1 files changed, 70 insertions, 0 deletions
diff --git a/arch/cris/include/arch-v10/arch/processor.h b/arch/cris/include/arch-v10/arch/processor.h
new file mode 100644
index 000000000000..cc692c7a0660
--- /dev/null
+++ b/arch/cris/include/arch-v10/arch/processor.h
@@ -0,0 +1,70 @@
+#ifndef __ASM_CRIS_ARCH_PROCESSOR_H
+#define __ASM_CRIS_ARCH_PROCESSOR_H
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+#define current_text_addr() ({void *pc; __asm__ ("move.d $pc,%0" : "=rm" (pc)); pc; })
+
+/* CRIS has no problems with write protection */
+#define wp_works_ok 1
+
+/* CRIS thread_struct. this really has nothing to do with the processor itself, since
+ * CRIS does not do any hardware task-switching, but it's here for legacy reasons.
+ * The thread_struct here is used when task-switching using _resume defined in entry.S.
+ * The offsets here are hardcoded into _resume - if you change this struct, you need to
+ * change them as well!!!
+*/
+
+struct thread_struct {
+	unsigned long ksp;     /* kernel stack pointer */
+	unsigned long usp;     /* user stack pointer */
+	unsigned long dccr;    /* saved flag register */
+};
+
+/*
+ * User space process size. This is hardcoded into a few places,
+ * so don't change it unless you know what you are doing.
+ */
+
+#ifdef CONFIG_CRIS_LOW_MAP
+#define TASK_SIZE       (0x50000000UL)   /* 1.25 GB */
+#else
+#define TASK_SIZE       (0xA0000000UL)   /* 2.56 GB */
+#endif
+
+#define INIT_THREAD  { \
+   0, 0, 0x20 }  /* ccr = int enable, nothing else */
+
+#define KSTK_EIP(tsk)	\
+({			\
+	unsigned long eip = 0;   \
+	unsigned long regs = (unsigned long)task_pt_regs(tsk); \
+	if (regs > PAGE_SIZE && \
+		virt_addr_valid(regs)) \
+	eip = ((struct pt_regs *)regs)->irp; \
+	eip; \
+})
+
+/* give the thread a program location
+ * set user-mode (The 'U' flag (User mode flag) is CCR/DCCR bit 8) 
+ * switch user-stackpointer
+ */
+
+#define start_thread(regs, ip, usp) do { \
+	set_fs(USER_DS);      \
+	regs->irp = ip;       \
+	regs->dccr |= 1 << U_DCCR_BITNR; \
+	wrusp(usp);           \
+} while(0)
+
+/* Called when handling a kernel bus fault fixup.
+ *
+ * After a fixup we do not want to return by restoring the CPU-state
+ * anymore, so switch frame-types (see ptrace.h)
+ */
+#define arch_fixup(regs) \
+   regs->frametype = CRIS_FRAME_NORMAL;
+
+#endif