arch/sh/mm/consistent.c

Source file repositories/reference/linux-study-clean/arch/sh/mm/consistent.c

File Facts

System
Linux kernel
Corpus path
arch/sh/mm/consistent.c
Extension
.c
Size
1580 bytes
Lines
66
Domain
Architecture Layer
Bucket
arch/sh
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

if (!strncmp(name, p, k) && p[k] == '=') {
			p += k + 1;
			*sizep = memparse(p, NULL);
			pr_info("%s: forcing memory chunk size to 0x%08lx\n",
				name, *sizep);
			break;
		}
	}
}

int __init platform_resource_setup_memory(struct platform_device *pdev,
					  char *name, unsigned long memsize)
{
	struct resource *r;
	dma_addr_t dma_handle;
	void *buf;

	r = pdev->resource + pdev->num_resources - 1;
	if (r->flags) {
		pr_warn("%s: unable to find empty space for resource\n", name);
		return -EINVAL;
	}

	memchunk_cmdline_override(name, &memsize);
	if (!memsize)
		return 0;

	buf = dma_alloc_coherent(&pdev->dev, memsize, &dma_handle, GFP_KERNEL);
	if (!buf) {
		pr_warn("%s: unable to allocate memory\n", name);
		return -ENOMEM;
	}

	r->flags = IORESOURCE_MEM;
	r->start = dma_handle;
	r->end = r->start + memsize - 1;
	r->name = name;
	return 0;
}

Annotation

Implementation Notes