law.c

U-BOOT,著名的Bootloader程序

/*
 * Copyright 2008 Freescale Semiconductor, Inc.
 *
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, [e-mail].
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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/fsl_law.h>
#include <asm/mmu.h>

/*
 * LAW(Local Access Window) configuration:
 *
 * 0x0000_0000     0x7fff_ffff     DDR                     2G
 * 0x8000_0000     0x9fff_ffff     PCI1 MEM                512M
 * 0xa000_0000     0xbfff_ffff     PCIe MEM                512M
 * 0xc000_0000     0xdfff_ffff     RapidIO                 512M
 * 0xe000_0000     0xe000_ffff     CCSR                    1M
 * 0xe200_0000     0xe10f_ffff     PCI1 IO                 1M
 * 0xe280_0000     0xe20f_ffff     PCI2 IO                 1M
 * 0xe300_0000     0xe30f_ffff     PCIe IO                 1M
 * 0xf000_0000     0xf3ff_ffff     SDRAM                   64M
 * 0xf800_0000     0xf80f_ffff     NVRAM/CADMUS (*)        1M
 * 0xff00_0000     0xff7f_ffff     FLASH (2nd bank)        8M
 * 0xff80_0000     0xffff_ffff     FLASH (boot bank)       8M
 *
 * Notes:
 *    CCSRBAR and L2-as-SRAM don't need a configured Local Access Window.
 *    If flash is 8M at default position (last 8M), no LAW needed.
 *
 * LAW 0 is reserved for boot mapping
 */

struct law_entry law_table[] = {
#ifdef CFG_PCI1_MEM_PHYS
	SET_LAW(CFG_PCI1_MEM_PHYS, LAW_SIZE_512M, LAW_TRGT_IF_PCI),
	SET_LAW(CFG_PCI1_IO_PHYS, LAW_SIZE_1M, LAW_TRGT_IF_PCI),
#endif
#ifdef CFG_PCI2_MEM_PHYS
	SET_LAW(CFG_PCI2_MEM_PHYS, LAW_SIZE_512M, LAW_TRGT_IF_PCI_2),
	SET_LAW(CFG_PCI2_IO_PHYS, LAW_SIZE_1M, LAW_TRGT_IF_PCI_2),
#endif
#ifdef CFG_PCIE1_MEM_PHYS
	SET_LAW(CFG_PCIE1_MEM_PHYS, LAW_SIZE_512M, LAW_TRGT_IF_PCIE_1),
	SET_LAW(CFG_PCIE1_IO_PHYS, LAW_SIZE_1M, LAW_TRGT_IF_PCIE_1),
#endif
	/* LBC window - maps 256M 0xf0000000 -> 0xffffffff */
	SET_LAW(CFG_LBC_SDRAM_BASE, LAW_SIZE_256M, LAW_TRGT_IF_LBC),
#ifdef CFG_RIO_MEM_PHYS
	SET_LAW(CFG_RIO_MEM_PHYS, LAW_SIZE_512M, LAW_TRGT_IF_RIO),
#endif
};

int num_law_entries = ARRAY_SIZE(law_table);