arch/powerpc/platforms/85xx/p2020.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Freescale P2020 board Setup
   4  *
   5  * Copyright 2007,2009,2012-2013 Freescale Semiconductor Inc.
   6  * Copyright 2022-2023 Pali Rohár <pali@kernel.org>
   7  */
   8
   9 #include <linux/stddef.h>
  10 #include <linux/kernel.h>
  11 #include <linux/of.h>
  12
  13 #include <asm/machdep.h>
  14 #include <asm/udbg.h>
  15 #include <asm/mpic.h>
  16 #include <asm/swiotlb.h>
  17 #include <asm/ppc-pci.h>
  18
  19 #include <sysdev/fsl_pci.h>
  20
  21 #include "smp.h"
  22 #include "mpc85xx.h"
  23
  24 static void __init p2020_pic_init(void)
  25 {
  26         struct mpic *mpic;
  27         int flags = MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU;
  28
  29         mpic = mpic_alloc(NULL, 0, flags, 0, 256, " OpenPIC  ");
  30
  31         if (WARN_ON(!mpic))
  32                 return;
  33
  34         mpic_init(mpic);
  35         mpc85xx_8259_init();
  36 }
  37
  38 /*
  39  * Setup the architecture
  40  */
  41 static void __init p2020_setup_arch(void)
  42 {
  43         swiotlb_detect_4g();
  44         fsl_pci_assign_primary();
  45         uli_init();
  46         mpc85xx_smp_init();
  47         mpc85xx_qe_par_io_init();
  48 }
  49
  50 /*
  51  * Called very early, device-tree isn't unflattened
  52  */
  53 static int __init p2020_probe(void)
  54 {
  55         struct device_node *p2020_cpu;
  56
  57         /*
  58          * There is no common compatible string for all P2020 boards.
  59          * The only common thing is "PowerPC,P2020@0" cpu node.
  60          * So check for P2020 board via this cpu node.
  61          */
  62         p2020_cpu = of_find_node_by_path("/cpus/PowerPC,P2020@0");
  63         of_node_put(p2020_cpu);
  64
  65         return !!p2020_cpu;
  66 }
  67
  68 machine_arch_initcall(p2020, mpc85xx_common_publish_devices);
  69
  70 define_machine(p2020) {
  71         .name                   = "Freescale P2020",
  72         .probe                  = p2020_probe,
  73         .setup_arch             = p2020_setup_arch,
  74         .init_IRQ               = p2020_pic_init,
  75 #ifdef CONFIG_PCI
  76         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
  77         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
  78 #endif
  79         .get_irq                = mpic_get_irq,
  80         .progress               = udbg_progress,
  81 };