tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Microwatt FPGA-based SoC platform setup code.
3 *
4 * Copyright 2020 Paul Mackerras (paulus@ozlabs.org), IBM Corp.
5 */
6
7#include <linux/types.h>
8#include <linux/kernel.h>
9#include <linux/stddef.h>
10#include <linux/init.h>
11#include <linux/of.h>
12#include <linux/of_platform.h>
13
14#include <asm/machdep.h>
15#include <asm/time.h>
16#include <asm/xics.h>
17#include <asm/udbg.h>
18
19#include "microwatt.h"
20
21static void __init microwatt_init_IRQ(void)
22{
23 xics_init();
24}
25
26static int __init microwatt_populate(void)
27{
28 return of_platform_default_populate(NULL, NULL, NULL);
29}
30machine_arch_initcall(microwatt, microwatt_populate);
31
32static int __init microwatt_probe(void)
33{
34 /* Main reason for having this is to start the other CPU(s) */
35 if (IS_ENABLED(CONFIG_SMP))
36 microwatt_init_smp();
37 return 1;
38}
39
40static void __init microwatt_setup_arch(void)
41{
42 microwatt_rng_init();
43}
44
45static void microwatt_idle(void)
46{
47 if (!prep_irq_for_idle_irqsoff())
48 return;
49
50 __asm__ __volatile__ ("wait");
51}
52
53define_machine(microwatt) {
54 .name = "microwatt",
55 .compatible = "microwatt-soc",
56 .probe = microwatt_probe,
57 .init_IRQ = microwatt_init_IRQ,
58 .setup_arch = microwatt_setup_arch,
59 .progress = udbg_progress,
60 .power_save = microwatt_idle,
61};