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arm: kirkwood: Move internal registers in arch_very_early_init() function

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Same change as was done for mvebu in commit 5bb2c550b1 ("arm: mvebu: Move
internal registers in arch_very_early_init() function") but for kirkwood.

Signed-off-by: Pali Rohár <pali@kernel.org>
Tested-by: Tony Dinh <mibodhi@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Pali Rohár 2023-03-11 11:57:01 +01:00 committed by Stefan Roese
parent 2a3bbced71
commit ae60fc6902
4 changed files with 15 additions and 3 deletions
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2
arch/arm/mach-kirkwood/Kconfig
View file

@ -5,9 +5,11 @@ config FEROCEON_88FR131
config KW88F6192
bool
select ARCH_VERY_EARLY_INIT
config KW88F6281
bool
select ARCH_VERY_EARLY_INIT
config SHEEVA_88SV131
bool

1
arch/arm/mach-kirkwood/Makefile
View file

@ -6,6 +6,7 @@
obj-y = cpu.o
obj-y += cache.o
obj-y += lowlevel.o
obj-y += mpp.o
# cpu.o and cache.o contain CP15 instructions which cannot be run in

3
arch/arm/mach-kirkwood/cpu.c
View file

@ -189,9 +189,6 @@ int arch_cpu_init(void)
struct kwcpu_registers *cpureg =
(struct kwcpu_registers *)KW_CPU_REG_BASE;
/* Linux expects the internal registers to be at 0xf1000000 */
writel(KW_REGS_PHY_BASE, KW_OFFSET_REG);
/* Enable and invalidate L2 cache in write through mode */
writel(readl(&cpureg->l2_cfg) | 0x18, &cpureg->l2_cfg);
invalidate_l2_cache();

12
arch/arm/mach-kirkwood/lowlevel.S Normal file
View file

@ -0,0 +1,12 @@
/* SPDX-License-Identifier: GPL-2.0+ */
#include <config.h>
#include <linux/linkage.h>
ENTRY(arch_very_early_init)
/* Move internal registers from KW_OFFSET_REG to KW_REGS_PHY_BASE */
ldr r0, =KW_REGS_PHY_BASE
ldr r1, =KW_OFFSET_REG
str r0, [r1]
bx lr
ENDPROC(arch_very_early_init)