1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2000-2002 4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 5 */ 6 7 #include <common.h> 8 #include <watchdog.h> 9 10 #include <mpc8xx.h> 11 #include <asm/cpm_8xx.h> 12 #include <asm/io.h> 13 14 /* 15 * Breath some life into the CPU... 16 * 17 * Set up the memory map, 18 * initialize a bunch of registers, 19 * initialize the UPM's 20 */ 21 void cpu_init_f(immap_t __iomem *immr) 22 { 23 memctl8xx_t __iomem *memctl = &immr->im_memctl; 24 ulong reg; 25 26 /* SYPCR - contains watchdog control (11-9) */ 27 28 #ifndef CONFIG_HW_WATCHDOG 29 /* deactivate watchdog if not enabled in config */ 30 out_be32(&immr->im_siu_conf.sc_sypcr, CONFIG_SYS_SYPCR & ~SYPCR_SWE); 31 #endif 32 33 WATCHDOG_RESET(); 34 35 /* SIUMCR - contains debug pin configuration (11-6) */ 36 setbits_be32(&immr->im_siu_conf.sc_siumcr, CONFIG_SYS_SIUMCR); 37 /* initialize timebase status and control register (11-26) */ 38 /* unlock TBSCRK */ 39 40 out_be32(&immr->im_sitk.sitk_tbscrk, KAPWR_KEY); 41 out_be16(&immr->im_sit.sit_tbscr, CONFIG_SYS_TBSCR | TBSCR_TBE); 42 43 /* Unlock timebase register */ 44 out_be32(&immr->im_sitk.sitk_tbk, KAPWR_KEY); 45 46 /* initialize the PIT (11-31) */ 47 48 out_be32(&immr->im_sitk.sitk_piscrk, KAPWR_KEY); 49 out_be16(&immr->im_sit.sit_piscr, CONFIG_SYS_PISCR); 50 51 /* System integration timers. Don't change EBDF! (15-27) */ 52 53 out_be32(&immr->im_clkrstk.cark_sccrk, KAPWR_KEY); 54 clrsetbits_be32(&immr->im_clkrst.car_sccr, ~CONFIG_SYS_SCCR_MASK, 55 CONFIG_SYS_SCCR); 56 57 /* 58 * MPC866/885 ERRATA GLL2 59 * Description: 60 * In 1:2:1 mode, when HRESET is detected at the positive edge of 61 * EXTCLK, then there will be a loss of phase between 62 * EXTCLK and CLKOUT. 63 * 64 * Workaround: 65 * Reprogram the SCCR: 66 * 1. Write 1'b00 to SCCR[EBDF]. 67 * 2. Write 1'b01 to SCCR[EBDF]. 68 * 3. Rewrite the desired value to the PLPRCR register. 69 */ 70 reg = in_be32(&immr->im_clkrst.car_sccr); 71 /* Are we in mode 1:2:1 ? */ 72 if ((reg & SCCR_EBDF11) == SCCR_EBDF01) { 73 clrbits_be32(&immr->im_clkrst.car_sccr, SCCR_EBDF11); 74 setbits_be32(&immr->im_clkrst.car_sccr, SCCR_EBDF01); 75 } 76 77 /* PLL (CPU clock) settings (15-30) */ 78 79 out_be32(&immr->im_clkrstk.cark_plprcrk, KAPWR_KEY); 80 81 /* If CONFIG_SYS_PLPRCR (set in the various *_config.h files) tries to 82 * set the MF field, then just copy CONFIG_SYS_PLPRCR over car_plprcr, 83 * otherwise OR in CONFIG_SYS_PLPRCR so we do not change the current MF 84 * field value. 85 * 86 * For newer (starting MPC866) chips PLPRCR layout is different. 87 */ 88 #ifdef CONFIG_SYS_PLPRCR 89 if ((CONFIG_SYS_PLPRCR & PLPRCR_MFACT_MSK) != 0) /* reset control bits*/ 90 out_be32(&immr->im_clkrst.car_plprcr, CONFIG_SYS_PLPRCR); 91 else /* isolate MF-related fields and reset control bits */ 92 clrsetbits_be32(&immr->im_clkrst.car_plprcr, ~PLPRCR_MFACT_MSK, 93 CONFIG_SYS_PLPRCR); 94 #endif 95 96 /* 97 * Memory Controller: 98 */ 99 100 /* Clear everything except Port Size bits & add the "Bank Valid" bit */ 101 clrsetbits_be32(&memctl->memc_br0, ~BR_PS_MSK, BR_V); 102 103 /* Map banks 0 (and maybe 1) to the FLASH banks 0 (and 1) at 