1 files changed, 60 insertions, 0 deletions

diff --git a/include/asm-cris/arch-v32/processor.h b/include/asm-cris/arch-v32/processor.h
new file mode 100644
index 000000000000..8c939bf27987
--- /dev/null
+++ b/include/asm-cris/arch-v32/processor.h
@@ -0,0 +1,60 @@
+#ifndef _ASM_CRIS_ARCH_PROCESSOR_H
+#define _ASM_CRIS_ARCH_PROCESSOR_H
+
+#include <linux/config.h>
+
+/* Return current instruction pointer. */
+#define current_text_addr() \
+        ({void *pc; __asm__ __volatile__ ("lapcq .,%0" : "=rm" (pc)); pc;})
+
+/*
+ * Since CRIS doesn't do hardware task-switching this hasn't really anything to
+ * do with the proccessor itself, it's just here for legacy reasons. This is
+ * used when task-switching using _resume defined in entry.S. The offsets here
+ * are hardcoded into _resume, so if this struct is changed, entry.S needs to be
+ * changed as well.
+ */
+struct thread_struct {
+        unsigned long ksp;      /* Kernel stack pointer. */
+        unsigned long usp;      /* User stack pointer. */
+        unsigned long ccs;      /* Saved flags register. */
+};
+
+/*
+ * User-space process size. This is hardcoded into a few places, so don't
+ * changed it unless everything's clear!
+ */
+#ifndef CONFIG_ETRAXFS_SIM
+#define TASK_SIZE       (0xB0000000UL)
+#else
+#define TASK_SIZE       (0xA0000000UL)
+#endif
+
+/* CCS I=1, enable interrupts. */
+#define INIT_THREAD { 0, 0, (1 << I_CCS_BITNR) }
+
+#define KSTK_EIP(tsk)           \
+({                              \
+        unsigned long eip = 0;  \
+        unsigned long regs = (unsigned long)user_regs(tsk); \
+        if (regs > PAGE_SIZE && virt_addr_valid(regs))      \
+                eip = ((struct pt_regs *)regs)->erp;        \
+        eip; \
+})
+
+/*
+ * Give the thread a program location, set user-mode and switch user
+ * stackpointer.
+ */
+#define start_thread(regs, ip, usp) \
+do { \
+        set_fs(USER_DS); \
+        regs->erp = ip; \
+        regs->ccs |= 1 << (U_CCS_BITNR + CCS_SHIFT); \
+        wrusp(usp); \
+} while(0)
+
+/* Nothing special to do for v32 when handling a kernel bus fault fixup. */
+#define arch_fixup(regs) {};
+
+#endif /* _ASM_CRIS_ARCH_PROCESSOR_H */