arch/arm/mach-hisi/hisilicon.c

Source file repositories/reference/linux-study-clean/arch/arm/mach-hisi/hisilicon.c

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-hisi/hisilicon.c
Extension
.c
Size
1338 bytes
Lines
53
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 * (HiSilicon's SoC based) flattened device tree enabled machine
 *
 * Copyright (c) 2012-2013 HiSilicon Ltd.
 * Copyright (c) 2012-2013 Linaro Ltd.
 *
 * Author: Haojian Zhuang <haojian.zhuang@linaro.org>
*/

#include <linux/clocksource.h>
#include <linux/irqchip.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>

#define HI3620_SYSCTRL_PHYS_BASE		0xfc802000
#define HI3620_SYSCTRL_VIRT_BASE		0xfe802000

/*
 * This table is only for optimization. Since ioremap() could always share
 * the same mapping if it's defined as static IO mapping.
 *
 * Without this table, system could also work. The cost is some virtual address
 * spaces wasted since ioremap() may be called multi times for the same
 * IO space.
 */
static struct map_desc hi3620_io_desc[] __initdata = {
	{
		/* sysctrl */
		.pfn		= __phys_to_pfn(HI3620_SYSCTRL_PHYS_BASE),
		.virtual	= HI3620_SYSCTRL_VIRT_BASE,
		.length		= 0x1000,
		.type		= MT_DEVICE,
	},
};

static void __init hi3620_map_io(void)
{
	debug_ll_io_init();
	iotable_init(hi3620_io_desc, ARRAY_SIZE(hi3620_io_desc));
}

static const char *const hi3xxx_compat[] __initconst = {
	"hisilicon,hi3620-hi4511",
	NULL,
};

DT_MACHINE_START(HI3620, "Hisilicon Hi3620 (Flattened Device Tree)")
	.map_io		= hi3620_map_io,
	.dt_compat	= hi3xxx_compat,
MACHINE_END

Annotation

Implementation Notes