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u-boot/arch/arm/cpu/armv7/mx6/ddr.c

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mx6: add mmdc configuration for MX6Q/MX6DL - add function for configuring iomux based on board-specific regs - add function for configuring mmdc based on board-specific and chip-specific data Cc: Stefan Roese <sr@denx.de> Cc: Otavio Salvador <otavio@ossystems.com.br> Cc: Andy Ng <andreas2025@gmail.com> Cc: Eric Nelson <eric.nelson@boundarydevices.com> Cc: Tapani Utriainen <tapani@technexion.com> Cc: Tom Rini <trini@ti.com> Signed-off-by: Tim Harvey <tharvey@gateworks.com>
2014-06-02 23:13:23 +00:00
/*
* Copyright (C) 2014 Gateworks Corporation
* Author: Tim Harvey <tharvey@gateworks.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <linux/types.h>
#include <asm/arch/mx6-ddr.h>
#include <asm/arch/sys_proto.h>
#include <asm/io.h>
#include <asm/types.h>
#if defined(CONFIG_MX6QDL) || defined(CONFIG_MX6Q) || defined(CONFIG_MX6D)
/* Configure MX6DQ mmdc iomux */
void mx6dq_dram_iocfg(unsigned width,
const struct mx6dq_iomux_ddr_regs *ddr,
const struct mx6dq_iomux_grp_regs *grp)
{
volatile struct mx6dq_iomux_ddr_regs *mx6_ddr_iomux;
volatile struct mx6dq_iomux_grp_regs *mx6_grp_iomux;
mx6_ddr_iomux = (struct mx6dq_iomux_ddr_regs *)MX6DQ_IOM_DDR_BASE;
mx6_grp_iomux = (struct mx6dq_iomux_grp_regs *)MX6DQ_IOM_GRP_BASE;
/* DDR IO Type */
mx6_grp_iomux->grp_ddr_type = grp->grp_ddr_type;
mx6_grp_iomux->grp_ddrpke = grp->grp_ddrpke;
/* Clock */
mx6_ddr_iomux->dram_sdclk_0 = ddr->dram_sdclk_0;
mx6_ddr_iomux->dram_sdclk_1 = ddr->dram_sdclk_1;
/* Address */
mx6_ddr_iomux->dram_cas = ddr->dram_cas;
mx6_ddr_iomux->dram_ras = ddr->dram_ras;
mx6_grp_iomux->grp_addds = grp->grp_addds;
/* Control */
mx6_ddr_iomux->dram_reset = ddr->dram_reset;
mx6_ddr_iomux->dram_sdcke0 = ddr->dram_sdcke0;
mx6_ddr_iomux->dram_sdcke1 = ddr->dram_sdcke1;
mx6_ddr_iomux->dram_sdba2 = ddr->dram_sdba2;
mx6_ddr_iomux->dram_sdodt0 = ddr->dram_sdodt0;
mx6_ddr_iomux->dram_sdodt1 = ddr->dram_sdodt1;
mx6_grp_iomux->grp_ctlds = grp->grp_ctlds;
/* Data Strobes */
mx6_grp_iomux->grp_ddrmode_ctl = grp->grp_ddrmode_ctl;
mx6_ddr_iomux->dram_sdqs0 = ddr->dram_sdqs0;
mx6_ddr_iomux->dram_sdqs1 = ddr->dram_sdqs1;
if (width >= 32) {
mx6_ddr_iomux->dram_sdqs2 = ddr->dram_sdqs2;
mx6_ddr_iomux->dram_sdqs3 = ddr->dram_sdqs3;
}
if (width >= 64) {
mx6_ddr_iomux->dram_sdqs4 = ddr->dram_sdqs4;
mx6_ddr_iomux->dram_sdqs5 = ddr->dram_sdqs5;
mx6_ddr_iomux->dram_sdqs6 = ddr->dram_sdqs6;
mx6_ddr_iomux->dram_sdqs7 = ddr->dram_sdqs7;
}
/* Data */
mx6_grp_iomux->grp_ddrmode = grp->grp_ddrmode;
