u-boot/arch/powerpc/cpu/mpc85xx/cpu_init_early.c

/*
 * Copyright 2009 Freescale Semiconductor, Inc
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <asm/processor.h>
#include <asm/mmu.h>
#include <asm/fsl_law.h>

DECLARE_GLOBAL_DATA_PTR;

#if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR_PHYS)
#ifdef CONFIG_FSL_CORENET
static void setup_ccsrbar(void)
{
	u32 temp;
	volatile u32 *ccsr_virt = (volatile u32 *)(CONFIG_SYS_CCSRBAR + 0x1000);
	volatile ccsr_local_t *ccm;

	/*
	 * We can't call set_law() because we haven't moved
	 * CCSR yet.
	 */
	ccm = (void *)ccsr_virt;

	out_be32(&ccm->law[0].lawbarh,
		(u64)CONFIG_SYS_CCSRBAR_PHYS >> 32);
	out_be32(&ccm->law[0].lawbarl, (u32)CONFIG_SYS_CCSRBAR_PHYS);
	out_be32(&ccm->law[0].lawar,
		LAW_EN | (0x1e << 20) | LAW_SIZE_4K);

	in_be32((u32 *)(ccsr_virt + 0));
	in_be32((u32 *)(ccsr_virt + 1));
	isync();

	ccm = (void *)CONFIG_SYS_CCSRBAR;
	/* Now use the temporary LAW to move CCSR */
	out_be32(&ccm->ccsrbarh, (u64)CONFIG_SYS_CCSRBAR_PHYS >> 32);
	out_be32(&ccm->ccsrbarl, (u32)CONFIG_SYS_CCSRBAR_PHYS);
	out_be32(&ccm->ccsrar, CCSRAR_C);
	temp = in_be32(&ccm->ccsrar);
	disable_law(0);
}
#else
static void setup_ccsrbar(void)
{
	u32 temp;
	volatile u32 *ccsr_virt = (volatile u32 *)(CONFIG_SYS_CCSRBAR + 0x1000);

	temp = in_be32(ccsr_virt);
	out_be32(ccsr_virt, CONFIG_SYS_CCSRBAR_PHYS >> 12);
	temp = in_be32((volatile u32 *)CONFIG_SYS_CCSRBAR);
}
#endif
#endif

/* We run cpu_init_early_f in AS = 1 */
void cpu_init_early_f(void)
{
	u32 mas0, mas1, mas2, mas3, mas7;
	int i;

	/* Pointer is writable since we allocated a register for it */
	gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);

	/*
	 * Clear initial global data
	 *   we don't use memset so we can share this code with NAND_SPL
	 */
	for (i = 0; i < sizeof(gd_t); i++)
		((char *)gd)[i] = 0;

	mas0 = MAS0_TLBSEL(0) | MAS0_ESEL(0);
	mas1 = MAS1_VALID | MAS1_TID(0) | MAS1_TS | MAS1_TSIZE(BOOKE_PAGESZ_4K);
	mas2 = FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR, MAS2_I|MAS2_G);
	mas3 = FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_PHYS, 0, MAS3_SW|MAS3_SR);
	mas7 = FSL_BOOKE_MAS7(CONFIG_SYS_CCSRBAR_PHYS);

	write_tlb(mas0, mas1, mas2, mas3, mas7);

	/* set up CCSR if we want it moved */
#if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR_PHYS)
	mas0 = MAS0_TLBSEL(0) | MAS0_ESEL(1);
	/* mas1 is the same as above */
	mas2 = FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR + 0x1000, MAS2_I|MAS2_G);
	mas3 = FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_DEFAULT, 0, MAS3_SW|MAS3_SR);
	mas7 = FSL_BOOKE_MAS7(CONFIG_SYS_CCSRBAR_DEFAULT);

	write_tlb(mas0, mas1, mas2, mas3, mas7);

	setup_ccsrbar();
#endif

	init_laws();
	invalidate_tlb(0);
	init_tlbs();
}