1 /*
2  * Paravirt target for a generic QEMU e500 machine
3  *
4  * This is intended to be a flexible device-tree-driven platform, not fixed
5  * to a particular piece of hardware or a particular spec of virtual hardware,
6  * beyond the assumption of an e500-family CPU.  Some things are still hardcoded
7  * here, such as MPIC, but this is a limitation of the current code rather than
8  * an interface contract with QEMU.
9  *
10  * Copyright 2012 Freescale Semiconductor Inc.
11  *
12  * This program is free software; you can redistribute  it and/or modify it
13  * under  the terms of  the GNU General  Public License as published by the
14  * Free Software Foundation;  either version 2 of the  License, or (at your
15  * option) any later version.
16  */
17 
18 #include <linux/kernel.h>
19 #include <linux/of_fdt.h>
20 #include <asm/machdep.h>
21 #include <asm/pgtable.h>
22 #include <asm/time.h>
23 #include <asm/udbg.h>
24 #include <asm/mpic.h>
25 #include <sysdev/fsl_soc.h>
26 #include <sysdev/fsl_pci.h>
27 #include "smp.h"
28 #include "mpc85xx.h"
29 
30 void __init qemu_e500_pic_init(void)
31 {
32 	struct mpic *mpic;
33 	unsigned int flags = MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU |
34 		MPIC_ENABLE_COREINT;
35 
36 	mpic = mpic_alloc(NULL, 0, flags, 0, 256, " OpenPIC  ");
37 
38 	BUG_ON(mpic == NULL);
39 	mpic_init(mpic);
40 }
41 
42 static void __init qemu_e500_setup_arch(void)
43 {
44 	ppc_md.progress("qemu_e500_setup_arch()", 0);
45 
46 	fsl_pci_assign_primary();
47 	swiotlb_detect_4g();
48 	mpc85xx_smp_init();
49 }
50 
51 /*
52  * Called very early, device-tree isn't unflattened
53  */
54 static int __init qemu_e500_probe(void)
55 {
56 	return !!of_machine_is_compatible("fsl,qemu-e500");
57 }
58 
59 machine_arch_initcall(qemu_e500, mpc85xx_common_publish_devices);
60 
61 define_machine(qemu_e500) {
62 	.name			= "QEMU e500",
63 	.probe			= qemu_e500_probe,
64 	.setup_arch		= qemu_e500_setup_arch,
65 	.init_IRQ		= qemu_e500_pic_init,
66 #ifdef CONFIG_PCI
67 	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
68 	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
69 #endif
70 	.get_irq		= mpic_get_coreint_irq,
71 	.calibrate_decr		= generic_calibrate_decr,
72 	.progress		= udbg_progress,
73 };
74