1 #ifndef _ASM_M32R_PROCESSOR_H
2 #define _ASM_M32R_PROCESSOR_H
5 * include/asm-m32r/processor.h
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License. See the file "COPYING" in the main directory of this archive
11 * Copyright (C) 1994 Linus Torvalds
12 * Copyright (C) 2001 Hiroyuki Kondo, Hirokazu Takata, and Hitoshi Yamamoto
13 * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org>
16 #include <linux/kernel.h>
17 #include <asm/cache.h>
18 #include <asm/ptrace.h> /* pt_regs */
21 * Default implementation of macro that returns current
22 * instruction pointer ("program counter").
24 #define current_text_addr() ({ __label__ _l; _l: &&_l; })
27 * CPU type and hardware bug flags. Kept separately for each CPU.
28 * Members of this structure are referenced in head.S, so think twice
29 * before touching them. [mj]
33 unsigned long pgtable_cache_sz;
34 unsigned long cpu_clock;
35 unsigned long bus_clock;
36 unsigned long timer_divide;
37 unsigned long loops_per_jiffy;
41 * capabilities of CPUs
44 extern struct cpuinfo_m32r boot_cpu_data;
47 extern struct cpuinfo_m32r cpu_data[];
48 #define current_cpu_data cpu_data[smp_processor_id()]
50 #define cpu_data (&boot_cpu_data)
51 #define current_cpu_data boot_cpu_data
55 * User space process size: 2GB (default).
58 #define TASK_SIZE (0x80000000UL)
60 #define TASK_SIZE (0x00400000UL)
64 #define STACK_TOP TASK_SIZE
65 #define STACK_TOP_MAX STACK_TOP
68 /* This decides where the kernel will search for a free chunk of vm
69 * space during mmap's.
71 #define TASK_UNMAPPED_BASE PAGE_ALIGN(TASK_SIZE / 3)
81 unsigned long addr[MAX_TRAPS];
82 unsigned long insn[MAX_TRAPS];
85 struct thread_struct {
86 unsigned long address;
87 unsigned long trap_no; /* Trap number */
88 unsigned long error_code; /* Error code of trap */
89 unsigned long lr; /* saved pc */
90 unsigned long sp; /* user stack pointer */
91 struct debug_trap debug_trap;
94 #define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack)
96 #define INIT_THREAD { \
101 * Do necessary setup to start up a newly executed thread.
104 /* User process Backup PSW */
105 #define USERPS_BPSW (M32R_PSW_BSM|M32R_PSW_BIE|M32R_PSW_BPM)
107 #define start_thread(regs, new_pc, new_spu) \
110 regs->psw = (regs->psw | USERPS_BPSW) & 0x0000FFFFUL; \
111 regs->bpc = new_pc; \
112 regs->spu = new_spu; \
115 /* Forward declaration, a strange C thing */
119 /* Free all resources held by a thread. */
120 extern void release_thread(struct task_struct *);
122 #define prepare_to_copy(tsk) do { } while (0)
125 * create a kernel thread without removing it from tasklists
127 extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
129 /* Copy and release all segment info associated with a VM */
130 extern void copy_segments(struct task_struct *p, struct mm_struct * mm);
131 extern void release_segments(struct mm_struct * mm);
133 extern unsigned long thread_saved_pc(struct task_struct *);
135 /* Copy and release all segment info associated with a VM */
136 #define copy_segments(p, mm) do { } while (0)
137 #define release_segments(mm) do { } while (0)
139 unsigned long get_wchan(struct task_struct *p);
140 #define KSTK_EIP(tsk) ((tsk)->thread.lr)
141 #define KSTK_ESP(tsk) ((tsk)->thread.sp)
143 #define THREAD_SIZE (2*PAGE_SIZE)
145 #define cpu_relax() barrier()
147 #endif /* _ASM_M32R_PROCESSOR_H */