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/**
* @file
*
* @ingroup raspberrypi
*
* @brief mailbox support.
*/
/*
* Copyright (c) 2015 Yang Qiao
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
*
* http://www.rtems.org/license/LICENSE
*
*/
#include <bsp.h>
#include <bsp/vc.h>
#include <string.h>
#define MAX_CMDLINE_LENGTH 1024
static int rpi_cmdline_ready = -1;
static char rpi_cmdline_cached[MAX_CMDLINE_LENGTH] = "force .data placement";
static bcm2835_get_cmdline_entries rpi_cmdline_entries;
const char *rpi_cmdline_get_raw(void)
{
memset(&rpi_cmdline_entries, 0, sizeof(rpi_cmdline_entries));
if (bcm2835_mailbox_get_cmdline(&rpi_cmdline_entries) < 0)
return NULL;
return rpi_cmdline_entries.cmdline;
}
const char *rpi_cmdline_get_cached(void)
{
if (rpi_cmdline_ready <= 0) {
const char *line = rpi_cmdline_get_raw();
if (line != NULL)
strncpy(rpi_cmdline_cached, line, MAX_CMDLINE_LENGTH - 1);
rpi_cmdline_cached[MAX_CMDLINE_LENGTH - 1] = 0;
rpi_cmdline_ready = 1;
}
return rpi_cmdline_cached;
}
const char *rpi_cmdline_get_arg(const char* arg)
{
const char *opt_data;
opt_data = strstr(rpi_cmdline_get_cached(), arg);
if (opt_data)
opt_data += strlen(arg);
return opt_data;
}
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