2 * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
4 * SPDX-License-Identifier: GPL-2.0+
11 #include <asm/mrccache.h>
14 #include <asm/arch/mrc.h>
15 #include <asm/arch/msg_port.h>
16 #include <asm/arch/quark.h>
18 DECLARE_GLOBAL_DATA_PTR;
20 static __maybe_unused int prepare_mrc_cache(struct mrc_params *mrc_params)
22 struct mrc_data_container *cache;
23 struct mrc_region entry;
26 ret = mrccache_get_region(NULL, &entry);
30 cache = mrccache_find_current(&entry);
34 debug("%s: mrc cache at %p, size %x checksum %04x\n", __func__,
35 cache->data, cache->data_size, cache->checksum);
37 /* copy mrc cache to the mrc_params */
38 memcpy(&mrc_params->timings, cache->data, cache->data_size);
43 static int mrc_configure_params(struct mrc_params *mrc_params)
45 const void *blob = gd->fdt_blob;
49 node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_QRK_MRC);
51 debug("%s: Cannot find MRC node\n", __func__);
55 #ifdef CONFIG_ENABLE_MRC_CACHE
56 mrc_params->boot_mode = prepare_mrc_cache(mrc_params);
57 if (mrc_params->boot_mode)
58 mrc_params->boot_mode = BM_COLD;
60 mrc_params->boot_mode = BM_FAST;
62 mrc_params->boot_mode = BM_COLD;
68 * We need determine ECC by pin strap state
70 * Disable ECC by default for now
72 mrc_params->ecc_enables = 0;
74 mrc_flags = fdtdec_get_int(blob, node, "flags", 0);
75 if (mrc_flags & MRC_FLAG_SCRAMBLE_EN)
76 mrc_params->scrambling_enables = 1;
78 mrc_params->scrambling_enables = 0;
80 mrc_params->dram_width = fdtdec_get_int(blob, node, "dram-width", 0);
81 mrc_params->ddr_speed = fdtdec_get_int(blob, node, "dram-speed", 0);
82 mrc_params->ddr_type = fdtdec_get_int(blob, node, "dram-type", 0);
84 mrc_params->rank_enables = fdtdec_get_int(blob, node, "rank-mask", 0);
85 mrc_params->channel_enables = fdtdec_get_int(blob, node,
87 mrc_params->channel_width = fdtdec_get_int(blob, node,
89 mrc_params->address_mode = fdtdec_get_int(blob, node, "addr-mode", 0);
91 mrc_params->refresh_rate = fdtdec_get_int(blob, node,
93 mrc_params->sr_temp_range = fdtdec_get_int(blob, node,
95 mrc_params->ron_value = fdtdec_get_int(blob, node,
97 mrc_params->rtt_nom_value = fdtdec_get_int(blob, node,
99 mrc_params->rd_odt_value = fdtdec_get_int(blob, node,
102 mrc_params->params.density = fdtdec_get_int(blob, node,
104 mrc_params->params.cl = fdtdec_get_int(blob, node, "dram-cl", 0);
105 mrc_params->params.ras = fdtdec_get_int(blob, node, "dram-ras", 0);
106 mrc_params->params.wtr = fdtdec_get_int(blob, node, "dram-wtr", 0);
107 mrc_params->params.rrd = fdtdec_get_int(blob, node, "dram-rrd", 0);
108 mrc_params->params.faw = fdtdec_get_int(blob, node, "dram-faw", 0);
110 debug("MRC dram_width %d\n", mrc_params->dram_width);
111 debug("MRC rank_enables %d\n", mrc_params->rank_enables);
112 debug("MRC ddr_speed %d\n", mrc_params->ddr_speed);
113 debug("MRC flags: %s\n",
114 (mrc_params->scrambling_enables) ? "SCRAMBLE_EN" : "");
116 debug("MRC density=%d tCL=%d tRAS=%d tWTR=%d tRRD=%d tFAW=%d\n",
117 mrc_params->params.density, mrc_params->params.cl,
118 mrc_params->params.ras, mrc_params->params.wtr,
119 mrc_params->params.rrd, mrc_params->params.faw);
126 struct mrc_params mrc_params;
127 #ifdef CONFIG_ENABLE_MRC_CACHE
132 memset(&mrc_params, 0, sizeof(struct mrc_params));
133 ret = mrc_configure_params(&mrc_params);
137 /* Set up the DRAM by calling the memory reference code */
138 mrc_init(&mrc_params);
139 if (mrc_params.status)
142 gd->ram_size = mrc_params.mem_size;
143 post_code(POST_DRAM);
145 /* variable range MTRR#2: RAM area */
147 msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_VAR_PHYBASE(MTRR_VAR_RAM),
148 0 | MTRR_TYPE_WRBACK);
149 msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_VAR_PHYMASK(MTRR_VAR_RAM),
150 (~(gd->ram_size - 1)) | MTRR_PHYS_MASK_VALID);
153 #ifdef CONFIG_ENABLE_MRC_CACHE
154 cache = malloc(sizeof(struct mrc_timings));
156 memcpy(cache, &mrc_params.timings, sizeof(struct mrc_timings));
157 gd->arch.mrc_output = cache;
158 gd->arch.mrc_output_len = sizeof(struct mrc_timings);
165 int dram_init_banksize(void)
167 gd->bd->bi_dram[0].start = 0;
168 gd->bd->bi_dram[0].size = gd->ram_size;
174 * This function looks for the highest region of memory lower than 4GB which
175 * has enough space for U-Boot where U-Boot is aligned on a page boundary.
176 * It overrides the default implementation found elsewhere which simply
177 * picks the end of ram, wherever that may be. The location of the stack,
178 * the relocation address, and how far U-Boot is moved by relocation are
179 * set in the global data structure.
181 ulong board_get_usable_ram_top(ulong total_size)