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