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https://github.com/AsahiLinux/u-boot
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Interactive DDR debugging provides a user interface to view and modify SPD, DIMM parameters, board options and DDR controller registers before DDR is initialized. With this feature, developers can fine-tune DDR for board bringup and other debugging without frequently having to reprogram the flash. To enable this feature, define CONFIG_FSL_DDR_INTERACTIVE in board header file and set an environment variable to activate it. Syntax: setenv ddr_interactive on After reset, U-boot prompts before initializing DDR controllers FSL DDR> The available commands are print print SPD and intermediate computed data reset reboot machine recompute reload SPD and options to default and recompute regs edit modify spd, parameter, or option compute recompute registers from current next_step to end next_step shows current next_step help this message go program the memory controller and continue with u-boot The first command should be "compute", which reads data from DIMM SPDs and board options, performs the calculation then stops before setting DDR controller. A user can use "print" and "edit" commands to view and modify anything. "Go" picks up from current step with any modification and compltes the calculation then enables the DDR controller to continue u-boot. "Recompute" does it over from fresh reading. Signed-off-by: York Sun <yorksun@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
374 lines
18 KiB
Text
374 lines
18 KiB
Text
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Table of interleaving modes supported in cpu/8xxx/ddr/
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======================================================
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+-------------+---------------------------------------------------------+
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| | Rank Interleaving |
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| +--------+-----------+-----------+------------+-----------+
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|Memory | | | | 2x2 | 4x1 |
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|Controller | None | 2x1 lower | 2x1 upper | {CS0+CS1}, | {CS0+CS1+ |
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|Interleaving | | {CS0+CS1} | {CS2+CS3} | {CS2+CS3} | CS2+CS3} |
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+-------------+--------+-----------+-----------+------------+-----------+
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|None | Yes | Yes | Yes | Yes | Yes |
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+-------------+--------+-----------+-----------+------------+-----------+
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|Cacheline | Yes | Yes | No | No, Only(*)| Yes |
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| |CS0 Only| | | {CS0+CS1} | |
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+-------------+--------+-----------+-----------+------------+-----------+
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|Page | Yes | Yes | No | No, Only(*)| Yes |
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| |CS0 Only| | | {CS0+CS1} | |
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+-------------+--------+-----------+-----------+------------+-----------+
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|Bank | Yes | Yes | No | No, Only(*)| Yes |
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| |CS0 Only| | | {CS0+CS1} | |
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+-------------+--------+-----------+-----------+------------+-----------+
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|Superbank | No | Yes | No | No, Only(*)| Yes |
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| | | | | {CS0+CS1} | |
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+-------------+--------+-----------+-----------+------------+-----------+
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(*) Although the hardware can be configured with memory controller
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interleaving using "2x2" rank interleaving, it only interleaves {CS0+CS1}
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from each controller. {CS2+CS3} on each controller are only rank
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interleaved on that controller.
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For memory controller interleaving, identical DIMMs are suggested. Software
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doesn't check the size or organization of interleaved DIMMs.
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The ways to configure the ddr interleaving mode
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==============================================
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1. In board header file(e.g.MPC8572DS.h), add default interleaving setting
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under "CONFIG_EXTRA_ENV_SETTINGS", like:
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#define CONFIG_EXTRA_ENV_SETTINGS \
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"hwconfig=fsl_ddr:ctlr_intlv=bank" \
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......
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2. Run u-boot "setenv" command to configure the memory interleaving mode.
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Either numerical or string value is accepted.
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# disable memory controller interleaving
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setenv hwconfig "fsl_ddr:ctlr_intlv=null"
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# cacheline interleaving
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setenv hwconfig "fsl_ddr:ctlr_intlv=cacheline"
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# page interleaving
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setenv hwconfig "fsl_ddr:ctlr_intlv=page"
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# bank interleaving
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setenv hwconfig "fsl_ddr:ctlr_intlv=bank"
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# superbank
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setenv hwconfig "fsl_ddr:ctlr_intlv=superbank"
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# disable bank (chip-select) interleaving
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setenv hwconfig "fsl_ddr:bank_intlv=null"
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# bank(chip-select) interleaving cs0+cs1
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setenv hwconfig "fsl_ddr:bank_intlv=cs0_cs1"
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# bank(chip-select) interleaving cs2+cs3
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setenv hwconfig "fsl_ddr:bank_intlv=cs2_cs3"
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# bank(chip-select) interleaving (cs0+cs1) and (cs2+cs3) (2x2)
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setenv hwconfig "fsl_ddr:bank_intlv=cs0_cs1_and_cs2_cs3"
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# bank(chip-select) interleaving (cs0+cs1+cs2+cs3) (4x1)
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setenv hwconfig "fsl_ddr:bank_intlv=cs0_cs1_cs2_cs3"
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Memory controller address hashing
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==================================
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If the DDR controller supports address hashing, it can be enabled by hwconfig.
