diff options
| author | York Sun <yorksun@freescale.com> | 2011-09-16 13:21:35 -0700 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2011-10-09 17:57:53 -0500 |
| commit | 6f5e1dc531d6b4a975e39054fdf7c737cbb4d8e9 (patch) | |
| tree | 4fbde6801479185b2a2c64c5a8ce65d6a9a1a9d8 /include | |
| parent | 0841ca90f22d73b0ea4642ef1ce33d879bb2f3ff (diff) | |
powerpc/8xxx: Add support for interactive DDR programming interface
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/configs/p1_p2_rdb_pc.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/configs/p1_p2_rdb_pc.h b/include/configs/p1_p2_rdb_pc.h index b9b89cfa5d..f1ef1df183 100644 --- a/include/configs/p1_p2_rdb_pc.h +++ b/include/configs/p1_p2_rdb_pc.h @@ -232,7 +232,7 @@ #define CONFIG_DDR_SPD #define CONFIG_SYS_SPD_BUS_NUM 1 #define SPD_EEPROM_ADDRESS 0x52 -#define CONFIG_FSL_DDR_INTERACTIVE +#undef CONFIG_FSL_DDR_INTERACTIVE #ifdef CONFIG_P1020MBG #define CONFIG_SYS_SDRAM_SIZE_LAW LAW_SIZE_2G |