diff options
| -rw-r--r-- | arch/arm/cpu/armv7/lowlevel_init.S | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/arch/arm/cpu/armv7/lowlevel_init.S b/arch/arm/cpu/armv7/lowlevel_init.S index f1aea05..427b0b1 100644 --- a/arch/arm/cpu/armv7/lowlevel_init.S +++ b/arch/arm/cpu/armv7/lowlevel_init.S @@ -17,10 +17,17 @@ ENTRY(lowlevel_init) /* - * Setup a temporary stack + * Setup a temporary stack. Global data is not available yet. */ ldr sp, =CONFIG_SYS_INIT_SP_ADDR bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ +#ifdef CONFIG_DM + mov r9, #0 +#else + /* + * Set up global data for boards that still need it. This will be + * removed soon. + */ #ifdef CONFIG_SPL_BUILD ldr r9, =gdata #else @@ -28,13 +35,24 @@ ENTRY(lowlevel_init) bic sp, sp, #7 mov r9, sp #endif +#endif /* * Save the old lr(passed in ip) and the current lr to stack */ push {ip, lr} /* - * go setup pll, mux, memory + * Call the very early init function. This should do only the + * absolute bare minimum to get started. It should not: + * + * - set up DRAM + * - use global_data + * - clear BSS + * - try to start a console + * + * For boards with SPL this should be empty since SPL can do all of + * this init in the SPL board_init_f() function which is called + * immediately after this. */ bl s_init pop {ip, pc} |