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
microwatt_init_IRQ(void)21 static void __init microwatt_init_IRQ(void)
22 {
23 xics_init();
24 }
25
microwatt_populate(void)26 static int __init microwatt_populate(void)
27 {
28 return of_platform_default_populate(NULL, NULL, NULL);
29 }
30 machine_arch_initcall(microwatt, microwatt_populate);
31
microwatt_probe(void)32 static 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
microwatt_setup_arch(void)40 static void __init microwatt_setup_arch(void)
41 {
42 microwatt_rng_init();
43 }
44
microwatt_idle(void)45 static void microwatt_idle(void)
46 {
47 if (!prep_irq_for_idle_irqsoff())
48 return;
49
50 __asm__ __volatile__ ("wait");
51 }
52
define_machine(microwatt)53 define_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 };
62