diff options
Diffstat (limited to 'arch/x86/cpu/quark/dram.c')
| -rw-r--r-- | arch/x86/cpu/quark/dram.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/arch/x86/cpu/quark/dram.c b/arch/x86/cpu/quark/dram.c new file mode 100644 index 0000000000..9cac846c69 --- /dev/null +++ b/arch/x86/cpu/quark/dram.c @@ -0,0 +1,134 @@ +/* + * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <errno.h> +#include <fdtdec.h> +#include <asm/post.h> +#include <asm/arch/mrc.h> +#include <asm/arch/quark.h> + +DECLARE_GLOBAL_DATA_PTR; + +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; + } + + /* + * TODO: + * + * We need support fast boot (MRC cache) in the future. + * + * Set boot mode to cold boot for now + */ + mrc_params->boot_mode = BM_COLD; + + /* + * 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; + 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); + + return 0; +} + +void dram_init_banksize(void) +{ + gd->bd->bi_dram[0].start = 0; + gd->bd->bi_dram[0].size = gd->ram_size; +} + +/* + * 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; +} |