sb_machdep.c revision 195333 
1/*-
2 * Copyright (c) 2007 Bruce M. Simpson.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: projects/mips/sys/mips/sibyte/sb_machdep.c 195333 2009-07-04 03:05:48Z imp $");
29
30#include <sys/param.h>
31#include <machine/cpuregs.h>
32
33#include "opt_ddb.h"
34#include "opt_kdb.h"
35
36#include <sys/param.h>
37#include <sys/conf.h>
38#include <sys/kernel.h>
39#include <sys/systm.h>
40#include <sys/imgact.h>
41#include <sys/bio.h>
42#include <sys/buf.h>
43#include <sys/bus.h>
44#include <sys/cpu.h>
45#include <sys/cons.h>
46#include <sys/exec.h>
47#include <sys/ucontext.h>
48#include <sys/proc.h>
49#include <sys/kdb.h>
50#include <sys/ptrace.h>
51#include <sys/reboot.h>
52#include <sys/signalvar.h>
53#include <sys/sysent.h>
54#include <sys/sysproto.h>
55#include <sys/user.h>
56
57#include <vm/vm.h>
58#include <vm/vm_object.h>
59#include <vm/vm_page.h>
60#include <vm/vm_pager.h>
61
62#include <machine/cache.h>
63#include <machine/clock.h>
64#include <machine/cpu.h>
65#include <machine/cpuinfo.h>
66#include <machine/cpufunc.h>
67#include <machine/cpuregs.h>
68#include <machine/hwfunc.h>
69#include <machine/intr_machdep.h>
70#include <machine/locore.h>
71#include <machine/md_var.h>
72#include <machine/pte.h>
73#include <machine/sigframe.h>
74#include <machine/trap.h>
75#include <machine/vmparam.h>
76
77#ifdef CFE
78#include <dev/cfe/cfe_api.h>
79#endif
80
81#include "sb_scd.h"
82
83#ifdef DDB
84#ifndef KDB
85#error KDB must be enabled in order for DDB to work!
86#endif
87#endif
88
89#ifdef CFE
90extern uint32_t cfe_handle;
91extern uint32_t cfe_vector;
92#endif
93
94#ifdef CFE_ENV
95extern void cfe_env_init(void);
96#endif
97
98extern int *edata;
99extern int *end;
100
101static void
102mips_init(void)
103{
104	int i, cfe_mem_idx, tmp;
105	uint64_t maxmem;
106
107#ifdef CFE_ENV
108	cfe_env_init();
109#endif
110
111	TUNABLE_INT_FETCH("boothowto", &boothowto);
112
113	if (boothowto & RB_VERBOSE)
114		bootverbose++;
115
116#ifdef MAXMEM
117	tmp = MAXMEM;
118#else
119	tmp = 0;
120#endif
121	TUNABLE_INT_FETCH("hw.physmem", &tmp);
122	maxmem = (uint64_t)tmp * 1024;
123
124#ifdef CFE
125	/*
126	 * Query DRAM memory map from CFE.
127	 */
128	physmem = 0;
129	cfe_mem_idx = 0;
130	for (i = 0; i < 10; i += 2) {
131		int result;
132		uint64_t addr, len, type;
133
134		result = cfe_enummem(cfe_mem_idx++, 0, &addr, &len, &type);
135		if (result < 0) {
136			phys_avail[i] = phys_avail[i + 1] = 0;
137			break;
138		}
139
140		KASSERT(type == CFE_MI_AVAILABLE,
141			("CFE DRAM region is not available?"));
142
143		if (bootverbose)
144			printf("cfe_enummem: 0x%016jx/%llu.\n", addr, len);
145
146		if (maxmem != 0) {
147			if (addr >= maxmem) {
148				printf("Ignoring %llu bytes of memory at 0x%jx "
149				       "that is above maxmem %dMB\n",
150				       len, addr,
151				       (int)(maxmem / (1024 * 1024)));
152				continue;
153			}
154
155			if (addr + len > maxmem) {
156				printf("Ignoring %llu bytes of memory "
157				       "that is above maxmem %dMB\n",
158				       (addr + len) - maxmem,
159				       (int)(maxmem / (1024 * 1024)));
160				len = maxmem - addr;
161			}
162		}
163
164		phys_avail[i] = addr;
165		if (i == 0 && addr == 0) {
166			/*
167			 * If this is the first physical memory segment probed
168			 * from CFE, omit the region at the start of physical
169			 * memory where the kernel has been loaded.
170			 */
171			phys_avail[i] += MIPS_KSEG0_TO_PHYS((vm_offset_t)&end);
172		}
173		phys_avail[i + 1] = addr + len;
174		physmem += len;
175	}
176
177	realmem = btoc(physmem);
178#endif
179
180	physmem = realmem;
181
182	init_param1();
183	init_param2(physmem);
184	mips_cpu_init();
185	pmap_bootstrap();
186	mips_proc0_init();
187	mutex_init();
188
189	kdb_init();
190#ifdef KDB
191	if (boothowto & RB_KDB)
192		kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
193#endif
194}
195
196void
197platform_halt(void)
198{
199
200}
201
202
203void
204platform_identify(void)
205{
206
207}
208
209void
210platform_reset(void)
211{
212
213	/*
214	 * XXX SMP
215	 * XXX flush data caches
216	 */
217	sb_system_reset();
218}
219
220void
221platform_trap_enter(void)
222{
223
224}
225
226void
227platform_trap_exit(void)
228{
229
230}
231
232void
233platform_start(__register_t a0 __unused, __register_t a1 __unused,
234    __register_t a2 __unused, __register_t a3 __unused)
235{
236	vm_offset_t kernend;
237
238	/* clear the BSS and SBSS segments */
239	memset(&edata, 0, (vm_offset_t)&end - (vm_offset_t)&edata);
240	kernend = round_page((vm_offset_t)&end);
241
242#ifdef CFE
243	/*
244	 * Initialize CFE firmware trampolines before
245	 * we initialize the low-level console.
246	 */
247	if (cfe_handle != 0)
248		cfe_init(cfe_handle, cfe_vector);
249#endif
250	cninit();
251
252#ifdef CFE
253	if (cfe_handle == 0)
254		panic("CFE was not detected by locore.\n");
255#endif
256	mips_init();
257
258	mips_timer_init_params(sb_cpu_speed(), 0);
259}
260