arch/powerpc/platforms/85xx/p1023_rdb.c

Source file repositories/reference/linux-study-clean/arch/powerpc/platforms/85xx/p1023_rdb.c

File Facts

System
Linux kernel
Corpus path
arch/powerpc/platforms/85xx/p1023_rdb.c
Extension
.c
Size
2415 bytes
Lines
108
Domain
Architecture Layer
Bucket
arch/powerpc
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 (!bcsr_regs) {
			printk(KERN_ERR
			       "BCSR: Failed to map bcsr register space\n");
			return;
		} else {
#define BCSR15_I2C_BUS0_SEG_CLR		0x07
#define BCSR15_I2C_BUS0_SEG2		0x02
/*
 * Note: Accessing exclusively i2c devices.
 *
 * The i2c controller selects initially ID EEPROM in the u-boot;
 * but if menu configuration selects RTC support in the kernel,
 * the i2c controller switches to select RTC chip in the kernel.
 */
#ifdef CONFIG_RTC_CLASS
			/* Enable RTC chip on the segment #2 of i2c */
			clrbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG_CLR);
			setbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG2);
#endif

			iounmap(bcsr_regs);
		}
	}

	mpc85xx_smp_init();

	fsl_pci_assign_primary();
}

machine_arch_initcall(p1023_rdb, mpc85xx_common_publish_devices);

static void __init p1023_rdb_pic_init(void)
{
	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
		MPIC_SINGLE_DEST_CPU,
		0, 256, " OpenPIC  ");

	BUG_ON(mpic == NULL);

	mpic_init(mpic);
}

define_machine(p1023_rdb) {
	.name			= "P1023 RDB",
	.compatible		= "fsl,P1023RDB",
	.setup_arch		= p1023_rdb_setup_arch,
	.init_IRQ		= p1023_rdb_pic_init,
	.get_irq		= mpic_get_irq,
	.progress		= udbg_progress,
#ifdef CONFIG_PCI
	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
#endif
};

Annotation

Implementation Notes