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 unsigned int flags = MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU | 33 MPIC_ENABLE_COREINT; 34 35 mpic = mpic_alloc(NULL, 0, flags, 0, 256, " OpenPIC "); 36 37 BUG_ON(mpic == NULL); 38 mpic_init(mpic); 39 } 40 41 static void __init qemu_e500_setup_arch(void) 42 { 43 ppc_md.progress("qemu_e500_setup_arch()", 0); 44 45 fsl_pci_assign_primary(); 46 swiotlb_detect_4g(); 47 mpc85xx_smp_init(); 48 } 49 50 /* 51 * Called very early, device-tree isn't unflattened 52 */ 53 static int __init qemu_e500_probe(void) 54 { 55 unsigned long root = of_get_flat_dt_root(); 56 57 return !!of_flat_dt_is_compatible(root, "fsl,qemu-e500"); 58 } 59 60 machine_arch_initcall(qemu_e500, mpc85xx_common_publish_devices); 61 62 define_machine(qemu_e500) { 63 .name = "QEMU e500", 64 .probe = qemu_e500_probe, 65 .setup_arch = qemu_e500_setup_arch, 66 .init_IRQ = qemu_e500_pic_init, 67 #ifdef CONFIG_PCI 68 .pcibios_fixup_bus = fsl_pcibios_fixup_bus, 69 #endif 70 .get_irq = mpic_get_coreint_irq, 71 .restart = fsl_rstcr_restart, 72 .calibrate_decr = generic_calibrate_decr, 73 .progress = udbg_progress, 74 }; 75