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 __asm __volatile("mtsprg 0, %0" :: "r"(ap_pcpu));
70 switch (mfpvr() >> 16) {
74 /* Restore HID4 and HID5, which are necessary for the MMU */
77 mtspr(SPR_HID4, bsp_state[2]); powerpc_sync(); isync();
78 mtspr(SPR_HID5, bsp_state[3]); powerpc_sync(); isync();
80 __asm __volatile("ld %0, 16(%2); sync; isync; \
81 mtspr %1, %0; sync; isync;"
82 : "=r"(reg) : "K"(SPR_HID4), "b"(bsp_state));
83 __asm __volatile("ld %0, 24(%2); sync; isync; \
84 mtspr %1, %0; sync; isync;"
85 : "=r"(reg) : "K"(SPR_HID5), "b"(bsp_state));
93 cpudep_ap_bootstrap(void)
97 msr = PSL_KERNSET & ~PSL_EE;
100 pcpup->pc_curthread = pcpup->pc_idlethread;
102 __asm __volatile("mr 13,%0" :: "r"(pcpup->pc_curthread));
104 __asm __volatile("mr 2,%0" :: "r"(pcpup->pc_curthread));
106 pcpup->pc_curpcb = pcpup->pc_curthread->td_pcb;
107 sp = pcpup->pc_curpcb->pcb_sp;
113 mpc74xx_l2_enable(register_t l2cr_config)
118 vers = mfpvr() >> 16;
129 ccr = mfspr(SPR_L2CR);
133 /* Configure L2 cache. */
134 ccr = l2cr_config & ~L2CR_L2E;
135 mtspr(SPR_L2CR, ccr | L2CR_L2I);
137 ccr = mfspr(SPR_L2CR);
140 mtspr(SPR_L2CR, l2cr_config);
143 return (l2cr_config);
147 mpc745x_l3_enable(register_t l3cr_config)
151 ccr = mfspr(SPR_L3CR);
155 /* Configure L3 cache. */
156 ccr = l3cr_config & ~(L3CR_L3E | L3CR_L3I | L3CR_L3PE | L3CR_L3CLKEN);
157 mtspr(SPR_L3CR, ccr);
158 ccr |= 0x4000000; /* Magic, but documented. */
159 mtspr(SPR_L3CR, ccr);
161 mtspr(SPR_L3CR, ccr);
162 mtspr(SPR_L3CR, ccr | L3CR_L3I);
163 while (mfspr(SPR_L3CR) & L3CR_L3I)
165 mtspr(SPR_L3CR, ccr & ~L3CR_L3CLKEN);
168 mtspr(SPR_L3CR, ccr);
172 mtspr(SPR_L3CR, ccr);
179 mpc74xx_l1d_enable(void)
183 hid = mfspr(SPR_HID0);
187 /* Enable L1 D-cache */
190 mtspr(SPR_HID0, hid | HID0_DCFI);
197 mpc74xx_l1i_enable(void)
201 hid = mfspr(SPR_HID0);
205 /* Enable L1 I-cache */
208 mtspr(SPR_HID0, hid | HID0_ICFI);
215 cpudep_save_config(void *dummy)
219 vers = mfpvr() >> 16;
226 bsp_state[0] = mfspr(SPR_HID0);
227 bsp_state[1] = mfspr(SPR_HID1);
228 bsp_state[2] = mfspr(SPR_HID4);
229 bsp_state[3] = mfspr(SPR_HID5);
231 __asm __volatile ("mfspr %0,%2; mr %1,%0; srdi %0,%0,32"
232 : "=r" (bsp_state[0]),"=r" (bsp_state[1]) : "K" (SPR_HID0));
233 __asm __volatile ("mfspr %0,%2; mr %1,%0; srdi %0,%0,32"
234 : "=r" (bsp_state[2]),"=r" (bsp_state[3]) : "K" (SPR_HID1));
235 __asm __volatile ("mfspr %0,%2; mr %1,%0; srdi %0,%0,32"
236 : "=r" (bsp_state[4]),"=r" (bsp_state[5]) : "K" (SPR_HID4));
237 __asm __volatile ("mfspr %0,%2; mr %1,%0; srdi %0,%0,32"
