2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2008 Marcel Moolenaar
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
40 #include <machine/bus.h>
41 #include <machine/cpu.h>
42 #include <machine/hid.h>
43 #include <machine/intr_machdep.h>
44 #include <machine/pcb.h>
45 #include <machine/psl.h>
46 #include <machine/smp.h>
47 #include <machine/spr.h>
48 #include <machine/trap.h>
50 #include <dev/ofw/openfirm.h>
51 #include <machine/ofw_machdep.h>
55 static register_t bsp_state[8] __aligned(8);
57 static void cpudep_save_config(void *dummy);
58 SYSINIT(cpu_save_config, SI_SUB_CPU, SI_ORDER_ANY, cpudep_save_config, NULL);
61 cpudep_ap_early_bootstrap(void)
67 switch (mfpvr() >> 16) {
71 /* Restore HID4 and HID5, which are necessary for the MMU */
74 mtspr(SPR_HID4, bsp_state[2]); powerpc_sync(); isync();
75 mtspr(SPR_HID5, bsp_state[3]); powerpc_sync(); isync();
77 __asm __volatile("ld %0, 16(%2); sync; isync; \
78 mtspr %1, %0; sync; isync;"
79 : "=r"(reg) : "K"(SPR_HID4), "b"(bsp_state));
80 __asm __volatile("ld %0, 24(%2); sync; isync; \
81 mtspr %1, %0; sync; isync;"
82 : "=r"(reg) : "K"(SPR_HID5), "b"(bsp_state));
89 if (mfmsr() & PSL_HV) {
92 * Direct interrupts to SRR instead of HSRR and
93 * reset LPCR otherwise
98 mtspr(SPR_LPCR, LPCR_LPES);
105 __asm __volatile("mtsprg 0, %0" :: "r"(ap_pcpu));
110 cpudep_ap_bootstrap(void)
114 msr = psl_kernset & ~PSL_EE;
117 pcpup->pc_curthread = pcpup->pc_idlethread;
119 __asm __volatile("mr 13,%0" :: "r"(pcpup->pc_curthread));
121 __asm __volatile("mr 2,%0" :: "r"(pcpup->pc_curthread));
123 pcpup->pc_curpcb = pcpup->pc_curthread->td_pcb;
124 sp = pcpup->pc_curpcb->pcb_sp;
130 mpc74xx_l2_enable(register_t l2cr_config)
135 vers = mfpvr() >> 16;
146 ccr = mfspr(SPR_L2CR);
150 /* Configure L2 cache. */
151 ccr = l2cr_config & ~L2CR_L2E;
152 mtspr(SPR_L2CR, ccr | L2CR_L2I);
154 ccr = mfspr(SPR_L2CR);
157 mtspr(SPR_L2CR, l2cr_config);
160 return (l2cr_config);
164 mpc745x_l3_enable(register_t l3cr_config)
168 ccr = mfspr(SPR_L3CR);
172 /* Configure L3 cache. */
173 ccr = l3cr_config & ~(L3CR_L3E | L3CR_L3I | L3CR_L3PE | L3CR_L3CLKEN);
174 mtspr(SPR_L3CR, ccr);
175 ccr |= 0x4000000; /* Magic, but documented. */
176 mtspr(SPR_L3CR, ccr);
178 mtspr(SPR_L3CR, ccr);
179 mtspr(SPR_L3CR, ccr | L3CR_L3I);
180 while (mfspr(SPR_L3CR) & L3CR_L3I)
182 mtspr(SPR_L3CR, ccr & ~L3CR_L3CLKEN);
185 mtspr(SPR_L3CR, ccr);
189 mtspr(SPR_L3CR, ccr);
196 mpc74xx_l1d_enable(void)
200 hid = mfspr(SPR_HID0);
204 /* Enable L1 D-cache */
207 mtspr(SPR_HID0, hid | HID0_DCFI);
214 mpc74xx_l1i_enable(void)
218 hid = mfspr(SPR_HID0);
222 /* Enable L1 I-cache */
225 mtspr(SPR_HID0, hid | HID0_ICFI);
232 cpudep_save_config(void *dummy)
236 vers = mfpvr() >> 16;
243 bsp_state[0] = mfspr(SPR_HID0);
244 bsp_state[1] = mfspr(SPR_HID1);
245 bsp_state[2] = mfspr(SPR_HID4);
246 bsp_state[3] = mfspr(SPR_HID5);
248 __asm __volatile ("mfspr %0,%2; mr %1,%0; srdi %0,%0,32"
