s5_machdep.c revision 216320 
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: head/sys/mips/sentry5/s5_machdep.c 216320 2010-12-09 07:47:40Z gonzo $");
29
30#include <sys/param.h>
31#include <machine/cpuregs.h>
32
33#include <mips/sentry5/s5reg.h>
34
35#include "opt_ddb.h"
36
37#include <sys/param.h>
38#include <sys/conf.h>
39#include <sys/kernel.h>
40#include <sys/systm.h>
41#include <sys/imgact.h>
42#include <sys/bio.h>
43#include <sys/buf.h>
44#include <sys/bus.h>
45#include <sys/cpu.h>
46#include <sys/cons.h>
47#include <sys/exec.h>
48#include <sys/ucontext.h>
49#include <sys/proc.h>
50#include <sys/kdb.h>
51#include <sys/ptrace.h>
52#include <sys/reboot.h>
53#include <sys/signalvar.h>
54#include <sys/sysent.h>
55#include <sys/sysproto.h>
56#include <sys/user.h>
57
58#include <vm/vm.h>
59#include <vm/vm_object.h>
60#include <vm/vm_page.h>
61#include <vm/vm_pager.h>
62
63#include <machine/cache.h>
64#include <machine/clock.h>
65#include <machine/cpu.h>
66#include <machine/cpuinfo.h>
67#include <machine/cpufunc.h>
68#include <machine/cpuregs.h>
69#include <machine/hwfunc.h>
70#include <machine/intr_machdep.h>
71#include <machine/locore.h>
72#include <machine/md_var.h>
73#include <machine/pte.h>
74#include <machine/sigframe.h>
75#include <machine/trap.h>
76#include <machine/vmparam.h>
77
78#ifdef CFE
79#include <dev/cfe/cfe_api.h>
80#endif
81
82extern int *edata;
83extern int *end;
84
85void
86platform_cpu_init()
87{
88	/* Nothing special */
89}
90
91static void
92mips_init(void)
93{
94	int i, j;
95
96	printf("entry: mips_init()\n");
97
98#ifdef CFE
99	/*
100	 * Query DRAM memory map from CFE.
101	 */
102	physmem = 0;
103	for (i = 0; i < 10; i += 2) {
104		int result;
105		uint64_t addr, len, type;
106
107		result = cfe_enummem(i, 0, &addr, &len, &type);
108		if (result < 0) {
109			phys_avail[i] = phys_avail[i + 1] = 0;
110			break;
111		}
112		if (type != CFE_MI_AVAILABLE)
113			continue;
114
115		phys_avail[i] = addr;
116		if (i == 0 && addr == 0) {
117			/*
118			 * If this is the first physical memory segment probed
119			 * from CFE, omit the region at the start of physical
120			 * memory where the kernel has been loaded.
121			 */
122			phys_avail[i] += MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
123		}
124		phys_avail[i + 1] = addr + len;
125		physmem += len;
126	}
127
128	realmem = btoc(physmem);
129#endif
130
131	for (j = 0; j < i; j++)
132		dump_avail[j] = phys_avail[j];
133
134	physmem = realmem;
135
136	init_param1();
137	init_param2(physmem);
138	mips_cpu_init();
139	pmap_bootstrap();
140	mips_proc0_init();
141	mutex_init();
142	kdb_init();
143#ifdef KDB
144	if (boothowto & RB_KDB)
145		kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
146#endif
147}
148
149void
150platform_halt(void)
151{
152
153}
154
155
156void
157platform_identify(void)
158{
159
160}
161
162void
163platform_reset(void)
164{
165
166#if defined(CFE)
167	cfe_exit(0, 0);
168#else
169	*((volatile uint8_t *)MIPS_PHYS_TO_KSEG1(SENTRY5_EXTIFADR)) = 0x80;
170#endif
171}
172
173void
174platform_trap_enter(void)
175{
176
177}
178
179void
180platform_trap_exit(void)
181{
182
183}
184
185void
186platform_start(__register_t a0, __register_t a1, __register_t a2,
187	       __register_t a3)
188{
189	vm_offset_t kernend;
190	uint64_t platform_counter_freq;
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#ifdef CFE
202	/*
203	 * Initialize CFE firmware trampolines before
204	 * we initialize the low-level console.
205	 *
206	 * CFE passes the following values in registers:
207	 * a0: firmware handle
208	 * a2: firmware entry point
209	 * a3: entry point seal
210	 */
211	if (a3 == CFE_EPTSEAL)
212		cfe_init(a0, a2);
213#endif
214	cninit();
215
216	mips_init();
217
218# if 0
219	/*
220	 * Probe the Broadcom Sentry5's on-chip PLL clock registers
221	 * and discover the CPU pipeline clock and bus clock
222	 * multipliers from this.
223	 * XXX: Wrong place. You have to ask the ChipCommon
224	 * or External Interface cores on the SiBa.
225	 */
226	uint32_t busmult, cpumult, refclock, clkcfg1;
227#define S5_CLKCFG1_REFCLOCK_MASK	0x0000001F
228#define S5_CLKCFG1_BUSMULT_MASK		0x000003E0
229#define S5_CLKCFG1_BUSMULT_SHIFT	5
230#define S5_CLKCFG1_CPUMULT_MASK		0xFFFFFC00
231#define S5_CLKCFG1_CPUMULT_SHIFT	10
232
233	counter_freq = 100000000;	/* XXX */
234
235	clkcfg1 = s5_rd_clkcfg1();
236	printf("clkcfg1 = 0x%08x\n", clkcfg1);
237
238	refclock = clkcfg1 & 0x1F;
239	busmult = ((clkcfg1 & 0x000003E0) >> 5) + 1;
240	cpumult = ((clkcfg1 & 0xFFFFFC00) >> 10) + 1;
241
242	printf("refclock = %u\n", refclock);
243	printf("busmult = %u\n", busmult);
244	printf("cpumult = %u\n", cpumult);
245
246	counter_freq = cpumult * refclock;
247# else
248	platform_counter_freq = 200 * 1000 * 1000; /* Sentry5 is 200MHz */
249# endif
250
251	mips_timer_init_params(platform_counter_freq, 0);
252}
253