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Diffstat (limited to 'arch/powerpc/platforms/85xx/qemu_e500.c')
-rw-r--r--arch/powerpc/platforms/85xx/qemu_e500.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/85xx/qemu_e500.c b/arch/powerpc/platforms/85xx/qemu_e500.c
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index 000000000..a4127b0b1
--- /dev/null
+++ b/arch/powerpc/platforms/85xx/qemu_e500.c
@@ -0,0 +1,70 @@
+// 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_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,
+};