sb_machdep.c revision 198669 
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 198669 2009-10-30 08:53:11Z rrs $");
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
101void
102platform_cpu_init()
103{
104	/* Nothing special */
105}
106
107static void
108mips_init(void)
109{
110	int i, cfe_mem_idx, tmp;
111	uint64_t maxmem;
112
113#ifdef CFE_ENV
114	cfe_env_init();
115#endif
116
117	TUNABLE_INT_FETCH("boothowto", &boothowto);
118
119	if (boothowto & RB_VERBOSE)
120		bootverbose++;
121
122#ifdef MAXMEM
123	tmp = MAXMEM;
124#else
125	tmp = 0;
126#endif
127	TUNABLE_INT_FETCH("hw.physmem", &tmp);
128	maxmem = (uint64_t)tmp * 1024;
129
130#ifdef CFE
131	/*
132	 * Query DRAM memory map from CFE.
133	 */
134	physmem = 0;
135	cfe_mem_idx = 0;
136	for (i = 0; i < 10; i += 2) {
137		int result;
138		uint64_t addr, len, type;
139
140		result = cfe_enummem(cfe_mem_idx++, 0, &addr, &len, &type);
141		if (result < 0) {
142			phys_avail[i] = phys_avail[i + 1] = 0;
143			break;
144		}
145
146		KASSERT(type == CFE_MI_AVAILABLE,
147			("CFE DRAM region is not available?"));
148
149		if (bootverbose)
150			printf("cfe_enummem: 0x%016jx/%llu.\n", addr, len);
151
152		if (maxmem != 0) {
153			if (addr >= maxmem) {
154				printf("Ignoring %llu bytes of memory at 0x%jx "
155				       "that is above maxmem %dMB\n",
156				       len, addr,
157				       (int)(maxmem / (1024 * 1024)));
158				continue;
159			}
160
161			if (addr + len > maxmem) {
162				printf("Ignoring %llu bytes of memory "
163				       "that is above maxmem %dMB\n",
164				       (addr + len) - maxmem,
165				       (int)(maxmem / (1024 * 1024)));
166				len = maxmem - addr;
167			}
168		}
169
170		phys_avail[i] = addr;
171		if (i == 0 && addr == 0) {
172			/*
173			 * If this is the first physical memory segment probed
174			 * from CFE, omit the region at the start of physical
175			 * memory where the kernel has been loaded.
176			 */
177			phys_avail[i] += MIPS_KSEG0_TO_PHYS((vm_offset_t)&end);
178		}
179		phys_avail[i + 1] = addr + len;
180		physmem += len;
181	}
182
183	realmem = btoc(physmem);
184#endif
185
186	physmem = realmem;
187
188	init_param1();
189	init_param2(physmem);
190	mips_cpu_init();
191	pmap_bootstrap();
192	mips_proc0_init();
193	mutex_init();
194
195	kdb_init();
196#ifdef KDB
197	if (boothowto & RB_KDB)
198		kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
199#endif
200}
201
202void
203platform_halt(void)
204{
205
206}
207
208
209void
210platform_identify(void)
211{
212
213}
214
215void
216platform_reset(void)
217{
218
219	/*
220	 * XXX SMP
221	 * XXX flush data caches
222	 */
223	sb_system_reset();
224}
225
226void
227platform_trap_enter(void)
228{
229
230}
231
232void
233platform_trap_exit(void)
234{
235
236}
237
238void
239platform_start(__register_t a0 __unused, __register_t a1 __unused,
240    __register_t a2 __unused, __register_t a3 __unused)
241{
242	vm_offset_t kernend;
243
244	/* clear the BSS and SBSS segments */
245	memset(&edata, 0, (vm_offset_t)&end - (vm_offset_t)&edata);
246	kernend = round_page((vm_offset_t)&end);
247
248#ifdef CFE
249	/*
250	 * Initialize CFE firmware trampolines before
251	 * we initialize the low-level console.
252	 */
253	if (cfe_handle != 0)
254		cfe_init(cfe_handle, cfe_vector);
255#endif
256	cninit();
257
258#ifdef CFE
259	if (cfe_handle == 0)
260		panic("CFE was not detected by locore.\n");
261#endif
262	mips_init();
263
264	mips_timer_init_params(sb_cpu_speed(), 0);
265}
266