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);
72 static void powermac_sleep(platform_t);
75 static platform_method_t powermac_methods[] = {
76 PLATFORMMETHOD(platform_probe, powermac_probe),
77 PLATFORMMETHOD(platform_attach, powermac_attach),
78 PLATFORMMETHOD(platform_mem_regions, powermac_mem_regions),
79 PLATFORMMETHOD(platform_timebase_freq, powermac_timebase_freq),
81 PLATFORMMETHOD(platform_smp_first_cpu, powermac_smp_first_cpu),
82 PLATFORMMETHOD(platform_smp_next_cpu, powermac_smp_next_cpu),
83 PLATFORMMETHOD(platform_smp_get_bsp, powermac_smp_get_bsp),
84 PLATFORMMETHOD(platform_smp_start_cpu, powermac_smp_start_cpu),
85 PLATFORMMETHOD(platform_smp_timebase_sync, powermac_smp_timebase_sync),
87 PLATFORMMETHOD(platform_reset, powermac_reset),
89 PLATFORMMETHOD(platform_sleep, powermac_sleep),
95 static platform_def_t powermac_platform = {
101 PLATFORM_DEF(powermac_platform);
104 powermac_probe(platform_t plat)
115 compatlen = OF_getprop(root, "compatible", compat, sizeof(compat));
117 for (curstr = compat; curstr < compat + compatlen;
118 curstr += strlen(curstr) + 1) {
119 if (strncmp(curstr, "MacRISC", 7) == 0)
120 return (BUS_PROBE_SPECIFIC);
127 powermac_mem_regions(platform_t plat, struct mem_region *phys, int *physsz,
128 struct mem_region *avail, int *availsz)
131 cell_t memoryprop[PHYS_AVAIL_SZ * 2];
132 ssize_t propsize, i, j;
135 memory = OF_finddevice("/memory");
137 memory = OF_finddevice("/memory@0");
139 /* "reg" has variable #address-cells, but #size-cells is always 1 */
140 OF_getprop(OF_parent(memory), "#address-cells", &physacells,
143 propsize = OF_getprop(memory, "reg", memoryprop, sizeof(memoryprop));
144 propsize /= sizeof(cell_t);
145 for (i = 0, j = 0; i < propsize; i += physacells+1, j++) {
146 phys[j].mr_start = memoryprop[i];
147 if (physacells == 2) {
148 #ifndef __powerpc64__
149 /* On 32-bit PPC, ignore regions starting above 4 GB */
150 if (memoryprop[i] != 0) {
155 phys[j].mr_start <<= 32;
157 phys[j].mr_start |= memoryprop[i+1];
159 phys[j].mr_size = memoryprop[i + physacells];
163 /* "available" always has #address-cells = 1 */
164 propsize = OF_getprop(memory, "available", memoryprop,
167 for (i = 0; i < *physsz; i++) {
168 avail[i].mr_start = phys[i].mr_start;
169 avail[i].mr_size = phys[i].mr_size;
174 propsize /= sizeof(cell_t);
175 for (i = 0, j = 0; i < propsize; i += 2, j++) {
176 avail[j].mr_start = memoryprop[i];
177 avail[j].mr_size = memoryprop[i + 1];
181 /* Add in regions above 4 GB to the available list */
182 for (i = 0; i < *physsz; i++) {
183 if (phys[i].mr_start > BUS_SPACE_MAXADDR_32BIT) {
184 avail[j].mr_start = phys[i].mr_start;
185 avail[j].mr_size = phys[i].mr_size;
195 powermac_attach(platform_t plat)
201 * Quiesce Open Firmware on PowerMac11,2 and 12,1. It is
202 * necessary there to shut down a background thread doing fan
203 * management, and is harmful on other machines (it will make OF
204 * shut off power to various system components it had turned on).
206 * Note: we don't need to worry about which OF module we are
207 * using since this is called only from very early boot, within
211 rootnode = OF_finddevice("/");
212 if (OF_getprop(rootnode, "model", model, sizeof(model)) > 0) {
213 if (strcmp(model, "PowerMac11,2") == 0 ||
214 strcmp(model, "PowerMac12,1") == 0) {
223 powermac_timebase_freq(platform_t plat, struct cpuref *cpuref)
228 phandle = cpuref->cr_hwref;
230 OF_getprop(phandle, "timebase-frequency", &ticks, sizeof(ticks));
233 panic("Unable to determine timebase frequency!");
239 powermac_smp_fill_cpuref(struct cpuref *cpuref, phandle_t cpu)
244 cpuref->cr_hwref = cpu;
245 res = OF_getprop(cpu, "reg", &cpuid, sizeof(cpuid));
248 * psim doesn't have a reg property, so assume 0 as for the
249 * uniprocessor case in the CHRP spec.
255 cpuref->cr_cpuid = cpuid & 0xff;
260 powermac_smp_first_cpu(platform_t plat, struct cpuref *cpuref)
263 phandle_t cpu, dev, root;
268 dev = OF_child(root);
270 res = OF_getprop(dev, "name", buf, sizeof(buf));
271 if (res > 0 && strcmp(buf, "cpus") == 0)
277 * psim doesn't have a name property on the /cpus node,
278 * but it can be found directly
280 dev = OF_finddevice("/cpus");
288 res = OF_getprop(cpu, "device_type", buf, sizeof(buf));
289 if (res > 0 && strcmp(buf, "cpu") == 0)
296 return (powermac_smp_fill_cpuref(cpuref, cpu));
300 powermac_smp_next_cpu(platform_t plat, struct cpuref *cpuref)
306 cpu = OF_peer(cpuref->cr_hwref);
308 res = OF_getprop(cpu, "device_type", buf, sizeof(buf));
309 if (res > 0 && strcmp(buf, "cpu") == 0)
316 return (powermac_smp_fill_cpuref(cpuref, cpu));
320 powermac_smp_get_bsp(platform_t plat, struct cpuref *cpuref)
323 phandle_t bsp, chosen;
326 chosen = OF_finddevice("/chosen");
330 res = OF_getprop(chosen, "cpu", &inst, sizeof(inst));
334 bsp = OF_instance_to_package(inst);
335 return (powermac_smp_fill_cpuref(cpuref, bsp));
339 powermac_smp_start_cpu(platform_t plat, struct pcpu *pc)
343 volatile uint8_t *rstvec;
344 static volatile uint8_t *rstvec_virtbase = NULL;
345 int res, reset, timeout;
348 res = OF_getprop(cpu, "soft-reset", &reset, sizeof(reset));
352 switch (pc->pc_cpuid) {
372 if (rstvec_virtbase == NULL)
373 rstvec_virtbase = pmap_mapdev(0x80000000, PAGE_SIZE);
375 rstvec = rstvec_virtbase + reset;
388 while (!pc->pc_awake && timeout--)
391 return ((pc->pc_awake) ? 0 : EBUSY);
399 powermac_smp_timebase_sync(platform_t plat, u_long tb, int ap)
406 powermac_reset(platform_t platform)
411 #ifndef __powerpc64__
413 powermac_sleep(platform_t platform)
415 /* Only supports MPC745x for now. */
416 if (!MPC745X_P(mfspr(SPR_PVR) >> 16)) {
417 printf("sleep only supported for G4 PowerMac hardware.\n");
421 *(unsigned long *)0x80 = 0x100;