lpc_machdep.c revision 242531 
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 242531 2012-11-03 22:39:07Z andrew $");
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/frame.h> /* For trapframe_t, used in <machine/machdep.h> */
54#include <machine/machdep.h>
55#include <machine/pmap.h>
56
57#include <arm/lpc/lpcreg.h>
58#include <arm/lpc/lpcvar.h>
59
60#include <dev/fdt/fdt_common.h>
61#include <dev/ic/ns16550.h>
62
63vm_offset_t
64initarm_lastaddr(void)
65{
66
67	if (fdt_immr_addr(LPC_DEV_BASE) != 0)
68		while (1);
69
70	/* Platform-specific initialisation */
71	return (fdt_immr_va - ARM_NOCACHE_KVA_SIZE);
72}
73
74void
75initarm_gpio_init(void)
76{
77
78	/*
79	 * Set initial values of GPIO output ports
80	 */
81	platform_gpio_init();
82}
83
84void
85initarm_late_init(void)
86{
87}
88
89#define FDT_DEVMAP_MAX	(1 + 2 + 1 + 1)
90static struct pmap_devmap fdt_devmap[FDT_DEVMAP_MAX] = {
91	{ 0, 0, 0, 0, 0, }
92};
93
94/*
95 * Construct pmap_devmap[] with DT-derived config data.
96 */
97int
98platform_devmap_init(void)
99{
100
101	/*
102	 * IMMR range.
103	 */
104	fdt_devmap[0].pd_va = fdt_immr_va;
105	fdt_devmap[0].pd_pa = fdt_immr_pa;
106	fdt_devmap[0].pd_size = fdt_immr_size;
107	fdt_devmap[0].pd_prot = VM_PROT_READ | VM_PROT_WRITE;
108	fdt_devmap[0].pd_cache = PTE_NOCACHE;
109
110	pmap_devmap_bootstrap_table = &fdt_devmap[0];
111	return (0);
112}
113
114struct arm32_dma_range *
115bus_dma_get_range(void)
116{
117
118	return (NULL);
119}
120
121int
122bus_dma_get_range_nb(void)
123{
124
125	return (0);
126}
127
128void
129cpu_reset(void)
130{
131	/* Enable WDT */
132	bus_space_write_4(fdtbus_bs_tag,
133	    LPC_CLKPWR_BASE, LPC_CLKPWR_TIMCLK_CTRL,
134	    LPC_CLKPWR_TIMCLK_CTRL_WATCHDOG);
135
136	/* Instant assert of RESETOUT_N with pulse length 1ms */
137	bus_space_write_4(fdtbus_bs_tag, LPC_WDTIM_BASE, LPC_WDTIM_PULSE, 13000);
138	bus_space_write_4(fdtbus_bs_tag, LPC_WDTIM_BASE, LPC_WDTIM_MCTRL, 0x70);
139
140	for (;;);
141}
142
143