1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Paravirt target for a generic QEMU e500 machine 4 * 5 * This is intended to be a flexible device-tree-driven platform, not fixed 6 * to a particular piece of hardware or a particular spec of virtual hardware, 7 * beyond the assumption of an e500-family CPU. Some things are still hardcoded 8 * here, such as MPIC, but this is a limitation of the current code rather than 9 * an interface contract with QEMU. 10 * 11 * Copyright 2012 Freescale Semiconductor Inc. 12 */ 13 14 #include <linux/kernel.h> 15 #include <linux/of.h> 16 #include <linux/of_fdt.h> 17 #include <linux/pgtable.h> 18 #include <asm/machdep.h> 19 #include <asm/time.h> 20 #include <asm/udbg.h> 21 #include <asm/mpic.h> 22 #include <asm/swiotlb.h> 23 #include <sysdev/fsl_soc.h> 24 #include <sysdev/fsl_pci.h> 25 #include "smp.h" 26 #include "mpc85xx.h" 27 28 void __init qemu_e500_pic_init(void) 29 { 30 struct mpic *mpic; 31 unsigned int flags = MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU | 32 MPIC_ENABLE_COREINT; 33 34 mpic = mpic_alloc(NULL, 0, flags, 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_assign_primary(); 45 swiotlb_detect_4g(); 46 mpc85xx_smp_init(); 47 } 48 49 /* 50 * Called very early, device-tree isn't unflattened 51 */ 52 static int __init qemu_e500_probe(void) 53 { 54 return !!of_machine_is_compatible("fsl,qemu-e500"); 55 } 56 57 machine_arch_initcall(qemu_e500, mpc85xx_common_publish_devices); 58 59 define_machine(qemu_e500) { 60 .name = "QEMU e500", 61 .probe = qemu_e500_probe, 62 .setup_arch = qemu_e500_setup_arch, 63 .init_IRQ = qemu_e500_pic_init, 64 #ifdef CONFIG_PCI 65 .pcibios_fixup_bus = fsl_pcibios_fixup_bus, 66 .pcibios_fixup_phb = fsl_pcibios_fixup_phb, 67 #endif 68 .get_irq = mpic_get_coreint_irq, 69 .calibrate_decr = generic_calibrate_decr, 70 .progress = udbg_progress, 71 #ifdef CONFIG_PPC64 72 .power_save = book3e_idle, 73 #else 74 .power_save = e500_idle, 75 #endif 76 }; 77