lpc_machdep.c revision 257200 
1/*-
2 * Copyright (c) 1994-1998 Mark Brinicombe.
3 * Copyright (c) 1994 Brini.
4 * All rights reserved.
5 *
6 * This code is derived from software written for Brini by Mark Brinicombe
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *      This product includes software developed by Brini.
19 * 4. The name of the company nor the name of the author may be used to
20 *    endorse or promote products derived from this software without specific
21 *    prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * from: FreeBSD: //depot/projects/arm/src/sys/arm/at91/kb920x_machdep.c, rev 45
36 */
37
38#include "opt_ddb.h"
39#include "opt_platform.h"
40
41#include <sys/cdefs.h>
42__FBSDID("$FreeBSD: head/sys/arm/lpc/lpc_machdep.c 257200 2013-10-27 01:34:10Z ian $");
43
44#define _ARM32_BUS_DMA_PRIVATE
45#include <sys/param.h>
46#include <sys/systm.h>
47#include <sys/bus.h>
48
49#include <vm/vm.h>
50#include <vm/pmap.h>
51
52#include <machine/bus.h>
53#include <machine/machdep.h>
54
55#include <arm/lpc/lpcreg.h>
56#include <arm/lpc/lpcvar.h>
57
58#include <dev/fdt/fdt_common.h>
59#include <dev/ic/ns16550.h>
60
61vm_offset_t
62initarm_lastaddr(void)
63{
64
65	if (fdt_immr_addr(LPC_DEV_BASE) != 0)
66		while (1);
67
68	/* Platform-specific initialisation */
69	return (fdt_immr_va - ARM_NOCACHE_KVA_SIZE);
70}
71
72void
73initarm_gpio_init(void)
74{
75
76	/*
77	 * Set initial values of GPIO output ports
78	 */
79	platform_gpio_init();
80}
81
82void
83initarm_late_init(void)
84{
85}
86
87#define FDT_DEVMAP_MAX	(1 + 2 + 1 + 1)
88static struct pmap_devmap fdt_devmap[FDT_DEVMAP_MAX] = {
89	{ 0, 0, 0, 0, 0, }
90};
91
92/*
93 * Construct pmap_devmap[] with DT-derived config data.
94 */
95int
96platform_devmap_init(void)
97{
98
99	/*
100	 * IMMR range.
101	 */
102	fdt_devmap[0].pd_va = fdt_immr_va;
103	fdt_devmap[0].pd_pa = fdt_immr_pa;
104	fdt_devmap[0].pd_size = fdt_immr_size;
105	fdt_devmap[0].pd_prot = VM_PROT_READ | VM_PROT_WRITE;
106	fdt_devmap[0].pd_cache = PTE_NOCACHE;
107
108	pmap_devmap_bootstrap_table = &fdt_devmap[0];
109	return (0);
110}
111
112struct arm32_dma_range *
113bus_dma_get_range(void)
114{
115
116	return (NULL);
117}
118
119int
120bus_dma_get_range_nb(void)
121{
122
123	return (0);
124}
125
126void
127cpu_reset(void)
128{
129	/* Enable WDT */
130	bus_space_write_4(fdtbus_bs_tag,
131	    LPC_CLKPWR_BASE, LPC_CLKPWR_TIMCLK_CTRL,
132	    LPC_CLKPWR_TIMCLK_CTRL_WATCHDOG);
133
134	/* Instant assert of RESETOUT_N with pulse length 1ms */
135	bus_space_write_4(fdtbus_bs_tag, LPC_WDTIM_BASE, LPC_WDTIM_PULSE, 13000);
136	bus_space_write_4(fdtbus_bs_tag, LPC_WDTIM_BASE, LPC_WDTIM_MCTRL, 0x70);
137
138	for (;;);
139}
140
141