1 /* 2 * Copyright 2006,2009-2010 Freescale Semiconductor, Inc. 3 * Jeff Brown 4 * Srikanth Srinivasan (srikanth.srinivasan@freescale.com) 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 #include <common.h> 10 #include <watchdog.h> 11 #include <command.h> 12 #include <asm/cache.h> 13 #include <asm/mmu.h> 14 #include <mpc86xx.h> 15 #include <asm/fsl_law.h> 16 17 DECLARE_GLOBAL_DATA_PTR; 18 19 /* 20 * Default board reset function 21 */ 22 static void 23 __board_reset(void) 24 { 25 /* Do nothing */ 26 } 27 void board_reset(void) __attribute__((weak, alias("__board_reset"))); 28 29 30 int 31 checkcpu(void) 32 { 33 sys_info_t sysinfo; 34 uint pvr, svr; 35 uint major, minor; 36 char buf1[32], buf2[32]; 37 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR; 38 volatile ccsr_gur_t *gur = &immap->im_gur; 39 struct cpu_type *cpu; 40 uint msscr0 = mfspr(MSSCR0); 41 42 svr = get_svr(); 43 major = SVR_MAJ(svr); 44 minor = SVR_MIN(svr); 45 46 if (cpu_numcores() > 1) { 47 #ifndef CONFIG_MP 48 puts("Unicore software on multiprocessor system!!\n" 49 "To enable mutlticore build define CONFIG_MP\n"); 50 #endif 51 } 52 puts("CPU: "); 53 54 cpu = gd->arch.cpu; 55 56 puts(cpu->name); 57 58 printf(", Version: %d.%d, (0x%08x)\n", major, minor, svr); 59 puts("Core: "); 60 61 pvr = get_pvr(); 62 major = PVR_E600_MAJ(pvr); 63 minor = PVR_E600_MIN(pvr); 64 65 printf("e600 Core %d", (msscr0 & 0x20) ? 1 : 0); 66 if (gur->pordevsr & MPC86xx_PORDEVSR_CORE1TE) 67 puts("\n Core1Translation Enabled"); 68 debug(" (MSSCR0=%x, PORDEVSR=%x)", msscr0, gur->pordevsr); 69 70 printf(", Version: %d.%d, (0x%08x)\n", major, minor, pvr); 71 72 get_sys_info(&sysinfo); 73 74 puts("Clock Configuration:\n"); 75 printf(" CPU:%-4s MHz, ", strmhz(buf1, sysinfo.freq_processor)); 76 printf("MPX:%-4s MHz\n", strmhz(buf1, sysinfo.freq_systembus)); 77 printf(" DDR:%-4s MHz (%s MT/s data rate), ", 78 strmhz(buf1, sysinfo.freq_systembus / 2), 79 strmhz(buf2, sysinfo.freq_systembus)); 80 81 if (sysinfo.freq_localbus > LCRR_CLKDIV) { 82 printf("LBC:%-4s MHz\n", strmhz(buf1, sysinfo.freq_localbus)); 83 } else { 84 printf("LBC: unknown (LCRR[CLKDIV] = 0x%02lx)\n", 85 sysinfo.freq_localbus); 86 } 87 88 puts("L1: D-cache 32 KiB enabled\n"); 89 puts(" I-cache 32 KiB enabled\n"); 90 91 puts("L2: "); 92 if (get_l2cr() & 0x80000000) { 93 #if defined(CONFIG_MPC8610) 94 puts("256"); 95 #elif defined(CONFIG_MPC8641) 96 puts("512"); 97 #endif 98 puts(" KiB enabled\n"); 99 } else { 100 puts("Disabled\n"); 101 } 102 103 return 0; 104 } 105 106 107 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 108 { 109 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; 110 volatile ccsr_gur_t *gur = &immap->im_gur; 111 112 /* Attempt board-specific reset */ 113 board_reset(); 114 115 /* Next try asserting HRESET_REQ */ 116 out_be32(&gur->rstcr, MPC86xx_RSTCR_HRST_REQ); 117 118 while (1) 119 ; 120 121 return 1; 122 } 123 124 125 /* 126 * Get timebase clock frequency 127 */ 128 unsigned long 129 get_tbclk(void) 130 { 131 sys_info_t sys_info; 132 133 get_sys_info(&sys_info); 134 return (sys_info.freq_systembus + 3L) / 4L; 135 } 136 137 138 #if defined(CONFIG_WATCHDOG) 139 void 140 watchdog_reset(void) 141 { 142 #if defined(CONFIG_MPC8610) 143 /* 144 * This actually feed the hard enabled watchdog. 145 */ 146 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; 147 volatile ccsr_wdt_t *wdt = &immap->im_wdt; 148 volatile ccsr_gur_t *gur = &immap->im_gur; 149 u32 tmp = gur->pordevsr; 150 151 if (tmp & 0x4000) { 152 wdt->swsrr = 0x556c; 153 wdt->swsrr = 0xaa39; 154 } 155 #endif 156 } 157 #endif /* CONFIG_WATCHDOG */ 158 159 /* 160 * Print out the state of various machine registers. 161 * Currently prints out LAWs, BR0/OR0, and BATs 162 */ 163 void mpc86xx_reginfo(void) 164 { 165 print_bats(); 166 print_laws(); 167 print_lbc_regs(); 168 } 169 170 /* 171 * Set the DDR BATs to reflect the actual size of DDR. 172 * 173 * dram_size is the actual size of DDR, in bytes 174 * 175 * Note: we assume that CONFIG_MAX_MEM_MAPPED is 2G or smaller as we only 176 * are using a single BAT to cover DDR. 177 * 178 * If this is not true, (e.g. CONFIG_MAX_MEM_MAPPED is 2GB but HID0_XBSEN 179 * is not defined) then we might have a situation where U-Boot will attempt 180 * to relocated itself outside of the region mapped by DBAT0. 181 * This will cause a machine check. 182 * 183 * Currently we are limited to power of two sized DDR since we only use a 184 * single bat. If a non-power of two size is used that is less than 185 * CONFIG_MAX_MEM_MAPPED u-boot will crash. 186 * 187 */ 188 void setup_ddr_bat(phys_addr_t dram_size) 189 { 190 unsigned long batu, bl; 191 192 bl = TO_BATU_BL(min(dram_size, CONFIG_MAX_MEM_MAPPED)); 193 194 if (BATU_SIZE(bl) != dram_size) { 195 u64 sz = (u64)dram_size - BATU_SIZE(bl); 196 print_size(sz, " left unmapped\n"); 197 } 198 199 batu = bl | BATU_VS | BATU_VP; 200 write_bat(DBAT0, batu, CONFIG_SYS_DBAT0L); 201 write_bat(IBAT0, batu, CONFIG_SYS_IBAT0L); 202 } 203