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authorwdenk <wdenk>2004-04-18 21:13:41 +0000
committerwdenk <wdenk>2004-04-18 21:13:41 +0000
commit507bbe3e8084a82c20399367801da87db7d14e65 (patch)
tree0660633e2e1caf4b819fd46ed43f83e3e05c5523 /include/asm-microblaze/ptrace.h
parent998eaaecd46ee5f00550e30e606cb5556e0b9345 (diff)
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* Patch by Yasushi Shoji, 07 Apr 2004:
- add support for microblaze processors - add support for AtmarkTechno "suzaku" board
Diffstat (limited to 'include/asm-microblaze/ptrace.h')
-rw-r--r--include/asm-microblaze/ptrace.h116
1 files changed, 116 insertions, 0 deletions
diff --git a/include/asm-microblaze/ptrace.h b/include/asm-microblaze/ptrace.h
new file mode 100644
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+/*
+ * include/asm-microblaze/ptrace.h -- Access to CPU registers
+ *
+ * Copyright (C) 2003 John Williams <jwilliams@itee.uq.edu.au>
+ * Copyright (C) 2001,2002 NEC Corporation
+ * Copyright (C) 2001,2002 Miles Bader <miles@gnu.org>
+ *
+ * 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.
+ *
+ * Written by Miles Bader <miles@gnu.org>
+ * Microblaze port by John Williams
+ */
+
+#ifndef __MICROBLAZE_PTRACE_H__
+#define __MICROBLAZE_PTRACE_H__
+
+
+/* Microblaze general purpose registers with special meanings. */
+#define GPR_ZERO 0 /* constant zero */
+#define GPR_ASM 18 /* reserved for assembler */
+#define GPR_SP 1 /* stack pointer */
+#define GPR_GP 2 /* global data pointer */
+#define GPR_EP 30 /* `element pointer' */
+#define GPR_LP 15 /* link pointer (current return address) */
+
+/* These aren't official names, but they make some code more descriptive. */
+#define GPR_ARG0 5
+#define GPR_ARG1 6
+#define GPR_ARG2 7
+#define GPR_ARG3 8
+#define GPR_ARG4 9
+#define GPR_ARG5 10
+#define GPR_RVAL0 3
+#define GPR_RVAL1 4
+#define GPR_RVAL GPR_RVAL0
+
+#define NUM_GPRS 32
+
+/* `system' registers. */
+/* Note these are old v850 values, microblaze has many fewer */
+#define SR_EIPC 0
+#define SR_EIPSW 1
+#define SR_FEPC 2
+#define SR_FEPSW 3
+#define SR_ECR 4
+#define SR_PSW 5
+#define SR_CTPC 16
+#define SR_CTPSW 17
+#define SR_DBPC 18
+#define SR_DBPSW 19
+#define SR_CTBP 20
+#define SR_DIR 21
+#define SR_ASID 23
+
+
+#ifndef __ASSEMBLY__
+
+typedef unsigned long microblaze_reg_t;
+
+/* How processor state is stored on the stack during a syscall/signal.
+ If you change this structure, change the associated assembly-language
+ macros below too (PT_*)! */
+struct pt_regs
+{
+ /* General purpose registers. */
+ microblaze_reg_t gpr[NUM_GPRS];
+
+ microblaze_reg_t pc; /* program counter */
+ microblaze_reg_t psw; /* program status word */
+
+ microblaze_reg_t kernel_mode; /* 1 if in `kernel mode', 0 if user mode */
+ microblaze_reg_t single_step; /* 1 if in single step mode */
+};
+
+
+#define instruction_pointer(regs) ((regs)->pc)
+#define user_mode(regs) (!(regs)->kernel_mode)
+
+/* When a struct pt_regs is used to save user state for a system call in
+ the kernel, the system call is stored in the space for R0 (since it's
+ never used otherwise, R0 being a constant 0). Non-system-calls
+ simply store 0 there. */
+#define PT_REGS_SYSCALL(regs) (regs)->gpr[0]
+#define PT_REGS_SET_SYSCALL(regs, val) ((regs)->gpr[0] = (val))
+
+#endif /* !__ASSEMBLY__ */
+
+
+/* The number of bytes used to store each register. */
+#define _PT_REG_SIZE 4
+
+/* Offset of a general purpose register in a stuct pt_regs. */
+#define PT_GPR(num) ((num) * _PT_REG_SIZE)
+
+/* Offsets of various special registers & fields in a struct pt_regs. */
+#define NUM_SPECIAL 4
+#define PT_PC ((NUM_GPRS + 0) * _PT_REG_SIZE)
+#define PT_PSW ((NUM_GPRS + 1) * _PT_REG_SIZE)
+#define PT_KERNEL_MODE ((NUM_GPRS + 2) * _PT_REG_SIZE)
+#define PT_SINGLESTEP ((NUM_GPRS + 3) * _PT_REG_SIZE)
+
+#define PT_SYSCALL PT_GPR(0)
+
+/* Size of struct pt_regs, including alignment. */
+#define PT_SIZE ((NUM_GPRS + NUM_SPECIAL) * _PT_REG_SIZE)
+
+/* These are `magic' values for PTRACE_PEEKUSR that return info about where
+ a process is located in memory. */
+#define PT_TEXT_ADDR (PT_SIZE + 1)
+#define PT_TEXT_LEN (PT_SIZE + 2)
+#define PT_DATA_ADDR (PT_SIZE + 3)
+#define PT_DATA_LEN (PT_SIZE + 4)
+
+#endif /* __MICROBLAZE_PTRACE_H__ */