/* * Paravirt target for a generic QEMU e500 machine * * This is intended to be a flexible device-tree-driven platform, not fixed * to a particular piece of hardware or a particular spec of virtual hardware, * beyond the assumption of an e500-family CPU. Some things are still hardcoded * here, such as MPIC, but this is a limitation of the current code rather than * an interface contract with QEMU. * * Copyright 2012 Freescale Semiconductor Inc. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #include <linux/kernel.h> #include <linux/of_fdt.h> #include <asm/machdep.h> #include <asm/pgtable.h> #include <asm/time.h> #include <asm/udbg.h> #include <asm/mpic.h> #include <sysdev/fsl_soc.h> #include <sysdev/fsl_pci.h> #include "smp.h" #include "mpc85xx.h" void __init qemu_e500_pic_init(void) { struct mpic *mpic; unsigned int flags = MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU | MPIC_ENABLE_COREINT; mpic = mpic_alloc(NULL, 0, flags, 0, 256, " OpenPIC "); BUG_ON(mpic == NULL); mpic_init(mpic); } static void __init qemu_e500_setup_arch(void) { ppc_md.progress("qemu_e500_setup_arch()", 0); fsl_pci_assign_primary(); swiotlb_detect_4g(); #if defined([31mCONFIG_FSL_PCI[0m) && defined([31mCONFIG_ZONE_DMA32[0m) /* * Inbound windows don't cover the full lower 4 GiB * due to conflicts with PCICSRBAR and outbound windows, * so limit the DMA32 zone to 2 GiB, to allow consistent * allocations to succeed. */ limit_zone_pfn(ZONE_DMA32, 1UL << (31 - PAGE_SHIFT)); #endif mpc85xx_smp_init(); } /* * Called very early, device-tree isn't unflattened */ static int __init qemu_e500_probe(void) { return !!of_machine_is_compatible("fsl,qemu-e500"); } machine_arch_initcall(qemu_e500, mpc85xx_common_publish_devices); define_machine(qemu_e500) { .name = "QEMU e500", .probe = qemu_e500_probe, .setup_arch = qemu_e500_setup_arch, .init_IRQ = qemu_e500_pic_init, #ifdef [31mCONFIG_PCI[0m .pcibios_fixup_bus = fsl_pcibios_fixup_bus, .pcibios_fixup_phb = fsl_pcibios_fixup_phb, #endif .get_irq = mpic_get_coreint_irq, .calibrate_decr = generic_calibrate_decr, .progress = udbg_progress, }; |