mx6_grp_iomux->grp_b0ds = grp->grp_b0ds;
mx6_grp_iomux->grp_b1ds = grp->grp_b1ds;
if (width >= 32) {
mx6_grp_iomux->grp_b2ds = grp->grp_b2ds;
mx6_grp_iomux->grp_b3ds = grp->grp_b3ds;
}
if (width >= 64) {
mx6_grp_iomux->grp_b4ds = grp->grp_b4ds;
mx6_grp_iomux->grp_b5ds = grp->grp_b5ds;
mx6_grp_iomux->grp_b6ds = grp->grp_b6ds;
mx6_grp_iomux->grp_b7ds = grp->grp_b7ds;
}
mx6_ddr_iomux->dram_dqm0 = ddr->dram_dqm0;
mx6_ddr_iomux->dram_dqm1 = ddr->dram_dqm1;
if (width >= 32) {
mx6_ddr_iomux->dram_dqm2 = ddr->dram_dqm2;
mx6_ddr_iomux->dram_dqm3 = ddr->dram_dqm3;
}
if (width >= 64) {
mx6_ddr_iomux->dram_dqm4 = ddr->dram_dqm4;
mx6_ddr_iomux->dram_dqm5 = ddr->dram_dqm5;
mx6_ddr_iomux->dram_dqm6 = ddr->dram_dqm6;
mx6_ddr_iomux->dram_dqm7 = ddr->dram_dqm7;
}
}
#endif
#if defined(CONFIG_MX6QDL) || defined(CONFIG_MX6DL) || defined(CONFIG_MX6S)
/* Configure MX6SDL mmdc iomux */
void mx6sdl_dram_iocfg(unsigned width,
const struct mx6sdl_iomux_ddr_regs *ddr,
const struct mx6sdl_iomux_grp_regs *grp)
{
volatile struct mx6sdl_iomux_ddr_regs *mx6_ddr_iomux;
volatile struct mx6sdl_iomux_grp_regs *mx6_grp_iomux;
mx6_ddr_iomux = (struct mx6sdl_iomux_ddr_regs *)MX6SDL_IOM_DDR_BASE;
mx6_grp_iomux = (struct mx6sdl_iomux_grp_regs *)MX6SDL_IOM_GRP_BASE;
/* DDR IO Type */
mx6_grp_iomux->grp_ddr_type = grp->grp_ddr_type;
mx6_grp_iomux->grp_ddrpke = grp->grp_ddrpke;
/* Clock */
mx6_ddr_iomux->dram_sdclk_0 = ddr->dram_sdclk_0;
mx6_ddr_iomux->dram_sdclk_1 = ddr->dram_sdclk_1;
/* Address */
mx6_ddr_iomux->dram_cas = ddr->dram_cas;
mx6_ddr_iomux->dram_ras = ddr->dram_ras;
mx6_grp_iomux->grp_addds = grp->grp_addds;
/* Control */
mx6_ddr_iomux->dram_reset = ddr->dram_reset;
mx6_ddr_iomux->dram_sdcke0 = ddr->dram_sdcke0;
mx6_ddr_iomux->dram_sdcke1 = ddr->dram_sdcke1;
mx6_ddr_iomux->dram_sdba2 = ddr->dram_sdba2;
mx6_ddr_iomux->dram_sdodt0 = ddr->dram_sdodt0;
mx6_ddr_iomux->dram_sdodt1 = ddr->dram_sdodt1;
mx6_grp_iomux->grp_ctlds = grp->grp_ctlds;
/* Data Strobes */
mx6_grp_iomux->grp_ddrmode_ctl = grp->grp_ddrmode_ctl;
mx6_ddr_iomux->dram_sdqs0 = ddr->dram_sdqs0;
mx6_ddr_iomux->dram_sdqs1 = ddr->dram_sdqs1;
if (width >= 32) {
mx6_ddr_iomux->dram_sdqs2 = ddr->dram_sdqs2;
mx6_ddr_iomux->dram_sdqs3 = ddr->dram_sdqs3;
}
if (width >= 64) {
mx6_ddr_iomux->dram_sdqs4 = ddr->dram_sdqs4;
mx6_ddr_iomux->dram_sdqs5 = ddr->dram_sdqs5;
mx6_ddr_iomux->dram_sdqs6 = ddr->dram_sdqs6;
mx6_ddr_iomux->dram_sdqs7 = ddr->dram_sdqs7;
}
/* Data */
mx6_grp_iomux->grp_ddrmode = grp->grp_ddrmode;
mx6_grp_iomux->grp_b0ds = grp->grp_b0ds;
mx6_grp_iomux->grp_b1ds = grp->grp_b1ds;
