1 /* $NetBSD: sx.c,v 1.8 2023/12/20 05:33:18 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2013 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Michael Lorenz.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: sx.c,v 1.8 2023/12/20 05:33:18 thorpej Exp $");
34
35 #include "locators.h"
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/device.h>
40
41 #include <uvm/uvm_extern.h>
42
43 #include <sys/bus.h>
44 #include <sparc/dev/sbusvar.h>
45 #include <machine/autoconf.h>
46 #include <machine/cpu.h>
47 #include <machine/ctlreg.h>
48 #include <sparc/sparc/asm.h>
49 #include <sparc/dev/sxvar.h>
50 #include <sparc/dev/sxreg.h>
51 #include "opt_sx.h"
52
53 /* autoconfiguration driver */
54 static int sx_match(device_t, struct cfdata *, void *);
55 static void sx_attach(device_t, device_t, void *);
56
57 CFATTACH_DECL_NEW(sx, sizeof(struct sx_softc),
58 sx_match, sx_attach, NULL, NULL);
59
60 static struct sx_softc *sx0 = NULL;
61
62 static int
sx_match(device_t parent,struct cfdata * cf,void * aux)63 sx_match(device_t parent, struct cfdata *cf, void *aux)
64 {
65 struct mainbus_attach_args *ma = aux;
66
67 return (strcmp("SUNW,sx", ma->ma_name) == 0);
68 }
69
70 static void
sx_attach(device_t parent,device_t self,void * aux)71 sx_attach(device_t parent, device_t self, void *aux)
72 {
73 struct sx_softc *sc = device_private(self);
74 struct mainbus_attach_args *ma = aux;
75 uint32_t id;
76 int i;
77 #ifdef SX_DEBUG
78 int j;
79 #endif
80
81 printf("\n");
82
83 sc->sc_dev = self;
84 sc->sc_tag = ma->ma_bustag;
85 sc->sc_uregs = ma->ma_paddr + 0x1000;
86 sc->sc_cnt = 0;
87
88 if (bus_space_map(sc->sc_tag, ma->ma_paddr, 0x1000, 0, &sc->sc_regh)) {
89 aprint_error_dev(self, "failed to map registers\n");
90 return;
91 }
92
93 id = sx_read(sc, SX_ID);
94 aprint_normal_dev(self, "architecture rev. %d chip rev. %d\n",
95 (id & SX_ARCHITECTURE_MASK),
96 (id & SX_CHIP_REVISION) >> 3);
97
98 /* stop the processor */
99 sx_write(sc, SX_CONTROL_STATUS, 0);
100 /* initialize control registers, clear errors etc. */
101 sx_write(sc, SX_R0_INIT, 0);
102 sx_write(sc, SX_ERROR, 0);
103 /* default, to be overridden once cgfourteen takes over */
104 sx_write(sc, SX_PAGE_BOUND_LOWER, 0xfc000000);
105 /* cg14 takes up the whole 64MB chunk */
106 sx_write(sc, SX_PAGE_BOUND_UPPER, 0xffffffff);
107 sx_write(sc, SX_DIAGNOSTICS, SX_DIAG_INIT);
108 sx_write(sc, SX_PLANEMASK, 0xffffffff);
109
110 /*
111 * initialize all other registers
112 * use the direct port since the processor is stopped
113 */
114 for (i = 4; i < 0x200; i += 4)
115 sx_write(sc, SX_DIRECT_R0 + i, 0);
116
117 /* ... and start the processor again */
118 sx_write(sc, SX_CONTROL_STATUS, SX_PB | SX_GO);
119
120 sx0 = sc;
121
122 #ifdef SX_DEBUG
123 sta(0xfc000000, ASI_SX, SX_LD(8, 31, 0));
124 for (i = 1; i < 60; i++)
125 sta(0xfc000000 + (i * 1280), ASI_SX, SX_ST(8, 31, 0));
126 for (i = 900; i < 1000; i++)
127 sta(0xfc000000 + (i * 1280) + 600, ASI_SX, SX_ST(0, 31, 0));
128
129 for (i = 0; i < 0x30; i+= 16) {
130 printf("%08x:", i);
131 for (j = 0; j < 16; j += 4) {
132 if ((i + j) > 0x28) continue;
133 printf(" %08x",
134 bus_space_read_4(sc->sc_tag, sc->sc_regh, i + j));
135 }
136 printf("\n");
137 }
138 printf("registers:\n");
139 for (i = 0x300; i < 0x500; i+= 16) {
140 printf("%08x:", i);
141 for (j = 0; j < 16; j += 4) {
142 printf(" %08x",
143 bus_space_read_4(sc->sc_tag, sc->sc_regh,
144 i + j));
145 }
146 printf("\n");
147 }
148 #endif
149 }
150
151 void
sx_dump(void)152 sx_dump(void)
153 {
154 if (sx0 == NULL)
155 return;
156 printf("SX STATUS: %08x\n",
157 bus_space_read_4(sx0->sc_tag, sx0->sc_regh, SX_CONTROL_STATUS));
158 printf("SX ERROR : %08x\n",
159 bus_space_read_4(sx0->sc_tag, sx0->sc_regh, SX_ERROR));
160 printf("SX DIAG : %08x\n",
161 bus_space_read_4(sx0->sc_tag, sx0->sc_regh, SX_DIAGNOSTICS));
162 }
163