1 /* 2 * Copyright 2009-2012 Freescale Semiconductor, Inc 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License as 6 * published by the Free Software Foundation; either version 2 of 7 * the License, or (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 17 * MA 02111-1307 USA 18 */ 19 20 #include <common.h> 21 #include <asm/processor.h> 22 #include <asm/mmu.h> 23 #include <asm/fsl_law.h> 24 #include <asm/io.h> 25 26 DECLARE_GLOBAL_DATA_PTR; 27 28 #if defined(CONFIG_SYS_FSL_ERRATUM_IFC_A003399) && !defined(CONFIG_SYS_RAMBOOT) 29 void setup_ifc(void) 30 { 31 struct fsl_ifc *ifc_regs = (void *)CONFIG_SYS_IFC_ADDR; 32 u32 _mas0, _mas1, _mas2, _mas3, _mas7; 33 phys_addr_t flash_phys = CONFIG_SYS_FLASH_BASE_PHYS; 34 35 /* 36 * Adjust the TLB we were running out of to match the phys addr of the 37 * chip select we are adjusting and will return to. 38 */ 39 flash_phys += (~CONFIG_SYS_AMASK0) + 1 - 4*1024*1024; 40 41 _mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(15); 42 _mas1 = MAS1_VALID | MAS1_TID(0) | MAS1_TS | MAS1_IPROT | 43 MAS1_TSIZE(BOOKE_PAGESZ_4M); 44 _mas2 = FSL_BOOKE_MAS2(CONFIG_SYS_TEXT_BASE, MAS2_I|MAS2_G); 45 _mas3 = FSL_BOOKE_MAS3(flash_phys, 0, MAS3_SW|MAS3_SR|MAS3_SX); 46 _mas7 = FSL_BOOKE_MAS7(flash_phys); 47 48 mtspr(MAS0, _mas0); 49 mtspr(MAS1, _mas1); 50 mtspr(MAS2, _mas2); 51 mtspr(MAS3, _mas3); 52 mtspr(MAS7, _mas7); 53 54 asm volatile("isync;msync;tlbwe;isync"); 55 56 #if defined(CONFIG_SYS_PPC_E500_DEBUG_TLB) 57 /* 58 * TLB entry for debuggging in AS1 59 * Create temporary TLB entry in AS0 to handle debug exception 60 * As on debug exception MSR is cleared i.e. Address space is changed 61 * to 0. A TLB entry (in AS0) is required to handle debug exception generated 62 * in AS1. 63 * 64 * TLB entry is created for IVPR + IVOR15 to map on valid OP code address 65 * bacause flash's physical address is going to change as 66 * CONFIG_SYS_FLASH_BASE_PHYS. 67 */ 68 _mas0 = MAS0_TLBSEL(1) | 69 MAS0_ESEL(CONFIG_SYS_PPC_E500_DEBUG_TLB); 70 _mas1 = MAS1_VALID | MAS1_TID(0) | MAS1_IPROT | 71 MAS1_TSIZE(BOOKE_PAGESZ_4M); 72 _mas2 = FSL_BOOKE_MAS2(CONFIG_SYS_TEXT_BASE, MAS2_I|MAS2_G); 73 _mas3 = FSL_BOOKE_MAS3(flash_phys, 0, MAS3_SW|MAS3_SR|MAS3_SX); 74 _mas7 = FSL_BOOKE_MAS7(flash_phys); 75 76 mtspr(MAS0, _mas0); 77 mtspr(MAS1, _mas1); 78 mtspr(MAS2, _mas2); 79 mtspr(MAS3, _mas3); 80 mtspr(MAS7, _mas7); 81 82 asm volatile("isync;msync;tlbwe;isync"); 83 #endif 84 85 /* Change flash's physical address */ 86 out_be32(&(ifc_regs->cspr_cs[0].cspr), CONFIG_SYS_CSPR0); 87 out_be32(&(ifc_regs->csor_cs[0].csor), CONFIG_SYS_CSOR0); 88 out_be32(&(ifc_regs->amask_cs[0].amask), CONFIG_SYS_AMASK0); 89 90 return ; 91 } 92 #endif 93 94 /* We run cpu_init_early_f in AS = 1 */ 95 void cpu_init_early_f(void) 96 { 97 u32 mas0, mas1, mas2, mas3, mas7; 98 int i; 99 #ifdef CONFIG_SYS_FSL_ERRATUM_P1010_A003549 100 ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); 101 #endif 102 #if defined(CONFIG_SYS_FSL_ERRATUM_IFC_A003399) && !defined(CONFIG_SYS_RAMBOOT) 103 ccsr_l2cache_t *l2cache = (void *)CONFIG_SYS_MPC85xx_L2_ADDR; 104 u32 *dst, *src; 105 void (*setup_ifc_sram)(void); 106 #endif 107 108 /* Pointer is writable since we allocated a register for it */ 109 gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET); 110 111 /* 112 * Clear initial global data 113 * we don't use memset so we can share this code with NAND_SPL 114 */ 115 for (i = 0; i < sizeof(gd_t); i++) 116 ((char *)gd)[i] = 0; 117 118 mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(13); 119 mas1 = MAS1_VALID | MAS1_TID(0) | MAS1_TS | MAS1_TSIZE(BOOKE_PAGESZ_1M); 120 mas2 = FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR, MAS2_I|MAS2_G); 121 mas3 = FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_PHYS, 0, MAS3_SW|MAS3_SR); 122 mas7 = FSL_BOOKE_MAS7(CONFIG_SYS_CCSRBAR_PHYS); 123 124 write_tlb(mas0, mas1, mas2, mas3, mas7); 125 126 /* 127 * Work Around for IFC Erratum A-003549. This issue is P1010 128 * specific. LCLK(a free running clk signal) is muxed with IFC_CS3 on P1010 SOC 129 * Hence specifically selecting CS3. 130 */ 131 #ifdef CONFIG_SYS_FSL_ERRATUM_P1010_A003549 132 setbits_be32(&gur->pmuxcr, MPC85xx_PMUXCR_LCLK_IFC_CS3); 133 #endif 134 135 init_laws(); 136 137 /* 138 * Work Around for IFC Erratum A003399, issue will hit only when execution 139 * from NOR Flash 140 */ 141 #if defined(CONFIG_SYS_FSL_ERRATUM_IFC_A003399) && !defined(CONFIG_SYS_RAMBOOT) 142 #define SRAM_BASE_ADDR (0x00000000) 143 /* TLB for SRAM */ 144 mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(9); 145 mas1 = MAS1_VALID | MAS1_TID(0) | MAS1_TS | 146 MAS1_TSIZE(BOOKE_PAGESZ_1M); 147 mas2 = FSL_BOOKE_MAS2(SRAM_BASE_ADDR, MAS2_I); 148 mas3 = FSL_BOOKE_MAS3(SRAM_BASE_ADDR, 0, MAS3_SX|MAS3_SW|MAS3_SR); 149 mas7 = FSL_BOOKE_MAS7(0); 150 151 write_tlb(mas0, mas1, mas2, mas3, mas7); 152 153 out_be32(&l2cache->l2srbar0, SRAM_BASE_ADDR); 154 155 out_be32(&l2cache->l2errdis, 156 (MPC85xx_L2ERRDIS_MBECC | MPC85xx_L2ERRDIS_SBECC)); 157 158 out_be32(&l2cache->l2ctl, 159 (MPC85xx_L2CTL_L2E | MPC85xx_L2CTL_L2SRAM_ENTIRE)); 160 161 /* 162 * Copy the code in setup_ifc to L2SRAM. Do a word copy 163 * because NOR Flash on P1010 does not support byte 164 * access (Erratum IFC-A002769) 165 */ 166 setup_ifc_sram = (void *)SRAM_BASE_ADDR; 167 dst = (u32 *) SRAM_BASE_ADDR; 168 src = (u32 *) setup_ifc; 169 for (i = 0; i < 1024; i++) 170 *dst++ = *src++; 171 172 setup_ifc_sram(); 173 174 /* CLEANUP */ 175 clrbits_be32(&l2cache->l2ctl, 176 (MPC85xx_L2CTL_L2E | 177 MPC85xx_L2CTL_L2SRAM_ENTIRE)); 178 out_be32(&l2cache->l2srbar0, 0x0); 179 #endif 180 181 invalidate_tlb(1); 182 183 #if defined(CONFIG_SECURE_BOOT) 184 /* Disable the TLBs created by ISBC */ 185 for (i = CONFIG_SYS_ISBC_START_TLB; 186 i < CONFIG_SYS_ISBC_START_TLB + CONFIG_SYS_ISBC_NUM_TLBS; i++) 187 disable_tlb(i); 188 #endif 189 190 init_tlbs(); 191 } 192