alpine_machdep.c revision 298627 
1/*-
2 * Copyright (c) 2013 Ruslan Bukin <br@bsdpad.com>
3 * Copyright (c) 2015 Semihalf
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: head/sys/arm/annapurna/alpine/alpine_machdep.c 298627 2016-04-26 11:53:37Z br $");
31
32#define _ARM32_BUS_DMA_PRIVATE
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/bus.h>
36#include <sys/lock.h>
37#include <sys/mutex.h>
38#include <sys/devmap.h>
39
40#include <vm/vm.h>
41#include <vm/pmap.h>
42
43#include <machine/bus.h>
44#include <machine/frame.h> /* For trapframe_t, used in <machine/machdep.h> */
45#include <machine/machdep.h>
46#include <machine/platform.h>
47#include <machine/fdt.h>
48
49#include <dev/fdt/fdt_common.h>
50
51#include "opt_ddb.h"
52#include "opt_platform.h"
53
54struct mtx al_dbg_lock;
55
56#define	DEVMAP_MAX_VA_ADDRESS		0xF0000000
57bus_addr_t al_devmap_pa;
58bus_addr_t al_devmap_size;
59
60#define	AL_NB_SERVICE_OFFSET		0x70000
61#define	AL_NB_CCU_OFFSET			0x90000
62#define	AL_CCU_SNOOP_CONTROL_IOFAB_0_OFFSET	0x4000
63#define	AL_CCU_SNOOP_CONTROL_IOFAB_1_OFFSET	0x5000
64#define	AL_CCU_SPECULATION_CONTROL_OFFSET	0x4
65
66#define	AL_NB_ACF_MISC_OFFSET			0xD0
67#define	AL_NB_ACF_MISC_READ_BYPASS 		(1 << 30)
68
69int alpine_get_devmap_base(bus_addr_t *pa, bus_addr_t *size);
70
71vm_offset_t
72platform_lastaddr(void)
73{
74
75	return (DEVMAP_MAX_VA_ADDRESS);
76}
77
78void
79platform_probe_and_attach(void)
80{
81
82}
83
84void
85platform_gpio_init(void)
86{
87
88}
89
90void
91platform_late_init(void)
92{
93	bus_addr_t reg_baddr;
94	uint32_t val;
95
96	if (!mtx_initialized(&al_dbg_lock))
97		mtx_init(&al_dbg_lock, "ALDBG", "ALDBG", MTX_SPIN);
98
99	/* configure system fabric */
100	if (bus_space_map(fdtbus_bs_tag, al_devmap_pa, al_devmap_size, 0,
101	    &reg_baddr))
102		panic("Couldn't map Register Space area");
103
104	/* do not allow reads to bypass writes to different addresses */
105	val = bus_space_read_4(fdtbus_bs_tag, reg_baddr,
106	    AL_NB_SERVICE_OFFSET + AL_NB_ACF_MISC_OFFSET);
107	val &= ~AL_NB_ACF_MISC_READ_BYPASS;
108	bus_space_write_4(fdtbus_bs_tag, reg_baddr,
109	    AL_NB_SERVICE_OFFSET + AL_NB_ACF_MISC_OFFSET, val);
110
111	/* enable cache snoop */
112	bus_space_write_4(fdtbus_bs_tag, reg_baddr,
113	    AL_NB_CCU_OFFSET + AL_CCU_SNOOP_CONTROL_IOFAB_0_OFFSET, 1);
114	bus_space_write_4(fdtbus_bs_tag, reg_baddr,
115	    AL_NB_CCU_OFFSET + AL_CCU_SNOOP_CONTROL_IOFAB_1_OFFSET, 1);
116
117	/* disable speculative fetches from masters */
118	bus_space_write_4(fdtbus_bs_tag, reg_baddr,
119	    AL_NB_CCU_OFFSET + AL_CCU_SPECULATION_CONTROL_OFFSET, 7);
120
121	bus_space_unmap(fdtbus_bs_tag, reg_baddr, al_devmap_size);
122}
123
124/*
125 * Construct devmap table with DT-derived config data.
126 */
127int
128platform_devmap_init(void)
129{
130	alpine_get_devmap_base(&al_devmap_pa, &al_devmap_size);
131	devmap_add_entry(al_devmap_pa, al_devmap_size);
132	return (0);
133}
134
135struct arm32_dma_range *
136bus_dma_get_range(void)
137{
138
139	return (NULL);
140}
141
142int
143bus_dma_get_range_nb(void)
144{
145
146	return (0);
147}
148