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 <asm/machdep.h>
17 #include <asm/pgtable.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
qemu_e500_pic_init(void)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
qemu_e500_setup_arch(void)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 */
qemu_e500_probe(void)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
define_machine(qemu_e500)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 };
71
