Initial import

1 files changed, 68 insertions, 0 deletions

diff --git a/arch/powerpc/mm/icswx.h b/arch/powerpc/mm/icswx.h
new file mode 100644
index 000000000..6dedc08e6
--- /dev/null
+++ b/arch/powerpc/mm/icswx.h
@@ -0,0 +1,68 @@
+#ifndef _ARCH_POWERPC_MM_ICSWX_H_
+#define _ARCH_POWERPC_MM_ICSWX_H_
+
+/*
+ *  ICSWX and ACOP Management
+ *
+ *  Copyright (C) 2011 Anton Blanchard, IBM Corp. <anton@samba.org>
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version
+ *  2 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <asm/mmu_context.h>
+
+/* also used to denote that PIDs are not used */
+#define COP_PID_NONE 0
+
+static inline void sync_cop(void *arg)
+{
+	struct mm_struct *mm = arg;
+
+	if (mm == current->active_mm)
+		switch_cop(current->active_mm);
+}
+
+#ifdef CONFIG_PPC_ICSWX_PID
+extern int get_cop_pid(struct mm_struct *mm);
+extern int disable_cop_pid(struct mm_struct *mm);
+extern void free_cop_pid(int free_pid);
+#else
+#define get_cop_pid(m) (COP_PID_NONE)
+#define disable_cop_pid(m) (COP_PID_NONE)
+#define free_cop_pid(p)
+#endif
+
+/*
+ * These are implementation bits for architected registers.  If this
+ * ever becomes architecture the should be moved to reg.h et. al.
+ */
+/* UCT is the same bit for Server and Embedded */
+#define ICSWX_DSI_UCT		0x00004000  /* Unavailable Coprocessor Type */
+
+#ifdef CONFIG_PPC_BOOK3E
+/* Embedded implementation gives us no hints as to what the CT is */
+#define ICSWX_GET_CT_HINT(x) (-1)
+#else
+/* Server implementation contains the CT value in the DSISR */
+#define ICSWX_DSISR_CTMASK	0x00003f00
+#define ICSWX_GET_CT_HINT(x)	(((x) & ICSWX_DSISR_CTMASK) >> 8)
+#endif
+
+#define ICSWX_RC_STARTED	0x8	/* The request has been started */
+#define ICSWX_RC_NOT_IDLE	0x4	/* No coprocessor found idle */
+#define ICSWX_RC_NOT_FOUND	0x2	/* No coprocessor found */
+#define ICSWX_RC_UNDEFINED	0x1	/* Reserved */
+
+extern int acop_handle_fault(struct pt_regs *regs, unsigned long address,
+			     unsigned long error_code);
+
+static inline u64 acop_copro_type_bit(unsigned int type)
+{
+	return 1ULL << (63 - type);
+}
+
+#endif /* !_ARCH_POWERPC_MM_ICSWX_H_ */