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 #include <sys/cdefs.h> 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 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 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 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 127 booke_disable_l2_cache(void) 128 { 129 } 130 131 /* Return 0 on handled success, otherwise signal number. */ 132 int 133 cpu_machine_check(struct thread *td, struct trapframe *frame, int *ucode) 134 { 135 136 *ucode = BUS_OBJERR; 137 return (SIGBUS); 138 } 139