diff options
Diffstat (limited to 'sys/i386/include/xen/xen-os.h')
| -rw-r--r-- | sys/i386/include/xen/xen-os.h | 168 |
1 files changed, 46 insertions, 122 deletions
diff --git a/sys/i386/include/xen/xen-os.h b/sys/i386/include/xen/xen-os.h index 257202e..e15d668 100644 --- a/sys/i386/include/xen/xen-os.h +++ b/sys/i386/include/xen/xen-os.h @@ -1,52 +1,64 @@ -/****************************************************************************** - * os.h +/***************************************************************************** + * i386/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_ -#include <machine/param.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); -#define likely(x) __builtin_expect((x),1) -#define unlikely(x) __builtin_expect((x),0) +/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ +static inline void rep_nop(void) +{ + __asm__ __volatile__ ( "rep;nop" : : : "memory" ); +} +#define cpu_relax() rep_nop() -#ifndef vtophys -#include <vm/vm.h> -#include <vm/vm_param.h> -#include <vm/pmap.h> -#endif +#ifndef XENHVM +void xc_printf(const char *fmt, ...); -extern int gdtset; #ifdef SMP +extern int gdtset; + #include <sys/time.h> /* XXX for pcpu.h */ #include <sys/pcpu.h> /* XXX for PCPU_GET */ static inline int smp_processor_id(void) { - if (likely(gdtset)) + if (__predict_true(gdtset)) return PCPU_GET(cpuid); return 0; } @@ -55,50 +67,16 @@ smp_processor_id(void) #define smp_processor_id() 0 #endif -#ifndef NULL -#define NULL (void *)0 -#endif - #ifndef PANIC_IF -#define PANIC_IF(exp) if (unlikely(exp)) {printk("panic - %s: %s:%d\n",#exp, __FILE__, __LINE__); panic("%s: %s:%d", #exp, __FILE__, __LINE__);} -#endif - -extern shared_info_t *HYPERVISOR_shared_info; - -/* Somewhere in the middle of the GCC 2.96 development cycle, we implemented - a mechanism by which the user can annotate likely branch directions and - expect the blocks to be reordered appropriately. Define __builtin_expect - to nothing for earlier compilers. */ - -/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ -static inline void rep_nop(void) -{ - __asm__ __volatile__ ( "rep;nop" : : : "memory" ); -} -#define cpu_relax() rep_nop() - - -#if __GNUC__ == 2 && __GNUC_MINOR__ < 96 -#define __builtin_expect(x, expected_value) (x) +#define PANIC_IF(exp) if (__predict_false(exp)) {printf("panic - %s: %s:%d\n",#exp, __FILE__, __LINE__); panic("%s: %s:%d", #exp, __FILE__, __LINE__);} #endif -#define per_cpu(var, cpu) (pcpu_find((cpu))->pc_ ## var) - -/* crude memory allocator for memory allocation early in - * boot +/* + * Crude memory allocator for memory allocation early in boot. */ void *bootmem_alloc(unsigned int size); void bootmem_free(void *ptr, unsigned int size); -#include <sys/types.h> - -void printk(const char *fmt, ...); - -/* some function prototypes */ -void trap_init(void); - -#ifndef XENHVM - /* * STI/CLI equivalents. These basically set and clear the virtual * event_enable flag in the shared_info structure. Note that when @@ -106,7 +84,6 @@ void trap_init(void); * We may therefore call into do_hypervisor_callback() directly. */ - #define __cli() \ do { \ vcpu_info_t *_vcpu; \ @@ -122,7 +99,7 @@ do { \ _vcpu = &HYPERVISOR_shared_info->vcpu_info[smp_processor_id()]; \ _vcpu->evtchn_upcall_mask = 0; \ barrier(); /* unmask then check (avoid races) */ \ - if ( unlikely(_vcpu->evtchn_upcall_pending) ) \ + if (__predict_false(_vcpu->evtchn_upcall_pending)) \ force_evtchn_callback(); \ } while (0) @@ -133,7 +110,7 @@ do { \ _vcpu = &HYPERVISOR_shared_info->vcpu_info[smp_processor_id()]; \ if ((_vcpu->evtchn_upcall_mask = (x)) == 0) { \ barrier(); /* unmask then check (avoid races) */ \ - if ( unlikely(_vcpu->evtchn_upcall_pending) ) \ + if (__predict_false(_vcpu->evtchn_upcall_pending)) \ force_evtchn_callback(); \ } \ } while (0) @@ -168,31 +145,7 @@ do { \ #define spin_lock_irqsave mtx_lock_irqsave #define spin_unlock_irqrestore mtx_unlock_irqrestore -#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 - +#endif /* !XENHVM */ /* This is a barrier for the compiler only, NOT the processor! */ #define barrier() __asm__ __volatile__("": : :"memory") @@ -207,8 +160,6 @@ do { \ */ 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]; }; @@ -335,33 +286,6 @@ static __inline__ void atomic_inc(atomic_t *v) #define rdtscll(val) \ __asm__ __volatile__("rdtsc" : "=A" (val)) - - -/* - * Kernel pointers have redundant information, so we can use a - * scheme where we can return either an error code or a dentry - * pointer with the same return value. - * - * This should be a per-architecture thing, to allow different - * error and pointer decisions. - */ -#define IS_ERR_VALUE(x) unlikely((x) > (unsigned long)-1000L) - -static inline void *ERR_PTR(long error) -{ - return (void *) error; -} - -static inline long PTR_ERR(const void *ptr) -{ - return (long) ptr; -} - -static inline long IS_ERR(const void *ptr) -{ - return IS_ERR_VALUE((unsigned long)ptr); -} - #endif /* !__ASSEMBLY__ */ -#endif /* _OS_H_ */ +#endif /* _MACHINE_XEN_XEN_OS_H_ */ |
