LXR linux/arch/powerpc/platforms/85xx/qemu

   1/*
   2 * Paravirt target for a generic QEMU e500 machine
   3 *
   4 * This is intended to be a flexible device-tree-driven platform, not fixed
   5 * to a particular piece of hardware or a particular spec of virtual hardware,
   6 * beyond the assumption of an e500-family CPU.  Some things are still hardcoded
   7 * here, such as MPIC, but this is a limitation of the current code rather than
   8 * an interface contract with QEMU.
   9 *
  10 * Copyright 2012 Freescale Semiconductor Inc.
  11 *
  12 * This program is free software; you can redistribute  it and/or modify it
  13 * under  the terms of  the GNU General  Public License as published by the
  14 * Free Software Foundation;  either version 2 of the  License, or (at your
  15 * option) any later version.
  16 */
  17
  18#include <linux/kernel.h>
  19#include <linux/of_fdt.h>
  20#include <asm/machdep.h>
  21#include <asm/time.h>
  22#include <asm/udbg.h>
  23#include <asm/mpic.h>
  24#include <sysdev/fsl_soc.h>
  25#include <sysdev/fsl_pci.h>
  26#include "smp.h"
  27#include "mpc85xx.h"
  28
  29void __init qemu_e500_pic_init(void)
  30{
  31        struct mpic *mpic;
  32
  33        mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU,
  34                        0, 256, " OpenPIC  ");
  35
  36        BUG_ON(mpic == NULL);
  37        mpic_init(mpic);
  38}
  39
  40static void __init qemu_e500_setup_arch(void)
  41{
  42        ppc_md.progress("qemu_e500_setup_arch()", 0);
  43
  44        fsl_pci_assign_primary();
  45        swiotlb_detect_4g();
  46        mpc85xx_smp_init();
  47}
  48
  49/*
  50 * Called very early, device-tree isn't unflattened
  51 */
  52static int __init qemu_e500_probe(void)
  53{
  54        unsigned long root = of_get_flat_dt_root();
  55
  56        return !!of_flat_dt_is_compatible(root, "fsl,qemu-e500");
  57}
  58
  59machine_arch_initcall(qemu_e500, mpc85xx_common_publish_devices);
  60
  61define_machine(qemu_e500) {
  62        .name                   = "QEMU e500",
  63        .probe                  = qemu_e500_probe,
  64        .setup_arch             = qemu_e500_setup_arch,
  65        .init_IRQ               = qemu_e500_pic_init,
  66#ifdef CONFIG_PCI
  67        .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
  68#endif
  69        .get_irq                = mpic_get_irq,
  70        .restart                = fsl_rstcr_restart,
  71        .calibrate_decr         = generic_calibrate_decr,
  72        .progress               = udbg_progress,
  73};
  74