Most Rockchip socs have the ability to either map the bootrom or a sram area to the starting address of the cpu by flipping a bit in the GRF.

Newer socs leave this untouched and mapped to the bootrom but the legacy loaders on rk3188 and before enabled the remap functionality and the current smp implementation in the Linux kernel also requires it to be enabled, to bring up secondary cpus.

So to keep smp working in the kernel, mimic the behaviour of the legacy bootloaders and enable the remap functionality.

Signed-off-by: Heiko Stuebner heiko@sntech.de --- changes in v2: - drop the rk_board_late_init weak function If boards need even more specialized init we can worry about that later.

arch/arm/mach-rockchip/Kconfig | 1 + arch/arm/mach-rockchip/rk3188-board.c | 18 ++++++++++++++++++ 2 files changed, 19 insertions(+)

diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig index af0796d1d0..5b4caec953 100644 --- a/arch/arm/mach-rockchip/Kconfig +++ b/arch/arm/mach-rockchip/Kconfig @@ -18,6 +18,7 @@ config ROCKCHIP_RK3188 select SUPPORT_TPL select SPL select TPL + select BOARD_LATE_INIT select ROCKCHIP_BROM_HELPER help The Rockchip RK3188 is a ARM-based SoC with a quad-core Cortex-A9 diff --git a/arch/arm/mach-rockchip/rk3188-board.c b/arch/arm/mach-rockchip/rk3188-board.c index c370156e4c..4be711e441 100644 --- a/arch/arm/mach-rockchip/rk3188-board.c +++ b/arch/arm/mach-rockchip/rk3188-board.c @@ -11,6 +11,7 @@ #include <syscon.h> #include <asm/io.h> #include <asm/arch/clock.h> +#include <asm/arch/grf_rk3188.h> #include <asm/arch/periph.h> #include <asm/arch/pmu_rk3288.h> #include <asm/arch/boot_mode.h> @@ -19,6 +20,23 @@

DECLARE_GLOBAL_DATA_PTR;

+int board_late_init(void) +{ + struct rk3188_grf *grf; + + grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); + if (IS_ERR(grf)) { + error("grf syscon returned %ld\n", PTR_ERR(grf)); + } else { + /* enable noc remap to mimic legacy loaders */ + rk_clrsetreg(&grf->soc_con0, + NOC_REMAP_MASK << NOC_REMAP_SHIFT, + NOC_REMAP_MASK << NOC_REMAP_SHIFT); + } + + return 0; +} + int board_init(void) { #if defined(CONFIG_ROCKCHIP_SPL_BACK_TO_BROM)