machdep_e500.c revision 257178
1/*- 2 * Copyright (c) 2011-2012 Semihalf. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/powerpc/booke/machdep_e500.c 257178 2013-10-26 18:18:14Z nwhitehorn $"); 29 30#include <sys/types.h> 31#include <sys/reboot.h> 32 33#include <machine/machdep.h> 34 35#include <dev/fdt/fdt_common.h> 36 37#include <powerpc/mpc85xx/mpc85xx.h> 38 39extern void dcache_enable(void); 40extern void dcache_inval(void); 41extern void icache_enable(void); 42extern void icache_inval(void); 43extern void l2cache_enable(void); 44extern void l2cache_inval(void); 45 46void 47booke_init_tlb(vm_paddr_t fdt_immr_pa) 48{ 49 50} 51 52void 53booke_enable_l1_cache(void) 54{ 55 uint32_t csr; 56 57 /* Enable D-cache if applicable */ 58 csr = mfspr(SPR_L1CSR0); 59 if ((csr & L1CSR0_DCE) == 0) { 60 dcache_inval(); 61 dcache_enable(); 62 } 63 64 csr = mfspr(SPR_L1CSR0); 65 if ((boothowto & RB_VERBOSE) != 0 || (csr & L1CSR0_DCE) == 0) 66 printf("L1 D-cache %sabled\n", 67 (csr & L1CSR0_DCE) ? "en" : "dis"); 68 69 /* Enable L1 I-cache if applicable. */ 70 csr = mfspr(SPR_L1CSR1); 71 if ((csr & L1CSR1_ICE) == 0) { 72 icache_inval(); 73 icache_enable(); 74 } 75 76 csr = mfspr(SPR_L1CSR1); 77 if ((boothowto & RB_VERBOSE) != 0 || (csr & L1CSR1_ICE) == 0) 78 printf("L1 I-cache %sabled\n", 79 (csr & L1CSR1_ICE) ? "en" : "dis"); 80} 81 82#if 0 83void 84booke_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 if ((csr & L2CSR0_L2E) == 0) { 93 l2cache_inval(); 94 l2cache_enable(); 95 } 96 97 csr = mfspr(SPR_L2CSR0); 98 if ((boothowto & RB_VERBOSE) != 0 || (csr & L2CSR0_L2E) == 0) 99 printf("L2 cache %sabled\n", 100 (csr & L2CSR0_L2E) ? "en" : "dis"); 101 } 102} 103 104void 105booke_enable_l3_cache(void) 106{ 107 uint32_t csr, size, ver; 108 109 /* Enable L3 CoreNet Platform Cache (CPC) */ 110 ver = SVR_VER(mfspr(SPR_SVR)); 111 if (ver == SVR_P2041 || ver == SVR_P2041E || ver == SVR_P3041 || 112 ver == SVR_P3041E || ver == SVR_P5020 || ver == SVR_P5020E) { 113 csr = ccsr_read4(OCP85XX_CPC_CSR0); 114 if ((csr & OCP85XX_CPC_CSR0_CE) == 0) { 115 l3cache_inval(); 116 l3cache_enable(); 117 } 118 119 csr = ccsr_read4(OCP85XX_CPC_CSR0); 120 if ((boothowto & RB_VERBOSE) != 0 || 121 (csr & OCP85XX_CPC_CSR0_CE) == 0) { 122 size = OCP85XX_CPC_CFG0_SZ_K(ccsr_read4(OCP85XX_CPC_CFG0)); 123 printf("L3 Corenet Platform Cache: %d KB %sabled\n", 124 size, (csr & OCP85XX_CPC_CSR0_CE) == 0 ? 125 "dis" : "en"); 126 } 127 } 128} 129 130void 131booke_disable_l2_cache(void) 132{ 133} 134 135static void 136l3cache_inval(void) 137{ 138 139 /* Flash invalidate the CPC and clear all the locks */ 140 ccsr_write4(OCP85XX_CPC_CSR0, OCP85XX_CPC_CSR0_FI | 141 OCP85XX_CPC_CSR0_LFC); 142 while (ccsr_read4(OCP85XX_CPC_CSR0) & (OCP85XX_CPC_CSR0_FI | 143 OCP85XX_CPC_CSR0_LFC)) 144 ; 145} 146 147static void 148l3cache_enable(void) 149{ 150 151 ccsr_write4(OCP85XX_CPC_CSR0, OCP85XX_CPC_CSR0_CE | 152 OCP85XX_CPC_CSR0_PE); 153 /* Read back to sync write */ 154 ccsr_read4(OCP85XX_CPC_CSR0); 155} 156#endif 157