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: releng/10.3/sys/powerpc/powermac/platform_powermac.c 266020 2014-05-14 14:17:51Z ian $");
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/pmap.h>
48#include <machine/setjmp.h>
49#include <machine/smp.h>
50#include <machine/spr.h>
51
52#include <dev/ofw/openfirm.h>
53#include <machine/ofw_machdep.h>
54
55#include "platform_if.h"
56
57extern void *ap_pcpu;
58
59static int powermac_probe(platform_t);
60static int powermac_attach(platform_t);
61void powermac_mem_regions(platform_t, struct mem_region *phys, int *physsz,
62    struct mem_region *avail, int *availsz);
63static u_long powermac_timebase_freq(platform_t, struct cpuref *cpuref);
64static int powermac_smp_first_cpu(platform_t, struct cpuref *cpuref);
65static int powermac_smp_next_cpu(platform_t, struct cpuref *cpuref);
66static int powermac_smp_get_bsp(platform_t, struct cpuref *cpuref);
67static int powermac_smp_start_cpu(platform_t, struct pcpu *cpu);
68static void powermac_reset(platform_t);
69static void powermac_sleep(platform_t);
70
71static platform_method_t powermac_methods[] = {
72	PLATFORMMETHOD(platform_probe, 		powermac_probe),
73	PLATFORMMETHOD(platform_attach,		powermac_attach),
74	PLATFORMMETHOD(platform_mem_regions,	powermac_mem_regions),
75	PLATFORMMETHOD(platform_timebase_freq,	powermac_timebase_freq),
76
77	PLATFORMMETHOD(platform_smp_first_cpu,	powermac_smp_first_cpu),
78	PLATFORMMETHOD(platform_smp_next_cpu,	powermac_smp_next_cpu),
79	PLATFORMMETHOD(platform_smp_get_bsp,	powermac_smp_get_bsp),
80	PLATFORMMETHOD(platform_smp_start_cpu,	powermac_smp_start_cpu),
81
82	PLATFORMMETHOD(platform_reset,		powermac_reset),
83	PLATFORMMETHOD(platform_sleep,		powermac_sleep),
84
85	PLATFORMMETHOD_END
86};
87
88static platform_def_t powermac_platform = {
89	"powermac",
90	powermac_methods,
91	0
92};
93
94PLATFORM_DEF(powermac_platform);
95
96static int
97powermac_probe(platform_t plat)
98{
99	char compat[255];
100	ssize_t compatlen;
101	char *curstr;
102	phandle_t root;
103
104	root = OF_peer(0);
105	if (root == 0)
106		return (ENXIO);
107
108	compatlen = OF_getprop(root, "compatible", compat, sizeof(compat));
109
110	for (curstr = compat; curstr < compat + compatlen;
111	    curstr += strlen(curstr) + 1) {
112		if (strncmp(curstr, "MacRISC", 7) == 0)
113			return (BUS_PROBE_SPECIFIC);
114	}
115
116	return (ENXIO);
117}
118
119void
120powermac_mem_regions(platform_t plat, struct mem_region *phys, int *physsz,
121    struct mem_region *avail, int *availsz)
122{
123	phandle_t memory;
124	cell_t memoryprop[PHYS_AVAIL_SZ * 2];
125	ssize_t propsize, i, j;
126	int physacells = 1;
127
128	memory = OF_finddevice("/memory");
129
130	/* "reg" has variable #address-cells, but #size-cells is always 1 */
131	OF_getprop(OF_parent(memory), "#address-cells", &physacells,
132	    sizeof(physacells));
133
134	propsize = OF_getprop(memory, "reg", memoryprop, sizeof(memoryprop));
135	propsize /= sizeof(cell_t);
136	for (i = 0, j = 0; i < propsize; i += physacells+1, j++) {
137		phys[j].mr_start = memoryprop[i];
138		if (physacells == 2) {
139#ifndef __powerpc64__
140			/* On 32-bit PPC, ignore regions starting above 4 GB */
141			if (memoryprop[i] != 0) {
142				j--;
143				continue;
144			}
145#else
146			phys[j].mr_start <<= 32;
147#endif
148			phys[j].mr_start |= memoryprop[i+1];
149		}
150		phys[j].mr_size = memoryprop[i + physacells];
151	}
152	*physsz = j;
153
154	/* "available" always has #address-cells = 1 */
155	propsize = OF_getprop(memory, "available", memoryprop,
156	    sizeof(memoryprop));
157	propsize /= sizeof(cell_t);
158	for (i = 0, j = 0; i < propsize; i += 2, j++) {
159		avail[j].mr_start = memoryprop[i];
160		avail[j].mr_size = memoryprop[i + 1];
161	}
162
163#ifdef __powerpc64__
164	/* Add in regions above 4 GB to the available list */
165	for (i = 0; i < *physsz; i++) {
166		if (phys[i].mr_start > BUS_SPACE_MAXADDR_32BIT) {
167			avail[j].mr_start = phys[i].mr_start;
168			avail[j].mr_size = phys[i].mr_size;
169			j++;
170		}
171	}
172#endif
173	*availsz = j;
174}
175
176static int
177powermac_attach(platform_t plat)
178{
179	phandle_t rootnode;
180	char model[32];
181
182
183	/*
184	 * Quiesce Open Firmware on PowerMac11,2 and 12,1. It is
185	 * necessary there to shut down a background thread doing fan
186	 * management, and is harmful on other machines (it will make OF
187	 * shut off power to various system components it had turned on).
188	 *
189	 * Note: we don't need to worry about which OF module we are
190	 * using since this is called only from very early boot, within
191	 * OF's boot context.
