2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
6 #ifndef __UM_PROCESSOR_GENERIC_H
7 #define __UM_PROCESSOR_GENERIC_H
13 #include "linux/config.h"
14 #include "asm/ptrace.h"
15 #include "choose-mode.h"
16 #include "registers.h"
20 struct thread_struct {
21 /* This flag is set to 1 before calling do_fork (and analyzed in
22 * copy_thread) to mark that we are begin called from userspace (fork /
23 * vfork / clone), and reset to 0 after. It is left to 0 when called
24 * from kernelspace (i.e. kernel_thread() or fork_idle(), as of 2.6.11). */
25 struct task_struct *saved_task;
29 int singlestep_syscall;
32 struct task_struct *prev_sched;
33 unsigned long temp_stack;
35 struct arch_thread arch;
45 #ifdef CONFIG_MODE_SKAS
80 .arch = INIT_ARCH_THREAD, \
88 extern struct task_struct *alloc_task_struct(void);
90 extern void release_thread(struct task_struct *);
91 extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
92 extern void dump_thread(struct pt_regs *regs, struct user *u);
94 static inline void prepare_to_copy(struct task_struct *tsk)
99 extern unsigned long thread_saved_pc(struct task_struct *t);
101 static inline void mm_copy_segments(struct mm_struct *from_mm,
102 struct mm_struct *new_mm)
106 #define init_stack (init_thread_union.stack)
109 * User space process size: 3GB (default).
111 extern unsigned long task_size;
113 #define TASK_SIZE (task_size)
115 /* This decides where the kernel will search for a free chunk of vm
116 * space during mmap's.
118 #define TASK_UNMAPPED_BASE (0x40000000)
120 extern void start_thread(struct pt_regs *regs, unsigned long entry,
121 unsigned long stack);
124 unsigned long loops_per_jiffy;
128 extern struct cpuinfo_um boot_cpu_data;
130 #define my_cpu_data cpu_data[smp_processor_id()]
133 extern struct cpuinfo_um cpu_data[];
134 #define current_cpu_data cpu_data[smp_processor_id()]
136 #define cpu_data (&boot_cpu_data)
137 #define current_cpu_data boot_cpu_data
141 #ifdef CONFIG_MODE_SKAS
142 #define KSTK_REG(tsk, reg) \
143 ({ union uml_pt_regs regs; \
144 get_thread_regs(®s, tsk->thread.mode.skas.switch_buf); \
145 UPT_REG(®s, reg); })
147 #define KSTK_REG(tsk, reg) (0xbadbabe)
149 #define get_wchan(p) (0)