1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2011-2012 Semihalf.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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 AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30
31 #include <sys/types.h>
32 #include <sys/param.h>
33 #include <sys/proc.h>
34 #include <sys/reboot.h>
35
36 #include <vm/vm.h>
37 #include <vm/pmap.h>
38
39 #include <machine/machdep.h>
40
41 #include <dev/fdt/fdt_common.h>
42
43 #include <powerpc/mpc85xx/mpc85xx.h>
44
45 extern void dcache_enable(void);
46 extern void dcache_inval(void);
47 extern void icache_enable(void);
48 extern void icache_inval(void);
49 extern void l2cache_enable(void);
50 extern void l2cache_inval(void);
51 extern void bpred_enable(void);
52
53 void
booke_enable_l1_cache(void)54 booke_enable_l1_cache(void)
55 {
56 uint32_t csr;
57
58 /* Enable D-cache if applicable */
59 csr = mfspr(SPR_L1CSR0);
60 if ((csr & L1CSR0_DCE) == 0) {
61 dcache_inval();
62 dcache_enable();
63 }
64
65 csr = mfspr(SPR_L1CSR0);
66 if ((boothowto & RB_VERBOSE) != 0 || (csr & L1CSR0_DCE) == 0)
67 printf("L1 D-cache %sabled\n",
68 (csr & L1CSR0_DCE) ? "en" : "dis");
69
70 /* Enable L1 I-cache if applicable. */
71 csr = mfspr(SPR_L1CSR1);
72 if ((csr & L1CSR1_ICE) == 0) {
73 icache_inval();
74 icache_enable();
75 }
76
77 csr = mfspr(SPR_L1CSR1);
78 if ((boothowto & RB_VERBOSE) != 0 || (csr & L1CSR1_ICE) == 0)
79 printf("L1 I-cache %sabled\n",
80 (csr & L1CSR1_ICE) ? "en" : "dis");
81 }
82
83 void
booke_enable_l2_cache(void)84 booke_enable_l2_cache(void)
85 {
86 uint32_t csr;
87
88 /* Enable L2 cache on E500mc */
89 if ((((mfpvr() >> 16) & 0xFFFF) == FSL_E500mc) ||
90 (((mfpvr() >> 16) & 0xFFFF) == FSL_E5500)) {
91 csr = mfspr(SPR_L2CSR0);
92 /*
93 * Don't actually attempt to manipulate the L2 cache if
94 * L2CFG0 is zero.
95 *
96 * Any chip with a working L2 cache will have a nonzero
97 * L2CFG0, as it will have a nonzero L2CSIZE field.
98 *
99 * This fixes waiting forever for cache enable in qemu,
100 * which does not implement the L2 cache.
101 */
102 if (mfspr(SPR_L2CFG0) != 0 && (csr & L2CSR0_L2E) == 0) {
103 l2cache_inval();
104 l2cache_enable();
105 }
106
107 csr = mfspr(SPR_L2CSR0);
108 if ((boothowto & RB_VERBOSE) != 0 || (csr & L2CSR0_L2E) == 0)
109 printf("L2 cache %sabled\n",
110 (csr & L2CSR0_L2E) ? "en" : "dis");
111 }
112 }
113
114 void
booke_enable_bpred(void)115 booke_enable_bpred(void)
116 {
117 uint32_t csr;
118
119 bpred_enable();
120 csr = mfspr(SPR_BUCSR);
121 if ((boothowto & RB_VERBOSE) != 0 || (csr & BUCSR_BPEN) == 0)
122 printf("Branch Predictor %sabled\n",
123 (csr & BUCSR_BPEN) ? "en" : "dis");
124 }
125
126 void
booke_disable_l2_cache(void)127 booke_disable_l2_cache(void)
128 {
129 }
130
131 /* Return 0 on handled success, otherwise signal number. */
132 int
cpu_machine_check(struct thread * td,struct trapframe * frame,int * ucode)133 cpu_machine_check(struct thread *td, struct trapframe *frame, int *ucode)
134 {
135
136 *ucode = BUS_OBJERR;
137 return (SIGBUS);
138 }
139