diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/cpu/quark/mrc.c | 204 | ||||
| -rw-r--r-- | arch/x86/include/asm/arch-quark/mrc.h | 187 |
2 files changed, 391 insertions, 0 deletions
diff --git a/arch/x86/cpu/quark/mrc.c b/arch/x86/cpu/quark/mrc.c new file mode 100644 index 0000000..7eb34c5 --- /dev/null +++ b/arch/x86/cpu/quark/mrc.c @@ -0,0 +1,204 @@ +/* + * Copyright (C) 2013, Intel Corporation + * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> + * + * Ported from Intel released Quark UEFI BIOS + * QuarkSocPkg/QuarkNorthCluster/MemoryInit/Pei + * + * SPDX-License-Identifier: Intel + */ + +/* + * This is the main Quark Memory Reference Code (MRC) + * + * These functions are generic and should work for any Quark-based board. + * + * MRC requires two data structures to be passed in which are initialized by + * mrc_adjust_params(). + * + * The basic flow is as follows: + * 01) Check for supported DDR speed configuration + * 02) Set up Memory Manager buffer as pass-through (POR) + * 03) Set Channel Interleaving Mode and Channel Stride to the most aggressive + * setting possible + * 04) Set up the Memory Controller logic + * 05) Set up the DDR_PHY logic + * 06) Initialise the DRAMs (JEDEC) + * 07) Perform the Receive Enable Calibration algorithm + * 08) Perform the Write Leveling algorithm + * 09) Perform the Read Training algorithm (includes internal Vref) + * 10) Perform the Write Training algorithm + * 11) Set Channel Interleaving Mode and Channel Stride to the desired settings + * + * DRAM unit configuration based on Valleyview MRC. + */ + +#include <common.h> +#include <asm/arch/mrc.h> +#include <asm/arch/msg_port.h> +#include "mrc_util.h" +#include "smc.h" + +static const struct mem_init init[] = { + { 0x0101, BM_COLD | BM_FAST | BM_WARM | BM_S3, clear_self_refresh }, + { 0x0200, BM_COLD | BM_FAST | BM_WARM | BM_S3, prog_ddr_timing_control }, + { 0x0103, BM_COLD | BM_FAST , prog_decode_before_jedec }, + { 0x0104, BM_COLD | BM_FAST , perform_ddr_reset }, + { 0x0300, BM_COLD | BM_FAST | BM_S3, ddrphy_init }, + { 0x0400, BM_COLD | BM_FAST , perform_jedec_init }, + { 0x0105, BM_COLD | BM_FAST , set_ddr_init_complete }, + { 0x0106, BM_FAST | BM_WARM | BM_S3, restore_timings }, + { 0x0106, BM_COLD , default_timings }, + { 0x0500, BM_COLD , rcvn_cal }, + { 0x0600, BM_COLD , wr_level }, + { 0x0120, BM_COLD , prog_page_ctrl }, + { 0x0700, BM_COLD , rd_train }, + { 0x0800, BM_COLD , wr_train }, + { 0x010b, BM_COLD , store_timings }, + { 0x010c, BM_COLD | BM_FAST | BM_WARM | BM_S3, enable_scrambling }, + { 0x010d, BM_COLD | BM_FAST | BM_WARM | BM_S3, prog_ddr_control }, + { 0x010e, BM_COLD | BM_FAST | BM_WARM | BM_S3, prog_dra_drb }, + { 0x010f, BM_WARM | BM_S3, perform_wake }, + { 0x0110, BM_COLD | BM_FAST | BM_WARM | BM_S3, change_refresh_period }, + { 0x0111, BM_COLD | BM_FAST | BM_WARM | BM_S3, set_auto_refresh }, + { 0x0112, BM_COLD | BM_FAST | BM_WARM | BM_S3, ecc_enable }, + { 0x0113, BM_COLD | BM_FAST , memory_test }, + { 0x0114, BM_COLD | BM_FAST | BM_WARM | BM_S3, lock_registers } +}; + +/* Adjust configuration parameters before initialization sequence */ +static void mrc_adjust_params(struct mrc_params *mrc_params) +{ + const struct dram_params *dram_params; + uint8_t dram_width; + uint32_t rank_enables; + uint32_t channel_width; + + ENTERFN(); + + /* initially expect success */ + mrc_params->status = MRC_SUCCESS; + + dram_width = mrc_params->dram_width; + rank_enables = mrc_params->rank_enables; + channel_width = mrc_params->channel_width; + + /* + * Setup board layout (must be reviewed as is selecting static timings) + * 0 == R0 (DDR3 x16), 1 == R1 (DDR3 x16), + * 2 == DV (DDR3 x8), 3 == SV (DDR3 x8). + */ + if (dram_width == X8) + mrc_params->board_id = 2; /* select x8 layout */ + else + mrc_params->board_id = 0; /* select x16 layout */ + + /* initially no memory */ + mrc_params->mem_size = 0; + + /* begin of channel settings */ + dram_params = &mrc_params->params; + + /* + * Determine column bits: + * + * Column: 11 for 8Gbx8, else 10 + */ + mrc_params->column_bits[0] = + ((dram_params[0].density == 4) && + (dram_width == X8)) ? (11) : (10); + + /* + * Determine row bits: + * + * 512Mbx16=12 512Mbx8=13 + * 1Gbx16=13 1Gbx8=14 + * 2Gbx16=14 2Gbx8=15 + * 4Gbx16=15 4Gbx8=16 + * 8Gbx16=16 8Gbx8=16 + */ + mrc_params->row_bits[0] = 12 + (dram_params[0].density) + + (((dram_params[0].density < 4) && + (dram_width == X8)) ? (1) : (0)); + + /* + * Determine per-channel memory size: + * + * (For 2 RANKs, multiply by 2) + * (For 16 bit data bus, divide by 2) + * + * DENSITY WIDTH MEM_AVAILABLE + * 512Mb x16 0x008000000 ( 128MB) + * 512Mb x8 0x010000000 ( 256MB) + * 1Gb x16 0x010000000 ( 256MB) + * 1Gb x8 0x020000000 ( 512MB) + * 2Gb x16 0x020000000 ( 512MB) + * 2Gb x8 0x040000000 (1024MB) + * 4Gb x16 0x040000000 (1024MB) + * 4Gb x8 0x080000000 (2048MB) + */ + mrc_params->channel_size[0] = (1 << dram_params[0].density); + mrc_params->channel_size[0] *= (dram_width == X8) ? 2 : 1; + mrc_params->channel_size[0] *= (rank_enables == 0x3) ? 2 : 1; + mrc_params->channel_size[0] *= (channel_width == X16) ? 1 : 2; + + /* Determine memory size (convert number of 64MB/512Mb units) */ + mrc_params->mem_size += mrc_params->channel_size[0] << 26; + + LEAVEFN(); +} + +static void mrc_mem_init(struct mrc_params *mrc_params) +{ + int i; + + ENTERFN(); + + /* MRC started */ + mrc_post_code(0x01, 0x00); + + if (mrc_params->boot_mode != BM_COLD) { + if (mrc_params->ddr_speed != mrc_params->timings.ddr_speed) { + /* full training required as frequency changed */ + mrc_params->boot_mode = BM_COLD; + } + } + + for (i = 0; i < ARRAY_SIZE(init); i++) { + uint64_t my_tsc; + + if (mrc_params->boot_mode & init[i].boot_path) { + uint8_t major = init[i].post_code >> 8 & 0xff; + uint8_t minor = init[i].post_code >> 0 & 0xff; + mrc_post_code(major, minor); + + my_tsc = rdtsc(); + init[i].init_fn(mrc_params); + DPF(D_TIME, "Execution time %llx", rdtsc() - my_tsc); + } + } + + /* display the timings */ + print_timings(mrc_params); + + /* MRC complete */ + mrc_post_code(0x01, 0xff); + + LEAVEFN(); +} + +void mrc_init(struct mrc_params *mrc_params) +{ + ENTERFN(); + + DPF(D_INFO, "MRC Version %04x %s %s\n", MRC_VERSION, + __DATE__, __TIME__); + + /* Set up the data structures used by mrc_mem_init() */ + mrc_adjust_params(mrc_params); + + /* Initialize system memory */ + mrc_mem_init(mrc_params); + + LEAVEFN(); +} diff --git a/arch/x86/include/asm/arch-quark/mrc.h b/arch/x86/include/asm/arch-quark/mrc.h new file mode 100644 index 0000000..150fbea --- /dev/null +++ b/arch/x86/include/asm/arch-quark/mrc.h @@ -0,0 +1,187 @@ +/* + * Copyright (C) 2013, Intel Corporation + * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> + * + * Ported from Intel released Quark UEFI BIOS + * QuarkSocPkg/QuarkNorthCluster/MemoryInit/Pei + * + * SPDX-License-Identifier: Intel + */ + +#ifndef _MRC_H_ +#define _MRC_H_ + +#define MRC_VERSION 0x0111 + +/* architectural definitions */ +#define NUM_CHANNELS 1 /* number of channels */ +#define NUM_RANKS 2 /* number of ranks per channel */ +#define NUM_BYTE_LANES 4 /* number of byte lanes per channel */ + +/* software limitations */ +#define MAX_CHANNELS 1 +#define MAX_RANKS 2 +#define MAX_BYTE_LANES 4 + +#define MAX_SOCKETS 1 +#define MAX_SIDES 1 +#define MAX_ROWS (MAX_SIDES * MAX_SOCKETS) + +/* Specify DRAM and channel width */ +enum { + X8, /* DRAM width */ + X16, /* DRAM width & Channel Width */ + X32 /* Channel Width */ +}; + +/* Specify DRAM speed */ +enum { + DDRFREQ_800, + DDRFREQ_1066 +}; + +/* Specify DRAM type */ +enum { + DDR3, + DDR3L +}; + +/* + * density: 0=512Mb, 1=Gb, 2=2Gb, 3=4Gb + * cl: DRAM CAS Latency in clocks + * ras: ACT to PRE command period + * wtr: Delay from start of internal write transaction to internal read command + * rrd: ACT to ACT command period (JESD79 specific to page size 1K/2K) + * faw: Four activate window (JESD79 specific to page size 1K/2K) + * + * ras/wtr/rrd/faw timings are in picoseconds + * + * Refer to JEDEC spec (or DRAM datasheet) when changing these values. + */ +struct dram_params { + uint8_t density; + uint8_t cl; + uint32_t ras; + uint32_t wtr; + uint32_t rrd; + uint32_t faw; +}; + +/* + * Delay configuration for individual signals + * Vref setting + * Scrambler seed + */ +struct mrc_timings { + uint32_t rcvn[NUM_CHANNELS][NUM_RANKS][NUM_BYTE_LANES]; + uint32_t rdqs[NUM_CHANNELS][NUM_RANKS][NUM_BYTE_LANES]; + uint32_t wdqs[NUM_CHANNELS][NUM_RANKS][NUM_BYTE_LANES]; + uint32_t wdq[NUM_CHANNELS][NUM_RANKS][NUM_BYTE_LANES]; + uint32_t vref[NUM_CHANNELS][NUM_BYTE_LANES]; + uint32_t wctl[NUM_CHANNELS][NUM_RANKS]; + uint32_t wcmd[NUM_CHANNELS]; + uint32_t scrambler_seed; + /* need to save for the case of frequency change */ + uint8_t ddr_speed; +}; + +/* Boot mode defined as bit mask (1<<n) */ +enum { + BM_UNKNOWN, + BM_COLD = 1, /* full training */ + BM_FAST = 2, /* restore timing parameters */ + BM_S3 = 4, /* resume from S3 */ + BM_WARM = 8 +}; + +/* MRC execution status */ +#define MRC_SUCCESS 0 /* initialization ok */ +#define MRC_E_MEMTEST 