mirror of
https://github.com/AsahiLinux/u-boot
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96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
/*
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* Copyright (C) 2004-2008 Freescale Semiconductor, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <mpc83xx.h>
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* Breathe some life into the CPU...
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*
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* Set up the memory map,
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* initialize a bunch of registers,
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* initialize the UPM's
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*/
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void cpu_init_f (volatile immap_t * im)
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{
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int i;
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/* Pointer is writable since we allocated a register for it */
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gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
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/* Clear initial global data */
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for (i = 0; i < sizeof(gd_t); i++)
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((char *)gd)[i] = 0;
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/* system performance tweaking */
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#ifdef CONFIG_SYS_ACR_PIPE_DEP
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/* Arbiter pipeline depth */
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im->arbiter.acr = (im->arbiter.acr & ~ACR_PIPE_DEP) |
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(CONFIG_SYS_ACR_PIPE_DEP << ACR_PIPE_DEP_SHIFT);
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#endif
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#ifdef CONFIG_SYS_ACR_RPTCNT
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/* Arbiter repeat count */
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im->arbiter.acr = (im->arbiter.acr & ~(ACR_RPTCNT)) |
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(CONFIG_SYS_ACR_RPTCNT << ACR_RPTCNT_SHIFT);
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#endif
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#ifdef CONFIG_SYS_SPCR_OPT
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/* Optimize transactions between CSB and other devices */
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im->sysconf.spcr = (im->sysconf.spcr & ~SPCR_OPT) |
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(CONFIG_SYS_SPCR_OPT << SPCR_OPT_SHIFT);
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#endif
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/* Enable Time Base & Decrementer (so we will have udelay()) */
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im->sysconf.spcr |= SPCR_TBEN;
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/* DDR control driver register */
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#ifdef CONFIG_SYS_DDRCDR
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im->sysconf.ddrcdr = CONFIG_SYS_DDRCDR;
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#endif
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/* Output buffer impedance register */
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#ifdef CONFIG_SYS_OBIR
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im->sysconf.obir = CONFIG_SYS_OBIR;
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#endif
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/*
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* Memory Controller:
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*/
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/* Map banks 0 and 1 to the FLASH banks 0 and 1 at preliminary
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* addresses - these have to be modified later when FLASH size
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* has been determined
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*/
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#if defined(CONFIG_SYS_NAND_BR_PRELIM) \
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&& defined(CONFIG_SYS_NAND_OR_PRELIM) \
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&& defined(CONFIG_SYS_NAND_LBLAWBAR_PRELIM) \
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&& defined(CONFIG_SYS_NAND_LBLAWAR_PRELIM)
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set_lbc_br(0, CONFIG_SYS_NAND_BR_PRELIM);
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set_lbc_or(0, CONFIG_SYS_NAND_OR_PRELIM);
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im->sysconf.lblaw[0].bar = CONFIG_SYS_NAND_LBLAWBAR_PRELIM;
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im->sysconf.lblaw[0].ar = CONFIG_SYS_NAND_LBLAWAR_PRELIM;
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#else
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#error CONFIG_SYS_NAND_BR_PRELIM, CONFIG_SYS_NAND_OR_PRELIM, CONFIG_SYS_NAND_LBLAWBAR_PRELIM & CONFIG_SYS_NAND_LBLAWAR_PRELIM must be defined
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#endif
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}
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/*
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* Get timebase clock frequency (like cpu_clk in Hz)
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*/
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unsigned long get_tbclk(void)
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{
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return (gd->bus_clk + 3L) / 4L;
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}
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void puts(const char *str)
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{
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while (*str)
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putc(*str++);
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}
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