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1 | /* |
2 | * Copyright (C) 2004-2006 Atmel Corporation | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | */ | |
8 | #ifndef __ASM_AVR32_PROCESSOR_H | |
9 | #define __ASM_AVR32_PROCESSOR_H | |
10 | ||
11 | #include <asm/page.h> | |
12 | #include <asm/cache.h> | |
13 | ||
14 | #define TASK_SIZE 0x80000000 | |
15 | ||
16 | #ifndef __ASSEMBLY__ | |
17 | ||
18 | static inline void *current_text_addr(void) | |
19 | { | |
20 | register void *pc asm("pc"); | |
21 | return pc; | |
22 | } | |
23 | ||
24 | enum arch_type { | |
25 | ARCH_AVR32A, | |
26 | ARCH_AVR32B, | |
27 | ARCH_MAX | |
28 | }; | |
29 | ||
30 | enum cpu_type { | |
31 | CPU_MORGAN, | |
32 | CPU_AT32AP, | |
33 | CPU_MAX | |
34 | }; | |
35 | ||
36 | enum tlb_config { | |
37 | TLB_NONE, | |
38 | TLB_SPLIT, | |
39 | TLB_UNIFIED, | |
40 | TLB_INVALID | |
41 | }; | |
42 | ||
43 | struct avr32_cpuinfo { | |
44 | struct clk *clk; | |
45 | unsigned long loops_per_jiffy; | |
46 | enum arch_type arch_type; | |
47 | enum cpu_type cpu_type; | |
48 | unsigned short arch_revision; | |
49 | unsigned short cpu_revision; | |
50 | enum tlb_config tlb_config; | |
51 | ||
52 | struct cache_info icache; | |
53 | struct cache_info dcache; | |
54 | }; | |
55 | ||
56 | extern struct avr32_cpuinfo boot_cpu_data; | |
57 | ||
58 | #ifdef CONFIG_SMP | |
59 | extern struct avr32_cpuinfo cpu_data[]; | |
60 | #define current_cpu_data cpu_data[smp_processor_id()] | |
61 | #else | |
62 | #define cpu_data (&boot_cpu_data) | |
63 | #define current_cpu_data boot_cpu_data | |
64 | #endif | |
65 | ||
66 | /* This decides where the kernel will search for a free chunk of vm | |
67 | * space during mmap's | |
68 | */ | |
69 | #define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3)) | |
70 | ||
71 | #define cpu_relax() barrier() | |
72 | #define cpu_sync_pipeline() asm volatile("sub pc, -2" : : : "memory") | |
73 | ||
74 | struct cpu_context { | |
75 | unsigned long sr; | |
76 | unsigned long pc; | |
77 | unsigned long ksp; /* Kernel stack pointer */ | |
78 | unsigned long r7; | |
79 | unsigned long r6; | |
80 | unsigned long r5; | |
81 | unsigned long r4; | |
82 | unsigned long r3; | |
83 | unsigned long r2; | |
84 | unsigned long r1; | |
85 | unsigned long r0; | |
86 | }; | |
87 | ||
88 | /* This struct contains the CPU context as stored by switch_to() */ | |
89 | struct thread_struct { | |
90 | struct cpu_context cpu_context; | |
91 | unsigned long single_step_addr; | |
92 | u16 single_step_insn; | |
93 | }; | |
94 | ||
95 | #define INIT_THREAD { \ | |
96 | .cpu_context = { \ | |
97 | .ksp = sizeof(init_stack) + (long)&init_stack, \ | |
98 | }, \ | |
99 | } | |
100 | ||
101 | /* | |
102 | * Do necessary setup to start up a newly executed thread. | |
103 | */ | |
104 | #define start_thread(regs, new_pc, new_sp) \ | |
105 | do { \ | |
106 | set_fs(USER_DS); \ | |
107 | memset(regs, 0, sizeof(*regs)); \ | |
108 | regs->sr = MODE_USER; \ | |
109 | regs->pc = new_pc & ~1; \ | |
110 | regs->sp = new_sp; \ | |
111 | } while(0) | |
112 | ||
113 | struct task_struct; | |
114 | ||
115 | /* Free all resources held by a thread */ | |
116 | extern void release_thread(struct task_struct *); | |
117 | ||
118 | /* Create a kernel thread without removing it from tasklists */ | |
119 | extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); | |
120 | ||
121 | /* Prepare to copy thread state - unlazy all lazy status */ | |
122 | #define prepare_to_copy(tsk) do { } while(0) | |
123 | ||
124 | /* Return saved PC of a blocked thread */ | |
125 | #define thread_saved_pc(tsk) ((tsk)->thread.cpu_context.pc) | |
126 | ||
127 | struct pt_regs; | |
128 | void show_trace(struct task_struct *task, unsigned long *stack, | |
129 | struct pt_regs *regs); | |
130 | ||
131 | extern unsigned long get_wchan(struct task_struct *p); | |
132 | ||
133 | #define KSTK_EIP(tsk) ((tsk)->thread.cpu_context.pc) | |
134 | #define KSTK_ESP(tsk) ((tsk)->thread.cpu_context.ksp) | |
135 | ||
136 | #define ARCH_HAS_PREFETCH | |
137 | ||
138 | static inline void prefetch(const void *x) | |
139 | { | |
140 | const char *c = x; | |
141 | asm volatile("pref %0" : : "r"(c)); | |
142 | } | |
143 | #define PREFETCH_STRIDE L1_CACHE_BYTES | |
144 | ||
145 | #endif /* __ASSEMBLY__ */ | |
146 | ||
147 | #endif /* __ASM_AVR32_PROCESSOR_H */ |