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("$FreeBSD$");
29
30#include "opt_ddb.h"
31
32#include <sys/param.h>
33#include <sys/conf.h>
34#include <sys/kernel.h>
35#include <sys/systm.h>
36#include <sys/imgact.h>
37#include <sys/bio.h>
38#include <sys/buf.h>
39#include <sys/bus.h>
40#include <sys/cpu.h>
41#include <sys/cons.h>
42#include <sys/exec.h>
43#include <sys/ucontext.h>
44#include <sys/proc.h>
45#include <sys/kdb.h>
46#include <sys/ptrace.h>
47#include <sys/reboot.h>
48#include <sys/signalvar.h>
49#include <sys/sysent.h>
50#include <sys/sysproto.h>
51#include <sys/user.h>
52
53#include <vm/vm.h>
54#include <vm/vm_object.h>
55#include <vm/vm_page.h>
56
57#include <machine/cache.h>
58#include <machine/clock.h>
59#include <machine/cpu.h>
60#include <machine/cpuinfo.h>
61#include <machine/cpufunc.h>
62#include <machine/cpuregs.h>
63#include <machine/hwfunc.h>
64#include <machine/intr_machdep.h>
65#include <machine/locore.h>
66#include <machine/md_var.h>
67#include <machine/pte.h>
68#include <machine/sigframe.h>
69#include <machine/trap.h>
70#include <machine/vmparam.h>
71
72#include <mips/sentry5/s5reg.h>
73
74#ifdef CFE
75#include <dev/cfe/cfe_api.h>
76#endif
77
78extern int *edata;
79extern int *end;
80
81void
82platform_cpu_init()
83{
84	/* Nothing special */
85}
86
87static void
88mips_init(void)
89{
90	int i, j;
91
92	printf("entry: mips_init()\n");
93
94#ifdef CFE
95	/*
96	 * Query DRAM memory map from CFE.
97	 */
98	physmem = 0;
99	for (i = 0; i < 10; i += 2) {
100		int result;
101		uint64_t addr, len, type;
102
103		result = cfe_enummem(i, 0, &addr, &len, &type);
104		if (result < 0) {
105			phys_avail[i] = phys_avail[i + 1] = 0;
106			break;
107		}
108		if (type != CFE_MI_AVAILABLE)
109			continue;
110
111		phys_avail[i] = addr;
112		if (i == 0 && addr == 0) {
113			/*
114			 * If this is the first physical memory segment probed
115			 * from CFE, omit the region at the start of physical
116			 * memory where the kernel has been loaded.
117			 */
118			phys_avail[i] += MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
119		}
120		phys_avail[i + 1] = addr + len;
121		physmem += len;
122	}
123
124	realmem = btoc(physmem);
125#endif
126
127	for (j = 0; j < i; j++)
128		dump_avail[j] = phys_avail[j];
129
130	physmem = realmem;
131
132	init_param1();
133	init_param2(physmem);
134	mips_cpu_init();
135	pmap_bootstrap();
136	mips_proc0_init();
137	mutex_init();
138	kdb_init();
139#ifdef KDB
140	if (boothowto & RB_KDB)
141		kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
142#endif
143}
144
145void
146platform_reset(void)
147{
148
149#if defined(CFE)
150	cfe_exit(0, 0);
151#else
152	*((volatile uint8_t *)MIPS_PHYS_TO_KSEG1(SENTRY5_EXTIFADR)) = 0x80;
153#endif
154}
155
156void
157platform_start(__register_t a0, __register_t a1, __register_t a2,
158	       __register_t a3)
159{
160	vm_offset_t kernend;
161	uint64_t platform_counter_freq;
162
163	/* clear the BSS and SBSS segments */
164	kernend = (vm_offset_t)&end;
165	memset(&edata, 0, kernend - (vm_offset_t)(&edata));
166
167	mips_postboot_fixup();
168
169	/* Initialize pcpu stuff */
170	mips_pcpu0_init();
171
172#ifdef CFE
173	/*
174	 * Initialize CFE firmware trampolines before
175	 * we initialize the low-level console.
176	 *
177	 * CFE passes the following values in registers:
178	 * a0: firmware handle
179	 * a2: firmware entry point
180	 * a3: entry point seal
181	 */
182	if (a3 == CFE_EPTSEAL)
183		cfe_init(a0, a2);
184#endif
185	cninit();
186
187	mips_init();
188
189# if 0
190	/*
191	 * Probe the Broadcom Sentry5's on-chip PLL clock registers
192	 * and discover the CPU pipeline clock and bus clock
193	 * multipliers from this.
194	 * XXX: Wrong place. You have to ask the ChipCommon
195	 * or External Interface cores on the SiBa.
196	 */
197	uint32_t busmult, cpumult, refclock, clkcfg1;
198#define S5_CLKCFG1_REFCLOCK_MASK	0x0000001F
199#define S5_CLKCFG1_BUSMULT_MASK		0x000003E0
200#define S5_CLKCFG1_BUSMULT_SHIFT	5
201#define S5_CLKCFG1_CPUMULT_MASK		0xFFFFFC00
202#define S5_CLKCFG1_CPUMULT_SHIFT	10
203
204	counter_freq = 100000000;	/* XXX */
205
206	clkcfg1 = s5_rd_clkcfg1();
207	printf("clkcfg1 = 0x%08x\n", clkcfg1);
208
209	refclock = clkcfg1 & 0x1F;
210	busmult = ((clkcfg1 & 0x000003E0) >> 5) + 1;
211	cpumult = ((clkcfg1 & 0xFFFFFC00) >> 10) + 1;
212
213	printf("refclock = %u\n", refclock);
214	printf("busmult = %u\n", busmult);
215	printf("cpumult = %u\n", cpumult);
216
217	counter_freq = cpumult * refclock;
218# else
219	platform_counter_freq = 200 * 1000 * 1000; /* Sentry5 is 200MHz */
220# endif
221
222	mips_timer_init_params(platform_counter_freq, 0);
223}
224