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Diffstat (limited to 'arch/m68k/include/asm/processor.h')
-rw-r--r--arch/m68k/include/asm/processor.h31
1 files changed, 28 insertions, 3 deletions
diff --git a/arch/m68k/include/asm/processor.h b/arch/m68k/include/asm/processor.h
index 3750819ac5a1..f4d82c619a5c 100644
--- a/arch/m68k/include/asm/processor.h
+++ b/arch/m68k/include/asm/processor.h
@@ -9,7 +9,6 @@
#define __ASM_M68K_PROCESSOR_H
#include <linux/thread_info.h>
-#include <asm/segment.h>
#include <asm/fpu.h>
#include <asm/ptrace.h>
@@ -75,11 +74,37 @@ static inline void wrusp(unsigned long usp)
#define TASK_UNMAPPED_BASE 0
#endif
+/* Address spaces (or Function Codes in Motorola lingo) */
+#define USER_DATA 1
+#define USER_PROGRAM 2
+#define SUPER_DATA 5
+#define SUPER_PROGRAM 6
+#define CPU_SPACE 7
+
+#ifdef CONFIG_CPU_HAS_ADDRESS_SPACES
+/*
+ * Set the SFC/DFC registers for special MM operations. For most normal
+ * operation these remain set to USER_DATA for the uaccess routines.
+ */
+static inline void set_fc(unsigned long val)
+{
+ WARN_ON_ONCE(in_interrupt());
+
+ __asm__ __volatile__ ("movec %0,%/sfc\n\t"
+ "movec %0,%/dfc\n\t"
+ : /* no outputs */ : "r" (val) : "memory");
+}
+#else
+static inline void set_fc(unsigned long val)
+{
+}
+#endif /* CONFIG_CPU_HAS_ADDRESS_SPACES */
+
struct thread_struct {
unsigned long ksp; /* kernel stack pointer */
unsigned long usp; /* user stack pointer */
unsigned short sr; /* saved status register */
- unsigned short fs; /* saved fs (sfc, dfc) */
+ unsigned short fc; /* saved fc (sfc, dfc) */
unsigned long crp[2]; /* cpu root pointer */
unsigned long esp0; /* points to SR of stack frame */
unsigned long faddr; /* info about last fault */
@@ -92,7 +117,7 @@ struct thread_struct {
#define INIT_THREAD { \
.ksp = sizeof(init_stack) + (unsigned long) init_stack, \
.sr = PS_S, \
- .fs = __KERNEL_DS, \
+ .fc = USER_DATA, \
}
/*