xref: /freebsd/sys/arm/arm/platform_if.m (revision 031beb4e)

#-
# Copyright (c) 2009 Nathan Whitehorn
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
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#

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/devmap.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/smp.h>

#include <machine/machdep.h>
#include <machine/platform.h>
#include <machine/platformvar.h>
#include <machine/smp.h>
#include <machine/vmparam.h>

/**
 * @defgroup PLATFORM platform - KObj methods for ARM platform
 * implementations
 * @brief A set of methods required by all platform implementations.
 * These are used to bring up secondary CPUs, supply the physical memory
 * map, etc.
 *@{
 */

INTERFACE platform;

#
# Default implementations
#
CODE {
	static void platform_null_attach(platform_t plat)
	{
		return;
	}

	static vm_offset_t platform_default_lastaddr(platform_t plat)
	{
		return (devmap_lastaddr());
	}

	static void platform_default_mp_setmaxid(platform_t plat)
	{
		mp_ncpus = 1;
		mp_maxid = 0;
	}
};

/**
 * @brief Probe for whether we are on this platform, returning the standard
 * newbus probe codes. If we have Open Firmware or a flattened device tree,
 * it is guaranteed to be available at this point.
 */
METHOD int probe {
	platform_t	_plat;
};

/**
 * @brief Attach this platform module. This happens before the MMU is online,
 * so the platform module can install its own high-priority MMU module at
 * this point.
 */
METHOD int attach {
	platform_t	_plat;
} DEFAULT platform_null_attach;

/**
 * @brief Called as one of the last steps of early virtual memory
 * initialization, shortly before the new page tables are installed.
 */
METHOD int devmap_init {
	platform_t	_plat;
};

/**
 * @brief Called after devmap_init(), and must return the address of the
 * first byte of unusable KVA space.  This allows a platform to carve out
 * of the top of the KVA space whatever reserves it needs for things like
 * static device mapping, and this is called to get the value before
 * calling pmap_bootstrap() which uses the value to size the available KVA.
 */
METHOD vm_offset_t lastaddr {
	platform_t	_plat;
} DEFAULT platform_default_lastaddr;

/**
 * @brief Called after the static device mappings are established and just
 * before cninit(). The intention is that the routine can do any hardware
 * setup (such as gpio or pinmux) necessary to make the console functional.
 */
METHOD void gpio_init {
	platform_t	_plat;
};

/**
 * @brief Called just after cninit(). This is the first of the init
 * routines that can use printf() and expect the output to appear on
 * a standard console.
 */
METHOD void late_init {
	platform_t	_plat;
};

/**
 * @brief Called by cpu_mp_setmaxid() to set mp_maxid and mp_ncpus.
 */
METHOD void mp_setmaxid {
	platform_t	_plat;
} DEFAULT platform_default_mp_setmaxid;

/**
 * @brief Called by cpu_mp_start to start the secondary processors.
 */
METHOD void mp_start_ap {
	platform_t	_plat;
};

/**
 * @brief Called by cpu_reset to reboot.
 */
METHOD void cpu_reset {
	platform_t	_plat;
};