2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2008 Marcel Moolenaar
5 * Copyright (c) 2009 Nathan Whitehorn
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
43 #include <machine/altivec.h> /* For save_vec() */
44 #include <machine/bus.h>
45 #include <machine/cpu.h>
46 #include <machine/fpu.h> /* For save_fpu() */
47 #include <machine/hid.h>
48 #include <machine/platformvar.h>
49 #include <machine/setjmp.h>
50 #include <machine/smp.h>
51 #include <machine/spr.h>
53 #include <dev/ofw/openfirm.h>
54 #include <machine/ofw_machdep.h>
56 #include "platform_if.h"
60 static int powermac_probe(platform_t);
61 static int powermac_attach(platform_t);
62 void powermac_mem_regions(platform_t, struct mem_region *phys, int *physsz,
63 struct mem_region *avail, int *availsz);
64 static u_long powermac_timebase_freq(platform_t, struct cpuref *cpuref);
65 static int powermac_smp_first_cpu(platform_t, struct cpuref *cpuref);
66 static int powermac_smp_next_cpu(platform_t, struct cpuref *cpuref);
67 static int powermac_smp_get_bsp(platform_t, struct cpuref *cpuref);
68 static int powermac_smp_start_cpu(platform_t, struct pcpu *cpu);
69 static void powermac_smp_timebase_sync(platform_t, u_long tb, int ap);
70 static void powermac_reset(platform_t);
71 static void powermac_sleep(platform_t);
73 static platform_method_t powermac_methods[] = {
74 PLATFORMMETHOD(platform_probe, powermac_probe),
75 PLATFORMMETHOD(platform_attach, powermac_attach),
76 PLATFORMMETHOD(platform_mem_regions, powermac_mem_regions),
77 PLATFORMMETHOD(platform_timebase_freq, powermac_timebase_freq),
79 PLATFORMMETHOD(platform_smp_first_cpu, powermac_smp_first_cpu),
80 PLATFORMMETHOD(platform_smp_next_cpu, powermac_smp_next_cpu),
81 PLATFORMMETHOD(platform_smp_get_bsp, powermac_smp_get_bsp),
82 PLATFORMMETHOD(platform_smp_start_cpu, powermac_smp_start_cpu),
83 PLATFORMMETHOD(platform_smp_timebase_sync, powermac_smp_timebase_sync),
85 PLATFORMMETHOD(platform_reset, powermac_reset),
86 PLATFORMMETHOD(platform_sleep, powermac_sleep),
91 static platform_def_t powermac_platform = {
97 PLATFORM_DEF(powermac_platform);
100 powermac_probe(platform_t plat)
111 compatlen = OF_getprop(root, "compatible", compat, sizeof(compat));
113 for (curstr = compat; curstr < compat + compatlen;
114 curstr += strlen(curstr) + 1) {
115 if (strncmp(curstr, "MacRISC", 7) == 0)
116 return (BUS_PROBE_SPECIFIC);
123 powermac_mem_regions(platform_t plat, struct mem_region *phys, int *physsz,
124 struct mem_region *avail, int *availsz)
127 cell_t memoryprop[PHYS_AVAIL_SZ * 2];
128 ssize_t propsize, i, j;
131 memory = OF_finddevice("/memory");
133 memory = OF_finddevice("/memory@0");
135 /* "reg" has variable #address-cells, but #size-cells is always 1 */
136 OF_getprop(OF_parent(memory), "#address-cells", &physacells,
139 propsize = OF_getprop(memory, "reg", memoryprop, sizeof(memoryprop));
140 propsize /= sizeof(cell_t);
141 for (i = 0, j = 0; i < propsize; i += physacells+1, j++) {
142 phys[j].mr_start = memoryprop[i];
143 if (physacells == 2) {
144 #ifndef __powerpc64__
145 /* On 32-bit PPC, ignore regions starting above 4 GB */
146 if (memoryprop[i] != 0) {
151 phys[j].mr_start <<= 32;
153 phys[j].mr_start |= memoryprop[i+1];
155 phys[j].mr_size = memoryprop[i + physacells];
159 /* "available" always has #address-cells = 1 */
160 propsize = OF_getprop(memory, "available", memoryprop,
163 for (i = 0; i < *physsz; i++) {
164 avail[i].mr_start = phys[i].mr_start;
165 avail[i].mr_size = phys[i].mr_size;
170 propsize /= sizeof(cell_t);
171 for (i = 0, j = 0; i < propsize; i += 2, j++) {
172 avail[j].mr_start = memoryprop[i];
173 avail[j].mr_size = memoryprop[i + 1];
177 /* Add in regions above 4 GB to the available list */
178 for (i = 0; i < *physsz; i++) {
179 if (phys[i].mr_start > BUS_SPACE_MAXADDR_32BIT) {
180 avail[j].mr_start = phys[i].mr_start;
181 avail[j].mr_size = phys[i].mr_size;
191 powermac_attach(platform_t plat)
197 * Quiesce Open Firmware on PowerMac11,2 and 12,1. It is
198 * necessary there to shut down a background thread doing fan
199 * management, and is harmful on other machines (it will make OF
200 * shut off power to various system components it had turned on).
