/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 * Copyright (c) 2002-2006 Neterion, Inc.
 */

#ifndef XGE_OS_PAL_H
#define XGE_OS_PAL_H

#include "xge-defs.h"

__EXTERN_BEGIN_DECLS

/*--------------------------- platform switch ------------------------------*/

/* platform specific header */
#include "xge_osdep.h"

#if !defined(XGE_OS_PLATFORM_64BIT) && !defined(XGE_OS_PLATFORM_32BIT)
#error "either 32bit or 64bit switch must be defined!"
#endif

#if !defined(XGE_OS_HOST_BIG_ENDIAN) && !defined(XGE_OS_HOST_LITTLE_ENDIAN)
#error "either little endian or big endian switch must be defined!"
#endif

#if defined(XGE_OS_PLATFORM_64BIT)
#define XGE_OS_MEMORY_DEADCODE_PAT      0x5a5a5a5a5a5a5a5a
#else
#define XGE_OS_MEMORY_DEADCODE_PAT      0x5a5a5a5a
#endif

#define XGE_OS_TRACE_MSGBUF_MAX         512
typedef struct xge_os_tracebuf_t {
        int             wrapped_once;     /* circular buffer been wrapped */
        int             timestamp;        /* whether timestamps are enabled */
        volatile int    offset;           /* offset within the tracebuf */
        int             size;             /* total size of trace buffer */
        char            msg[XGE_OS_TRACE_MSGBUF_MAX]; /* each individual buffer */
        int             msgbuf_max;       /* actual size of msg buffer */
        char            *data;            /* pointer to data buffer */
} xge_os_tracebuf_t;
extern xge_os_tracebuf_t *g_xge_os_tracebuf;

#ifdef XGE_TRACE_INTO_CIRCULAR_ARR
extern xge_os_tracebuf_t *g_xge_os_tracebuf;
extern char *dmesg_start;

/* Calculate the size of the msg and copy it into the global buffer */
#define __xge_trace(tb) { \
        int msgsize = xge_os_strlen(tb->msg) + 2; \
        int offset = tb->offset; \
        if (msgsize != 2 && msgsize < tb->msgbuf_max) { \
                int leftsize =  tb->size - offset; \
                if ((msgsize + tb->msgbuf_max) > leftsize) { \
                        xge_os_memzero(tb->data + offset, leftsize); \
                        offset = 0; \
                        tb->wrapped_once = 1; \
                } \
                xge_os_memcpy(tb->data + offset, tb->msg, msgsize-1); \
                *(tb->data + offset + msgsize-1) = '\n'; \
                *(tb->data + offset + msgsize) = 0; \
                offset += msgsize; \
                tb->offset = offset; \
                dmesg_start = tb->data + offset; \
                *tb->msg = 0; \
        } \
}

#define xge_os_vatrace(tb, fmt) { \
        if (tb != NULL) { \
                char *_p = tb->msg; \
                if (tb->timestamp) { \
                        xge_os_timestamp(tb->msg); \
                        _p = tb->msg + xge_os_strlen(tb->msg); \
                } \
                xge_os_vasprintf(_p, fmt); \
                __xge_trace(tb); \
        } \
}

#ifdef __GNUC__
#define xge_os_trace(tb, fmt...) { \
        int msgsize = xge_os_strlen(tb->msg); \
        if (tb != NULL) { \
                if (tb->timestamp) { \
                        xge_os_timestamp(tb->msg); \
                } \
                xge_os_snprintf(tb->msg + msgsize, \
                    (sizeof(tb->msg) - msgsize)), \
                    fmt); \
                __xge_trace(tb); \
        } \
}
#endif /* __GNUC__ */

#else
#define xge_os_vatrace(tb, fmt)
#ifdef __GNUC__
#define xge_os_trace(tb, fmt...)
#endif /* __GNUC__ */
#endif

__EXTERN_END_DECLS

#endif /* XGE_OS_PAL_H */