1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Paravirt target for a generic QEMU e500 machine
4 *
5 * This is intended to be a flexible device-tree-driven platform, not fixed
6 * to a particular piece of hardware or a particular spec of virtual hardware,
7 * beyond the assumption of an e500-family CPU.  Some things are still hardcoded
8 * here, such as MPIC, but this is a limitation of the current code rather than
9 * an interface contract with QEMU.
10 *
11 * Copyright 2012 Freescale Semiconductor Inc.
12 */
13
14#include <linux/kernel.h>
15#include <linux/of_fdt.h>
16#include <linux/pgtable.h>
17#include <asm/machdep.h>
18#include <asm/time.h>
19#include <asm/udbg.h>
20#include <asm/mpic.h>
21#include <asm/swiotlb.h>
22#include <sysdev/fsl_soc.h>
23#include <sysdev/fsl_pci.h>
24#include "smp.h"
25#include "mpc85xx.h"
26
27void __init qemu_e500_pic_init(void)
28{
29	struct mpic *mpic;
30	unsigned int flags = MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU |
31		MPIC_ENABLE_COREINT;
32
33	mpic = mpic_alloc(NULL, 0, flags, 0, 256, " OpenPIC  ");
34
35	BUG_ON(mpic == NULL);
36	mpic_init(mpic);
37}
38
39static void __init qemu_e500_setup_arch(void)
40{
41	ppc_md.progress("qemu_e500_setup_arch()", 0);
42
43	fsl_pci_assign_primary();
44	swiotlb_detect_4g();
45	mpc85xx_smp_init();
46}
47
48/*
49 * Called very early, device-tree isn't unflattened
50 */
51static int __init qemu_e500_probe(void)
52{
53	return !!of_machine_is_compatible("fsl,qemu-e500");
54}
55
56machine_arch_initcall(qemu_e500, mpc85xx_common_publish_devices);
57
58define_machine(qemu_e500) {
59	.name			= "QEMU e500",
60	.probe			= qemu_e500_probe,
61	.setup_arch		= qemu_e500_setup_arch,
62	.init_IRQ		= qemu_e500_pic_init,
63#ifdef CONFIG_PCI
64	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
65	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
66#endif
67	.get_irq		= mpic_get_coreint_irq,
68	.calibrate_decr		= generic_calibrate_decr,
69	.progress		= udbg_progress,
70};
71