if (width >= 32) {
mx6_grp_iomux->grp_b2ds = grp->grp_b2ds;
mx6_grp_iomux->grp_b3ds = grp->grp_b3ds;
}
if (width >= 64) {
mx6_grp_iomux->grp_b4ds = grp->grp_b4ds;
mx6_grp_iomux->grp_b5ds = grp->grp_b5ds;
mx6_grp_iomux->grp_b6ds = grp->grp_b6ds;
mx6_grp_iomux->grp_b7ds = grp->grp_b7ds;
}
mx6_ddr_iomux->dram_dqm0 = ddr->dram_dqm0;
mx6_ddr_iomux->dram_dqm1 = ddr->dram_dqm1;
if (width >= 32) {
mx6_ddr_iomux->dram_dqm2 = ddr->dram_dqm2;
mx6_ddr_iomux->dram_dqm3 = ddr->dram_dqm3;
}
if (width >= 64) {
mx6_ddr_iomux->dram_dqm4 = ddr->dram_dqm4;
mx6_ddr_iomux->dram_dqm5 = ddr->dram_dqm5;
mx6_ddr_iomux->dram_dqm6 = ddr->dram_dqm6;
mx6_ddr_iomux->dram_dqm7 = ddr->dram_dqm7;
}
}
#endif
/*
* Configure mx6 mmdc registers based on:
* - board-specific memory configuration
* - board-specific calibration data
* - ddr3 chip details
*
* The various calculations here are derived from the Freescale
* i.Mx6DQSDL DDR3 Script Aid spreadsheet (DOC-94917) designed to generate MMDC
* configuration registers based on memory system and memory chip parameters.
*
* The defaults here are those which were specified in the spreadsheet.
* For details on each register, refer to the IMX6DQRM and/or IMX6SDLRM
* section titled MMDC initialization
*/
#define MR(val, ba, cmd, cs1) \
((val << 16) | (1 << 15) | (cmd << 4) | (cs1 << 3) | ba)
void mx6_dram_cfg(const struct mx6_ddr_sysinfo *i,
const struct mx6_mmdc_calibration *c,
const struct mx6_ddr3_cfg *m)
{
volatile struct mmdc_p_regs *mmdc0;
volatile struct mmdc_p_regs *mmdc1;
u32 reg;
u8 tcke, tcksrx, tcksre, txpdll, taofpd, taonpd, trrd;
u8 todtlon, taxpd, tanpd, tcwl, txp, tfaw, tcl;
u8 todt_idle_off = 0x4; /* from DDR3 Script Aid spreadsheet */
u16 trcd, trc, tras, twr, tmrd, trtp, trp, twtr, trfc, txs, txpr;
u16 CS0_END;
u16 tdllk = 0x1ff; /* DLL locking time: 512 cycles (JEDEC DDR3) */
int clkper; /* clock period in picoseconds */
int clock; /* clock freq in mHz */
int cs;
mmdc0 = (struct mmdc_p_regs *)MMDC_P0_BASE_ADDR;
mmdc1 = (struct mmdc_p_regs *)MMDC_P1_BASE_ADDR;
/* MX6D/MX6Q: 1066 MHz memory clock, clkper = 1.894ns = 1894ps */
if (is_cpu_type(MXC_CPU_MX6Q) || is_cpu_type(MXC_CPU_MX6D)) {
clock = 528;
tcwl = 4;
}
/* MX6S/MX6DL: 800 MHz memory clock, clkper = 2.5ns = 2500ps */
else {
clock = 400;
tcwl = 3;
}
clkper = (1000*1000)/clock; /* ps */
todtlon = tcwl;
taxpd = tcwl;
tanpd = tcwl;
tcwl = tcwl;
switch (m->density) {
case 1: /* 1Gb per chip */
trfc = DIV_ROUND_UP(110000, clkper) - 1;
txs = DIV_ROUND_UP(120000, clkper) - 1;
break;
case 2: /* 2Gb per chip */
trfc = DIV_ROUND_UP(160000, clkper) - 1;
txs = DIV_ROUND_UP(170000, clkper) - 1;
