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1da177e4 LT |
1 | #ifndef _ASM_M32R_PROCESSOR_H |
2 | #define _ASM_M32R_PROCESSOR_H | |
3 | ||
4 | /* | |
5 | * include/asm-m32r/processor.h | |
6 | * | |
7 | * This file is subject to the terms and conditions of the GNU General Public | |
8 | * License. See the file "COPYING" in the main directory of this archive | |
9 | * for more details. | |
10 | * | |
11 | * Copyright (C) 1994 Linus Torvalds | |
12 | * Copyright (C) 2001 Hiroyuki Kondo, Hirokazu Takata, and Hitoshi Yamamoto | |
13 | * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org> | |
14 | */ | |
15 | ||
16 | #include <linux/kernel.h> | |
1da177e4 LT |
17 | #include <asm/cache.h> |
18 | #include <asm/ptrace.h> /* pt_regs */ | |
19 | ||
20 | /* | |
21 | * Default implementation of macro that returns current | |
22 | * instruction pointer ("program counter"). | |
23 | */ | |
24 | #define current_text_addr() ({ __label__ _l; _l: &&_l; }) | |
25 | ||
26 | /* | |
27 | * CPU type and hardware bug flags. Kept separately for each CPU. | |
28 | * Members of this structure are referenced in head.S, so think twice | |
29 | * before touching them. [mj] | |
30 | */ | |
31 | ||
32 | struct cpuinfo_m32r { | |
33 | unsigned long pgtable_cache_sz; | |
34 | unsigned long cpu_clock; | |
35 | unsigned long bus_clock; | |
36 | unsigned long timer_divide; | |
37 | unsigned long loops_per_jiffy; | |
38 | }; | |
39 | ||
40 | /* | |
41 | * capabilities of CPUs | |
42 | */ | |
43 | ||
44 | extern struct cpuinfo_m32r boot_cpu_data; | |
45 | ||
46 | #ifdef CONFIG_SMP | |
47 | extern struct cpuinfo_m32r cpu_data[]; | |
48 | #define current_cpu_data cpu_data[smp_processor_id()] | |
49 | #else | |
50 | #define cpu_data (&boot_cpu_data) | |
51 | #define current_cpu_data boot_cpu_data | |
52 | #endif | |
53 | ||
54 | /* | |
55 | * User space process size: 2GB (default). | |
56 | */ | |
57 | #ifdef CONFIG_MMU | |
58 | #define TASK_SIZE (0x80000000UL) | |
59 | #else | |
60 | #define TASK_SIZE (0x00400000UL) | |
61 | #endif | |
62 | ||
922a70d3 DH |
63 | #ifdef __KERNEL__ |
64 | #define STACK_TOP TASK_SIZE | |
65 | #define STACK_TOP_MAX STACK_TOP | |
66 | #endif | |
67 | ||
1da177e4 LT |
68 | /* This decides where the kernel will search for a free chunk of vm |
69 | * space during mmap's. | |
70 | */ | |
71 | #define TASK_UNMAPPED_BASE PAGE_ALIGN(TASK_SIZE / 3) | |
72 | ||
73 | typedef struct { | |
74 | unsigned long seg; | |
75 | } mm_segment_t; | |
76 | ||
77 | #define MAX_TRAPS 10 | |
78 | ||
79 | struct debug_trap { | |
80 | int nr_trap; | |
81 | unsigned long addr[MAX_TRAPS]; | |
82 | unsigned long insn[MAX_TRAPS]; | |
83 | }; | |
84 | ||
85 | struct thread_struct { | |
86 | unsigned long address; | |
87 | unsigned long trap_no; /* Trap number */ | |
88 | unsigned long error_code; /* Error code of trap */ | |
89 | unsigned long lr; /* saved pc */ | |
90 | unsigned long sp; /* user stack pointer */ | |
91 | struct debug_trap debug_trap; | |
92 | }; | |
93 | ||
94 | #define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack) | |
95 | ||
96 | #define INIT_THREAD { \ | |
97 | .sp = INIT_SP, \ | |
98 | } | |
99 | ||
100 | /* | |
101 | * Do necessary setup to start up a newly executed thread. | |
102 | */ | |
103 | ||
104 | /* User process Backup PSW */ | |
105 | #define USERPS_BPSW (M32R_PSW_BSM|M32R_PSW_BIE|M32R_PSW_BPM) | |
106 | ||
107 | #define start_thread(regs, new_pc, new_spu) \ | |
108 | do { \ | |
109 | set_fs(USER_DS); \ | |
110 | regs->psw = (regs->psw | USERPS_BPSW) & 0x0000FFFFUL; \ | |
111 | regs->bpc = new_pc; \ | |
112 | regs->spu = new_spu; \ | |
113 | } while (0) | |
114 | ||
115 | /* Forward declaration, a strange C thing */ | |
116 | struct task_struct; | |
117 | struct mm_struct; | |
118 | ||
119 | /* Free all resources held by a thread. */ | |
120 | extern void release_thread(struct task_struct *); | |
121 | ||
122 | #define prepare_to_copy(tsk) do { } while (0) | |
123 | ||
124 | /* | |
125 | * create a kernel thread without removing it from tasklists | |
126 | */ | |
127 | extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); | |
128 | ||
129 | /* Copy and release all segment info associated with a VM */ | |
130 | extern void copy_segments(struct task_struct *p, struct mm_struct * mm); | |
131 | extern void release_segments(struct mm_struct * mm); | |
132 | ||
133 | extern unsigned long thread_saved_pc(struct task_struct *); | |
134 | ||
135 | /* Copy and release all segment info associated with a VM */ | |
136 | #define copy_segments(p, mm) do { } while (0) | |
137 | #define release_segments(mm) do { } while (0) | |
138 | ||
139 | unsigned long get_wchan(struct task_struct *p); | |
140 | #define KSTK_EIP(tsk) ((tsk)->thread.lr) | |
141 | #define KSTK_ESP(tsk) ((tsk)->thread.sp) | |
142 | ||
143 | #define THREAD_SIZE (2*PAGE_SIZE) | |
144 | ||
145 | #define cpu_relax() barrier() | |
146 | ||
147 | #endif /* _ASM_M32R_PROCESSOR_H */ |