u-boot/arch/powerpc/cpu/mpc83xx/spl_minimal.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

91 lines
2.3 KiB
C

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