arch/arm/mach-shmobile/pm-rcar-gen2.c

Source file repositories/reference/linux-study-clean/arch/arm/mach-shmobile/pm-rcar-gen2.c

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-shmobile/pm-rcar-gen2.c
Extension
.c
Size
3285 bytes
Lines
131
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

resource_size(&res) < shmobile_boot_size) {
		pr_err("Invalid smp-sram region\n");
		return;
	}

	p = ioremap(res.start, resource_size(&res));
	if (!p)
		return;
	/*
	 * install the reset vector, use the largest version if we have enough
	 * memory available
	 */
	if (resource_size(&res) >= shmobile_boot_size_gen2) {
		shmobile_boot_cpu_gen2 = read_cpuid_mpidr();
		memcpy_toio(p, shmobile_boot_vector_gen2,
			    shmobile_boot_size_gen2);
	} else {
		memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
	}
	iounmap(p);

	/* setup reset vectors */
	p = ioremap(RST, 0x63);
	bar = phys_to_sbar(res.start);
	if (has_a15) {
		writel_relaxed(bar, p + CA15BAR);
		writel_relaxed(bar | SBAR_BAREN, p + CA15BAR);

		/* de-assert reset for CA15 CPUs */
		writel_relaxed((readl_relaxed(p + CA15RESCNT) &
				~CA15RESCNT_CPUS) | CA15RESCNT_CODE,
			       p + CA15RESCNT);
	}
	if (has_a7) {
		writel_relaxed(bar, p + CA7BAR);
		writel_relaxed(bar | SBAR_BAREN, p + CA7BAR);

		/* de-assert reset for CA7 CPUs */
		writel_relaxed((readl_relaxed(p + CA7RESCNT) &
				~CA7RESCNT_CPUS) | CA7RESCNT_CODE,
			       p + CA7RESCNT);
	}
	iounmap(p);

	shmobile_smp_apmu_suspend_init();
}

Annotation

Implementation Notes