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Syntax is:
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hwconfig=fsl_ddr:addr_hash=true
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Memory controller ECC on/off
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============================
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If ECC is enabled in board configuratoin file, i.e. #define CONFIG_DDR_ECC,
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ECC can be turned on/off by hwconfig.
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Syntax is
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hwconfig=fsl_ddr:ecc=off
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Memory testing options for mpc85xx
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==================================
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1. Memory test can be done once U-boot prompt comes up using mtest, or
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2. Memory test can be done with Power-On-Self-Test function, activated at
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compile time.
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In order to enable the POST memory test, CONFIG_POST needs to be
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defined in board configuraiton header file. By default, POST memory test
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performs a fast test. A slow test can be enabled by changing the flag at
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compiling time. To test memory bigger than 2GB, 36BIT support is needed.
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Memory is tested within a 2GB window. TLBs are used to map the virtual 2GB
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window to physical address so that all physical memory can be tested.
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Combination of hwconfig
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=======================
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Hwconfig can be combined with multiple parameters, for example, on a supported
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platform
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hwconfig=fsl_ddr:addr_hash=true,ctlr_intlv=cacheline,bank_intlv=cs0_cs1_cs2_cs3,ecc=on
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Table for dynamic ODT for DDR3
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==============================
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For single-slot system with quad-rank DIMM and dual-slot system, dynamic ODT may
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be needed, depending on the configuration. The numbers in the following tables are
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in Ohms.
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* denotes dynamic ODT
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Two slots system
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+-----------------------+----------+---------------+-----------------------------+-----------------------------+
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| Configuration | |DRAM controller| Slot 1 | Slot 2 |
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+-----------+-----------+----------+-------+-------+--------------+--------------+--------------+--------------+
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| | | | | | Rank 1 | Rank 2 | Rank 1 | Rank 2 |
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+ Slot 1 | Slot 2 |Write/Read| Write | Read |-------+------+-------+------+-------+------+-------+------+
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| | | | | | Write | Read | Write | Read | Write | Read | Write | Read |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 1 | off | 75 | 120 | off | off | off | off | off | 30 | 30 |
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| Dual Rank | Dual Rank |----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 2 | off | 75 | off | off | 30 | 30 | 120 | off | off | off |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 1 | off | 75 | 120 | off | off | off | 20 | 20 | | |
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| Dual Rank |Single Rank|----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 2 | off | 75 | off | off | 20 | 20 | 120 *| off | | |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 1 | off | 75 | 120 *| off | | | off | off | 20 | 20 |
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|Single Rank| Dual Rank |----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 2 | off | 75 | 20 | 20 | | | 120 | off | off | off |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 1 | off | 75 | 120 *| off | | | 30 | 30 | | |
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|Single Rank|Single Rank|----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 2 | off | 75 | 30 | 30 | | | 120 *| off | | |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| Dual Rank | Empty | Slot 1 | off | 75 | 40 | off | off | off | | | | |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| Empty | Dual Rank | Slot 2 | off | 75 | | | | | 40 | off | off | off |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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|Single Rank| Empty | Slot 1 | off | 75 | 40 | off | | | | | | |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| Empty |Single Rank| Slot 2 | off | 75 | | | | | 40 | off | | |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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Single slot system
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+-------------+------------+---------------+-----------------------------+-----------------------------+
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| | |DRAM controller| Rank 1 | Rank 2 | Rank 3 | Rank 4 |
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|Configuration| Write/Read |-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Write | Read | Write | Read | Write | Read | Write | Read | Write | Read |
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+-------------+------------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | R1 | off | 75 | 120 *| off | off | off | 20 | 20 | off | off |
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| |------------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | R2 | off | 75 | off | 20 | 120 | off | 20 | 20 | off | off |
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| Quad Rank |------------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | R3 | off | 75 | 20 | 20 | off | off | 120 *| off | off | off |
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| |------------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | R4 | off | 75 | 20 | 20 | off | off | off | 20 | 120 | off |
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+-------------+------------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | R1 | off | 75 | 40 | off | off | off |
