| /* |
| * 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(CONFIG_FSL_PCI) && defined(CONFIG_ZONE_DMA32) |
| /* |
| * 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) |
| { |
| unsigned long root = of_get_flat_dt_root(); |
| |
| return !!of_flat_dt_is_compatible(root, "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 CONFIG_PCI |
| .pcibios_fixup_bus = fsl_pcibios_fixup_bus, |
| .pcibios_fixup_phb = fsl_pcibios_fixup_phb, |
| #endif |
| .get_irq = mpic_get_coreint_irq, |
| .restart = fsl_rstcr_restart, |
| .calibrate_decr = generic_calibrate_decr, |
| .progress = udbg_progress, |
| }; |
