1/*-
2 * Copyright (c) 2008 Marcel Moolenaar
3 * Copyright (c) 2009 Nathan Whitehorn
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
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 ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD$");
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/kernel.h>
34#include <sys/bus.h>
35#include <sys/pcpu.h>
36#include <sys/proc.h>
37#include <sys/smp.h>
38#include <vm/vm.h>
39#include <vm/pmap.h>
40
41#include <machine/altivec.h>	/* For save_vec() */
42#include <machine/bus.h>
43#include <machine/cpu.h>
44#include <machine/fpu.h>	/* For save_fpu() */
45#include <machine/hid.h>
46#include <machine/platformvar.h>
47#include <machine/setjmp.h>
48#include <machine/smp.h>
49#include <machine/spr.h>
50
51#include <dev/ofw/openfirm.h>
52#include <machine/ofw_machdep.h>
53
54#include "platform_if.h"
55
56extern void *ap_pcpu;
57
58static int powermac_probe(platform_t);
59static int powermac_attach(platform_t);
60void powermac_mem_regions(platform_t, struct mem_region *phys, int *physsz,
61    struct mem_region *avail, int *availsz);
62static u_long powermac_timebase_freq(platform_t, struct cpuref *cpuref);
63static int powermac_smp_first_cpu(platform_t, struct cpuref *cpuref);
64static int powermac_smp_next_cpu(platform_t, struct cpuref *cpuref);
65static int powermac_smp_get_bsp(platform_t, struct cpuref *cpuref);
66static int powermac_smp_start_cpu(platform_t, struct pcpu *cpu);
67static void powermac_reset(platform_t);
68static void powermac_sleep(platform_t);
69
70static platform_method_t powermac_methods[] = {
71	PLATFORMMETHOD(platform_probe, 		powermac_probe),
72	PLATFORMMETHOD(platform_attach,		powermac_attach),
73	PLATFORMMETHOD(platform_mem_regions,	powermac_mem_regions),
74	PLATFORMMETHOD(platform_timebase_freq,	powermac_timebase_freq),
75
76	PLATFORMMETHOD(platform_smp_first_cpu,	powermac_smp_first_cpu),
77	PLATFORMMETHOD(platform_smp_next_cpu,	powermac_smp_next_cpu),
78	PLATFORMMETHOD(platform_smp_get_bsp,	powermac_smp_get_bsp),
79	PLATFORMMETHOD(platform_smp_start_cpu,	powermac_smp_start_cpu),
80
81	PLATFORMMETHOD(platform_reset,		powermac_reset),
82	PLATFORMMETHOD(platform_sleep,		powermac_sleep),
83
84	PLATFORMMETHOD_END
85};
86
87static platform_def_t powermac_platform = {
88	"powermac",
89	powermac_methods,
90	0
91};
92
93PLATFORM_DEF(powermac_platform);
94
95static int
96powermac_probe(platform_t plat)
97{
98	char compat[255];
99	ssize_t compatlen;
100	char *curstr;
101	phandle_t root;
102
103	root = OF_peer(0);
104	if (root == 0)
105		return (ENXIO);
106
107	compatlen = OF_getprop(root, "compatible", compat, sizeof(compat));
108
109	for (curstr = compat; curstr < compat + compatlen;
110	    curstr += strlen(curstr) + 1) {
111		if (strncmp(curstr, "MacRISC", 7) == 0)
112			return (BUS_PROBE_SPECIFIC);
113	}
114
115	return (ENXIO);
116}
117
118void
119powermac_mem_regions(platform_t plat, struct mem_region *phys, int *physsz,
120    struct mem_region *avail, int *availsz)
121{
122	phandle_t memory;
123	cell_t memoryprop[PHYS_AVAIL_SZ * 2];
124	ssize_t propsize, i, j;
125	int physacells = 1;
126
127	memory = OF_finddevice("/memory");
