1. 根目录:
2. arch
3. powerpc
4. platforms
5. 85xx
6. b4_qds.c

/*
 * B4 QDS Setup
 * Should apply for QDS platform of B4860 and it's personalities.
 * viz B4860/B4420/B4220QDS
 *
 * Copyright 2012 Freescale Semiconductor Inc.
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/phy.h>

#include <asm/time.h>
#include <asm/machdep.h>
#include <asm/pci-bridge.h>
#include <mm/mmu_decl.h>
#include <asm/prom.h>
#include <asm/udbg.h>
#include <asm/mpic.h>

#include <linux/of_platform.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
#include <asm/ehv_pic.h>

#include "corenet_ds.h"

/*
 * Called very early, device-tree isn't unflattened
 */
static int __init b4_qds_probe(void)
{
	unsigned long root = of_get_flat_dt_root();
#ifdef CONFIG_SMP
	extern struct smp_ops_t smp_85xx_ops;
#endif

	if ((of_flat_dt_is_compatible(root, "fsl,B4860QDS")) ||
		(of_flat_dt_is_compatible(root, "fsl,B4420QDS")) ||
			(of_flat_dt_is_compatible(root, "fsl,B4220QDS")))
		return 1;

	/* Check if we're running under the Freescale hypervisor */
	if ((of_flat_dt_is_compatible(root, "fsl,B4860QDS-hv")) ||
		(of_flat_dt_is_compatible(root, "fsl,B4420QDS-hv")) ||
			(of_flat_dt_is_compatible(root, "fsl,B4220QDS-hv"))) {
		ppc_md.init_IRQ = ehv_pic_init;
		ppc_md.get_irq = ehv_pic_get_irq;
		ppc_md.restart = fsl_hv_restart;
		ppc_md.power_off = fsl_hv_halt;
		ppc_md.halt = fsl_hv_halt;
#ifdef CONFIG_SMP
		/*
		 * Disable the timebase sync operations because we can't write
		 * to the timebase registers under the hypervisor.
		  */
		smp_85xx_ops.give_timebase = NULL;
		smp_85xx_ops.take_timebase = NULL;
#endif
		return 1;
	}

	return 0;
}

define_machine(b4_qds) {
	.name			= "B4 QDS",
	.probe			= b4_qds_probe,
	.setup_arch		= corenet_ds_setup_arch,
	.init_IRQ		= corenet_ds_pic_init,
#ifdef CONFIG_PCI
	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
#endif
/* coreint doesn't play nice with lazy EE, use legacy mpic for now */
#ifdef CONFIG_PPC64
	.get_irq		= mpic_get_irq,
#else
	.get_irq		= mpic_get_coreint_irq,
#endif
	.restart		= fsl_rstcr_restart,
	.calibrate_decr		= generic_calibrate_decr,
	.progress		= udbg_progress,
#ifdef CONFIG_PPC64
	.power_save		= book3e_idle,
#else
	.power_save		= e500_idle,
#endif
};

machine_arch_initcall(b4_qds, corenet_ds_publish_devices);

#ifdef CONFIG_SWIOTLB
machine_arch_initcall(b4_qds, swiotlb_setup_bus_notifier);
#endif