mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-19 16:38:53 +09:00
280 lines
6.1 KiB
C
280 lines
6.1 KiB
C
/*
|
|
* Copyright 2008-2011 Freescale Semiconductor, Inc.
|
|
*
|
|
* (C) Copyright 2000
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* 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 <linux/compiler.h>
|
|
#include <asm/fsl_law.h>
|
|
#include <asm/io.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#define FSL_HW_NUM_LAWS CONFIG_SYS_FSL_NUM_LAWS
|
|
|
|
#ifdef CONFIG_FSL_CORENET
|
|
#define LAW_BASE (CONFIG_SYS_FSL_CORENET_CCM_ADDR)
|
|
#define LAWAR_ADDR(x) (&((ccsr_local_t *)LAW_BASE)->law[x].lawar)
|
|
#define LAWBARH_ADDR(x) (&((ccsr_local_t *)LAW_BASE)->law[x].lawbarh)
|
|
#define LAWBARL_ADDR(x) (&((ccsr_local_t *)LAW_BASE)->law[x].lawbarl)
|
|
#define LAWBAR_SHIFT 0
|
|
#else
|
|
#define LAW_BASE (CONFIG_SYS_IMMR + 0xc08)
|
|
#define LAWAR_ADDR(x) ((u32 *)LAW_BASE + 8 * x + 2)
|
|
#define LAWBAR_ADDR(x) ((u32 *)LAW_BASE + 8 * x)
|
|
#define LAWBAR_SHIFT 12
|
|
#endif
|
|
|
|
|
|
static inline phys_addr_t get_law_base_addr(int idx)
|
|
{
|
|
#ifdef CONFIG_FSL_CORENET
|
|
return (phys_addr_t)
|
|
((u64)in_be32(LAWBARH_ADDR(idx)) << 32) |
|
|
in_be32(LAWBARL_ADDR(idx));
|
|
#else
|
|
return (phys_addr_t)in_be32(LAWBAR_ADDR(idx)) << LAWBAR_SHIFT;
|
|
#endif
|
|
}
|
|
|
|
static inline void set_law_base_addr(int idx, phys_addr_t addr)
|
|
{
|
|
#ifdef CONFIG_FSL_CORENET
|
|
out_be32(LAWBARL_ADDR(idx), addr & 0xffffffff);
|
|
out_be32(LAWBARH_ADDR(idx), (u64)addr >> 32);
|
|
#else
|
|
out_be32(LAWBAR_ADDR(idx), addr >> LAWBAR_SHIFT);
|
|
#endif
|
|
}
|
|
|
|
void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
|
|
{
|
|
gd->used_laws |= (1 << idx);
|
|
|
|
out_be32(LAWAR_ADDR(idx), 0);
|
|
set_law_base_addr(idx, addr);
|
|
out_be32(LAWAR_ADDR(idx), LAW_EN | ((u32)id << 20) | (u32)sz);
|
|
|
|
/* Read back so that we sync the writes */
|
|
in_be32(LAWAR_ADDR(idx));
|
|
}
|
|
|
|
void disable_law(u8 idx)
|
|
{
|
|
gd->used_laws &= ~(1 << idx);
|
|
|
|
out_be32(LAWAR_ADDR(idx), 0);
|
|
set_law_base_addr(idx, 0);
|
|
|
|
/* Read back so that we sync the writes */
|
|
in_be32(LAWAR_ADDR(idx));
|
|
|
|
return;
|
|
}
|
|
|
|
#ifndef CONFIG_NAND_SPL
|
|
static int get_law_entry(u8 i, struct law_entry *e)
|
|
{
|
|
u32 lawar;
|
|
|
|
lawar = in_be32(LAWAR_ADDR(i));
|
|
|
|
if (!(lawar & LAW_EN))
|
|
return 0;
|
|
|
|
e->addr = get_law_base_addr(i);
|
|
e->size = lawar & 0x3f;
|
|
e->trgt_id = (lawar >> 20) & 0xff;
|
|
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
int set_next_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
|
|
{
|
|
u32 idx = ffz(gd->used_laws);
|
|
|
|
if (idx >= FSL_HW_NUM_LAWS)
|
|
return -1;
|
|
|
|
set_law(idx, addr, sz, id);
|
|
|
|
return idx;
|
|
}
|
|
|
|
#ifndef CONFIG_NAND_SPL
|
|
int set_last_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
|
|
{
|
|
u32 idx;
|
|
|
|
/* we have no LAWs free */
|
|
if (gd->used_laws == -1)
|
|
return -1;
|
|
|
|
/* grab the last free law */
|
|
idx = __ilog2(~(gd->used_laws));
|
|
|
|
if (idx >= FSL_HW_NUM_LAWS)
|
|
return -1;
|
|
|
|
set_law(idx, addr, sz, id);
|
|
|
|
return idx;
|
|
}
|
|
|
|
struct law_entry find_law(phys_addr_t addr)
|
|
