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Diffstat (limited to '')
-rw-r--r-- | arch/powerpc/platforms/85xx/qemu_e500.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/85xx/qemu_e500.c b/arch/powerpc/platforms/85xx/qemu_e500.c new file mode 100644 index 000000000..1639e222c --- /dev/null +++ b/arch/powerpc/platforms/85xx/qemu_e500.c @@ -0,0 +1,72 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * 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. + */ + +#include <linux/kernel.h> +#include <linux/of.h> +#include <linux/of_fdt.h> +#include <linux/pgtable.h> +#include <asm/machdep.h> +#include <asm/time.h> +#include <asm/udbg.h> +#include <asm/mpic.h> +#include <asm/swiotlb.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(); + 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 CONFIG_PCI + .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, + .power_save = e500_idle, +}; |