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/**
* @file
*
* @ingroup mpc55xx
*
* @brief BSP early initialization code.
*/
/*
* Copyright (c) 2008-2011 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Obere Lagerstr. 30
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#include <bsp/mpc55xx-config.h>
#include <bsp/linker-symbols.h>
#include <bsp/start.h>
#include <bsp.h>
#include <mpc55xx/mpc55xx.h>
#include <string.h>
#ifdef MPC55XX_BOOTFLAGS
extern uint32_t mpc55xx_bootflag_0 [];
#endif
static void BSP_START_TEXT_SECTION mpc55xx_siu_init(void)
{
size_t i = 0;
#if defined(MPC55XX_BOARD_GWLCFM)
SIU.GPDO[122].B.PDO=1; /* make sure USB reset is kept high */
SIU.GPDO[121].B.PDO=1; /* make sure Ethernet reset is kept high */
SIU.GPDO[113].B.PDO=1; /* make sure MOST Companion reset is kept high */
#endif
for (i = 0; i < mpc55xx_siu_pcr_config_count [0]; ++i) {
const mpc55xx_siu_pcr_config_entry *e = &mpc55xx_siu_pcr_config [i];
int j = e->index;
int n = j + e->count;
uint32_t pcr = e->pcr.R;
while (j < n) {
SIU.PCR [j].R = pcr;
++j;
}
}
}
static void BSP_START_TEXT_SECTION mpc55xx_ebi_chip_select_init(void)
{
size_t i = 0;
for (i = 0; i < mpc55xx_ebi_cs_config_count [0]; ++i) {
EBI.CS [i] = mpc55xx_ebi_cs_config [i];
}
for (i = 0; i < mpc55xx_ebi_cal_cs_config_count [0]; ++i) {
EBI.CAL_CS [i] = mpc55xx_ebi_cal_cs_config [i];
}
}
static void BSP_START_TEXT_SECTION mpc55xx_ebi_init(void)
{
#if defined(MPC55XX_BOARD_GWLCFM)
/*
* init EBI for Muxed AD bus
*/
EBI.MCR.B.DBM = 1;
EBI.MCR.B.AD_MUX = 1; /* use multiplexed bus */
EBI.MCR.B.D16_31 = 1; /* use lower AD bus */
SIU.ECCR.B.EBDF = 3; /* use CLK/4 as bus clock */
#elif defined(MPC55XX_BOARD_MPC5674FEVB)
struct EBI_tag ebi = {
.MCR = {
.B = {
.ACGE = 0,
.MDIS = 0,
.D16_31 = 0,
.AD_MUX = 0,
.DBM = 0
}
}
};
EBI.MCR.R = ebi.MCR.R;
#endif
}
static void BSP_START_TEXT_SECTION mpc55xx_mmu_init(void)
{
#ifdef MPC55XX_BOOTFLAGS
/* If the low bit of bootflag 0 is clear don't change the MMU. */
bool do_mmu_init = (mpc55xx_bootflag_0 [0] & 1) != 0;
#else
bool do_mmu_init = true;
#endif
if (do_mmu_init) {
size_t i = 0;
for (i = 0; i < mpc55xx_mmu_config_count [0]; ++i) {
const struct MMU_tag *tag = &mpc55xx_mmu_config [i];
PPC_SET_SPECIAL_PURPOSE_REGISTER( FSL_EIS_MAS0, tag->MAS0.R);
PPC_SET_SPECIAL_PURPOSE_REGISTER( FSL_EIS_MAS1, tag->MAS1.R);
PPC_SET_SPECIAL_PURPOSE_REGISTER( FSL_EIS_MAS2, tag->MAS2.R);
PPC_SET_SPECIAL_PURPOSE_REGISTER( FSL_EIS_MAS3, tag->MAS3.R);
__asm__ volatile ("tlbwe");
}
}
}
static void BSP_START_TEXT_SECTION mpc55xx_load_section(
void *dst,
const void *src,
size_t n
)
{
if (dst != src) {
memcpy(dst, src, n);
}
}
void BSP_START_TEXT_SECTION mpc55xx_early_init(void)
{
mpc55xx_load_section(
&bsp_section_fast_text_begin [0],
&bsp_section_fast_text_load_begin [0],
(size_t) bsp_section_fast_text_size
);
mpc55xx_load_section(
&bsp_section_fast_data_begin [0],
&bsp_section_fast_data_load_begin [0],
(size_t) bsp_section_fast_data_size
);
mpc55xx_load_section(
&bsp_section_data_begin [0],
&bsp_section_data_load_begin [0],
(size_t) bsp_section_data_size
);
mpc55xx_siu_init();
mpc55xx_ebi_chip_select_init();
mpc55xx_ebi_init();
mpc55xx_mmu_init();
}
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