drivers/staging/hv/include/osd.h

   1 /*
   2  *
   3  * Copyright (c) 2009, Microsoft Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  16  * Place - Suite 330, Boston, MA 02111-1307 USA.
  17  *
  18  * Authors:
  19  *   Haiyang Zhang <haiyangz@microsoft.com>
  20  *   Hank Janssen  <hjanssen@microsoft.com>
  21  *
  22  */
  23
  24
  25 #ifndef _OSD_H_
  26 #define _OSD_H_
  27
  28
  29 /* Defines */
  30
  31
  32
  33 #define ALIGN_UP(value, align)                  ( ((value) & (align-1))? ( ((value) + (align-1)) & ~(align-1) ): (value) )
  34 #define ALIGN_DOWN(value, align)                ( (value) & ~(align-1) )
  35 #define NUM_PAGES_SPANNED(addr, len)    ( (ALIGN_UP(addr+len, PAGE_SIZE) - ALIGN_DOWN(addr, PAGE_SIZE)) >> PAGE_SHIFT )
  36
  37 #define LOWORD(dw)              ((unsigned short) (dw))
  38 #define HIWORD(dw)              ((unsigned short) (((unsigned int) (dw) >> 16) & 0xFFFF))
  39
  40 typedef struct _DLIST_ENTRY {
  41    struct _DLIST_ENTRY *Flink;
  42    struct _DLIST_ENTRY *Blink;
  43 } DLIST_ENTRY;
  44
  45
  46 /* Other types */
  47
  48 /* typedef unsigned char                GUID[16]; */
  49
  50 typedef void (*PFN_TIMER_CALLBACK)(void* context);
  51
  52
  53 typedef struct {
  54         unsigned char   Data[16];
  55 } GUID;
  56
  57 struct osd_waitevent {
  58         int     condition;
  59         wait_queue_head_t event;
  60 };
  61
  62 struct osd_timer {
  63         struct timer_list timer;
  64         PFN_TIMER_CALLBACK callback;
  65         void* context;
  66 };
  67
  68
  69
  70 #ifdef __x86_64__
  71
  72 #define RDMSR(reg, v) {                                                        \
  73     u32 h, l;                                                                 \
  74      __asm__ __volatile__("rdmsr"                                                               \
  75     : "=a" (l), "=d" (h)                                                       \
  76     : "c" (reg));                                                              \
  77     v = (((u64)h) << 32) | l;                                                         \
  78 }
  79
  80 #define WRMSR(reg, v) {                                                        \
  81     u32 h, l;                                                               \
  82     l = (u32)(((u64)(v)) & 0xFFFFFFFF);                                  \
  83     h = (u32)((((u64)(v)) >> 32) & 0xFFFFFFFF);                          \
  84      __asm__ __volatile__("wrmsr"                                              \
  85     : /* no outputs */                                                         \
  86     : "c" (reg), "a" (l), "d" (h));                                            \
  87 }
  88
  89 #else
  90
  91 #define RDMSR(reg, v)                                                                  \
  92      __asm__ __volatile__("rdmsr"                                                  \
  93     : "=A" (v)                                                                         \
  94     : "c" (reg))
  95
  96 #define WRMSR(reg, v)                                                                  \
  97      __asm__ __volatile__("wrmsr"                                                  \
  98     : /* no outputs */                                                                     \
  99     : "c" (reg), "A" ((u64)v))
 100
 101 #endif
 102
 103
 104 static inline void do_cpuid(unsigned int op, unsigned int *eax, unsigned int *ebx, unsigned int *ecx, unsigned int *edx)
 105 {
 106         __asm__ __volatile__("cpuid" : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx) : "0" (op), "c" (ecx));
 107 }
 108
 109
 110 /* Osd routines */
 111
 112 extern void* VirtualAllocExec(unsigned int size);
 113
 114 extern void* PageAlloc(unsigned int count);
 115 extern void PageFree(void* page, unsigned int count);
 116
 117 extern void* MemMapIO(unsigned long phys, unsigned long size);
 118 extern void MemUnmapIO(void* virt);
 119
 120 extern struct osd_timer *TimerCreate(PFN_TIMER_CALLBACK pfnTimerCB, void* context);
 121 extern void TimerClose(struct osd_timer *t);
 122 extern int TimerStop(struct osd_timer *t);
 123 extern void TimerStart(struct osd_timer *t, u32 expirationInUs);
 124
 125 extern struct osd_waitevent *WaitEventCreate(void);
 126 extern void WaitEventSet(struct osd_waitevent *waitEvent);
 127 extern int      WaitEventWait(struct osd_waitevent *waitEvent);
 128
 129 /* If >0, waitEvent got signaled. If ==0, timeout. If < 0, error */
 130 extern int      WaitEventWaitEx(struct osd_waitevent *waitEvent, u32 TimeoutInMs);
 131
 132
 133 #define GetVirtualAddress Physical2LogicalAddr
 134 void* Physical2LogicalAddr(unsigned long PhysAddr);
 135
 136 #define GetPhysicalAddress Logical2PhysicalAddr
 137 unsigned long Logical2PhysicalAddr(void * LogicalAddr);
 138
 139 unsigned long Virtual2Physical(void * VirtAddr);
 140
 141 void* PageMapVirtualAddress(unsigned long Pfn);
 142 void PageUnmapVirtualAddress(void* VirtAddr);
 143
 144
 145 int osd_schedule_callback(struct workqueue_struct *wq,
 146                           void (*func)(void *),
 147                           void *data);
 148
 149 #endif /* _OSD_H_ */