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ARM: Prepare Realtek RTD1195 

Introduce ARCH_REALTEK Kconfig option also for 32-bit Arm.

Override the text offset to cope with boot ROM occupying first 0xa800
bytes and further reservations up to 0xf4000 (compare Device Tree).

Add a custom machine_desc to enforce memory carveout for I/O registers.

Signed-off-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Andreas Färber 2017-10-05 03:59:15 +02:00
parent 8f3d9f3542
commit 86aeee4d0a
6 changed files with 59 additions and 0 deletions
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1
MAINTAINERS
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@ -2270,6 +2270,7 @@ L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
L: linux-realtek-soc@lists.infradead.org (moderated for non-subscribers)
S: Maintained
F: Documentation/devicetree/bindings/arm/realtek.yaml
F: arch/arm/mach-realtek/
F: arch/arm64/boot/dts/realtek/
ARM/RENESAS ARM64 ARCHITECTURE

2
arch/arm/Kconfig
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@ -698,6 +698,8 @@ source "arch/arm/mach-qcom/Kconfig"
source "arch/arm/mach-rda/Kconfig"
source "arch/arm/mach-realtek/Kconfig"
source "arch/arm/mach-realview/Kconfig"
source "arch/arm/mach-rockchip/Kconfig"

3
arch/arm/Makefile
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@ -148,6 +148,8 @@ head-y := arch/arm/kernel/head$(MMUEXT).o
textofs-y := 0x00008000
# We don't want the htc bootloader to corrupt kernel during resume
textofs-$(CONFIG_PM_H1940) := 0x00108000
# RTD1195 has Boot ROM at start of address space
textofs-$(CONFIG_ARCH_REALTEK) := 0x00108000
# SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
ifeq ($(CONFIG_ARCH_SA1100),y)
textofs-$(CONFIG_SA1111) := 0x00208000
@ -208,6 +210,7 @@ machine-$(CONFIG_ARCH_PICOXCELL) += picoxcell
machine-$(CONFIG_ARCH_PXA) += pxa
machine-$(CONFIG_ARCH_QCOM) += qcom
machine-$(CONFIG_ARCH_RDA) += rda
machine-$(CONFIG_ARCH_REALTEK) += realtek
machine-$(CONFIG_ARCH_REALVIEW) += realview
machine-$(CONFIG_ARCH_ROCKCHIP) += rockchip
machine-$(CONFIG_ARCH_RPC) += rpc

11
arch/arm/mach-realtek/Kconfig Normal file
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@ -0,0 +1,11 @@
# SPDX-License-Identifier: GPL-2.0-or-later
menuconfig ARCH_REALTEK
bool "Realtek SoCs"
depends on ARCH_MULTI_V7
select ARM_GIC
select ARM_GLOBAL_TIMER
select CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
select GENERIC_IRQ_CHIP
select RESET_CONTROLLER
help
This enables support for the Realtek RTD1195 SoC family.

2
arch/arm/mach-realtek/Makefile Normal file
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@ -0,0 +1,2 @@
# SPDX-License-Identifier: GPL-2.0-or-later
obj-y += rtd1195.o

40
arch/arm/mach-realtek/rtd1195.c Normal file
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@ -0,0 +1,40 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Realtek RTD1195
*
* Copyright (c) 2017-2019 Andreas Färber
*/
#include <linux/memblock.h>
#include <asm/mach/arch.h>
static void __init rtd1195_memblock_remove(phys_addr_t base, phys_addr_t size)
{
int ret;
ret = memblock_remove(base, size);
if (ret)
pr_err("Failed to remove memblock %pa (%d)\n", &base, ret);
}
static void __init rtd1195_reserve(void)
{
/* Exclude boot ROM from RAM */
rtd1195_memblock_remove(0x00000000, 0x0000a800);
/* Exclude peripheral register spaces from RAM */
rtd1195_memblock_remove(0x18000000, 0x00070000);
rtd1195_memblock_remove(0x18100000, 0x01000000);
}
static const char *const rtd1195_dt_compat[] __initconst = {
"realtek,rtd1195",
NULL
};
DT_MACHINE_START(rtd1195, "Realtek RTD1195")
.dt_compat = rtd1195_dt_compat,
.reserve = rtd1195_reserve,
.l2c_aux_val = 0x0,
.l2c_aux_mask = ~0x0,
MACHINE_END