arch/arm/mach-davinci/common.c

Source file repositories/reference/linux-study-clean/arch/arm/mach-davinci/common.c

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-davinci/common.c
Extension
.c
Size
2295 bytes
Lines
101
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: exported/initcall integration point
Status
integration 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

if ((dip->part_no == part_no) && (dip->variant == variant)) {
			soc_info->cpu_id = dip->cpu_id;
			pr_info("DaVinci %s variant 0x%x\n", dip->name,
					dip->variant);
			return 0;
		}

	pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id);
	return -EINVAL;
}

void __init davinci_common_init(const struct davinci_soc_info *soc_info)
{
	int ret;

	if (!soc_info) {
		ret = -EINVAL;
		goto err;
	}

	memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info));

	if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0))
		iotable_init(davinci_soc_info.io_desc,
				davinci_soc_info.io_desc_num);

	/*
	 * Normally devicemaps_init() would flush caches and tlb after
	 * mdesc->map_io(), but we must also do it here because of the CPU
	 * revision check below.
	 */
	local_flush_tlb_all();
	flush_cache_all();

	/*
	 * We want to check CPU revision early for cpu_is_xxxx() macros.
	 * IO space mapping must be initialized before we can do that.
	 */
	ret = davinci_init_id(&davinci_soc_info);
	if (ret < 0)
		goto err;


	return;

err:
	panic("davinci_common_init: SoC Initialization failed\n");
}

void __init davinci_init_late(void)
{
	davinci_cpufreq_init();
}

Annotation

Implementation Notes