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| Dual Rank |------------+-------+-------+-------+------+-------+------+
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| | R2 | off | 75 | 40 | off | off | off |
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+-------------+------------+-------+-------+-------+------+-------+------+
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| Single Rank | R1 | off | 75 | 40 | off |
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+-------------+------------+-------+-------+-------+------+
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Reference http://www.xrosstalkmag.com/mag_issues/xrosstalk_oct08_final.pdf
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http://download.micron.com/pdf/technotes/ddr3/tn4108_ddr3_design_guide.pdf
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Table for ODT for DDR2
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======================
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Two slots system
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+-----------------------+----------+---------------+-----------------------------+-----------------------------+
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| Configuration | |DRAM controller| Slot 1 | Slot 2 |
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+-----------+-----------+----------+-------+-------+--------------+--------------+--------------+--------------+
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| | | | | | Rank 1 | Rank 2 | Rank 1 | Rank 2 |
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+ Slot 1 | Slot 2 |Write/Read| Write | Read |-------+------+-------+------+-------+------+-------+------+
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| | | | | | Write | Read | Write | Read | Write | Read | Write | Read |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 1 | off | 150 | off | off | off | off | 75 | 75 | off | off |
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| Dual Rank | Dual Rank |----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 2 | off | 150 | 75 | 75 | off | off | off | off | off | off |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 1 | off | 150 | off | off | off | off | 75 | 75 | | |
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| Dual Rank |Single Rank|----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 2 | off | 150 | 75 | 75 | off | off | off | off | | |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 1 | off | 150 | off | off | | | 75 | 75 | off | off |
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|Single Rank| Dual Rank |----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 2 | off | 150 | 75 | 75 | | | off | off | off | off |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 1 | off | 150 | off | off | | | 75 | 75 | | |
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|Single Rank|Single Rank|----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| | | Slot 2 | off | 150 | 75 | 75 | | | off | off | | |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| Dual Rank | Empty | Slot 1 | off | 75 | 150 | off | off | off | | | | |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| Empty | Dual Rank | Slot 2 | off | 75 | | | | | 150 | off | off | off |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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|Single Rank| Empty | Slot 1 | off | 75 | 150 | off | | | | | | |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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| Empty |Single Rank| Slot 2 | off | 75 | | | | | 150 | off | | |
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+-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
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Single slot system
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+-------------+------------+---------------+-----------------------------+
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| | |DRAM controller| Rank 1 | Rank 2 |
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|Configuration| Write/Read |-------+-------+-------+------+-------+------+
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| | | Write | Read | Write | Read | Write | Read |
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+-------------+------------+-------+-------+-------+------+-------+------+
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| | R1 | off | 75 | 150 | off | off | off |
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| Dual Rank |------------+-------+-------+-------+------+-------+------+
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| | R2 | off | 75 | 150 | off | off | off |
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+-------------+------------+-------+-------+-------+------+-------+------+
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| Single Rank | R1 | off | 75 | 150 | off |
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+-------------+------------+-------+-------+-------+------+
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Reference http://www.samsung.com/global/business/semiconductor/products/dram/downloads/applicationnote/ddr2_odt_control_200603.pdf
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Interactive DDR debugging
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===========================
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For DDR parameter tuning up and debugging, the interactive DDR debugging can
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be activated by saving an environment variable "ddr_interactive". The value
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doesn't matter. Once activated, U-boot prompts "FSL DDR>" before enabling DDR
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controller. The available commands can be seen by typing "help".
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The example flow of using interactive debugging is
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type command "compute" to calculate the parameters from the default
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type command "print" with arguments to show SPD, options, registers
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type command "edit" with arguments to change any if desired
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type command "go" to continue calculation and enable DDR controller
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type command "reset" to reset the board
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type command "recompute" to reload SPD and start over
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Note, check "next_step" to show the flow. For example, after edit opts, the
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next_step is STEP_ASSIGN_ADDRESSES. After editing registers, the next_step is
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STEP_PROGRAM_REGS. Upon issuing command "go", DDR controller will be enabled
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with current setting without further calculation.
