1 /*-
2 * Copyright (c) 2007 Bruce M. Simpson.
3 * Copyright (c) 2016 Michael Zhilin <mizhka@gmail.com>
4 *
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/11.1/sys/mips/broadcom/bcm_machdep.c 302190 2016-06-25 04:34:54Z landonf $");
31
32 #include "opt_ddb.h"
33
34 #include <sys/param.h>
35 #include <sys/conf.h>
36 #include <sys/kernel.h>
37 #include <sys/systm.h>
38 #include <sys/imgact.h>
39 #include <sys/bio.h>
40 #include <sys/buf.h>
41 #include <sys/bus.h>
42 #include <sys/cpu.h>
43 #include <sys/cons.h>
44 #include <sys/exec.h>
45 #include <sys/ucontext.h>
46 #include <sys/proc.h>
47 #include <sys/kdb.h>
48 #include <sys/ptrace.h>
49 #include <sys/reboot.h>
50 #include <sys/signalvar.h>
51 #include <sys/sysent.h>
52 #include <sys/sysproto.h>
53 #include <sys/user.h>
54
55 #include <vm/vm.h>
56 #include <vm/vm_object.h>
57 #include <vm/vm_page.h>
58
59 #include <machine/cache.h>
60 #include <machine/clock.h>
61 #include <machine/cpu.h>
62 #include <machine/cpuinfo.h>
63 #include <machine/cpufunc.h>
64 #include <machine/cpuregs.h>
65 #include <machine/hwfunc.h>
66 #include <machine/intr_machdep.h>
67 #include <machine/locore.h>
68 #include <machine/md_var.h>
69 #include <machine/pte.h>
70 #include <machine/sigframe.h>
71 #include <machine/trap.h>
72 #include <machine/vmparam.h>
73
74 #include "bcm_socinfo.h"
75
76 #ifdef CFE
77 #include <dev/cfe/cfe_api.h>
78 #endif
79
80 #if 0
81 #define BCM_TRACE(_fmt, ...) printf(_fmt, ##__VA_ARGS__)
82 #else
83 #define BCM_TRACE(_fmt, ...)
84 #endif
85
86 extern int *edata;
87 extern int *end;
88
89 void
90 platform_cpu_init()
91 {
92 /* Nothing special */
93 }
94
95 static void
96 mips_init(void)
97 {
98 int i, j;
99
100 printf("entry: mips_init()\n");
101
102 #ifdef CFE
103 /*
104 * Query DRAM memory map from CFE.
105 */
106 physmem = 0;
107 for (i = 0; i < 10; i += 2) {
108 int result;
109 uint64_t addr, len, type;
110
111 result = cfe_enummem(i / 2, 0, &addr, &len, &type);
112 if (result < 0) {
113 BCM_TRACE("There is no phys memory for: %d\n", i);
114 phys_avail[i] = phys_avail[i + 1] = 0;
115 break;
116 }
117 if (type != CFE_MI_AVAILABLE) {
118 BCM_TRACE("phys memory is not available: %d\n", i);
119 continue;
120 }
121
122 phys_avail[i] = addr;
123 if (i == 0 && addr == 0) {
124 /*
125 * If this is the first physical memory segment probed
126 * from CFE, omit the region at the start of physical
127 * memory where the kernel has been loaded.
128 */
129 phys_avail[i] += MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
130 }
131
132 BCM_TRACE("phys memory is available for: %d\n", i);
133 BCM_TRACE(" => addr = %jx\n", addr);
134 BCM_TRACE(" => len = %jd\n", len);
135
136 phys_avail[i + 1] = addr + len;
137 physmem += len;
138 }
139
140 BCM_TRACE("Total phys memory is : %ld\n", physmem);
141 realmem = btoc(physmem);
142 #endif
143
144 for (j = 0; j < i; j++)
145 dump_avail[j] = phys_avail[j];
146
147 physmem = realmem;
148
149 init_param1();
150 init_param2(physmem);
151 mips_cpu_init();
152 pmap_bootstrap();
153 mips_proc0_init();
154 mutex_init();
155 kdb_init();
156 #ifdef KDB
157 if (boothowto & RB_KDB)
158 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
159 #endif
160 }
161
162 void
163 platform_reset(void)
164 {
165 printf("bcm::platform_reset()\n");
166 intr_disable();
167
168 #if defined(CFE)
169 cfe_exit(0, 0);
170 #else
171 /* PMU watchdog reset */
172 BCM_WRITE_REG32(BCM_REG_CHIPC_PMUWD_OFFS, 2); /* PMU watchdog */
173 #endif
174
175 #if 0
176 /* Non-PMU reset
177 * XXX: Need chipc capability flags */
178 *((volatile uint8_t *)MIPS_PHYS_TO_KSEG1(SENTRY5_EXTIFADR)) = 0x80;
179 #endif
180
181 for (;;);
182 }
183
184 void
185 platform_start(__register_t a0, __register_t a1, __register_t a2,
186 __register_t a3)
187 {
188 vm_offset_t kernend;
189 uint64_t platform_counter_freq;
190 struct bcm_socinfo *socinfo;
191
192 /* clear the BSS and SBSS segments */
193 kernend = (vm_offset_t)&end;
194 memset(&edata, 0, kernend - (vm_offset_t)(&edata));
195
196 mips_postboot_fixup();
197
198 /* Initialize pcpu stuff */
199 mips_pcpu0_init();
200
201 #if 0
202 /*
203 * Probe the Broadcom on-chip PLL clock registers
204 * and discover the CPU pipeline clock and bus clock
205 * multipliers from this.
206 * XXX: Wrong place. You have to ask the ChipCommon
207 * or External Interface cores on the SiBa.
208 */
209 uint32_t busmult, cpumult, refclock, clkcfg1;
210 #define S5_CLKCFG1_REFCLOCK_MASK 0x0000001F
211 #define S5_CLKCFG1_BUSMULT_MASK 0x000003E0
212 #define S5_CLKCFG1_BUSMULT_SHIFT 5
213 #define S5_CLKCFG1_CPUMULT_MASK 0xFFFFFC00
214 #define S5_CLKCFG1_CPUMULT_SHIFT 10
215
216 counter_freq = 100000000; /* XXX */
217
218 clkcfg1 = s5_rd_clkcfg1();
219 printf("clkcfg1 = 0x%08x\n", clkcfg1);
220
221 refclock = clkcfg1 & 0x1F;
222 busmult = ((clkcfg1 & 0x000003E0) >> 5) + 1;
223 cpumult = ((clkcfg1 & 0xFFFFFC00) >> 10) + 1;
224
225 printf("refclock = %u\n", refclock);
226 printf("busmult = %u\n", busmult);
227 printf("cpumult = %u\n", cpumult);
228
229 counter_freq = cpumult * refclock;
230 #endif
231
232 socinfo = bcm_get_socinfo();
233 platform_counter_freq = socinfo->cpurate * 1000 * 1000; /* BCM4718 is 480MHz */
234
235 mips_timer_early_init(platform_counter_freq);
236
237 #ifdef CFE
238 /*
239 * Initialize CFE firmware trampolines before
240 * we initialize the low-level console.
241 *
242 * CFE passes the following values in registers:
243 * a0: firmware handle
244 * a2: firmware entry point
245 * a3: entry point seal
246 */
247 if (a3 == CFE_EPTSEAL)
248 cfe_init(a0, a2);
249 #endif
250
251 cninit();
252
253 mips_init();
254
255 mips_timer_init_params(platform_counter_freq, socinfo->double_count);
256 }
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