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/******************************************************************************
* xc_tbuf.c
*
* API for manipulating and accessing trace buffer parameters
*
* Copyright (c) 2005, Rob Gardner
*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2 of the
* License.
*/
#include "xc_private.h"
static int tbuf_enable(int xc_handle, int enable)
{
DECLARE_DOM0_OP;
op.cmd = DOM0_TBUFCONTROL;
op.interface_version = DOM0_INTERFACE_VERSION;
if (enable)
op.u.tbufcontrol.op = DOM0_TBUF_ENABLE;
else
op.u.tbufcontrol.op = DOM0_TBUF_DISABLE;
return xc_dom0_op(xc_handle, &op);
}
int xc_tbuf_set_size(int xc_handle, unsigned long size)
{
DECLARE_DOM0_OP;
op.cmd = DOM0_TBUFCONTROL;
op.interface_version = DOM0_INTERFACE_VERSION;
op.u.tbufcontrol.op = DOM0_TBUF_SET_SIZE;
op.u.tbufcontrol.size = size;
return xc_dom0_op(xc_handle, &op);
}
int xc_tbuf_get_size(int xc_handle, unsigned long *size)
{
int rc;
DECLARE_DOM0_OP;
op.cmd = DOM0_TBUFCONTROL;
op.interface_version = DOM0_INTERFACE_VERSION;
op.u.tbufcontrol.op = DOM0_TBUF_GET_INFO;
rc = xc_dom0_op(xc_handle, &op);
if (rc == 0)
*size = op.u.tbufcontrol.size;
return rc;
}
int xc_tbuf_enable(int xc_handle, size_t cnt, unsigned long *mfn,
unsigned long *size)
{
DECLARE_DOM0_OP;
int rc;
/*
* Ignore errors (at least for now) as we get an error if size is already
* set (since trace buffers cannot be reallocated). If we really have no
* buffers at all then tbuf_enable() will fail, so this is safe.
*/
(void)xc_tbuf_set_size(xc_handle, cnt);
if ( tbuf_enable(xc_handle, 1) != 0 )
return -1;
op.cmd = DOM0_TBUFCONTROL;
op.interface_version = DOM0_INTERFACE_VERSION;
op.u.tbufcontrol.op = DOM0_TBUF_GET_INFO;
rc = xc_dom0_op(xc_handle, &op);
if ( rc == 0 )
{
*size = op.u.tbufcontrol.size;
*mfn = op.u.tbufcontrol.buffer_mfn;
}
return 0;
}
int xc_tbuf_disable(int xc_handle)
{
return tbuf_enable(xc_handle, 0);
}
int xc_tbuf_set_cpu_mask(int xc_handle, uint32_t mask)
{
DECLARE_DOM0_OP;
op.cmd = DOM0_TBUFCONTROL;
op.interface_version = DOM0_INTERFACE_VERSION;
op.u.tbufcontrol.op = DOM0_TBUF_SET_CPU_MASK;
op.u.tbufcontrol.cpu_mask = mask;
return do_dom0_op(xc_handle, &op);
}
int xc_tbuf_set_evt_mask(int xc_handle, uint32_t mask)
{
DECLARE_DOM0_OP;
op.cmd = DOM0_TBUFCONTROL;
op.interface_version = DOM0_INTERFACE_VERSION;
op.u.tbufcontrol.op = DOM0_TBUF_SET_EVT_MASK;
op.u.tbufcontrol.evt_mask = mask;
return do_dom0_op(xc_handle, &op);
}
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