break;
case 4: /* 4Gb per chip */
trfc = DIV_ROUND_UP(260000, clkper) - 1;
txs = DIV_ROUND_UP(270000, clkper) - 1;
break;
case 8: /* 8Gb per chip */
trfc = DIV_ROUND_UP(350000, clkper) - 1;
txs = DIV_ROUND_UP(360000, clkper) - 1;
break;
default:
/* invalid density */
printf("invalid chip density\n");
hang();
break;
}
txpr = txs;
switch (m->mem_speed) {
case 800:
txp = DIV_ROUND_UP(MAX(3*clkper, 7500), clkper) - 1;
tcke = DIV_ROUND_UP(MAX(3*clkper, 7500), clkper) - 1;
if (m->pagesz == 1) {
tfaw = DIV_ROUND_UP(40000, clkper) - 1;
trrd = DIV_ROUND_UP(MAX(4*clkper, 10000), clkper) - 1;
} else {
tfaw = DIV_ROUND_UP(50000, clkper) - 1;
trrd = DIV_ROUND_UP(MAX(4*clkper, 10000), clkper) - 1;
}
break;
case 1066:
txp = DIV_ROUND_UP(MAX(3*clkper, 7500), clkper) - 1;
tcke = DIV_ROUND_UP(MAX(3*clkper, 5625), clkper) - 1;
if (m->pagesz == 1) {
tfaw = DIV_ROUND_UP(37500, clkper) - 1;
trrd = DIV_ROUND_UP(MAX(4*clkper, 7500), clkper) - 1;
} else {
tfaw = DIV_ROUND_UP(50000, clkper) - 1;
trrd = DIV_ROUND_UP(MAX(4*clkper, 10000), clkper) - 1;
}
break;
case 1333:
txp = DIV_ROUND_UP(MAX(3*clkper, 6000), clkper) - 1;
tcke = DIV_ROUND_UP(MAX(3*clkper, 5625), clkper) - 1;
if (m->pagesz == 1) {
tfaw = DIV_ROUND_UP(30000, clkper) - 1;
trrd = DIV_ROUND_UP(MAX(4*clkper, 6000), clkper) - 1;
} else {
tfaw = DIV_ROUND_UP(45000, clkper) - 1;
trrd = DIV_ROUND_UP(MAX(4*clkper, 7500), clkper) - 1;
}
break;
case 1600:
txp = DIV_ROUND_UP(MAX(3*clkper, 6000), clkper) - 1;
tcke = DIV_ROUND_UP(MAX(3*clkper, 5000), clkper) - 1;
if (m->pagesz == 1) {
tfaw = DIV_ROUND_UP(30000, clkper) - 1;
trrd = DIV_ROUND_UP(MAX(4*clkper, 6000), clkper) - 1;
} else {
tfaw = DIV_ROUND_UP(40000, clkper) - 1;
trrd = DIV_ROUND_UP(MAX(4*clkper, 7500), clkper) - 1;
}
break;
default:
printf("invalid memory speed\n");
hang();
break;
}
txpdll = DIV_ROUND_UP(MAX(10*clkper, 24000), clkper) - 1;
tcl = DIV_ROUND_UP(m->trcd, clkper/10) - 3;
tcksre = DIV_ROUND_UP(MAX(5*clkper, 10000), clkper);
tcksrx = tcksre;
taonpd = DIV_ROUND_UP(2000, clkper) - 1;
taofpd = taonpd;
trp = DIV_ROUND_UP(m->trcd, clkper/10) - 1;
trcd = trp;
trc = DIV_ROUND_UP(m->trcmin, clkper/10) - 1;
tras = DIV_ROUND_UP(m->trasmin, clkper/10) - 1;
twr = DIV_ROUND_UP(15000, clkper) - 1;
tmrd = DIV_ROUND_UP(MAX(12*clkper, 15000), clkper) - 1;
twtr = ROUND(MAX(4*clkper, 7500)/clkper, 1) - 1;
trtp = twtr;
CS0_END = ((4*i->cs_density) <= 120) ? (4*i->cs_density)+7 : 127;
debug("density:%d Gb (%d Gb per chip)\n", i->cs_density, m->density);
debug("clock: %dMHz (%d ps)\n", clock, clkper);
debug("memspd:%d\n", m->mem_speed);
