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 
27 void __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 
39 static 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  */
51 static int __init qemu_e500_probe(void)
52 {
53 	return !!of_machine_is_compatible("fsl,qemu-e500");
54 }
55 
56 machine_arch_initcall(qemu_e500, mpc85xx_common_publish_devices);
57 
58 define_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 #ifdef CONFIG_PPC64
71 	.power_save		= book3e_idle,
72 #else
73 	.power_save		= e500_idle,
74 #endif
75 };
76