249 : "=r" (bsp_state[0]),"=r" (bsp_state[1]) : "K" (SPR_HID0));
250 __asm __volatile ("mfspr %0,%2; mr %1,%0; srdi %0,%0,32"
251 : "=r" (bsp_state[2]),"=r" (bsp_state[3]) : "K" (SPR_HID1));
252 __asm __volatile ("mfspr %0,%2; mr %1,%0; srdi %0,%0,32"
253 : "=r" (bsp_state[4]),"=r" (bsp_state[5]) : "K" (SPR_HID4));
254 __asm __volatile ("mfspr %0,%2; mr %1,%0; srdi %0,%0,32"
255 : "=r" (bsp_state[6]),"=r" (bsp_state[7]) : "K" (SPR_HID5));
262 #ifdef NOTYET /* Causes problems if in instruction stream on 970 */
263 if (mfmsr() & PSL_HV) {
264 bsp_state[0] = mfspr(SPR_HID0);
265 bsp_state[1] = mfspr(SPR_HID1);
266 bsp_state[2] = mfspr(SPR_HID4);
267 bsp_state[3] = mfspr(SPR_HID6);
269 bsp_state[4] = mfspr(SPR_CELL_TSCR);
273 bsp_state[5] = mfspr(SPR_CELL_TSRL);
279 /* Only MPC745x CPUs have an L3 cache. */
280 bsp_state[3] = mfspr(SPR_L3CR);
287 bsp_state[2] = mfspr(SPR_L2CR);
288 bsp_state[1] = mfspr(SPR_HID1);
289 bsp_state[0] = mfspr(SPR_HID0);
300 vers = mfpvr() >> 16;
302 /* The following is needed for restoring from sleep. */
303 platform_smp_timebase_sync(0, 1);
310 __asm __volatile("mtspr 311,%0" :: "r"(0));
314 * The 970 has strange rules about how to update HID registers.
315 * See Table 2-3, 970MP manual
317 * Note: HID4 and HID5 restored already in
318 * cpudep_ap_early_bootstrap()
321 __asm __volatile("mtasr %0; sync" :: "r"(0));
326 mfspr %0, %1; mfspr %0, %1; mfspr %0, %1; \
327 mfspr %0, %1; mfspr %0, %1; mfspr %0, %1; \
329 :: "r"(bsp_state[0]), "K"(SPR_HID0));
330 __asm __volatile("sync; isync; \
331 mtspr %1, %0; mtspr %1, %0; sync; isync"
332 :: "r"(bsp_state[1]), "K"(SPR_HID1));
338 mfspr %0, %1; mfspr %0, %1; mfspr %0, %1; \
339 mfspr %0, %1; mfspr %0, %1; mfspr %0, %1; \
341 : "=r"(reg) : "K"(SPR_HID0), "b"(bsp_state));
342 __asm __volatile("ld %0, 8(%2); sync; isync; \
343 mtspr %1, %0; mtspr %1, %0; sync; isync"
344 : "=r"(reg) : "K"(SPR_HID1), "b"(bsp_state));
350 #ifdef NOTYET /* Causes problems if in instruction stream on 970 */
351 if (mfmsr() & PSL_HV) {
352 mtspr(SPR_HID0, bsp_state[0]);
353 mtspr(SPR_HID1, bsp_state[1]);
354 mtspr(SPR_HID4, bsp_state[2]);
355 mtspr(SPR_HID6, bsp_state[3]);
357 mtspr(SPR_CELL_TSCR, bsp_state[4]);
361 mtspr(SPR_CELL_TSRL, bsp_state[5]);
371 /* XXX: Program the CPU ID into PIR */
372 __asm __volatile("mtspr 1023,%0" :: "r"(PCPU_GET(cpuid)));
377 mtspr(SPR_HID0, bsp_state[0]); isync();
378 mtspr(SPR_HID1, bsp_state[1]); isync();
380 /* Now enable the L3 cache. */
385 /* Only MPC745x CPUs have an L3 cache. */
386 reg = mpc745x_l3_enable(bsp_state[3]);
391 reg = mpc74xx_l2_enable(bsp_state[2]);
392 reg = mpc74xx_l1d_enable();
393 reg = mpc74xx_l1i_enable();
401 if (mfmsr() & PSL_HV) {
402 mtspr(SPR_LPCR, mfspr(SPR_LPCR) | LPCR_LPES |
410 if (!(mfmsr() & PSL_HV)) /* Rely on HV to have set things up */
413 printf("WARNING: Unknown CPU type. Cache performace may be "