1 /* memtest failed */ + +/* + * Memory Reference Code parameters + * + * It includes 3 parts: + * - input parameters like boot mode and DRAM parameters + * - context parameters for MRC internal state + * - output parameters like initialization result and memory size + */ +struct mrc_params { + /* Input parameters */ + uint32_t boot_mode; /* BM_COLD, BM_FAST, BM_WARM, BM_S3 */ + /* DRAM parameters */ + uint8_t dram_width; /* x8, x16 */ + uint8_t ddr_speed; /* DDRFREQ_800, DDRFREQ_1066 */ + uint8_t ddr_type; /* DDR3, DDR3L */ + uint8_t ecc_enables; /* 0, 1 (memory size reduced to 7/8) */ + uint8_t scrambling_enables; /* 0, 1 */ + /* 1, 3 (1'st rank has to be populated if 2'nd rank present) */ + uint32_t rank_enables; + uint32_t channel_enables; /* 1 only */ + uint32_t channel_width; /* x16 only */ + /* 0, 1, 2 (mode 2 forced if ecc enabled) */ + uint32_t address_mode; + /* REFRESH_RATE: 1=1.95us, 2=3.9us, 3=7.8us, others=RESERVED */ + uint8_t refresh_rate; + /* SR_TEMP_RANGE: 0=normal, 1=extended, others=RESERVED */ + uint8_t sr_temp_range; + /* + * RON_VALUE: 0=34ohm, 1=40ohm, others=RESERVED + * (select MRS1.DIC driver impedance control) + */ + uint8_t ron_value; + /* RTT_NOM_VALUE: 0=40ohm, 1=60ohm, 2=120ohm, others=RESERVED */ + uint8_t rtt_nom_value; + /* RD_ODT_VALUE: 0=off, 1=60ohm, 2=120ohm, 3=180ohm, others=RESERVED */ + uint8_t rd_odt_value; + struct dram_params params; + /* Internally used context parameters */ + uint32_t board_id; /* board layout (use x8 or x16 memory) */ + uint32_t hte_setup; /* when set hte reconfiguration requested */ + uint32_t menu_after_mrc; + uint32_t power_down_disable; + uint32_t tune_rcvn; + uint32_t channel_size[NUM_CHANNELS]; + uint32_t column_bits[NUM_CHANNELS]; + uint32_t row_bits[NUM_CHANNELS]; + uint32_t mrs1; /* register content saved during training */ + uint8_t first_run; + /* Output parameters */ + /* initialization result (non zero specifies error code) */ + uint32_t status; + /* total memory size in bytes (excludes ECC banks) */ + uint32_t mem_size; + /* training results (also used on input) */ + struct mrc_timings timings; +}; + +/* + * MRC memory initialization structure + * + * post_code: a 16-bit post code of a specific initialization routine + * boot_path: bitwise or of BM_COLD, BM_FAST, BM_WARM and BM_S3 + * init_fn: real memory initialization routine + */ +struct mem_init { + uint16_t post_code; + uint16_t boot_path; + void (*init_fn)(struct mrc_params *mrc_params); +}; + +/* MRC platform data flags */ +#define MRC_FLAG_ECC_EN 0x00000001 +#define MRC_FLAG_SCRAMBLE_EN 0x00000002 +#define MRC_FLAG_MEMTEST_EN 0x00000004 +/* 0b DDR "fly-by" topology else 1b DDR "tree" topology */ +#define MRC_FLAG_TOP_TREE_EN 0x00000008 +/* If set ODR signal is asserted to DRAM devices on writes */ +#define MRC_FLAG_WR_ODT_EN 0x00000010 + +/** + * mrc_init - Memory Reference Code initialization entry routine + * + * @mrc_params: parameters for MRC + */ +void mrc_init(struct mrc_params *mrc_params); + +#endif /* _MRC_H_ */ |