104 * preliminary addresses - these have to be modified later 105 * when FLASH size has been determined 106 * 107 * Depending on the size of the memory region defined by 108 * CONFIG_SYS_OR0_REMAP some boards (wide address mask) allow to map the 109 * CONFIG_SYS_MONITOR_BASE, while others (narrower address mask) can't 110 * map CONFIG_SYS_MONITOR_BASE. 111 * 112 * For example, for CONFIG_IVMS8, the CONFIG_SYS_MONITOR_BASE is 113 * 0xff000000, but CONFIG_SYS_OR0_REMAP's address mask is 0xfff80000. 114 * 115 * If BR0 wasn't loaded with address base 0xff000000, then BR0's 116 * base address remains as 0x00000000. However, the address mask 117 * have been narrowed to 512Kb, so CONFIG_SYS_MONITOR_BASE wasn't mapped 118 * into the Bank0. 119 * 120 * This is why CONFIG_IVMS8 and similar boards must load BR0 with 121 * CONFIG_SYS_BR0_PRELIM in advance. 122 * 123 * [Thanks to Michael Liao for this explanation. 124 * I owe him a free beer. - wd] 125 */ 126 127 #if defined(CONFIG_SYS_OR0_REMAP) 128 out_be32(&memctl->memc_or0, CONFIG_SYS_OR0_REMAP); 129 #endif 130 #if defined(CONFIG_SYS_OR1_REMAP) 131 out_be32(&memctl->memc_or1, CONFIG_SYS_OR1_REMAP); 132 #endif 133 #if defined(CONFIG_SYS_OR5_REMAP) 134 out_be32(&memctl->memc_or5, CONFIG_SYS_OR5_REMAP); 135 #endif 136 137 /* now restrict to preliminary range */ 138 out_be32(&memctl->memc_br0, CONFIG_SYS_BR0_PRELIM); 139 out_be32(&memctl->memc_or0, CONFIG_SYS_OR0_PRELIM); 140 141 #if (defined(CONFIG_SYS_OR1_PRELIM) && defined(CONFIG_SYS_BR1_PRELIM)) 142 out_be32(&memctl->memc_or1, CONFIG_SYS_OR1_PRELIM); 143 out_be32(&memctl->memc_br1, CONFIG_SYS_BR1_PRELIM); 144 #endif 145 146 #if defined(CONFIG_SYS_OR2_PRELIM) && defined(CONFIG_SYS_BR2_PRELIM) 147 out_be32(&memctl->memc_or2, CONFIG_SYS_OR2_PRELIM); 148 out_be32(&memctl->memc_br2, CONFIG_SYS_BR2_PRELIM); 149 #endif 150 151 #if defined(CONFIG_SYS_OR3_PRELIM) && defined(CONFIG_SYS_BR3_PRELIM) 152 out_be32(&memctl->memc_or3, CONFIG_SYS_OR3_PRELIM); 153 out_be32(&memctl->memc_br3, CONFIG_SYS_BR3_PRELIM); 154 #endif 155 156 #if defined(CONFIG_SYS_OR4_PRELIM) && defined(CONFIG_SYS_BR4_PRELIM) 157 out_be32(&memctl->memc_or4, CONFIG_SYS_OR4_PRELIM); 158 out_be32(&memctl->memc_br4, CONFIG_SYS_BR4_PRELIM); 159 #endif 160 161 #if defined(CONFIG_SYS_OR5_PRELIM) && defined(CONFIG_SYS_BR5_PRELIM) 162 out_be32(&memctl->memc_or5, CONFIG_SYS_OR5_PRELIM); 163 out_be32(&memctl->memc_br5, CONFIG_SYS_BR5_PRELIM); 164 #endif 165 166 #if defined(CONFIG_SYS_OR6_PRELIM) && defined(CONFIG_SYS_BR6_PRELIM) 167 out_be32(&memctl->memc_or6, CONFIG_SYS_OR6_PRELIM); 168 out_be32(&memctl->memc_br6, CONFIG_SYS_BR6_PRELIM); 169 #endif 170 171 #if defined(CONFIG_SYS_OR7_PRELIM) && defined(CONFIG_SYS_BR7_PRELIM) 172 out_be32(&memctl->memc_or7, CONFIG_SYS_OR7_PRELIM); 173 out_be32(&memctl->memc_br7, CONFIG_SYS_BR7_PRELIM); 174 #endif 175 176 /* 177 * Reset CPM 178 */ 179 out_be16(&immr->im_cpm.cp_cpcr, CPM_CR_RST | CPM_CR_FLG); 180 /* Spin until command processed */ 181 while (in_be16(&immr->im_cpm.cp_cpcr) & CPM_CR_FLG) 182 ; 183 } 184 185 /* 186 * initialize higher level parts of CPU like timers 187 */ 188 int cpu_init_r(void) 189 { 190 return 0; 191 } 192