debug("tcke=%d\n", tcke);
debug("tcksrx=%d\n", tcksrx);
debug("tcksre=%d\n", tcksre);
debug("taofpd=%d\n", taofpd);
debug("taonpd=%d\n", taonpd);
debug("todtlon=%d\n", todtlon);
debug("tanpd=%d\n", tanpd);
debug("taxpd=%d\n", taxpd);
debug("trfc=%d\n", trfc);
debug("txs=%d\n", txs);
debug("txp=%d\n", txp);
debug("txpdll=%d\n", txpdll);
debug("tfaw=%d\n", tfaw);
debug("tcl=%d\n", tcl);
debug("trcd=%d\n", trcd);
debug("trp=%d\n", trp);
debug("trc=%d\n", trc);
debug("tras=%d\n", tras);
debug("twr=%d\n", twr);
debug("tmrd=%d\n", tmrd);
debug("tcwl=%d\n", tcwl);
debug("tdllk=%d\n", tdllk);
debug("trtp=%d\n", trtp);
debug("twtr=%d\n", twtr);
debug("trrd=%d\n", trrd);
debug("txpr=%d\n", txpr);
debug("CS0_END=%d\n", CS0_END);
debug("ncs=%d\n", i->ncs);
debug("Rtt_wr=%d\n", i->rtt_wr);
debug("Rtt_nom=%d\n", i->rtt_nom);
debug("SRT=%d\n", m->SRT);
debug("tcl=%d\n", tcl);
debug("twr=%d\n", twr);
/*
* board-specific configuration:
* These values are determined empirically and vary per board layout
* see:
* appnote, ddr3 spreadsheet
*/
mmdc0->mpwldectrl0 = c->p0_mpwldectrl0;
mmdc0->mpwldectrl1 = c->p0_mpwldectrl1;
mmdc0->mpdgctrl0 = c->p0_mpdgctrl0;
mmdc0->mpdgctrl1 = c->p0_mpdgctrl1;
mmdc0->mprddlctl = c->p0_mprddlctl;
mmdc0->mpwrdlctl = c->p0_mpwrdlctl;
if (i->dsize > 1) {
mmdc1->mpwldectrl0 = c->p1_mpwldectrl0;
mmdc1->mpwldectrl1 = c->p1_mpwldectrl1;
mmdc1->mpdgctrl0 = c->p1_mpdgctrl0;
mmdc1->mpdgctrl1 = c->p1_mpdgctrl1;
mmdc1->mprddlctl = c->p1_mprddlctl;
mmdc1->mpwrdlctl = c->p1_mpwrdlctl;
}
/* Read data DQ Byte0-3 delay */
mmdc0->mprddqby0dl = (u32)0x33333333;
mmdc0->mprddqby1dl = (u32)0x33333333;
if (i->dsize > 0) {
mmdc0->mprddqby2dl = (u32)0x33333333;
mmdc0->mprddqby3dl = (u32)0x33333333;
}
if (i->dsize > 1) {
mmdc1->mprddqby0dl = (u32)0x33333333;
mmdc1->mprddqby1dl = (u32)0x33333333;
mmdc1->mprddqby2dl = (u32)0x33333333;
mmdc1->mprddqby3dl = (u32)0x33333333;
}
/* MMDC Termination: rtt_nom:2 RZQ/2(120ohm), rtt_nom:1 RZQ/4(60ohm) */
reg = (i->rtt_nom == 2) ? 0x00011117 : 0x00022227;
mmdc0->mpodtctrl = reg;
if (i->dsize > 1)
mmdc1->mpodtctrl = reg;
/* complete calibration */
reg = (1 << 11); /* Force measurement on delay-lines */
mmdc0->mpmur0 = reg;
if (i->dsize > 1)
mmdc1->mpmur0 = reg;
/* Step 1: configuration request */
mmdc0->mdscr = (u32)(1 << 15); /* config request */
/* Step 2: Timing configuration */
reg = (trfc << 24) | (txs << 16) | (txp << 13) | (txpdll << 9) |
(tfaw << 4) | tcl;
mmdc0->mdcfg0 = reg;
reg = (trcd << 29) | (trp << 26) | (trc << 21) | (tras << 16) |
(1 << 15) | /* trpa */
(twr << 9) | (tmrd << 5) | tcwl;
mmdc0->mdcfg1 = reg;
