1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * r8a7779 processor support
4  *
5  * Copyright (C) 2011, 2013  Renesas Solutions Corp.
6  * Copyright (C) 2011  Magnus Damm
7  * Copyright (C) 2013  Cogent Embedded, Inc.
8  */
9 #include <linux/init.h>
10 #include <linux/irqchip.h>
11 
12 #include <asm/mach/arch.h>
13 #include <asm/mach/map.h>
14 
15 #include "common.h"
16 #include "r8a7779.h"
17 
18 static struct map_desc r8a7779_io_desc[] __initdata = {
19 	/* 2M identity mapping for 0xf0000000 (MPCORE) */
20 	{
21 		.virtual	= 0xf0000000,
22 		.pfn		= __phys_to_pfn(0xf0000000),
23 		.length		= SZ_2M,
24 		.type		= MT_DEVICE_NONSHARED
25 	},
26 	/* 16M identity mapping for 0xfexxxxxx (DMAC-S/HPBREG/INTC2/LRAM/DBSC) */
27 	{
28 		.virtual	= 0xfe000000,
29 		.pfn		= __phys_to_pfn(0xfe000000),
30 		.length		= SZ_16M,
31 		.type		= MT_DEVICE_NONSHARED
32 	},
33 };
34 
35 static void __init r8a7779_map_io(void)
36 {
37 	debug_ll_io_init();
38 	iotable_init(r8a7779_io_desc, ARRAY_SIZE(r8a7779_io_desc));
39 }
40 
41 /* IRQ */
42 #define INT2SMSKCR0 IOMEM(0xfe7822a0)
43 #define INT2SMSKCR1 IOMEM(0xfe7822a4)
44 #define INT2SMSKCR2 IOMEM(0xfe7822a8)
45 #define INT2SMSKCR3 IOMEM(0xfe7822ac)
46 #define INT2SMSKCR4 IOMEM(0xfe7822b0)
47 
48 #define INT2NTSR0 IOMEM(0xfe700060)
49 #define INT2NTSR1 IOMEM(0xfe700064)
50 
51 static void __init r8a7779_init_irq_dt(void)
52 {
53 	irqchip_init();
54 
55 	/* route all interrupts to ARM */
56 	__raw_writel(0xffffffff, INT2NTSR0);
57 	__raw_writel(0x3fffffff, INT2NTSR1);
58 
59 	/* unmask all known interrupts in INTCS2 */
60 	__raw_writel(0xfffffff0, INT2SMSKCR0);
61 	__raw_writel(0xfff7ffff, INT2SMSKCR1);
62 	__raw_writel(0xfffbffdf, INT2SMSKCR2);
63 	__raw_writel(0xbffffffc, INT2SMSKCR3);
64 	__raw_writel(0x003fee3f, INT2SMSKCR4);
65 }
66 
67 static const char *const r8a7779_compat_dt[] __initconst = {
68 	"renesas,r8a7779",
69 	NULL,
70 };
71 
72 DT_MACHINE_START(R8A7779_DT, "Generic R8A7779 (Flattened Device Tree)")
73 	.smp		= smp_ops(r8a7779_smp_ops),
74 	.map_io		= r8a7779_map_io,
75 	.init_irq	= r8a7779_init_irq_dt,
76 	.init_late	= shmobile_init_late,
77 	.dt_compat	= r8a7779_compat_dt,
78 MACHINE_END
79