platform.h (2970B) - Raw
1 /*- 2 * Copyright (c) 2014 Andrew Turner 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 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 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #ifndef _MACHINE_PLATFORM_H_ 28 #define _MACHINE_PLATFORM_H_ 29 30 /* 31 * Initialization functions called by the common initarm() function in 32 * arm/machdep.c (but not necessarily from the custom initarm() functions of 33 * older code). 34 * 35 * - platform_probe_and_attach() is called very early, after parsing the boot 36 * params and after physical memory has been located and sized. 37 * 38 * - platform_devmap_init() is called as one of the last steps of early virtual 39 * memory initialization, shortly before the new page tables are installed. 40 * 41 * - platform_lastaddr() is called after platform_devmap_init(), and must return 42 * the address of the first byte of unusable KVA space. This allows a 43 * platform to carve out of the top of the KVA space whatever reserves it 44 * needs for things like static device mapping, and this is called to get the 45 * value before calling pmap_bootstrap() which uses the value to size the 46 * available KVA. 47 * 48 * - platform_gpio_init() is called after the static device mappings are 49 * established and just before cninit(). The intention is that the routine 50 * can do any hardware setup (such as gpio or pinmux) necessary to make the 51 * console functional. 52 * 53 * - platform_late_init() is called just after cninit(). This is the first of 54 * the init routines that can use printf() and expect the output to appear on 55 * a standard console. 56 * 57 */ 58 void platform_probe_and_attach(void); 59 int platform_devmap_init(void); 60 vm_offset_t platform_lastaddr(void); 61 void platform_gpio_init(void); 62 void platform_late_init(void); 63 64 #endif /* _MACHINE_PLATFORM_H_ */