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-rw-r--r--roms/u-boot/arch/x86/cpu/quark/dram.c190
1 files changed, 190 insertions, 0 deletions
diff --git a/roms/u-boot/arch/x86/cpu/quark/dram.c b/roms/u-boot/arch/x86/cpu/quark/dram.c
new file mode 100644
index 000000000..2287dce12
--- /dev/null
+++ b/roms/u-boot/arch/x86/cpu/quark/dram.c
@@ -0,0 +1,190 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
+ */
+
+#include <common.h>
+#include <cpu_func.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <init.h>
+#include <log.h>
+#include <malloc.h>
+#include <asm/cache.h>
+#include <asm/global_data.h>
+#include <asm/mrccache.h>
+#include <asm/mtrr.h>
+#include <asm/post.h>
+#include <asm/arch/mrc.h>
+#include <asm/arch/msg_port.h>
+#include <asm/arch/quark.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static __maybe_unused int prepare_mrc_cache(struct mrc_params *mrc_params)
+{
+ struct mrc_data_container *cache;
+ struct mrc_region entry;
+ int ret;
+
+ ret = mrccache_get_region(MRC_TYPE_NORMAL, NULL, &entry);
+ if (ret)
+ return ret;
+
+ cache = mrccache_find_current(&entry);
+ if (!cache)
+ return -ENOENT;
+
+ debug("%s: mrc cache at %p, size %x checksum %04x\n", __func__,
+ cache->data, cache->data_size, cache->checksum);
+
+ /* copy mrc cache to the mrc_params */
+ memcpy(&mrc_params->timings, cache->data, cache->data_size);
+
+ return 0;
+}
+
+static int mrc_configure_params(struct mrc_params *mrc_params)
+{
+ const void *blob = gd->fdt_blob;
+ int node;
+ int mrc_flags;
+
+ node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_QRK_MRC);
+ if (node < 0) {
+ debug("%s: Cannot find MRC node\n", __func__);
+ return -EINVAL;
+ }
+
+#ifdef CONFIG_ENABLE_MRC_CACHE
+ mrc_params->boot_mode = prepare_mrc_cache(mrc_params);
+ if (mrc_params->boot_mode)
+ mrc_params->boot_mode = BM_COLD;
+ else
+ mrc_params->boot_mode = BM_FAST;
+#else
+ mrc_params->boot_mode = BM_COLD;
+#endif
+
+ /*
+ * TODO:
+ *
+ * We need determine ECC by pin strap state
+ *
+ * Disable ECC by default for now
+ */
+ mrc_params->ecc_enables = 0;
+
+ mrc_flags = fdtdec_get_int(blob, node, "flags", 0);
+ if (mrc_flags & MRC_FLAG_SCRAMBLE_EN)
+ mrc_params->scrambling_enables = 1;
+ else
+ mrc_params->scrambling_enables = 0;
+
+ mrc_params->dram_width = fdtdec_get_int(blob, node, "dram-width", 0);
+ mrc_params->ddr_speed = fdtdec_get_int(blob, node, "dram-speed", 0);
+ mrc_params->ddr_type = fdtdec_get_int(blob, node, "dram-type", 0);
+
+ mrc_params->rank_enables = fdtdec_get_int(blob, node, "rank-mask", 0);
+ mrc_params->channel_enables = fdtdec_get_int(blob, node,
+ "chan-mask", 0);
+ mrc_params->channel_width = fdtdec_get_int(blob, node,
+ "chan-width", 0);
+ mrc_params->address_mode = fdtdec_get_int(blob, node, "addr-mode", 0);
+
+ mrc_params->refresh_rate = fdtdec_get_int(blob, node,
+ "refresh-rate", 0);
+ mrc_params->sr_temp_range = fdtdec_get_int(blob, node,
+ "sr-temp-range", 0);
+ mrc_params->ron_value = fdtdec_get_int(blob, node,
+ "ron-value", 0);
+ mrc_params->rtt_nom_value = fdtdec_get_int(blob, node,
+ "rtt-nom-value", 0);
+ mrc_params->rd_odt_value = fdtdec_get_int(blob, node,
+ "rd-odt-value", 0);
+
+ mrc_params->params.density = fdtdec_get_int(blob, node,
+ "dram-density", 0);
+ mrc_params->params.cl = fdtdec_get_int(blob, node, "dram-cl", 0);
+ mrc_params->params.ras = fdtdec_get_int(blob, node, "dram-ras", 0);
+ mrc_params->params.wtr = fdtdec_get_int(blob, node, "dram-wtr", 0);
+ mrc_params->params.rrd = fdtdec_get_int(blob, node, "dram-rrd", 0);
+ mrc_params->params.faw = fdtdec_get_int(blob, node, "dram-faw", 0);
+
+ debug("MRC dram_width %d\n", mrc_params->dram_width);
+ debug("MRC rank_enables %d\n", mrc_params->rank_enables);
+ debug("MRC ddr_speed %d\n", mrc_params->ddr_speed);
+ debug("MRC flags: %s\n",
+ (mrc_params->scrambling_enables) ? "SCRAMBLE_EN" : "");
+
+ debug("MRC density=%d tCL=%d tRAS=%d tWTR=%d tRRD=%d tFAW=%d\n",
+ mrc_params->params.density, mrc_params->params.cl,
+ mrc_params->params.ras, mrc_params->params.wtr,
+ mrc_params->params.rrd, mrc_params->params.faw);
+
+ return 0;
+}
+
+int dram_init(void)
+{
+ struct mrc_params mrc_params;
+#ifdef CONFIG_ENABLE_MRC_CACHE
+ char *cache;
+#endif
+ int ret;
+
+ memset(&mrc_params, 0, sizeof(struct mrc_params));
+ ret = mrc_configure_params(&mrc_params);
+ if (ret)
+ return ret;
+
+ /* Set up the DRAM by calling the memory reference code */
+ mrc_init(&mrc_params);
+ if (mrc_params.status)
+ return -EIO;
+
+ gd->ram_size = mrc_params.mem_size;
+ post_code(POST_DRAM);
+
+ /* variable range MTRR#2: RAM area */
+ disable_caches();
+ msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_VAR_PHYBASE(MTRR_VAR_RAM),
+ 0 | MTRR_TYPE_WRBACK);
+ msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_VAR_PHYMASK(MTRR_VAR_RAM),
+ (~(gd->ram_size - 1)) | MTRR_PHYS_MASK_VALID);
+ enable_caches();
+
+#ifdef CONFIG_ENABLE_MRC_CACHE
+ cache = malloc(sizeof(struct mrc_timings));
+ if (cache) {
+ struct mrc_output *mrc = &gd->arch.mrc[MRC_TYPE_NORMAL];
+
+ memcpy(cache, &mrc_params.timings, sizeof(struct mrc_timings));
+ mrc->buf = cache;
+ mrc->len = sizeof(struct mrc_timings);
+ }
+#endif
+
+ return 0;
+}
+
+int dram_init_banksize(void)
+{
+ gd->bd->bi_dram[0].start = 0;
+ gd->bd->bi_dram[0].size = gd->ram_size;
+
+ return 0;
+}
+
+/*
+ * This function looks for the highest region of memory lower than 4GB which
+ * has enough space for U-Boot where U-Boot is aligned on a page boundary.
+ * It overrides the default implementation found elsewhere which simply
+ * picks the end of ram, wherever that may be. The location of the stack,
+ * the relocation address, and how far U-Boot is moved by relocation are
+ * set in the global data structure.
+ */
+ulong board_get_usable_ram_top(ulong total_size)
+{
+ return gd->ram_size;
+}