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Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -07001/*
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
Haavard Skinnemoen3b328c92007-03-13 15:30:38 +010043#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
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -070051struct 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;
Haavard Skinnemoen3b328c92007-03-13 15:30:38 +010059 unsigned long features;
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -070060
61 struct cache_info icache;
62 struct cache_info dcache;
63};
64
65extern struct avr32_cpuinfo boot_cpu_data;
66
67#ifdef CONFIG_SMP
68extern struct avr32_cpuinfo cpu_data[];
69#define current_cpu_data cpu_data[smp_processor_id()]
70#else
71#define cpu_data (&boot_cpu_data)
72#define current_cpu_data boot_cpu_data
73#endif
74
75/* This decides where the kernel will search for a free chunk of vm
76 * space during mmap's
77 */
78#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
79
80#define cpu_relax() barrier()
81#define cpu_sync_pipeline() asm volatile("sub pc, -2" : : : "memory")
82
83struct cpu_context {
84 unsigned long sr;
85 unsigned long pc;
86 unsigned long ksp; /* Kernel stack pointer */
87 unsigned long r7;
88 unsigned long r6;
89 unsigned long r5;
90 unsigned long r4;
91 unsigned long r3;
92 unsigned long r2;
93 unsigned long r1;
94 unsigned long r0;
95};
96
97/* This struct contains the CPU context as stored by switch_to() */
98struct thread_struct {
99 struct cpu_context cpu_context;
100 unsigned long single_step_addr;
101 u16 single_step_insn;
102};
103
104#define INIT_THREAD { \
105 .cpu_context = { \
106 .ksp = sizeof(init_stack) + (long)&init_stack, \
107 }, \
108}
109
110/*
111 * Do necessary setup to start up a newly executed thread.
112 */
113#define start_thread(regs, new_pc, new_sp) \
114 do { \
115 set_fs(USER_DS); \
116 memset(regs, 0, sizeof(*regs)); \
117 regs->sr = MODE_USER; \
118 regs->pc = new_pc & ~1; \
119 regs->sp = new_sp; \
120 } while(0)
121
122struct task_struct;
123
124/* Free all resources held by a thread */
125extern void release_thread(struct task_struct *);
126
127/* Create a kernel thread without removing it from tasklists */
128extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
129
130/* Prepare to copy thread state - unlazy all lazy status */
131#define prepare_to_copy(tsk) do { } while(0)
132
133/* Return saved PC of a blocked thread */
134#define thread_saved_pc(tsk) ((tsk)->thread.cpu_context.pc)
135
136struct pt_regs;
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700137extern unsigned long get_wchan(struct task_struct *p);
Haavard Skinnemoen623b0352007-03-13 17:59:11 +0100138extern void show_regs_log_lvl(struct pt_regs *regs, const char *log_lvl);
139extern void show_stack_log_lvl(struct task_struct *tsk, unsigned long sp,
140 struct pt_regs *regs, const char *log_lvl);
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700141
142#define KSTK_EIP(tsk) ((tsk)->thread.cpu_context.pc)
143#define KSTK_ESP(tsk) ((tsk)->thread.cpu_context.ksp)
144
145#define ARCH_HAS_PREFETCH
146
147static inline void prefetch(const void *x)
148{
149 const char *c = x;
150 asm volatile("pref %0" : : "r"(c));
151}
152#define PREFETCH_STRIDE L1_CACHE_BYTES
153
154#endif /* __ASSEMBLY__ */
155
156#endif /* __ASM_AVR32_PROCESSOR_H */