Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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
18static inline void *current_text_addr(void)
19{
20 register void *pc asm("pc");
21 return pc;
22}
23
24enum arch_type {
25 ARCH_AVR32A,
26 ARCH_AVR32B,
27 ARCH_MAX
28};
29
30enum cpu_type {
31 CPU_MORGAN,
32 CPU_AT32AP,
33 CPU_MAX
34};
35
36enum tlb_config {
37 TLB_NONE,
38 TLB_SPLIT,
39 TLB_UNIFIED,
40 TLB_INVALID
41};
42
43#define AVR32_FEATURE_RMW (1 << 0)
44#define AVR32_FEATURE_DSP (1 << 1)
45#define AVR32_FEATURE_SIMD (1 << 2)
46#define AVR32_FEATURE_OCD (1 << 3)
47#define AVR32_FEATURE_PCTR (1 << 4)
48#define AVR32_FEATURE_JAVA (1 << 5)
49#define AVR32_FEATURE_FPU (1 << 6)
50
51struct avr32_cpuinfo {
52 struct clk *clk;
53 unsigned long loops_per_jiffy;
54 enum arch_type arch_type;
55 enum cpu_type cpu_type;
56 unsigned short arch_revision;
57 unsigned short cpu_revision;
58 enum tlb_config tlb_config;
59 unsigned long features;
60 u32 device_id;
61
62 struct cache_info icache;
63 struct cache_info dcache;
64};
65
66static inline unsigned int avr32_get_manufacturer_id(struct avr32_cpuinfo *cpu)
67{
68 return (cpu->device_id >> 1) & 0x7f;
69}
70static inline unsigned int avr32_get_product_number(struct avr32_cpuinfo *cpu)
71{
72 return (cpu->device_id >> 12) & 0xffff;
73}
74static inline unsigned int avr32_get_chip_revision(struct avr32_cpuinfo *cpu)
75{
76 return (cpu->device_id >> 28) & 0x0f;
77}
78
79extern struct avr32_cpuinfo boot_cpu_data;
80
81#ifdef CONFIG_SMP
82extern struct avr32_cpuinfo cpu_data[];
83#define current_cpu_data cpu_data[smp_processor_id()]
84#else
85#define cpu_data (&boot_cpu_data)
86#define current_cpu_data boot_cpu_data
87#endif
88
89/* This decides where the kernel will search for a free chunk of vm
90 * space during mmap's
91 */
92#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
93
94#define cpu_relax() barrier()
95#define cpu_sync_pipeline() asm volatile("sub pc, -2" : : : "memory")
96
97struct cpu_context {
98 unsigned long sr;
99 unsigned long pc;
100 unsigned long ksp; /* Kernel stack pointer */
101 unsigned long r7;
102 unsigned long r6;
103 unsigned long r5;
104 unsigned long r4;
105 unsigned long r3;
106 unsigned long r2;
107 unsigned long r1;
108 unsigned long r0;
109};
110
111/* This struct contains the CPU context as stored by switch_to() */
112struct thread_struct {
113 struct cpu_context cpu_context;
114 unsigned long single_step_addr;
115 u16 single_step_insn;
116};
117
118#define INIT_THREAD { \
119 .cpu_context = { \
120 .ksp = sizeof(init_stack) + (long)&init_stack, \
121 }, \
122}
123
124/*
125 * Do necessary setup to start up a newly executed thread.
126 */
127#define start_thread(regs, new_pc, new_sp) \
128 do { \
129 set_fs(USER_DS); \
130 memset(regs, 0, sizeof(*regs)); \
131 regs->sr = MODE_USER; \
132 regs->pc = new_pc & ~1; \
133 regs->sp = new_sp; \
134 } while(0)
135
136struct task_struct;
137
138/* Free all resources held by a thread */
139extern void release_thread(struct task_struct *);
140
141/* Create a kernel thread without removing it from tasklists */
142extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
143
144/* Prepare to copy thread state - unlazy all lazy status */
145#define prepare_to_copy(tsk) do { } while(0)
146
147/* Return saved PC of a blocked thread */
148#define thread_saved_pc(tsk) ((tsk)->thread.cpu_context.pc)
149
150struct pt_regs;
151extern unsigned long get_wchan(struct task_struct *p);
152extern void show_regs_log_lvl(struct pt_regs *regs, const char *log_lvl);
153extern void show_stack_log_lvl(struct task_struct *tsk, unsigned long sp,
154 struct pt_regs *regs, const char *log_lvl);
155
156#define task_pt_regs(p) \
157 ((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1)
158
159#define KSTK_EIP(tsk) ((tsk)->thread.cpu_context.pc)
160#define KSTK_ESP(tsk) ((tsk)->thread.cpu_context.ksp)
161
162#define ARCH_HAS_PREFETCH
163
164static inline void prefetch(const void *x)
165{
166 const char *c = x;
167 asm volatile("pref %0" : : "r"(c));
168}
169#define PREFETCH_STRIDE L1_CACHE_BYTES
170
171#endif /* __ASSEMBLY__ */
172
173#endif /* __ASM_AVR32_PROCESSOR_H */