Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
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
43struct 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
56extern struct avr32_cpuinfo boot_cpu_data;
57
58#ifdef CONFIG_SMP
59extern 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
74struct 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() */
89struct 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
113struct task_struct;
114
115/* Free all resources held by a thread */
116extern void release_thread(struct task_struct *);
117
118/* Create a kernel thread without removing it from tasklists */
119extern 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
127struct pt_regs;
128void show_trace(struct task_struct *task, unsigned long *stack,
129 struct pt_regs *regs);
130
131extern 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
138static 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 */