reg = (tdllk << 16) | (trtp << 6) | (twtr << 3) | trrd;
mmdc0->mdcfg2 = reg;
reg = (taofpd << 27) | (taonpd << 24) | (tanpd << 20) | (taxpd << 16) |
(todtlon << 12) | (todt_idle_off << 4);
mmdc0->mdotc = reg;
mmdc0->mdasp = CS0_END; /* CS addressing */
/* Step 3: Configure DDR type */
reg = (i->cs1_mirror << 19) | (i->walat << 16) | (i->bi_on << 12) |
(i->mif3_mode << 9) | (i->ralat << 6);
mmdc0->mdmisc = reg;
/* Step 4: Configure delay while leaving reset */
reg = (txpr << 16) | (i->sde_to_rst << 8) | (i->rst_to_cke << 0);
mmdc0->mdor = reg;
/* Step 5: Configure DDR physical parameters (density and burst len) */
reg = (m->rowaddr - 11) << 24 | /* ROW */
(m->coladdr - 9) << 20 | /* COL */
(1 << 19) | /* Burst Length = 8 for DDR3 */
(i->dsize << 16); /* DDR data bus size */
mmdc0->mdctl = reg;
/* Step 6: Perform ZQ calibration */
reg = (u32)0xa1390001; /* one-time HW ZQ calib */
mmdc0->mpzqhwctrl = reg;
if (i->dsize > 1)
mmdc1->mpzqhwctrl = reg;
/* Step 7: Enable MMDC with desired chip select */
reg = mmdc0->mdctl |
(1 << 31) | /* SDE_0 for CS0 */
((i->ncs == 2) ? 1 : 0) << 30; /* SDE_1 for CS1 */
mmdc0->mdctl = reg;
/* Step 8: Write Mode Registers to Init DDR3 devices */
for (cs = 0; cs < i->ncs; cs++) {
/* MR2 */
reg = (i->rtt_wr & 3) << 9 | (m->SRT & 1) << 7 |
((tcwl - 3) & 3) << 3;
mmdc0->mdscr = (u32)MR(reg, 2, 3, cs);
/* MR3 */
mmdc0->mdscr = (u32)MR(0, 3, 3, cs);
/* MR1 */
reg = ((i->rtt_nom & 1) ? 1 : 0) << 2 |
((i->rtt_nom & 2) ? 1 : 0) << 6;
mmdc0->mdscr = (u32)MR(reg, 1, 3, cs);
reg = ((tcl - 1) << 4) | /* CAS */
(1 << 8) | /* DLL Reset */
((twr - 3) << 9); /* Write Recovery */
/* MR0 */
mmdc0->mdscr = (u32)MR(reg, 0, 3, cs);
/* ZQ calibration */
reg = (1 << 10);
mmdc0->mdscr = (u32)MR(reg, 0, 4, cs);
}
/* Step 10: Power down control and self-refresh */
reg = (tcke & 0x7) << 16 |
5 << 12 | /* PWDT_1: 256 cycles */
5 << 8 | /* PWDT_0: 256 cycles */
1 << 6 | /* BOTH_CS_PD */
(tcksrx & 0x7) << 3 |
(tcksre & 0x7);
mmdc0->mdpdc = reg;
mmdc0->mapsr = (u32)0x00011006; /* ADOPT power down enabled */
/* Step 11: Configure ZQ calibration: one-time and periodic 1ms */
mmdc0->mpzqhwctrl = (u32)0xa1390003;
if (i->dsize > 1)
mmdc1->mpzqhwctrl = (u32)0xa1390003;
/* Step 12: Configure and activate periodic refresh */
reg = (1 << 14) | /* REF_SEL: Periodic refresh cycles of 32kHz */
(7 << 11); /* REFR: Refresh Rate - 8 refreshes */
mmdc0->mdref = reg;
/* Step 13: Deassert config request - init complete */
mmdc0->mdscr = (u32)0x00000000;
/* wait for auto-ZQ calibration to complete */
mdelay(1);
}
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