202 * Note: we don't need to worry about which OF module we are
203 * using since this is called only from very early boot, within
207 rootnode = OF_finddevice("/");
208 if (OF_getprop(rootnode, "model", model, sizeof(model)) > 0) {
209 if (strcmp(model, "PowerMac11,2") == 0 ||
210 strcmp(model, "PowerMac12,1") == 0) {
219 powermac_timebase_freq(platform_t plat, struct cpuref *cpuref)
224 phandle = cpuref->cr_hwref;
226 OF_getprop(phandle, "timebase-frequency", &ticks, sizeof(ticks));
229 panic("Unable to determine timebase frequency!");
235 powermac_smp_fill_cpuref(struct cpuref *cpuref, phandle_t cpu)
240 cpuref->cr_hwref = cpu;
241 res = OF_getprop(cpu, "reg", &cpuid, sizeof(cpuid));
244 * psim doesn't have a reg property, so assume 0 as for the
245 * uniprocessor case in the CHRP spec.
251 cpuref->cr_cpuid = cpuid & 0xff;
256 powermac_smp_first_cpu(platform_t plat, struct cpuref *cpuref)
259 phandle_t cpu, dev, root;
264 dev = OF_child(root);
266 res = OF_getprop(dev, "name", buf, sizeof(buf));
267 if (res > 0 && strcmp(buf, "cpus") == 0)
273 * psim doesn't have a name property on the /cpus node,
274 * but it can be found directly
276 dev = OF_finddevice("/cpus");
284 res = OF_getprop(cpu, "device_type", buf, sizeof(buf));
285 if (res > 0 && strcmp(buf, "cpu") == 0)
292 return (powermac_smp_fill_cpuref(cpuref, cpu));
296 powermac_smp_next_cpu(platform_t plat, struct cpuref *cpuref)
302 cpu = OF_peer(cpuref->cr_hwref);
304 res = OF_getprop(cpu, "device_type", buf, sizeof(buf));
305 if (res > 0 && strcmp(buf, "cpu") == 0)
312 return (powermac_smp_fill_cpuref(cpuref, cpu));
316 powermac_smp_get_bsp(platform_t plat, struct cpuref *cpuref)
319 phandle_t bsp, chosen;
322 chosen = OF_finddevice("/chosen");
326 res = OF_getprop(chosen, "cpu", &inst, sizeof(inst));
330 bsp = OF_instance_to_package(inst);
331 return (powermac_smp_fill_cpuref(cpuref, bsp));
335 powermac_smp_start_cpu(platform_t plat, struct pcpu *pc)
339 volatile uint8_t *rstvec;
340 static volatile uint8_t *rstvec_virtbase = NULL;
341 int res, reset, timeout;
344 res = OF_getprop(cpu, "soft-reset", &reset, sizeof(reset));
348 switch (pc->pc_cpuid) {
368 if (rstvec_virtbase == NULL)
369 rstvec_virtbase = pmap_mapdev(0x80000000, PAGE_SIZE);
371 rstvec = rstvec_virtbase + reset;
384 while (!pc->pc_awake && timeout--)
387 return ((pc->pc_awake) ? 0 : EBUSY);
395 powermac_smp_timebase_sync(platform_t plat, u_long tb, int ap)
402 powermac_reset(platform_t platform)
408 powermac_sleep(platform_t platform)
411 *(unsigned long *)0x80 = 0x100;