128	if (memory == -1)
129		memory = OF_finddevice("/memory@0");
130
131	/* "reg" has variable #address-cells, but #size-cells is always 1 */
132	OF_getprop(OF_parent(memory), "#address-cells", &physacells,
133	    sizeof(physacells));
134
135	propsize = OF_getprop(memory, "reg", memoryprop, sizeof(memoryprop));
136	propsize /= sizeof(cell_t);
137	for (i = 0, j = 0; i < propsize; i += physacells+1, j++) {
138		phys[j].mr_start = memoryprop[i];
139		if (physacells == 2) {
140#ifndef __powerpc64__
141			/* On 32-bit PPC, ignore regions starting above 4 GB */
142			if (memoryprop[i] != 0) {
143				j--;
144				continue;
145			}
146#else
147			phys[j].mr_start <<= 32;
148#endif
149			phys[j].mr_start |= memoryprop[i+1];
150		}
151		phys[j].mr_size = memoryprop[i + physacells];
152	}
153	*physsz = j;
154
155	/* "available" always has #address-cells = 1 */
156	propsize = OF_getprop(memory, "available", memoryprop,
157	    sizeof(memoryprop));
158	if (propsize <= 0) {
159		for (i = 0; i < *physsz; i++) {
160			avail[i].mr_start = phys[i].mr_start;
161			avail[i].mr_size = phys[i].mr_size;
162		}
163
164		*availsz = *physsz;
165	} else {
166		propsize /= sizeof(cell_t);
167		for (i = 0, j = 0; i < propsize; i += 2, j++) {
168			avail[j].mr_start = memoryprop[i];
169			avail[j].mr_size = memoryprop[i + 1];
170		}
171
172#ifdef __powerpc64__
173		/* Add in regions above 4 GB to the available list */
174		for (i = 0; i < *physsz; i++) {
175			if (phys[i].mr_start > BUS_SPACE_MAXADDR_32BIT) {
176				avail[j].mr_start = phys[i].mr_start;
177				avail[j].mr_size = phys[i].mr_size;
178				j++;
179			}
180		}
181#endif
182		*availsz = j;
183	}
184}
185
186static int
187powermac_attach(platform_t plat)
188{
189	phandle_t rootnode;
190	char model[32];
191
192
193	/*
194	 * Quiesce Open Firmware on PowerMac11,2 and 12,1. It is
195	 * necessary there to shut down a background thread doing fan
196	 * management, and is harmful on other machines (it will make OF
197	 * shut off power to various system components it had turned on).
198	 *
199	 * Note: we don't need to worry about which OF module we are
200	 * using since this is called only from very early boot, within
201	 * OF's boot context.
202	 */
203
204	rootnode = OF_finddevice("/");
205	if (OF_getprop(rootnode, "model", model, sizeof(model)) > 0) {
206		if (strcmp(model, "PowerMac11,2") == 0 ||
207		    strcmp(model, "PowerMac12,1") == 0) {
208			ofw_quiesce();
209		}
210	}
211
212	return (0);
213}
214
215static u_long
216powermac_timebase_freq(platform_t plat, struct cpuref *cpuref)
217{
218	phandle_t phandle;
219	int32_t ticks = -1;
220
221	phandle = cpuref->cr_hwref;
222
223	OF_getprop(phandle, "timebase-frequency", &ticks, sizeof(ticks));
224
225	if (ticks <= 0)
226		panic("Unable to determine timebase frequency!");
227
228	return (ticks);
229}
230
231
232static int
233powermac_smp_fill_cpuref(struct cpuref *cpuref, phandle_t cpu)
234{
235	cell_t cpuid;
236	int res;
237
238	cpuref->cr_hwref = cpu;
239	res = OF_getprop(cpu, "reg", &cpuid, sizeof(cpuid));
240
241	/*
242	 * psim doesn't have a reg property, so assume 0 as for the
243	 * uniprocessor case in the CHRP spec.
