xref: /freebsd/sys/arm/annapurna/alpine/alpine_machdep.c (revision bd18fd57db1df29da1a3adf94d47924a977a29c2)
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("$FreeBSD$");
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 
39 #include <vm/vm.h>
40 #include <vm/pmap.h>
41 
42 #include <machine/bus.h>
43 #include <machine/frame.h> /* For trapframe_t, used in <machine/machdep.h> */
44 #include <machine/machdep.h>
45 #include <machine/devmap.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 
54 struct mtx al_dbg_lock;
55 
56 #define	DEVMAP_MAX_VA_ADDRESS		0xF0000000
57 bus_addr_t al_devmap_pa;
58 bus_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 
69 int alpine_get_devmap_base(bus_addr_t *pa, bus_addr_t *size);
70 
71 vm_offset_t
72 platform_lastaddr(void)
73 {
74 
75 	return (DEVMAP_MAX_VA_ADDRESS);
76 }
77 
78 void
79 platform_probe_and_attach(void)
80 {
81 
82 }
83 
84 void
85 platform_gpio_init(void)
86 {
87 
88 }
89 
90 void
91 platform_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  */
127 int
128 platform_devmap_init(void)
129 {
130 	alpine_get_devmap_base(&al_devmap_pa, &al_devmap_size);
131 	arm_devmap_add_entry(al_devmap_pa, al_devmap_size);
132 	return (0);
133 }
134 
135 struct arm32_dma_range *
136 bus_dma_get_range(void)
137 {
138 
139 	return (NULL);
140 }
141 
142 int
143 bus_dma_get_range_nb(void)
144 {
145 
146 	return (0);
147 }
148