192	 */
193
194	rootnode = OF_finddevice("/");
195	if (OF_getprop(rootnode, "model", model, sizeof(model)) > 0) {
196		if (strcmp(model, "PowerMac11,2") == 0 ||
197		    strcmp(model, "PowerMac12,1") == 0) {
198			ofw_quiesce();
199		}
200	}
201
202	return (0);
203}
204
205static u_long
206powermac_timebase_freq(platform_t plat, struct cpuref *cpuref)
207{
208	phandle_t phandle;
209	int32_t ticks = -1;
210
211	phandle = cpuref->cr_hwref;
212
213	OF_getprop(phandle, "timebase-frequency", &ticks, sizeof(ticks));
214
215	if (ticks <= 0)
216		panic("Unable to determine timebase frequency!");
217
218	return (ticks);
219}
220
221
222static int
223powermac_smp_fill_cpuref(struct cpuref *cpuref, phandle_t cpu)
224{
225	cell_t cpuid;
226	int res;
227
228	cpuref->cr_hwref = cpu;
229	res = OF_getprop(cpu, "reg", &cpuid, sizeof(cpuid));
230
231	/*
232	 * psim doesn't have a reg property, so assume 0 as for the
233	 * uniprocessor case in the CHRP spec.
234	 */
235	if (res < 0) {
236		cpuid = 0;
237	}
238
239	cpuref->cr_cpuid = cpuid & 0xff;
240	return (0);
241}
242
243static int
244powermac_smp_first_cpu(platform_t plat, struct cpuref *cpuref)
245{
246	char buf[8];
247	phandle_t cpu, dev, root;
248	int res;
249
250	root = OF_peer(0);
251
252	dev = OF_child(root);
253	while (dev != 0) {
254		res = OF_getprop(dev, "name", buf, sizeof(buf));
255		if (res > 0 && strcmp(buf, "cpus") == 0)
256			break;
257		dev = OF_peer(dev);
258	}
259	if (dev == 0) {
260		/*
261		 * psim doesn't have a name property on the /cpus node,
262		 * but it can be found directly
263		 */
264		dev = OF_finddevice("/cpus");
265		if (dev == -1)
266			return (ENOENT);
267	}
268
269	cpu = OF_child(dev);
270
271	while (cpu != 0) {
272		res = OF_getprop(cpu, "device_type", buf, sizeof(buf));
273		if (res > 0 && strcmp(buf, "cpu") == 0)
274			break;
275		cpu = OF_peer(cpu);
276	}
277	if (cpu == 0)
278		return (ENOENT);
279
280	return (powermac_smp_fill_cpuref(cpuref, cpu));
281}
282
283static int
284powermac_smp_next_cpu(platform_t plat, struct cpuref *cpuref)
285{
286	char buf[8];
287	phandle_t cpu;
288	int res;
289
290	cpu = OF_peer(cpuref->cr_hwref);
291	while (cpu != 0) {
292		res = OF_getprop(cpu, "device_type", buf, sizeof(buf));
293		if (res > 0 && strcmp(buf, "cpu") == 0)
294			break;
295		cpu = OF_peer(cpu);
296	}
297	if (cpu == 0)
298		return (ENOENT);
299
300	return (powermac_smp_fill_cpuref(cpuref, cpu));
301}
302
303static int
304powermac_smp_get_bsp(platform_t plat, struct cpuref *cpuref)
305{
306	ihandle_t inst;
307	phandle_t bsp, chosen;
308	int res;
309
310	chosen = OF_finddevice("/chosen");
311	if (chosen == -1)
312		return (ENXIO);
313
314	res = OF_getprop(chosen, "cpu", &inst, sizeof(inst));
315	if (res < 0)
316		return (ENXIO);
317
318	bsp = OF_instance_to_package(inst);
319	return (powermac_smp_fill_cpuref(cpuref, bsp));
320}
321
322static int
323powermac_smp_start_cpu(platform_t plat, struct pcpu *pc)
324{
325#ifdef SMP
326	phandle_t cpu;
327	volatile uint8_t *rstvec;
328	static volatile uint8_t *rstvec_virtbase = NULL;
329	int res, reset, timeout;
330
331	cpu = pc->pc_hwref;
332	res = OF_getprop(cpu, "soft-reset", &reset, sizeof(reset));
333	if (res < 0) {
334		reset = 0x58;
335
336		switch (pc->pc_cpuid) {
337		case 0:
338			reset += 0x03;
339			break;
340		case 1:
341			reset += 0x04;
342			break;
343		case 2:
344			reset += 0x0f;
345			break;
346		case 3:
347			reset += 0x10;
348			break;
349		default:
350			return (ENXIO);
351		}
352	}
353
354	ap_pcpu = pc;
355
356	if (rstvec_virtbase == NULL)
357		rstvec_virtbase = pmap_mapdev(0x80000000, PAGE_SIZE);
358
359	rstvec = rstvec_virtbase + reset;
360
361	*rstvec = 4;
362	powerpc_sync();
363	(void)(*rstvec);
364	powerpc_sync();
365	DELAY(1);
366	*rstvec = 0;
367	powerpc_sync();
368	(void)(*rstvec);
369	powerpc_sync();
370
371	timeout = 10000;
372	while (!pc->pc_awake && timeout--)
373		DELAY(100);
374
375	return ((pc->pc_awake) ? 0 : EBUSY);
376#else
377	/* No SMP support */
378	return (ENXIO);
379#endif
380}
381
382static void
383powermac_reset(platform_t platform)
384{
385	OF_reboot();
386}
387
388void
389powermac_sleep(platform_t platform)
390{
391
392	*(unsigned long *)0x80 = 0x100;
393	cpu_sleep();
394}
395
396