244	 */
245	if (res < 0) {
246		cpuid = 0;
247	}
248
249	cpuref->cr_cpuid = cpuid & 0xff;
250	return (0);
251}
252
253static int
254powermac_smp_first_cpu(platform_t plat, struct cpuref *cpuref)
255{
256	char buf[8];
257	phandle_t cpu, dev, root;
258	int res;
259
260	root = OF_peer(0);
261
262	dev = OF_child(root);
263	while (dev != 0) {
264		res = OF_getprop(dev, "name", buf, sizeof(buf));
265		if (res > 0 && strcmp(buf, "cpus") == 0)
266			break;
267		dev = OF_peer(dev);
268	}
269	if (dev == 0) {
270		/*
271		 * psim doesn't have a name property on the /cpus node,
272		 * but it can be found directly
273		 */
274		dev = OF_finddevice("/cpus");
275		if (dev == -1)
276			return (ENOENT);
277	}
278
279	cpu = OF_child(dev);
280
281	while (cpu != 0) {
282		res = OF_getprop(cpu, "device_type", buf, sizeof(buf));
283		if (res > 0 && strcmp(buf, "cpu") == 0)
284			break;
285		cpu = OF_peer(cpu);
286	}
287	if (cpu == 0)
288		return (ENOENT);
289
290	return (powermac_smp_fill_cpuref(cpuref, cpu));
291}
292
293static int
294powermac_smp_next_cpu(platform_t plat, struct cpuref *cpuref)
295{
296	char buf[8];
297	phandle_t cpu;
298	int res;
299
300	cpu = OF_peer(cpuref->cr_hwref);
301	while (cpu != 0) {
302		res = OF_getprop(cpu, "device_type", buf, sizeof(buf));
303		if (res > 0 && strcmp(buf, "cpu") == 0)
304			break;
305		cpu = OF_peer(cpu);
306	}
307	if (cpu == 0)
308		return (ENOENT);
309
310	return (powermac_smp_fill_cpuref(cpuref, cpu));
311}
312
313static int
314powermac_smp_get_bsp(platform_t plat, struct cpuref *cpuref)
315{
316	ihandle_t inst;
317	phandle_t bsp, chosen;
318	int res;
319
320	chosen = OF_finddevice("/chosen");
321	if (chosen == -1)
322		return (ENXIO);
323
324	res = OF_getprop(chosen, "cpu", &inst, sizeof(inst));
325	if (res < 0)
326		return (ENXIO);
327
328	bsp = OF_instance_to_package(inst);
329	return (powermac_smp_fill_cpuref(cpuref, bsp));
330}
331
332static int
333powermac_smp_start_cpu(platform_t plat, struct pcpu *pc)
334{
335#ifdef SMP
336	phandle_t cpu;
337	volatile uint8_t *rstvec;
338	static volatile uint8_t *rstvec_virtbase = NULL;
339	int res, reset, timeout;
340
341	cpu = pc->pc_hwref;
342	res = OF_getprop(cpu, "soft-reset", &reset, sizeof(reset));
343	if (res < 0) {
344		reset = 0x58;
345
346		switch (pc->pc_cpuid) {
347		case 0:
348			reset += 0x03;
349			break;
350		case 1:
351			reset += 0x04;
352			break;
353		case 2:
354			reset += 0x0f;
355			break;
356		case 3:
357			reset += 0x10;
358			break;
359		default:
360			return (ENXIO);
361		}
362	}
363
364	ap_pcpu = pc;
365
366	if (rstvec_virtbase == NULL)
367		rstvec_virtbase = pmap_mapdev(0x80000000, PAGE_SIZE);
368
369	rstvec = rstvec_virtbase + reset;
370
371	*rstvec = 4;
372	powerpc_sync();
373	(void)(*rstvec);
374	powerpc_sync();
375	DELAY(1);
376	*rstvec = 0;
377	powerpc_sync();
378	(void)(*rstvec);
379	powerpc_sync();
380
381	timeout = 10000;
382	while (!pc->pc_awake && timeout--)
383		DELAY(100);
384
385	return ((pc->pc_awake) ? 0 : EBUSY);
386#else
387	/* No SMP support */
388	return (ENXIO);
389#endif
390}
391
392static void
393powermac_reset(platform_t platform)
394{
395	OF_reboot();
396}
397
398void
399powermac_sleep(platform_t platform)
400{
401
402	*(unsigned long *)0x80 = 0x100;
403	cpu_sleep();
404}
405
406