diff options
Diffstat (limited to 'sys/amd64/include/xen/xen-os.h')
| -rw-r--r-- | sys/amd64/include/xen/xen-os.h | 219 |
1 files changed, 26 insertions, 193 deletions
diff --git a/sys/amd64/include/xen/xen-os.h b/sys/amd64/include/xen/xen-os.h index 8974323..ee498b9 100644 --- a/sys/amd64/include/xen/xen-os.h +++ b/sys/amd64/include/xen/xen-os.h @@ -1,40 +1,42 @@ /****************************************************************************** - * os.h + * amd64/xen/xen-os.h * - * random collection of macros and definition + * Random collection of macros and definition + * + * Copyright (c) 2003, 2004 Keir Fraser (on behalf of the Xen team) + * All rights reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. * * $FreeBSD$ */ -#ifndef _XEN_OS_H_ -#define _XEN_OS_H_ +#ifndef _MACHINE_XEN_XEN_OS_H_ +#define _MACHINE_XEN_XEN_OS_H_ #ifdef PAE #define CONFIG_X86_PAE #endif -#ifdef LOCORE -#define __ASSEMBLY__ -#endif - -#if !defined(__XEN_INTERFACE_VERSION__) -#define __XEN_INTERFACE_VERSION__ 0x00030208 -#endif - -#define GRANT_REF_INVALID 0xffffffff - -#include <xen/interface/xen.h> - /* Everything below this point is not included by assembler (.S) files. */ #ifndef __ASSEMBLY__ -/* Force a proper event-channel callback from Xen. */ -void force_evtchn_callback(void); - -extern int gdtset; - -extern shared_info_t *HYPERVISOR_shared_info; - /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ static inline void rep_nop(void) { @@ -42,161 +44,12 @@ static inline void rep_nop(void) } #define cpu_relax() rep_nop() -/* crude memory allocator for memory allocation early in - * boot - */ -void *bootmem_alloc(unsigned int size); -void bootmem_free(void *ptr, unsigned int size); - -void printk(const char *fmt, ...); - -/* some function prototypes */ -void trap_init(void); - -#define likely(x) __builtin_expect((x),1) -#define unlikely(x) __builtin_expect((x),0) - -#ifndef XENHVM - -/* - * STI/CLI equivalents. These basically set and clear the virtual - * event_enable flag in the shared_info structure. Note that when - * the enable bit is set, there may be pending events to be handled. - * We may therefore call into do_hypervisor_callback() directly. - */ - -#define __cli() \ -do { \ - vcpu_info_t *_vcpu; \ - _vcpu = &HYPERVISOR_shared_info->vcpu_info[PCPU_GET(cpuid)]; \ - _vcpu->evtchn_upcall_mask = 1; \ - barrier(); \ -} while (0) - -#define __sti() \ -do { \ - vcpu_info_t *_vcpu; \ - barrier(); \ - _vcpu = &HYPERVISOR_shared_info->vcpu_info[PCPU_GET(cpuid)]; \ - _vcpu->evtchn_upcall_mask = 0; \ - barrier(); /* unmask then check (avoid races) */ \ - if ( unlikely(_vcpu->evtchn_upcall_pending) ) \ - force_evtchn_callback(); \ -} while (0) - -#define __restore_flags(x) \ -do { \ - vcpu_info_t *_vcpu; \ - barrier(); \ - _vcpu = &HYPERVISOR_shared_info->vcpu_info[PCPU_GET(cpuid)]; \ - if ((_vcpu->evtchn_upcall_mask = (x)) == 0) { \ - barrier(); /* unmask then check (avoid races) */ \ - if ( unlikely(_vcpu->evtchn_upcall_pending) ) \ - force_evtchn_callback(); \ - } \ -} while (0) - -/* - * Add critical_{enter, exit}? - * - */ -#define __save_and_cli(x) \ -do { \ - vcpu_info_t *_vcpu; \ - _vcpu = &HYPERVISOR_shared_info->vcpu_info[PCPU_GET(cpuid)]; \ - (x) = _vcpu->evtchn_upcall_mask; \ - _vcpu->evtchn_upcall_mask = 1; \ - barrier(); \ -} while (0) - - -#define cli() __cli() -#define sti() __sti() -#define save_flags(x) __save_flags(x) -#define restore_flags(x) __restore_flags(x) -#define save_and_cli(x) __save_and_cli(x) - -#define local_irq_save(x) __save_and_cli(x) -#define local_irq_restore(x) __restore_flags(x) -#define local_irq_disable() __cli() -#define local_irq_enable() __sti() - -#define mtx_lock_irqsave(lock, x) {local_irq_save((x)); mtx_lock_spin((lock));} -#define mtx_unlock_irqrestore(lock, x) {mtx_unlock_spin((lock)); local_irq_restore((x)); } -#define spin_lock_irqsave mtx_lock_irqsave -#define spin_unlock_irqrestore mtx_unlock_irqrestore - -#else -#endif - -#ifndef xen_mb -#define xen_mb() mb() -#endif -#ifndef xen_rmb -#define xen_rmb() rmb() -#endif -#ifndef xen_wmb -#define xen_wmb() wmb() -#endif -#ifdef SMP -#define smp_mb() mb() -#define smp_rmb() rmb() -#define smp_wmb() wmb() -#define smp_read_barrier_depends() read_barrier_depends() -#define set_mb(var, value) do { xchg(&var, value); } while (0) -#else -#define smp_mb() barrier() -#define smp_rmb() barrier() -#define smp_wmb() barrier() -#define smp_read_barrier_depends() do { } while(0) -#define set_mb(var, value) do { var = value; barrier(); } while (0) -#endif - - /* This is a barrier for the compiler only, NOT the processor! */ #define barrier() __asm__ __volatile__("": : :"memory") #define LOCK_PREFIX "" #define LOCK "" #define ADDR (*(volatile long *) addr) -/* - * Make sure gcc doesn't try to be clever and move things around - * on us. We need to use _exactly_ the address the user gave us, - * not some alias that contains the same information. - */ -typedef struct { volatile int counter; } atomic_t; - - - -#define xen_xchg(ptr,v) \ - ((__typeof__(*(ptr)))__xchg((unsigned long)(v),(ptr),sizeof(*(ptr)))) -struct __xchg_dummy { unsigned long a[100]; }; -#define __xg(x) ((volatile struct __xchg_dummy *)(x)) -static __inline unsigned long __xchg(unsigned long x, volatile void * ptr, - int size) -{ - switch (size) { - case 1: - __asm__ __volatile__("xchgb %b0,%1" - :"=q" (x) - :"m" (*__xg(ptr)), "0" (x) - :"memory"); - break; - case 2: - __asm__ __volatile__("xchgw %w0,%1" - :"=r" (x) - :"m" (*__xg(ptr)), "0" (x) - :"memory"); - break; - case 4: - __asm__ __volatile__("xchgl %0,%1" - :"=r" (x) - :"m" (*__xg(ptr)), "0" (x) - :"memory"); - break; - } - return x; -} /** * test_and_clear_bit - Clear a bit and return its old value @@ -238,7 +91,6 @@ static __inline int variable_test_bit(int nr, volatile void * addr) constant_test_bit((nr),(addr)) : \ variable_test_bit((nr),(addr))) - /** * set_bit - Atomically set a bit in memory * @nr: the bit to set @@ -275,25 +127,6 @@ static __inline__ void clear_bit(int nr, volatile void * addr) :"Ir" (nr)); } -/** - * atomic_inc - increment atomic variable - * @v: pointer of type atomic_t - * - * Atomically increments @v by 1. Note that the guaranteed - * useful range of an atomic_t is only 24 bits. - */ -static __inline__ void atomic_inc(atomic_t *v) -{ - __asm__ __volatile__( - LOCK "incl %0" - :"=m" (v->counter) - :"m" (v->counter)); -} - - -#define rdtscll(val) \ - __asm__ __volatile__("rdtsc" : "=A" (val)) - #endif /* !__ASSEMBLY__ */ -#endif /* _OS_H_ */ +#endif /* _MACHINE_XEN_XEN_OS_H_ */ |
