1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*
* Copyright (C) 2004-2006 Atmel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_AVR32_PROCESSOR_H
#define __ASM_AVR32_PROCESSOR_H
#include <asm/page.h>
#include <asm/cache.h>
#define TASK_SIZE 0x80000000
#ifdef __KERNEL__
#define STACK_TOP TASK_SIZE
#define STACK_TOP_MAX STACK_TOP
#endif
#ifndef __ASSEMBLY__
static inline void *current_text_addr(void)
{
register void *pc asm("pc");
return pc;
}
enum arch_type {
ARCH_AVR32A,
ARCH_AVR32B,
ARCH_MAX
};
enum cpu_type {
CPU_MORGAN,
CPU_AT32AP,
CPU_MAX
};
enum tlb_config {
TLB_NONE,
TLB_SPLIT,
TLB_UNIFIED,
TLB_INVALID
};
#define AVR32_FEATURE_RMW (1 << 0)
#define AVR32_FEATURE_DSP (1 << 1)
#define AVR32_FEATURE_SIMD (1 << 2)
#define AVR32_FEATURE_OCD (1 << 3)
#define AVR32_FEATURE_PCTR (1 << 4)
#define AVR32_FEATURE_JAVA (1 << 5)
#define AVR32_FEATURE_FPU (1 << 6)
struct avr32_cpuinfo {
struct clk *clk;
unsigned long loops_per_jiffy;
enum arch_type arch_type;
enum cpu_type cpu_type;
unsigned short arch_revision;
unsigned short cpu_revision;
enum tlb_config tlb_config;
unsigned long features;
u32 device_id;
struct cache_info icache;
struct cache_info dcache;
};
static inline unsigned int avr32_get_manufacturer_id(struct avr32_cpuinfo *cpu)
{
return (cpu->device_id >> 1) & 0x7f;
}
static inline unsigned int avr32_get_product_number(struct avr32_cpuinfo *cpu)
{
return (cpu->device_id >> 12) & 0xffff;
}
static inline unsigned int avr32_get_chip_revision(struct avr32_cpuinfo *cpu)
{
return (cpu->device_id >> 28) & 0x0f;
}
extern struct avr32_cpuinfo boot_cpu_data;
/* No SMP support so far */
#define current_cpu_data boot_cpu_data
/* This decides where the kernel will search for a free chunk of vm
* space during mmap's
*/
#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
#define cpu_relax() barrier()
#define cpu_relax_lowlatency() cpu_relax()
#define cpu_sync_pipeline() asm volatile("sub pc, -2" : : : "memory")
struct cpu_context {
unsigned long sr;
unsigned long pc;
unsigned long ksp; /* Kernel stack pointer */
unsigned long r7;
unsigned long r6;
unsigned long r5;
unsigned long r4;
unsigned long r3;
unsigned long r2;
unsigned long r1;
unsigned long r0;
};
/* This struct contains the CPU context as stored by switch_to() */
struct thread_struct {
struct cpu_context cpu_context;
unsigned long single_step_addr;
u16 single_step_insn;
};
#define INIT_THREAD { \
.cpu_context = { \
.ksp = sizeof(init_stack) + (long)&init_stack, \
}, \
}
/*
* Do necessary setup to start up a newly executed thread.
*/
#define start_thread(regs, new_pc, new_sp) \
do { \
memset(regs, 0, sizeof(*regs)); \
regs->sr = MODE_USER; \
regs->pc = new_pc & ~1; \
regs->sp = new_sp; \
} while(0)
struct task_struct;
/* Free all resources held by a thread */
extern void release_thread(struct task_struct *);
/* Return saved PC of a blocked thread */
#define thread_saved_pc(tsk) ((tsk)->thread.cpu_context.pc)
struct pt_regs;
extern unsigned long get_wchan(struct task_struct *p);
extern void show_regs_log_lvl(struct pt_regs *regs, const char *log_lvl);
extern void show_stack_log_lvl(struct task_struct *tsk, unsigned long sp,
struct pt_regs *regs, const char *log_lvl);
#define task_pt_regs(p) \
((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1)
#define KSTK_EIP(tsk) ((tsk)->thread.cpu_context.pc)
#define KSTK_ESP(tsk) ((tsk)->thread.cpu_context.ksp)
#define ARCH_HAS_PREFETCH
static inline void prefetch(const void *x)
{
const char *c = x;
asm volatile("pref %0" : : "r"(c));
}
#define PREFETCH_STRIDE L1_CACHE_BYTES
#endif /* __ASSEMBLY__ */
#endif /* __ASM_AVR32_PROCESSOR_H */
|
