2 * Copyright 2008 Freescale Semiconductor, Inc.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * Version 2 as published by the Free Software Foundation.
10 #include <asm/fsl_law.h>
14 unsigned int fsl_ddr_get_mem_data_rate(void);
17 * Round mclk_ps to nearest 10 ps in memory controller code.
19 * If an imprecise data rate is too high due to rounding error
20 * propagation, compute a suitably rounded mclk_ps to compute
21 * a working memory controller configuration.
23 unsigned int get_memory_clk_period_ps(void)
27 mclk_ps = 2000000000000ULL / fsl_ddr_get_mem_data_rate();
28 /* round to nearest 10 ps */
29 return 10 * ((mclk_ps + 5) / 10);
32 /* Convert picoseconds into DRAM clock cycles (rounding up if needed). */
33 unsigned int picos_to_mclk(unsigned int picos)
35 const unsigned long long ULL_2e12 = 2000000000000ULL;
36 const unsigned long long ULL_8Fs = 0xFFFFFFFFULL;
37 unsigned long long clks;
38 unsigned long long clks_temp;
43 clks = fsl_ddr_get_mem_data_rate() * (unsigned long long) picos;
45 clks = clks / ULL_2e12;
46 if (clks_temp % ULL_2e12) {
54 return (unsigned int) clks;
57 unsigned int mclk_to_picos(unsigned int mclk)
59 return get_memory_clk_period_ps() * mclk;
63 __fsl_ddr_set_lawbar(const common_timing_params_t *memctl_common_params,
64 unsigned int memctl_interleaved,
65 unsigned int ctrl_num)
67 unsigned long long base = memctl_common_params->base_address;
68 unsigned long long size = memctl_common_params->total_mem;
71 * If no DIMMs on this controller, do not proceed any further.
73 if (!memctl_common_params->ndimms_present) {
77 #if !defined(CONFIG_PHYS_64BIT)
78 if (base >= CONFIG_MAX_MEM_MAPPED)
80 if ((base + size) >= CONFIG_MAX_MEM_MAPPED)
81 size = CONFIG_MAX_MEM_MAPPED - base;
86 * Set up LAW for DDR controller 1 space.
88 unsigned int lawbar1_target_id = memctl_interleaved
89 ? LAW_TRGT_IF_DDR_INTRLV : LAW_TRGT_IF_DDR_1;
91 if (set_ddr_laws(base, size, lawbar1_target_id) < 0) {
95 } else if (ctrl_num == 1) {
96 if (set_ddr_laws(base, size, LAW_TRGT_IF_DDR_2) < 0) {
101 printf("unexpected controller number %u in %s\n",
102 ctrl_num, __FUNCTION__);
106 __attribute__((weak, alias("__fsl_ddr_set_lawbar"))) void
107 fsl_ddr_set_lawbar(const common_timing_params_t *memctl_common_params,
108 unsigned int memctl_interleaved,
109 unsigned int ctrl_num);
111 void board_add_ram_info(int use_default)
113 #if defined(CONFIG_MPC85xx)
114 volatile ccsr_ddr_t *ddr = (void *)(CONFIG_SYS_MPC85xx_DDR_ADDR);
115 #elif defined(CONFIG_MPC86xx)
116 volatile ccsr_ddr_t *ddr = (void *)(CONFIG_SYS_MPC86xx_DDR_ADDR);
118 #if (CONFIG_NUM_DDR_CONTROLLERS > 1)
119 uint32_t cs0_config = in_be32(&ddr->cs0_config);
121 uint32_t sdram_cfg = in_be32(&ddr->sdram_cfg);
125 switch ((sdram_cfg & SDRAM_CFG_SDRAM_TYPE_MASK) >>
126 SDRAM_CFG_SDRAM_TYPE_SHIFT) {
127 case SDRAM_TYPE_DDR1:
130 case SDRAM_TYPE_DDR2:
133 case SDRAM_TYPE_DDR3:
141 if (sdram_cfg & SDRAM_CFG_32_BE)
146 /* Calculate CAS latency based on timing cfg values */
147 cas_lat = ((in_be32(&ddr->timing_cfg_1) >> 16) & 0xf) + 1;
148 if ((in_be32(&ddr->timing_cfg_3) >> 12) & 1)
150 printf(", CL=%d", cas_lat >> 1);
154 if (sdram_cfg & SDRAM_CFG_ECC_EN)
159 #if (CONFIG_NUM_DDR_CONTROLLERS > 1)
160 if (cs0_config & 0x20000000) {
162 puts(" DDR Controller Interleaving Mode: ");
164 switch ((cs0_config >> 24) & 0xf) {
165 case FSL_DDR_CACHE_LINE_INTERLEAVING:
168 case FSL_DDR_PAGE_INTERLEAVING:
171 case FSL_DDR_BANK_INTERLEAVING:
174 case FSL_DDR_SUPERBANK_INTERLEAVING:
184 if ((sdram_cfg >> 8) & 0x7f) {
186 puts(" DDR Chip-Select Interleaving Mode: ");
187 switch(sdram_cfg >> 8 & 0x7f) {
188 case FSL_DDR_CS0_CS1_CS2_CS3:
189 puts("CS0+CS1+CS2+CS3");
191 case FSL_DDR_CS0_CS1:
194 case FSL_DDR_CS2_CS3:
197 case FSL_DDR_CS0_CS1_AND_CS2_CS3:
198 puts("CS0+CS1 and CS2+CS3");