arch/powerpc/platforms/85xx/qemu_e500.c

   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
  29 void __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
  40 static void __init qemu_e500_setup_arch(void)
  41 {
  42         ppc_md.progress("qemu_e500_setup_arch()", 0);
  43
  44         fsl_pci_init();
  45         mpc85xx_smp_init();
  46 }
  47
  48 /*
  49  * Called very early, device-tree isn't unflattened
  50  */
  51 static int __init qemu_e500_probe(void)
  52 {
  53         unsigned long root = of_get_flat_dt_root();
  54
  55         return !!of_flat_dt_is_compatible(root, "fsl,qemu-e500");
  56 }
  57
  58 machine_device_initcall(qemu_e500, mpc85xx_common_publish_devices);
  59
  60 define_machine(qemu_e500) {
  61         .name                   = "QEMU e500",
  62         .probe                  = qemu_e500_probe,
  63         .setup_arch             = qemu_e500_setup_arch,
  64         .init_IRQ               = qemu_e500_pic_init,
  65 #ifdef CONFIG_PCI
  66         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
  67 #endif
  68         .get_irq                = mpic_get_irq,
  69         .restart                = fsl_rstcr_restart,
  70         .calibrate_decr         = generic_calibrate_decr,
  71         .progress               = udbg_progress,
  72 };