1 /*
2 * linux/arch/unicore32/include/asm/processor.h
3 *
4 * Code specific to PKUnity SoC and UniCore ISA
5 *
6 * Copyright (C) 2001-2010 GUAN Xue-tao
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13 #ifndef __UNICORE_PROCESSOR_H__
14 #define __UNICORE_PROCESSOR_H__
15
16 /*
17 * Default implementation of macro that returns current
18 * instruction pointer ("program counter").
19 */
20 #define current_text_addr() ({ __label__ _l; _l: &&_l; })
21
22 #ifdef __KERNEL__
23
24 #include <asm/ptrace.h>
25 #include <asm/types.h>
26
27 #ifdef __KERNEL__
28 #define STACK_TOP TASK_SIZE
29 #define STACK_TOP_MAX TASK_SIZE
30 #endif
31
32 struct debug_entry {
33 u32 address;
34 u32 insn;
35 };
36
37 struct debug_info {
38 int nsaved;
39 struct debug_entry bp[2];
40 };
41
42 struct thread_struct {
43 /* fault info */
44 unsigned long address;
45 unsigned long trap_no;
46 unsigned long error_code;
47 /* debugging */
48 struct debug_info debug;
49 };
50
51 #define INIT_THREAD { }
52
53 #define start_thread(regs, pc, sp) \
54 ({ \
55 unsigned long *stack = (unsigned long *)sp; \
56 memset(regs->uregs, 0, sizeof(regs->uregs)); \
57 regs->UCreg_asr = USER_MODE; \
58 regs->UCreg_pc = pc & ~1; /* pc */ \
59 regs->UCreg_sp = sp; /* sp */ \
60 regs->UCreg_02 = stack[2]; /* r2 (envp) */ \
61 regs->UCreg_01 = stack[1]; /* r1 (argv) */ \
62 regs->UCreg_00 = stack[0]; /* r0 (argc) */ \
63 })
64
65 /* Forward declaration, a strange C thing */
66 struct task_struct;
67
68 /* Free all resources held by a thread. */
69 extern void release_thread(struct task_struct *);
70
71 unsigned long get_wchan(struct task_struct *p);
72
73 #define cpu_relax() barrier()
74
75 #define task_pt_regs(p) \
76 ((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1)
77
78 #define KSTK_EIP(tsk) (task_pt_regs(tsk)->UCreg_pc)
79 #define KSTK_ESP(tsk) (task_pt_regs(tsk)->UCreg_sp)
80
81 #endif
82
83 #endif /* __UNICORE_PROCESSOR_H__ */
84
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