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#if defined(JAZZ)
/*++
Copyright (c) 1991 Microsoft Corporation
Module Name:
jxvendor.c
Abstract:
Implementation of the vendor private routines for the Jazz ARC firmware.
Author:
David M. Robinson (davidro) 13-June-1991
Revision History:
--*/
#include "fwp.h"
//
// Routine prototypes.
//
PVOID
FwAllocatePool(
IN ULONG NumberOfBytes
);
VOID
FwStallExecution (
IN ULONG MicroSeconds
);
//
// Static Variables
//
PCHAR FwPoolBase;
PCHAR FwFreePool;
VOID
FwVendorInitialize(
VOID
)
/*++
Routine Description:
This routine initializes the vendor private routines.
Arguments:
None.
Return Value:
None.
--*/
{
//
// Initialize pointers and zero memory for the allocate pool routine.
//
FwPoolBase = (PCHAR)FW_POOL_BASE;
FwFreePool = (PCHAR)FW_POOL_BASE;
RtlZeroMemory(FwPoolBase, FW_POOL_SIZE);
//
// Initialize the vendor routine vector.
//
(PVEN_ALLOCATE_POOL_ROUTINE)SYSTEM_BLOCK->VendorVector[AllocatePoolRoutine] =
FwAllocatePool;
(PVEN_STALL_EXECUTION_ROUTINE)SYSTEM_BLOCK->VendorVector[StallExecutionRoutine] =
FwStallExecution;
(PVEN_PRINT_ROUTINE)SYSTEM_BLOCK->VendorVector[PrintRoutine] =
FwPrint;
return;
}
PVOID
FwAllocatePool(
IN ULONG NumberOfBytes
)
/*++
Routine Description:
This routine allocates the requested number of bytes from the firmware
pool. If enough pool exists to satisfy the request, a pointer to the
next free cache-aligned block is returned, otherwise NULL is returned.
The pool is zeroed at initialization time, and no corresponding
"FwFreePool" routine exists.
Arguments:
NumberOfBytes - Supplies the number of bytes to allocate.
Return Value:
NULL - Not enough pool exists to satisfy the request.
NON-NULL - Returns a pointer to the allocated pool.
--*/
{
PVOID Pool;
//
// If there is not enough free pool for this request or the requested
// number of bytes is zero, return NULL, otherwise return a pointer to
// the free block and update the free pointer.
//
if (((FwFreePool + NumberOfBytes) > (FwPoolBase + FW_POOL_SIZE)) ||
(NumberOfBytes == 0)) {
Pool = NULL;
} else {
Pool = FwFreePool;
//
// Move pointer to the next cache aligned section of free pool.
//
FwFreePool += ((NumberOfBytes - 1) & ~(KeGetDcacheFillSize() - 1)) +
KeGetDcacheFillSize();
}
return Pool;
}
VOID
FwStallExecution (
IN ULONG MicroSeconds
)
/*++
Routine Description:
This function stalls execution for the specified number of microseconds.
Arguments:
MicroSeconds - Supplies the number of microseconds that execution is to be
stalled.
Return Value:
None.
--*/
{
ULONG Index;
ULONG Limit;
PULONG Store;
ULONG Value;
//
// ****** begin temporary code ******
//
// This code must be replaced with a smarter version. For now it assumes
// an execution rate of 50,000,000 instructions per second and 4 instructions
// per iteration.
//
Store = &Value;
Limit = (MicroSeconds * 50 / 4);
for (Index = 0; Index < Limit; Index += 1) {
*Store = Index;
}
return;
}
#endif
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