f68f01fa5f
This allows multiple instances of SoCs that use the pl310 driver to be built within the same kernel: * Add access to the platform_t object from outside platform.c * Use this with the pl310 driver There is a new platform_pl310 interface to replace the existing code. SoCs need to implement the init method, and if they have special requirements to write to the two registers we care about will also need to implement the write_ctrl and write_debug methods. Differential Revision: https://reviews.freebsd.org/D11546
125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
/*-
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* Copyright (c) 2005 Peter Grehan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_PLATFORMVAR_H_
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#define _MACHINE_PLATFORMVAR_H_
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/*
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* An ARM platform implementation is declared with a kernel object and
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* an associated method table, similar to a device driver.
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*
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* e.g.
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*
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* static platform_method_t bcm2835_methods[] = {
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* PLATFORMMETHOD(platform_probe, bcm2835_probe),
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* ...
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* PLATFORMMETHOD_END
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* };
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*
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* static platform_def_t bcm3835_platform = {
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* "bcm2835",
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* bcm2835_methods,
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* sizeof(bcm2835_platform_softc), // or 0 if no softc
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* };
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*
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* PLATFORM_DEF(bcm2835_platform);
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*/
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#include <sys/kobj.h>
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#include <sys/linker_set.h>
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struct platform_class {
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KOBJ_CLASS_FIELDS;
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/* How many times to loop to delay approximately 1us */
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int delay_count;
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};
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struct platform_kobj {
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/*
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* A platform instance is a kernel object
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*/
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KOBJ_FIELDS;
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/* Platform class, for access to class specific data */
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struct platform_class *cls;
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};
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typedef struct platform_kobj *platform_t;
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typedef struct platform_class platform_def_t;
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#define platform_method_t kobj_method_t
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#define PLATFORMMETHOD KOBJMETHOD
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#define PLATFORMMETHOD_END KOBJMETHOD_END
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#define PLATFORM_DEF(name) DATA_SET(platform_set, name)
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#ifdef FDT
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struct fdt_platform_class {
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KOBJ_CLASS_FIELDS;
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const char *fdt_compatible;
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};
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typedef struct fdt_platform_class fdt_platform_def_t;
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extern platform_method_t fdt_platform_methods[];
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#define FDT_PLATFORM_DEF2(NAME, VAR_NAME, NAME_STR, size, compatible, \
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delay) \
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CTASSERT(delay > 0); \
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static fdt_platform_def_t VAR_NAME ## _fdt_platform = { \
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.name = NAME_STR, \
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.methods = fdt_platform_methods, \
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.fdt_compatible = compatible, \
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}; \
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static kobj_class_t VAR_NAME ## _baseclasses[] = \
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{ (kobj_class_t)&VAR_NAME ## _fdt_platform, NULL }; \
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static platform_def_t VAR_NAME ## _platform = { \
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NAME_STR, \
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NAME ## _methods, \
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size, \
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VAR_NAME ## _baseclasses, \
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delay, \
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}; \
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DATA_SET(platform_set, VAR_NAME ## _platform)
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#define FDT_PLATFORM_DEF(NAME, NAME_STR, size, compatible, delay) \
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FDT_PLATFORM_DEF2(NAME, NAME, NAME_STR, size, compatible, delay)
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#endif
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/*
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* Helper to get the platform object
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*/
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platform_t platform_obj(void);
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bool arm_tmr_timed_wait(platform_t, int);
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#endif /* _MACHINE_PLATFORMVAR_H_ */
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