3 * Marvell Semiconductor <www.marvell.com>
4 * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
28 #include <asm/arch/cpu.h>
29 #include <asm/arch/kirkwood.h>
31 DECLARE_GLOBAL_DATA_PTR;
33 struct kw_sdram_bank {
38 struct kw_sdram_addr_dec {
39 struct kw_sdram_bank sdram_bank[4];
43 * kw_sdram_bar - reads SDRAM Base Address Register
45 u32 kw_sdram_bar(enum memory_bank bank)
47 struct kw_sdram_addr_dec *base =
48 (struct kw_sdram_addr_dec *)KW_REGISTER(0x1500);
50 u32 enable = 0x01 & readl(&base->sdram_bank[bank].win_sz);
52 if ((!enable) || (bank > BANK3))
55 result = readl(&base->sdram_bank[bank].win_bar);
60 * kw_sdram_bs - reads SDRAM Bank size
62 u32 kw_sdram_bs(enum memory_bank bank)
64 struct kw_sdram_addr_dec *base =
65 (struct kw_sdram_addr_dec *)KW_REGISTER(0x1500);
67 u32 enable = 0x01 & readl(&base->sdram_bank[bank].win_sz);
69 if ((!enable) || (bank > BANK3))
71 result = 0xff000000 & readl(&base->sdram_bank[bank].win_sz);
76 #ifndef CONFIG_SYS_BOARD_DRAM_INIT
82 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
83 gd->bd->bi_dram[i].start = kw_sdram_bar(i);
84 gd->bd->bi_dram[i].size = kw_sdram_bs(i);
86 * It is assumed that all memory banks are consecutive
88 * If the gap is found, ram_size will be reported for
89 * consecutive memory only
91 if (gd->bd->bi_dram[i].start != gd->ram_size)
94 gd->ram_size += gd->bd->bi_dram[i].size;
98 for (; i < CONFIG_NR_DRAM_BANKS; i++) {
99 /* If above loop terminated prematurely, we need to set
100 * remaining banks' start address & size as 0. Otherwise other
101 * u-boot functions and Linux kernel gets wrong values which
102 * could result in crash */
103 gd->bd->bi_dram[i].start = 0;
104 gd->bd->bi_dram[i].size = 0;
111 * If this function is not defined here,
112 * board.c alters dram bank zero configuration defined above.
114 void dram_init_banksize(void)
118 #endif /* CONFIG_SYS_BOARD_DRAM_INIT */