MIPS: sync processor and register definitions with linux-4.4

Update definitions for processor, registers as well as assemby
macros.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

1 files changed, 59 insertions, 40 deletions

diff --git a/arch/mips/include/asm/ptrace.h b/arch/mips/include/asm/ptrace.h
index 5659c0c873..da051f6e10 100644
--- a/arch/mips/include/asm/ptrace.h
+++ b/arch/mips/include/asm/ptrace.h
@@ -1,35 +1,27 @@
 /*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
  * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000 by Ralf Baechle
  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0
  */
 #ifndef _ASM_PTRACE_H
 #define _ASM_PTRACE_H
 
-/* 0 - 31 are integer registers, 32 - 63 are fp registers.  */
-#define FPR_BASE	32
-#define PC		64
-#define CAUSE		65
-#define BADVADDR	66
-#define MMHI		67
-#define MMLO		68
-#define FPC_CSR		69
-#define FPC_EIR		70
-#define DSP_BASE	71		/* 3 more hi / lo register pairs */
-#define DSP_CONTROL	77
-#define ACX		78
+#include <linux/compiler.h>
+#include <linux/types.h>
+#include <asm/isadep.h>
 
 /*
  * This struct defines the way the registers are stored on the stack during a
  * system call/exception. As usual the registers k0/k1 aren't being saved.
+ *
+ * If you add a register here, also add it to regoffset_table[] in
+ * arch/mips/kernel/ptrace.c.
  */
 struct pt_regs {
 #ifdef CONFIG_32BIT
 	/* Pad bytes for argument save space on the stack. */
-	unsigned long pad0[6];
+	unsigned long pad0[8];
 #endif
 
 	/* Saved main processor registers. */
@@ -45,34 +37,50 @@ struct pt_regs {
 	unsigned long cp0_badvaddr;
 	unsigned long cp0_cause;
 	unsigned long cp0_epc;
-#ifdef CONFIG_MIPS_MT_SMTC
-	unsigned long cp0_tcstatus;
-#endif /* CONFIG_MIPS_MT_SMTC */
-} __attribute__ ((aligned (8)));
+#ifdef CONFIG_CPU_CAVIUM_OCTEON
+	unsigned long long mpl[6];        /* MTM{0-5} */
+	unsigned long long mtp[6];        /* MTP{0-5} */
+#endif
+	unsigned long __last[0];
+} __aligned(8);
 
-/* Arbitrarily choose the same ptrace numbers as used by the Sparc code. */
-#define PTRACE_GETREGS		12
-#define PTRACE_SETREGS		13
-#define PTRACE_GETFPREGS		14
-#define PTRACE_SETFPREGS		15
-/* #define PTRACE_GETFPXREGS		18 */
-/* #define PTRACE_SETFPXREGS		19 */
+static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
+{
+	return regs->regs[31];
+}
 
-#define PTRACE_OLDSETOPTIONS	21
+/*
+ * Don't use asm-generic/ptrace.h it defines FP accessors that don't make
+ * sense on MIPS.  We rather want an error if they get invoked.
+ */
 
-#define PTRACE_GET_THREAD_AREA	25
-#define PTRACE_SET_THREAD_AREA	26
+static inline void instruction_pointer_set(struct pt_regs *regs,
+						unsigned long val)
+{
+	regs->cp0_epc = val;
+}
 
-/* Calls to trace a 64bit program from a 32bit program.  */
-#define PTRACE_PEEKTEXT_3264	0xc0
-#define PTRACE_PEEKDATA_3264	0xc1
-#define PTRACE_POKETEXT_3264	0xc2
-#define PTRACE_POKEDATA_3264	0xc3
-#define PTRACE_GET_THREAD_AREA_3264	0xc4
+/* Query offset/name of register from its name/offset */
+extern int regs_query_register_offset(const char *name);
+#define MAX_REG_OFFSET (offsetof(struct pt_regs, __last))
 
-#ifdef __KERNEL__
+/**
+ * regs_get_register() - get register value from its offset
+ * @regs:       pt_regs from which register value is gotten.
+ * @offset:     offset number of the register.
+ *
+ * regs_get_register returns the value of a register. The @offset is the
+ * offset of the register in struct pt_regs address which specified by @regs.
+ * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
+ */
+static inline unsigned long regs_get_register(struct pt_regs *regs,
+						unsigned int offset)
+{
+	if (unlikely(offset > MAX_REG_OFFSET))
+		return 0;
 
-#include <asm/isadep.h>
+	return *(unsigned long *)((unsigned long)regs + offset);
+}
 
 /*
  * Does the process account for user or for system time?
@@ -82,6 +90,17 @@ struct pt_regs {
 #define instruction_pointer(regs) ((regs)->cp0_epc)
 #define profile_pc(regs) instruction_pointer(regs)
 
-#endif
+/* Helpers for working with the user stack pointer */
+
+static inline unsigned long user_stack_pointer(struct pt_regs *regs)
+{
+	return regs->regs[29];
+}
+
+static inline void user_stack_pointer_set(struct pt_regs *regs,
+						unsigned long val)
+{
+	regs->regs[29] = val;
+}
 
 #endif /* _ASM_PTRACE_H */