diff options
| -rw-r--r-- | arch/powerpc/cpu/mpc8xxx/ddr/main.c | 6 | ||||
| -rw-r--r-- | doc/README.fsl-ddr | 7 |
2 files changed, 11 insertions, 2 deletions
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/main.c b/arch/powerpc/cpu/mpc8xxx/ddr/main.c index d6b73c7..a33c9e2 100644 --- a/arch/powerpc/cpu/mpc8xxx/ddr/main.c +++ b/arch/powerpc/cpu/mpc8xxx/ddr/main.c @@ -532,9 +532,11 @@ phys_size_t fsl_ddr_sdram(void) /* Compute it once normally. */ #ifdef CONFIG_FSL_DDR_INTERACTIVE - if (getenv("ddr_interactive")) + if (getenv("ddr_interactive")) { total_memory = fsl_ddr_interactive(&info); - else + } else if (tstc() && (getc() == 'd')) { /* we got a key press of 'd' */ + total_memory = fsl_ddr_interactive(&info); + } else #endif total_memory = fsl_ddr_compute(&info, STEP_GET_SPD, 0); diff --git a/doc/README.fsl-ddr b/doc/README.fsl-ddr index 3992640..59583b3 100644 --- a/doc/README.fsl-ddr +++ b/doc/README.fsl-ddr @@ -268,6 +268,13 @@ be activated by saving an environment variable "ddr_interactive". The value doesn't matter. Once activated, U-boot prompts "FSL DDR>" before enabling DDR controller. The available commands can be seen by typing "help". +Another way to enter debug mode without using environment variable is to send +a key press during boot, like one would do to abort auto boot. To save booting +time, no additioal delay is added so the window to send the key press is very +short. For example, user can send the key press using reset command followed by +hitting enter key twice. In case of power on reset, user can keep hitting any +key while applying the power. + The example flow of using interactive debugging is type command "compute" to calculate the parameters from the default type command "print" with arguments to show SPD, options, registers |