ia64/linux-2.6.18-xen.hg

view include/asm-m68k/processor.h @ 452:c7ed6fe5dca0

kexec: dont initialise regions in reserve_memory()

There is no need to initialise efi_memmap_res and boot_param_res in
reserve_memory() for the initial xen domain as it is done in
machine_kexec_setup_resources() using values from the kexec hypercall.

Signed-off-by: Simon Horman <horms@verge.net.au>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 28 10:55:18 2008 +0000 (2008-02-28)
parents 831230e53067
children
line source
1 /*
2 * include/asm-m68k/processor.h
3 *
4 * Copyright (C) 1995 Hamish Macdonald
5 */
7 #ifndef __ASM_M68K_PROCESSOR_H
8 #define __ASM_M68K_PROCESSOR_H
10 /*
11 * Default implementation of macro that returns current
12 * instruction pointer ("program counter").
13 */
14 #define current_text_addr() ({ __label__ _l; _l: &&_l;})
16 #include <linux/thread_info.h>
17 #include <asm/segment.h>
18 #include <asm/fpu.h>
19 #include <asm/ptrace.h>
21 static inline unsigned long rdusp(void)
22 {
23 unsigned long usp;
25 __asm__ __volatile__("move %/usp,%0" : "=a" (usp));
26 return usp;
27 }
29 static inline void wrusp(unsigned long usp)
30 {
31 __asm__ __volatile__("move %0,%/usp" : : "a" (usp));
32 }
34 /*
35 * User space process size: 3.75GB. This is hardcoded into a few places,
36 * so don't change it unless you know what you are doing.
37 */
38 #ifndef CONFIG_SUN3
39 #define TASK_SIZE (0xF0000000UL)
40 #else
41 #ifdef __ASSEMBLY__
42 #define TASK_SIZE (0x0E000000)
43 #else
44 #define TASK_SIZE (0x0E000000UL)
45 #endif
46 #endif
48 /* This decides where the kernel will search for a free chunk of vm
49 * space during mmap's.
50 */
51 #ifndef CONFIG_SUN3
52 #define TASK_UNMAPPED_BASE 0xC0000000UL
53 #else
54 #define TASK_UNMAPPED_BASE 0x0A000000UL
55 #endif
56 #define TASK_UNMAPPED_ALIGN(addr, off) PAGE_ALIGN(addr)
58 struct thread_struct {
59 unsigned long ksp; /* kernel stack pointer */
60 unsigned long usp; /* user stack pointer */
61 unsigned short sr; /* saved status register */
62 unsigned short fs; /* saved fs (sfc, dfc) */
63 unsigned long crp[2]; /* cpu root pointer */
64 unsigned long esp0; /* points to SR of stack frame */
65 unsigned long faddr; /* info about last fault */
66 int signo, code;
67 unsigned long fp[8*3];
68 unsigned long fpcntl[3]; /* fp control regs */
69 unsigned char fpstate[FPSTATESIZE]; /* floating point state */
70 struct thread_info info;
71 };
73 #define INIT_THREAD { \
74 .ksp = sizeof(init_stack) + (unsigned long) init_stack, \
75 .sr = PS_S, \
76 .fs = __KERNEL_DS, \
77 .info = INIT_THREAD_INFO(init_task), \
78 }
80 /*
81 * Do necessary setup to start up a newly executed thread.
82 */
83 static inline void start_thread(struct pt_regs * regs, unsigned long pc,
84 unsigned long usp)
85 {
86 /* reads from user space */
87 set_fs(USER_DS);
89 regs->pc = pc;
90 regs->sr &= ~0x2000;
91 wrusp(usp);
92 }
94 /* Forward declaration, a strange C thing */
95 struct task_struct;
97 /* Free all resources held by a thread. */
98 static inline void release_thread(struct task_struct *dead_task)
99 {
100 }
102 /* Prepare to copy thread state - unlazy all lazy status */
103 #define prepare_to_copy(tsk) do { } while (0)
105 extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
107 /*
108 * Free current thread data structures etc..
109 */
110 static inline void exit_thread(void)
111 {
112 }
114 extern unsigned long thread_saved_pc(struct task_struct *tsk);
116 unsigned long get_wchan(struct task_struct *p);
118 #define KSTK_EIP(tsk) \
119 ({ \
120 unsigned long eip = 0; \
121 if ((tsk)->thread.esp0 > PAGE_SIZE && \
122 (virt_addr_valid((tsk)->thread.esp0))) \
123 eip = ((struct pt_regs *) (tsk)->thread.esp0)->pc; \
124 eip; })
125 #define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp)
127 #define cpu_relax() barrier()
129 #endif