3 * Sergei Poselenov, Emcraft Systems, sposelenov@emcraft.com.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #include <asm/processor.h>
27 #include <asm/immap_85xx.h>
28 #include <asm/processor.h>
30 #include <spd_sdram.h>
33 #if !defined(CONFIG_SPD_EEPROM)
35 * Autodetect onboard DDR SDRAM on 85xx platforms
37 * NOTE: Some of the hardcoded values are hardware dependant,
38 * so this should be extended for other future boards
41 long int sdram_setup(int casl)
43 volatile ccsr_ddr_t *ddr = (void *)(CFG_MPC85xx_DDR_ADDR);
46 * Disable memory controller.
51 ddr->cs0_bnds = CFG_DDR_CS0_BNDS;
52 ddr->cs0_config = CFG_DDR_CS0_CONFIG;
53 ddr->timing_cfg_0 = CFG_DDR_TIMING_0;
54 ddr->timing_cfg_1 = CFG_DDR_TIMING_1;
55 ddr->timing_cfg_2 = CFG_DDR_TIMING_2;
56 ddr->sdram_mode = CFG_DDR_MODE;
57 ddr->sdram_interval = CFG_DDR_INTERVAL;
58 ddr->sdram_cfg_2 = CFG_DDR_CONFIG_2;
59 ddr->sdram_clk_cntl = CFG_DDR_CLK_CONTROL;
61 asm ("sync;isync;msync");
64 ddr->sdram_cfg = CFG_DDR_CONFIG;
65 asm ("sync; isync; msync");
68 if (get_ram_size(0, CFG_SDRAM_SIZE<<20) == CFG_SDRAM_SIZE<<20) {
70 * OK, size detected -> all done
72 return CFG_SDRAM_SIZE<<20;
75 return 0; /* nothing found ! */
79 phys_size_t initdram (int board_type)
82 #if defined(CONFIG_SPD_EEPROM)
83 dram_size = spd_sdram ();
85 dram_size = sdram_setup(CONFIG_DDR_DEFAULT_CL);
90 #if defined(CFG_DRAM_TEST)
93 uint *pstart = (uint *) CFG_MEMTEST_START;
94 uint *pend = (uint *) CFG_MEMTEST_END;
97 printf ("SDRAM test phase 1:\n");
98 for (p = pstart; p < pend; p++)
101 for (p = pstart; p < pend; p++) {
102 if (*p != 0xaaaaaaaa) {
103 printf ("SDRAM test fails at: %08x\n", (uint) p);
108 printf ("SDRAM test phase 2:\n");
109 for (p = pstart; p < pend; p++)
112 for (p = pstart; p < pend; p++) {
113 if (*p != 0x55555555) {
114 printf ("SDRAM test fails at: %08x\n", (uint) p);
119 printf ("SDRAM test passed.\n");