2 * Copyright (C) 2004-2006 Atmel Corporation
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.
8 #ifndef __ASM_AVR32_PROCESSOR_H
9 #define __ASM_AVR32_PROCESSOR_H
12 #include <asm/cache.h>
14 #define TASK_SIZE 0x80000000
18 static inline void *current_text_addr(void)
20 register void *pc asm("pc");
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)
51 struct avr32_cpuinfo {
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;
62 struct cache_info icache;
63 struct cache_info dcache;
66 static inline unsigned int avr32_get_manufacturer_id(struct avr32_cpuinfo *cpu)
68 return (cpu->device_id >> 1) & 0x7f;
70 static inline unsigned int avr32_get_product_number(struct avr32_cpuinfo *cpu)
72 return (cpu->device_id >> 12) & 0xffff;
74 static inline unsigned int avr32_get_chip_revision(struct avr32_cpuinfo *cpu)
76 return (cpu->device_id >> 28) & 0x0f;
79 extern struct avr32_cpuinfo boot_cpu_data;
82 extern struct avr32_cpuinfo cpu_data[];
83 #define current_cpu_data cpu_data[smp_processor_id()]
85 #define cpu_data (&boot_cpu_data)
86 #define current_cpu_data boot_cpu_data
89 /* This decides where the kernel will search for a free chunk of vm
92 #define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
94 #define cpu_relax() barrier()
95 #define cpu_sync_pipeline() asm volatile("sub pc, -2" : : : "memory")
100 unsigned long ksp; /* Kernel stack pointer */
111 /* This struct contains the CPU context as stored by switch_to() */
112 struct thread_struct {
113 struct cpu_context cpu_context;
114 unsigned long single_step_addr;
115 u16 single_step_insn;
118 #define INIT_THREAD { \
120 .ksp = sizeof(init_stack) + (long)&init_stack, \
125 * Do necessary setup to start up a newly executed thread.
127 #define start_thread(regs, new_pc, new_sp) \
130 memset(regs, 0, sizeof(*regs)); \
131 regs->sr = MODE_USER; \
132 regs->pc = new_pc & ~1; \
138 /* Free all resources held by a thread */
139 extern void release_thread(struct task_struct *);
141 /* Create a kernel thread without removing it from tasklists */
142 extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
144 /* Prepare to copy thread state - unlazy all lazy status */
145 #define prepare_to_copy(tsk) do { } while(0)
147 /* Return saved PC of a blocked thread */
148 #define thread_saved_pc(tsk) ((tsk)->thread.cpu_context.pc)
151 extern unsigned long get_wchan(struct task_struct *p);
152 extern void show_regs_log_lvl(struct pt_regs *regs, const char *log_lvl);
153 extern void show_stack_log_lvl(struct task_struct *tsk, unsigned long sp,
154 struct pt_regs *regs, const char *log_lvl);
156 #define task_pt_regs(p) \
157 ((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1)
159 #define KSTK_EIP(tsk) ((tsk)->thread.cpu_context.pc)
160 #define KSTK_ESP(tsk) ((tsk)->thread.cpu_context.ksp)
162 #define ARCH_HAS_PREFETCH
164 static inline void prefetch(const void *x)
167 asm volatile("pref %0" : : "r"(c));
169 #define PREFETCH_STRIDE L1_CACHE_BYTES
171 #endif /* __ASSEMBLY__ */
173 #endif /* __ASM_AVR32_PROCESSOR_H */