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The detail syntax for each commands are
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print [c<n>] [d<n>] [spd] [dimmparms] [commonparms] [opts] [addresses] [regs]
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c<n> - the controller number, eg. c0, c1
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d<n> - the DIMM number, eg. d0, d1
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spd - print SPD data
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dimmparms - DIMM paramaters, calcualted from SPD
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commonparms - lowest common parameters for all DIMMs
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opts - options
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addresses - address assignment (not implemented yet)
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regs - controller registers
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edit <c#> <d#> <spd|dimmparms|commonparms|opts|addresses|regs> <element> <value>
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c<n> - the controller number, eg. c0, c1
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d<n> - the DIMM number, eg. d0, d1
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spd - print SPD data
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dimmparms - DIMM paramaters, calcualted from SPD
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commonparms - lowest common parameters for all DIMMs
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opts - options
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addresses - address assignment (not implemented yet)
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regs - controller registers
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<element> - name of the modified element
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byte number if the object is SPD
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<value> - decimal or heximal (prefixed with 0x) numbers
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reset
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no arguement - reset the board
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recompute
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no argument - reload SPD and start over
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compute
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no argument - recompute from current next_step
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next_step
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no argument - show current next_step
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help
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no argument - print a list of all commands
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go
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no argument - program memory controller(s) and continue with U-boot
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Examples of debugging flow
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FSL DDR>compute
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Detected UDIMM UG51U6400N8SU-ACF
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SL DDR>print
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print [c<n>] [d<n>] [spd] [dimmparms] [commonparms] [opts] [addresses] [regs]
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FSL DDR>print dimmparms
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DIMM parameters: Controller=0 DIMM=0
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DIMM organization parameters:
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module part name = UG51U6400N8SU-ACF
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rank_density = 2147483648 bytes (2048 megabytes)
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capacity = 4294967296 bytes (4096 megabytes)
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burst_lengths_bitmask = 0C
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base_addresss = 0 (00000000 00000000)
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n_ranks = 2
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data_width = 64
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primary_sdram_width = 64
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ec_sdram_width = 0
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registered_dimm = 0
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n_row_addr = 15
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n_col_addr = 10
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edc_config = 0
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n_banks_per_sdram_device = 8
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tCKmin_X_ps = 1500
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tCKmin_X_minus_1_ps = 0
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tCKmin_X_minus_2_ps = 0
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tCKmax_ps = 0
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caslat_X = 960
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tAA_ps = 13125
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caslat_X_minus_1 = 0
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caslat_X_minus_2 = 0
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caslat_lowest_derated = 0
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tRCD_ps = 13125
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tRP_ps = 13125
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tRAS_ps = 36000
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tWR_ps = 15000
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tWTR_ps = 7500
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tRFC_ps = 160000
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tRRD_ps = 6000
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tRC_ps = 49125
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refresh_rate_ps = 7800000
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tIS_ps = 0
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tIH_ps = 0
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tDS_ps = 0
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tDH_ps = 0
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tRTP_ps = 7500
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tDQSQ_max_ps = 0
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tQHS_ps = 0
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FSL DDR>edit c0 opts ECC_mode 0
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FSL DDR>edit c0 regs cs0_bnds 0x000000FF
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FSL DDR>go
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2 GiB left unmapped
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4 GiB (DDR3, 64-bit, CL=9, ECC off)
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DDR Chip-Select Interleaving Mode: CS0+CS1
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Testing 0x00000000 - 0x7fffffff
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Testing 0x80000000 - 0xffffffff
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Remap DDR 2 GiB left unmapped
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POST memory PASSED
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Flash: 128 MiB
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L2: 128 KB enabled
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Corenet Platform Cache: 1024 KB enabled
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SERDES: timeout resetting bank 3
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SRIO1: disabled
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SRIO2: disabled
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MMC: FSL_ESDHC: 0
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EEPROM: Invalid ID (ff ff ff ff)
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PCIe1: disabled
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PCIe2: Root Complex, x1, regs @ 0xfe201000
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01:00.0 - 8086:10d3 - Network controller
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PCIe2: Bus 00 - 01
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PCIe3: disabled
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In: serial
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Out: serial
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Err: serial
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Net: Initializing Fman
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Fman1: Uploading microcode version 101.8.0
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e1000: 00:1b:21:81:d2:e0
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FM1@DTSEC1, FM1@DTSEC2, FM1@DTSEC3, FM1@DTSEC4, FM1@DTSEC5, e1000#0 [PRIME]
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Warning: e1000#0 MAC addresses don't match:
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Address in SROM is 00:1b:21:81:d2:e0
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Address in environment is 00:e0:0c:00:ea:05
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Hit any key to stop autoboot: 0
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=>
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