4 files changed, 93 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/85xx/Kconfig b/arch/powerpc/platforms/85xx/Kconfig
index dddb3e51b91c..159c01e91463 100644
--- a/arch/powerpc/platforms/85xx/Kconfig
+++ b/arch/powerpc/platforms/85xx/Kconfig
@@ -254,6 +254,22 @@ config P5020_DS
         help
           This option enables support for the P5020 DS board
 
+config PPC_QEMU_E500
+        bool "QEMU generic e500 platform"
+        depends on EXPERIMENTAL
+        select DEFAULT_UIMAGE
+        help
+          This option enables support for running as a QEMU guest using
+          QEMU's generic e500 machine.  This is not required if you're
+          using a QEMU machine that targets a specific board, such as
+          mpc8544ds.
+
+          Unlike most e500 boards that target a specific CPU, this
+          platform works with any e500-family CPU that QEMU supports.
+          Thus, you'll need to make sure CONFIG_PPC_E500MC is set or
+          unset based on the emulated CPU (or actual host CPU in the case
+          of KVM).
+
 endif # FSL_SOC_BOOKE
 
 config TQM85xx
diff --git a/arch/powerpc/platforms/85xx/Makefile b/arch/powerpc/platforms/85xx/Makefile
index 30652e0bfb7f..3dfe81175036 100644
--- a/arch/powerpc/platforms/85xx/Makefile
+++ b/arch/powerpc/platforms/85xx/Makefile
@@ -27,3 +27,4 @@ obj-$(CONFIG_SOCRATES)    += socrates.o socrates_fpga_pic.o
 obj-$(CONFIG_KSI8560)     += ksi8560.o
 obj-$(CONFIG_XES_MPC85xx) += xes_mpc85xx.o
 obj-$(CONFIG_GE_IMP3A)    += ge_imp3a.o
+obj-$(CONFIG_PPC_QEMU_E500) += qemu_e500.o
diff --git a/arch/powerpc/platforms/85xx/qemu_e500.c b/arch/powerpc/platforms/85xx/qemu_e500.c
new file mode 100644
index 000000000000..95a2e53af71b
--- /dev/null
+++ b/arch/powerpc/platforms/85xx/qemu_e500.c
@@ -0,0 +1,72 @@
+/*
+ * 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/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;
+
+        mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU,
+                        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_init();
+        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_device_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,
+#endif
+        .get_irq                = mpic_get_irq,
+        .restart                = fsl_rstcr_restart,
+        .calibrate_decr         = generic_calibrate_decr,
+        .progress               = udbg_progress,
+};
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 61c9550819a2..30fd01de6bed 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -159,6 +159,10 @@ config PPC_E500MC
         bool "e500mc Support"
         select PPC_FPU
         depends on E500
+        help
+          This must be enabled for running on e500mc (and derivatives
+          such as e5500/e6500), and must be disabled for running on
+          e500v1 or e500v2.
 
 config PPC_FPU
         bool