{
|
|
struct law_entry entry;
|
|
int i;
|
|
|
|
entry.index = -1;
|
|
entry.addr = 0;
|
|
entry.size = 0;
|
|
entry.trgt_id = 0;
|
|
|
|
for (i = 0; i < FSL_HW_NUM_LAWS; i++) {
|
|
u64 upper;
|
|
|
|
if (!get_law_entry(i, &entry))
|
|
continue;
|
|
|
|
upper = entry.addr + (2ull << entry.size);
|
|
if ((addr >= entry.addr) && (addr < upper)) {
|
|
entry.index = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return entry;
|
|
}
|
|
|
|
void print_laws(void)
|
|
{
|
|
int i;
|
|
u32 lawar;
|
|
|
|
printf("\nLocal Access Window Configuration\n");
|
|
for (i = 0; i < FSL_HW_NUM_LAWS; i++) {
|
|
lawar = in_be32(LAWAR_ADDR(i));
|
|
#ifdef CONFIG_FSL_CORENET
|
|
printf("LAWBARH%02d: 0x%08x LAWBARL%02d: 0x%08x",
|
|
i, in_be32(LAWBARH_ADDR(i)),
|
|
i, in_be32(LAWBARL_ADDR(i)));
|
|
#else
|
|
printf("LAWBAR%02d: 0x%08x", i, in_be32(LAWBAR_ADDR(i)));
|
|
#endif
|
|
printf(" LAWAR%02d: 0x%08x\n", i, lawar);
|
|
printf("\t(EN: %d TGT: 0x%02x SIZE: ",
|
|
(lawar & LAW_EN) ? 1 : 0, (lawar >> 20) & 0xff);
|
|
print_size(lawar_size(lawar), ")\n");
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/* use up to 2 LAWs for DDR, used the last available LAWs */
|
|
int set_ddr_laws(u64 start, u64 sz, enum law_trgt_if id)
|
|
{
|
|
u64 start_align, law_sz;
|
|
int law_sz_enc;
|
|
|
|
if (start == 0)
|
|
start_align = 1ull << (LAW_SIZE_32G + 1);
|
|
else
|
|
start_align = 1ull << (ffs64(start) - 1);
|
|
law_sz = min(start_align, sz);
|
|
law_sz_enc = __ilog2_u64(law_sz) - 1;
|
|
|
|
if (set_last_law(start, law_sz_enc, id) < 0)
|
|
return -1;
|
|
|
|
/* recalculate size based on what was actually covered by the law */
|
|
law_sz = 1ull << __ilog2_u64(law_sz);
|
|
|
|
/* do we still have anything to map */
|
|
sz = sz - law_sz;
|
|
if (sz) {
|
|
start += law_sz;
|
|
|
|
start_align = 1ull << (ffs64(start) - 1);
|
|
law_sz = min(start_align, sz);
|
|
law_sz_enc = __ilog2_u64(law_sz) - 1;
|
|
|
|
if (set_last_law(start, law_sz_enc, id) < 0)
|
|
return -1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
|
|
/* do we still have anything to map */
|
|
sz = sz - law_sz;
|
|
if (sz)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
void init_laws(void)
|
|
{
|
|
int i;
|
|
|
|
#if FSL_HW_NUM_LAWS < 32
|
|
gd->used_laws = ~((1 << FSL_HW_NUM_LAWS) - 1);
|
|
#elif FSL_HW_NUM_LAWS == 32
|
|
gd->used_laws = 0;
|
|
#else
|
|
#error FSL_HW_NUM_LAWS can not be greater than 32 w/o code changes
|
|
#endif
|
|
|
|
/*
|
|
* Any LAWs that were set up before we booted assume they are meant to
|
|
* be around and mark them used.
|
|
*/
|
|
for (i = 0; i < FSL_HW_NUM_LAWS; i++) {
|
|
u32 lawar = in_be32(LAWAR_ADDR(i));
|
|
|
|
if (lawar & LAW_EN)
|
|
gd->used_laws |= (1 << i);
|
|
}
|
|
|
|
#if defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL)
|
|
/*
|
|
* in NAND boot we've already parsed the law_table and setup those LAWs
|
|
* so don't do it again.
|
|
*/
|
|
return;
|
|
#endif
|
|
|
|
for (i = 0; i < num_law_entries; i++) {
|
|
if (law_table[i].index == -1)
|
|
set_next_law(law_table[i].addr, law_table[i].size,
|
|
law_table[i].trgt_id);
|
|
else
|
|
set_law(law_table[i].index, law_table[i].addr,
|
|
law_table[i].size, law_table[i].trgt_id);
|
|
}
|
|
|
|
return ;
|
|
}
|