1 /* 2 * Copyright (C) 2004-2008 Freescale Semiconductor, Inc. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <mpc83xx.h> 9 10 DECLARE_GLOBAL_DATA_PTR; 11 12 /* 13 * Breathe some life into the CPU... 14 * 15 * Set up the memory map, 16 * initialize a bunch of registers, 17 * initialize the UPM's 18 */ 19 void cpu_init_f (volatile immap_t * im) 20 { 21 /* Pointer is writable since we allocated a register for it */ 22 gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET); 23 24 /* global data region was cleared in start.S */ 25 26 /* system performance tweaking */ 27 28 #ifdef CONFIG_SYS_ACR_PIPE_DEP 29 /* Arbiter pipeline depth */ 30 im->arbiter.acr = (im->arbiter.acr & ~ACR_PIPE_DEP) | 31 (CONFIG_SYS_ACR_PIPE_DEP << ACR_PIPE_DEP_SHIFT); 32 #endif 33 34 #ifdef CONFIG_SYS_ACR_RPTCNT 35 /* Arbiter repeat count */ 36 im->arbiter.acr = (im->arbiter.acr & ~(ACR_RPTCNT)) | 37 (CONFIG_SYS_ACR_RPTCNT << ACR_RPTCNT_SHIFT); 38 #endif 39 40 #ifdef CONFIG_SYS_SPCR_OPT 41 /* Optimize transactions between CSB and other devices */ 42 im->sysconf.spcr = (im->sysconf.spcr & ~SPCR_OPT) | 43 (CONFIG_SYS_SPCR_OPT << SPCR_OPT_SHIFT); 44 #endif 45 46 /* Enable Time Base & Decrementer (so we will have udelay()) */ 47 im->sysconf.spcr |= SPCR_TBEN; 48 49 /* DDR control driver register */ 50 #ifdef CONFIG_SYS_DDRCDR 51 im->sysconf.ddrcdr = CONFIG_SYS_DDRCDR; 52 #endif 53 /* Output buffer impedance register */ 54 #ifdef CONFIG_SYS_OBIR 55 im->sysconf.obir = CONFIG_SYS_OBIR; 56 #endif 57 58 /* 59 * Memory Controller: 60 */ 61 62 /* Map banks 0 and 1 to the FLASH banks 0 and 1 at preliminary 63 * addresses - these have to be modified later when FLASH size 64 * has been determined 65 */ 66 67 #if defined(CONFIG_SYS_NAND_BR_PRELIM) \ 68 && defined(CONFIG_SYS_NAND_OR_PRELIM) \ 69 && defined(CONFIG_SYS_NAND_LBLAWBAR_PRELIM) \ 70 && defined(CONFIG_SYS_NAND_LBLAWAR_PRELIM) 71 set_lbc_br(0, CONFIG_SYS_NAND_BR_PRELIM); 72 set_lbc_or(0, CONFIG_SYS_NAND_OR_PRELIM); 73 im->sysconf.lblaw[0].bar = CONFIG_SYS_NAND_LBLAWBAR_PRELIM; 74 im->sysconf.lblaw[0].ar = CONFIG_SYS_NAND_LBLAWAR_PRELIM; 75 #else 76 #error CONFIG_SYS_NAND_BR_PRELIM, CONFIG_SYS_NAND_OR_PRELIM, CONFIG_SYS_NAND_LBLAWBAR_PRELIM & CONFIG_SYS_NAND_LBLAWAR_PRELIM must be defined 77 #endif 78 } 79 80 /* 81 * Get timebase clock frequency (like cpu_clk in Hz) 82 */ 83 unsigned long get_tbclk(void) 84 { 85 return (gd->bus_clk + 3L) / 4L; 86 } 87 88 void puts(const char *str) 89 { 90 while (*str) 91 putc(*str++); 92 } 93