Orig file: v2.1.79/linux/include/asm-arm/proc-armv/processor.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.79/linux/include/asm-arm/proc-armv/processor.h linux/include/asm-arm/proc-armv/processor.h
@@ -0,0 +1,103 @@
+/*
+ * linux/include/asm-arm/proc-armv/processor.h
+ *
+ * Copyright (c) 1996 Russell King.
+ *
+ * Changelog:
+ *  20-09-1996	RMK	Created
+ *  26-09-1996	RMK	Added 'EXTRA_THREAD_STRUCT*'
+ *  28-09-1996	RMK	Moved start_thread into the processor dependencies
+ */
+#ifndef __ASM_PROC_PROCESSOR_H
+#define __ASM_PROC_PROCESSOR_H
+
+#ifdef __KERNEL__
+ 
+#define KERNEL_STACK_SIZE	PAGE_SIZE
+
+/*
+ * 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 cpsr;
+	unsigned long r4;
+	unsigned long r5;
+	unsigned long r6;
+	unsigned long r7;
+	unsigned long r8;
+	unsigned long r9;
+	unsigned long fp;
+	unsigned long pc;
+};
+
+#define EXTRA_THREAD_STRUCT				\
+	struct context_save_struct *save;		\
+	unsigned long memmap;
+
+#define EXTRA_THREAD_STRUCT_INIT			\
+	0,						\
+	((unsigned long) swapper_pg_dir) - PAGE_OFFSET
+
+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;
+	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->cpsr = SVC_MODE;
+	save->r4 =
+	save->r5 =
+	save->r6 =
+	save->r7 =
+	save->r8 =
+	save->r9 =
+	save->fp = 0;
+	save->pc = (unsigned long) ret_from_sys_call;
+}
+
+#define start_thread(regs,pc,sp)					\
+({									\
+	unsigned long *stack = (unsigned long *)sp;			\
+	set_fs(USER_DS);						\
+	memzero(regs->uregs, sizeof(regs->uregs));			\
+	regs->ARM_cpsr = sp <= 0x04000000 ? USR26_MODE : USR_MODE;	\
+	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) */			\
+})
+
+/* Allocation and freeing of basic task resources. */
+/*
+ * NOTE! The task struct and the stack go together
+ */
+#define alloc_task_struct() \
+	((struct task_struct *) __get_free_pages(GFP_KERNEL,1,0))
+#define free_task_struct(p)	free_pages((unsigned long)(p),1)
+
+#endif
+
+#endif