238 : "=r" (bsp_state[6]),"=r" (bsp_state[7]) : "K" (SPR_HID5));
245 #ifdef NOTYET /* Causes problems if in instruction stream on 970 */
246 if (mfmsr() & PSL_HV) {
247 bsp_state[0] = mfspr(SPR_HID0);
248 bsp_state[1] = mfspr(SPR_HID1);
249 bsp_state[2] = mfspr(SPR_HID4);
250 bsp_state[3] = mfspr(SPR_HID6);
252 bsp_state[4] = mfspr(SPR_CELL_TSCR);
256 bsp_state[5] = mfspr(SPR_CELL_TSRL);
262 /* Only MPC745x CPUs have an L3 cache. */
263 bsp_state[3] = mfspr(SPR_L3CR);
270 bsp_state[2] = mfspr(SPR_L2CR);
271 bsp_state[1] = mfspr(SPR_HID1);
272 bsp_state[0] = mfspr(SPR_HID0);
283 vers = mfpvr() >> 16;
285 /* The following is needed for restoring from sleep. */
286 platform_smp_timebase_sync(0, 1);
293 __asm __volatile("mtspr 311,%0" :: "r"(0));
297 * The 970 has strange rules about how to update HID registers.
298 * See Table 2-3, 970MP manual
300 * Note: HID4 and HID5 restored already in
301 * cpudep_ap_early_bootstrap()
304 __asm __volatile("mtasr %0; sync" :: "r"(0));
309 mfspr %0, %1; mfspr %0, %1; mfspr %0, %1; \
310 mfspr %0, %1; mfspr %0, %1; mfspr %0, %1; \
312 :: "r"(bsp_state[0]), "K"(SPR_HID0));
313 __asm __volatile("sync; isync; \
314 mtspr %1, %0; mtspr %1, %0; sync; isync"
315 :: "r"(bsp_state[1]), "K"(SPR_HID1));
321 mfspr %0, %1; mfspr %0, %1; mfspr %0, %1; \
322 mfspr %0, %1; mfspr %0, %1; mfspr %0, %1; \
324 : "=r"(reg) : "K"(SPR_HID0), "b"(bsp_state));
325 __asm __volatile("ld %0, 8(%2); sync; isync; \
326 mtspr %1, %0; mtspr %1, %0; sync; isync"
327 : "=r"(reg) : "K"(SPR_HID1), "b"(bsp_state));
333 #ifdef NOTYET /* Causes problems if in instruction stream on 970 */
334 if (mfmsr() & PSL_HV) {
335 mtspr(SPR_HID0, bsp_state[0]);
336 mtspr(SPR_HID1, bsp_state[1]);
337 mtspr(SPR_HID4, bsp_state[2]);
338 mtspr(SPR_HID6, bsp_state[3]);
340 mtspr(SPR_CELL_TSCR, bsp_state[4]);
344 mtspr(SPR_CELL_TSRL, bsp_state[5]);
354 /* XXX: Program the CPU ID into PIR */
355 __asm __volatile("mtspr 1023,%0" :: "r"(PCPU_GET(cpuid)));
360 mtspr(SPR_HID0, bsp_state[0]); isync();
361 mtspr(SPR_HID1, bsp_state[1]); isync();
363 /* Now enable the L3 cache. */
368 /* Only MPC745x CPUs have an L3 cache. */
369 reg = mpc745x_l3_enable(bsp_state[3]);
374 reg = mpc74xx_l2_enable(bsp_state[2]);
375 reg = mpc74xx_l1d_enable();
376 reg = mpc74xx_l1i_enable();
384 if (mfmsr() & PSL_HV)
385 mtspr(SPR_LPCR, mfspr(SPR_LPCR) | LPCR_LPES);
390 if (!(mfmsr() & PSL_HV)) /* Rely on HV to have set things up */
393 printf("WARNING: Unknown CPU type. Cache performace may be "