The initial stack on some platforms is too small to hold a large malloc space. This patch adds a option to allow these platforms not reserving the malloc space on initial stack. These platforms should set the malloc base after DRAM is usable.

Signed-off-by: Weijie Gao weijie.gao@mediatek.com --- Changes since v1: newly added --- arch/mips/Kconfig | 18 ++++++++++++++++++ arch/mips/cpu/start.S | 6 ++++-- 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index bf30a56101..5f82caf8be 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -317,6 +317,24 @@ config NEW_EXCEPTION_VECTOR_BASE help The exception vector base to be restored before booting linux kernel

+config INIT_STACK_WITHOUT_MALLOC_F + bool "Do not reserve malloc space on initial stack" + default n + help + Enable this option if you don't want to reserve malloc space on + initial stack. This is useful if the initial stack can't hold large + malloc space. Platform should set the malloc_base later when DRAM is + ready to use. + +config SPL_INIT_STACK_WITHOUT_MALLOC_F + bool "Do not reserve malloc space on initial stack in SPL" + default n + help + Enable this option if you don't want to reserve malloc space on + initial stack. This is useful if the initial stack can't hold large + malloc space. Platform should set the malloc_base later when DRAM is + ready to use. + endmenu

menu "OS boot interface" diff --git a/arch/mips/cpu/start.S b/arch/mips/cpu/start.S index dd93df9e4a..6de9a2f362 100644 --- a/arch/mips/cpu/start.S +++ b/arch/mips/cpu/start.S @@ -59,7 +59,8 @@ sp, sp, GD_SIZE # reserve space for gd and sp, sp, t0 # force 16 byte alignment move k0, sp # save gd pointer -#if CONFIG_VAL(SYS_MALLOC_F_LEN) +#if CONFIG_VAL(SYS_MALLOC_F_LEN) && \ + !CONFIG_IS_ENABLED(INIT_STACK_WITHOUT_MALLOC_F) li t2, CONFIG_VAL(SYS_MALLOC_F_LEN) PTR_SUBU \ sp, sp, t2 # reserve space for early malloc @@ -75,7 +76,8 @@ blt t0, t1, 1b nop

-#if CONFIG_VAL(SYS_MALLOC_F_LEN) +#if CONFIG_VAL(SYS_MALLOC_F_LEN) && \ + !CONFIG_IS_ENABLED(INIT_STACK_WITHOUT_MALLOC_F) PTR_S sp, GD_MALLOC_BASE(k0) # gd->malloc_base offset #endif .endm