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rockchip: rk3188: enable remap function

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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>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Heiko Stübner 2017-04-06 00:19:36 +02:00 committed by Simon Glass
parent 6499b1976c
commit 008a610b4c
2 changed files with 19 additions and 0 deletions
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1
arch/arm/mach-rockchip/Kconfig
View File

@ -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

18
arch/arm/mach-rockchip/rk3188-board.c
View File

@ -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)