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https://github.com/brain-hackers/u-boot-brain
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ba04f70109
LAWs have the concept of priority so its useful to be able to allocate the lowest (highest number) priority. We will end up using this with the new DDR code. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
141 lines
3.3 KiB
C
141 lines
3.3 KiB
C
/*
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* Copyright 2008 Freescale Semiconductor, Inc.
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*
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* (C) Copyright 2000
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/fsl_law.h>
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#include <asm/io.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define LAWAR_EN 0x80000000
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/* number of LAWs in the hw implementation */
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#if defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
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defined(CONFIG_MPC8560) || defined(CONFIG_MPC8555)
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#define FSL_HW_NUM_LAWS 8
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#elif defined(CONFIG_MPC8548) || defined(CONFIG_MPC8544) || \
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defined(CONFIG_MPC8568) || \
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defined(CONFIG_MPC8641) || defined(CONFIG_MPC8610)
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#define FSL_HW_NUM_LAWS 10
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#elif defined(CONFIG_MPC8572)
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#define FSL_HW_NUM_LAWS 12
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#else
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#error FSL_HW_NUM_LAWS not defined for this platform
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#endif
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void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
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{
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volatile u32 *base = (volatile u32 *)(CFG_IMMR + 0xc08);
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volatile u32 *lawbar = base + 8 * idx;
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volatile u32 *lawar = base + 8 * idx + 2;
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gd->used_laws |= (1 << idx);
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out_be32(lawbar, addr >> 12);
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out_be32(lawar, LAWAR_EN | ((u32)id << 20) | (u32)sz);
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return ;
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}
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int set_next_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
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{
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u32 idx = ffz(gd->used_laws);
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if (idx >= FSL_HW_NUM_LAWS)
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return -1;
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set_law(idx, addr, sz, id);
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return idx;
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}
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int set_last_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
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{
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u32 idx;
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/* we have no LAWs free */
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if (gd->used_laws == -1)
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return -1;
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/* grab the last free law */
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idx = __ilog2(~(gd->used_laws));
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if (idx >= FSL_HW_NUM_LAWS)
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return -1;
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set_law(idx, addr, sz, id);
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return idx;
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}
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void disable_law(u8 idx)
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{
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volatile u32 *base = (volatile u32 *)(CFG_IMMR + 0xc08);
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volatile u32 *lawbar = base + 8 * idx;
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volatile u32 *lawar = base + 8 * idx + 2;
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gd->used_laws &= ~(1 << idx);
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out_be32(lawar, 0);
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out_be32(lawbar, 0);
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return;
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}
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void print_laws(void)
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{
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volatile u32 *base = (volatile u32 *)(CFG_IMMR + 0xc08);
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volatile u32 *lawbar = base;
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volatile u32 *lawar = base + 2;
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int i;
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printf("\nLocal Access Window Configuration\n");
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for(i = 0; i < FSL_HW_NUM_LAWS; i++) {
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printf("\tLAWBAR%d : 0x%08x, LAWAR%d : 0x%08x\n",
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i, in_be32(lawbar), i, in_be32(lawar));
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lawbar += 8;
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lawar += 8;
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}
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return;
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}
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void init_laws(void)
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{
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int i;
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gd->used_laws = ~((1 << FSL_HW_NUM_LAWS) - 1);
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for (i = 0; i < num_law_entries; i++) {
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if (law_table[i].index == -1)
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set_next_law(law_table[i].addr, law_table[i].size,
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law_table[i].trgt_id);
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else
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set_law(law_table[i].index, law_table[i].addr,
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law_table[i].size, law_table[i].trgt_id);
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}
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return ;
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}
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