2 * Copyright (c) 2014 Andrew Turner
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #ifndef _MACHINE_PLATFORM_H_
30 #define _MACHINE_PLATFORM_H_
33 * Initialization functions called by the common initarm() function in
34 * arm/machdep.c (but not necessarily from the custom initarm() functions of
37 * - platform_probe_and_attach() is called very early, after parsing the boot
38 * params and after physical memory has been located and sized.
40 * - platform_devmap_init() is called as one of the last steps of early virtual
41 * memory initialization, shortly before the new page tables are installed.
43 * - platform_lastaddr() is called after platform_devmap_init(), and must return
44 * the address of the first byte of unusable KVA space. This allows a
45 * platform to carve out of the top of the KVA space whatever reserves it
46 * needs for things like static device mapping, and this is called to get the
47 * value before calling pmap_bootstrap() which uses the value to size the
50 * - platform_gpio_init() is called after the static device mappings are
51 * established and just before cninit(). The intention is that the routine
52 * can do any hardware setup (such as gpio or pinmux) necessary to make the
55 * - platform_late_init() is called just after cninit(). This is the first of
56 * the init routines that can use printf() and expect the output to appear on
60 void platform_probe_and_attach(void);
61 int platform_devmap_init(void);
62 vm_offset_t platform_lastaddr(void);
63 void platform_gpio_init(void);
64 void platform_late_init(void);
66 #endif /* _MACHINE_PLATFORM_H_ */