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186 lines
3.8 KiB
ArmAsm
186 lines
3.8 KiB
ArmAsm
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: ntoskrnl/ex/i386/fastinterlck_asm.S
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* PURPOSE: FASTCALL Interlocked Functions
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* PROGRAMMERS: Alex Ionescu (alex@relsoft.net)
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*/
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/* INCLUDES ******************************************************************/
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#include <asm.inc>
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#include <ks386.inc>
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#include <internal/i386/asmmacro.S>
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/* FUNCTIONS ****************************************************************/
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.code32
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/*
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* NOTE: These functions must obey the following rules:
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* - Acquire locks only on MP systems.
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* - Be safe at HIGH_LEVEL (no paged access).
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* - Preserve flags.
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* - Disable interrupts.
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*/
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/*VOID
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*FASTCALL
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*ExInterlockedAddLargeStatistic(IN PLARGE_INTEGER Addend,
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* IN ULONG Increment)
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*/
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PUBLIC @ExInterlockedAddLargeStatistic@8
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@ExInterlockedAddLargeStatistic@8:
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#ifdef CONFIG_SMP
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/* Do the addition */
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lock add [ecx], edx
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/* Check for carry bit and return */
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jc .l1
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ret
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.l1:
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/* Add carry */
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lock adc dword ptr [ecx+4], 0
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#else
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/* Do the addition and add the carry */
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add dword ptr [ecx], edx
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adc dword ptr [ecx+4], 0
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#endif
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/* Return */
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ret
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/*PSINGLE_LIST_ENTRY
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*FASTCALL
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*ExInterlockedPopEntrySList(IN PSINGLE_LIST_ENTRY ListHead,
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* IN PKSPIN_LOCK Lock)
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*/
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PUBLIC @ExInterlockedPopEntrySList@8
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PUBLIC @InterlockedPopEntrySList@4
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PUBLIC _ExpInterlockedPopEntrySListResume@0
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PUBLIC _ExpInterlockedPopEntrySListFault@0
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PUBLIC _ExpInterlockedPopEntrySListEnd@0
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@ExInterlockedPopEntrySList@8:
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@InterlockedPopEntrySList@4:
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/* Save registers */
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push ebx
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push ebp
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/* Pointer to list */
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mov ebp, ecx
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/* Get sequence number and link pointer */
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_ExpInterlockedPopEntrySListResume@0:
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mov edx, [ebp+4]
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mov eax, [ebp]
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/* Check if the list is empty */
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or eax, eax
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jz .l7
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/* Copy depth and adjust it */
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lea ecx, [edx-1]
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/* Get next pointer and do the exchange */
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_ExpInterlockedPopEntrySListFault@0:
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mov ebx, [eax]
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_ExpInterlockedPopEntrySListEnd@0:
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LOCK cmpxchg8b qword ptr [ebp]
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jnz _ExpInterlockedPopEntrySListResume@0
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/* Restore registers and return */
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.l7:
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pop ebp
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pop ebx
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ret
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/*PSINGLE_LIST_ENTRY
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*FASTCALL
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*ExInterlockedPushEntrySList(IN PSINGLE_LIST_ENTRY ListHead,
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* IN PSINGLE_LIST_ENTRY ListEntry,
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* IN PKSPIN_LOCK Lock)
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*/
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PUBLIC @ExInterlockedPushEntrySList@12
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@ExInterlockedPushEntrySList@12:
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/* So we can fall through below */
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pop [esp]
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PUBLIC @InterlockedPushEntrySList@8
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@InterlockedPushEntrySList@8:
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/* Save registers */
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push ebx
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push ebp
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/* Pointer to list */
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mov ebp, ecx
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mov ebx, edx
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/* Get sequence number and link pointer */
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mov edx, [ebp+4]
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mov eax, [ebp]
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.l8:
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/* Set link pointer */
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mov [ebx], eax
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/* Copy sequence number and adjust it */
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lea ecx, [edx + HEX(10001)]
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/* Do the exchange */
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LOCK cmpxchg8b qword ptr [ebp]
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jnz .l8
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/* Restore registers and return */
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pop ebp
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pop ebx
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ret
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/*PSINGLE_LIST_ENTRY
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*FASTCALL
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*ExInterlockedFlushSList(IN PSINGLE_LIST_ENTRY ListHead)
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*/
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PUBLIC @ExInterlockedFlushSList@4
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@ExInterlockedFlushSList@4:
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/* Save registers */
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push ebx
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push ebp
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/* Clear ebx */
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xor ebx, ebx
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/* Pointer to list */
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mov ebp, ecx
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/* Get sequence number and link pointer */
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mov edx, [ebp+4]
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mov eax, [ebp]
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.l9:
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/* Check if the list is empty */
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or eax, eax
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jz .l10
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/* Clear depth and pointer */
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mov ecx, edx
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mov cx, bx
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/* Do the exchange */
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LOCK cmpxchg8b qword ptr [ebp]
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jnz .l9
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/* Restore registers and return */
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.l10:
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pop ebp
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pop ebx
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ret
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END
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/* EOF */
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