arch/arm/mach-mvebu/kirkwood.c

Source file repositories/reference/linux-study-clean/arch/arm/mach-mvebu/kirkwood.c

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-mvebu/kirkwood.c
Extension
.c
Size
4712 bytes
Lines
193
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

if (!pmac->name) {
			kfree(pmac);
			goto eth_fixup_no_mem;
		}

		macaddr = pmac->value;
		reg = readl(io + MV643XX_ETH_MAC_ADDR_HIGH);
		macaddr[0] = (reg >> 24) & 0xff;
		macaddr[1] = (reg >> 16) & 0xff;
		macaddr[2] = (reg >> 8) & 0xff;
		macaddr[3] = reg & 0xff;

		reg = readl(io + MV643XX_ETH_MAC_ADDR_LOW);
		macaddr[4] = (reg >> 8) & 0xff;
		macaddr[5] = reg & 0xff;

		of_update_property(np, pmac);

eth_fixup_no_mem:
		iounmap(io);
		clk_disable_unprepare(clk);
eth_fixup_no_map:
		clk_put(clk);
eth_fixup_skip:
		of_node_put(pnp);
	}
}

/*
 * Disable propagation of mbus errors to the CPU local bus, as this
 * causes mbus errors (which can occur for example for PCI aborts) to
 * throw CPU aborts, which we're not set up to deal with.
 */
static void kirkwood_disable_mbus_error_propagation(void)
{
	void __iomem *cpu_config;

	cpu_config = ioremap(CPU_CONFIG_PHYS, 4);
	writel(readl(cpu_config) & ~CPU_CONFIG_ERROR_PROP, cpu_config);
}

static struct of_dev_auxdata auxdata[] __initdata = {
	OF_DEV_AUXDATA("marvell,kirkwood-audio", 0xf10a0000,
		       "mvebu-audio", NULL),
	{ /* sentinel */ }
};

static void __init kirkwood_dt_init(void)
{
	kirkwood_disable_mbus_error_propagation();

	BUG_ON(mvebu_mbus_dt_init(false));

#ifdef CONFIG_CACHE_FEROCEON_L2
	feroceon_of_init();
#endif
	kirkwood_cpufreq_init();
	kirkwood_cpuidle_init();

	kirkwood_pm_init();
	kirkwood_dt_eth_fixup();

	of_platform_default_populate(NULL, auxdata, NULL);
}

static const char * const kirkwood_dt_board_compat[] __initconst = {
	"marvell,kirkwood",
	NULL
};

DT_MACHINE_START(KIRKWOOD_DT, "Marvell Kirkwood (Flattened Device Tree)")
	/* Maintainer: Jason Cooper <jason@lakedaemon.net> */
	.init_machine	= kirkwood_dt_init,
	.restart	= mvebu_restart,
	.dt_compat	= kirkwood_dt_board_compat,
MACHINE_END

Annotation

Implementation Notes