1 /*
2 * linux/arch/arm/mm/mm-lusl7200.c
3 *
4 * Copyright (C) 2000 Steve Hill (sjhill@cotw.com)
5 *
6 * Extra MM routines for L7200 architecture
7 */
8 #include <linux/kernel.h>
9 #include <linux/init.h>
10 #include <linux/irq.h>
11 #include <linux/device.h>
12
13 #include <asm/types.h>
14 #include <asm/irq.h>
15 #include <asm/mach-types.h>
16 #include <mach/hardware.h>
17 #include <asm/page.h>
18
19 #include <asm/mach/arch.h>
20 #include <asm/mach/map.h>
21 #include <asm/mach/irq.h>
22
23 /*
24 * IRQ base register
25 */
26 #define IRQ_BASE (IO_BASE_2 + 0x1000)
27
28 /*
29 * Normal IRQ registers
30 */
31 #define IRQ_STATUS (*(volatile unsigned long *) (IRQ_BASE + 0x000))
32 #define IRQ_RAWSTATUS (*(volatile unsigned long *) (IRQ_BASE + 0x004))
33 #define IRQ_ENABLE (*(volatile unsigned long *) (IRQ_BASE + 0x008))
34 #define IRQ_ENABLECLEAR (*(volatile unsigned long *) (IRQ_BASE + 0x00c))
35 #define IRQ_SOFT (*(volatile unsigned long *) (IRQ_BASE + 0x010))
36 #define IRQ_SOURCESEL (*(volatile unsigned long *) (IRQ_BASE + 0x018))
37
38 /*
39 * Fast IRQ registers
40 */
41 #define FIQ_STATUS (*(volatile unsigned long *) (IRQ_BASE + 0x100))
42 #define FIQ_RAWSTATUS (*(volatile unsigned long *) (IRQ_BASE + 0x104))
43 #define FIQ_ENABLE (*(volatile unsigned long *) (IRQ_BASE + 0x108))
44 #define FIQ_ENABLECLEAR (*(volatile unsigned long *) (IRQ_BASE + 0x10c))
45 #define FIQ_SOFT (*(volatile unsigned long *) (IRQ_BASE + 0x110))
46 #define FIQ_SOURCESEL (*(volatile unsigned long *) (IRQ_BASE + 0x118))
47
l7200_mask_irq(unsigned int irq)48 static void l7200_mask_irq(unsigned int irq)
49 {
50 IRQ_ENABLECLEAR = 1 << irq;
51 }
52
l7200_unmask_irq(unsigned int irq)53 static void l7200_unmask_irq(unsigned int irq)
54 {
55 IRQ_ENABLE = 1 << irq;
56 }
57
58 static struct irq_chip l7200_irq_chip = {
59 .ack = l7200_mask_irq,
60 .mask = l7200_mask_irq,
61 .unmask = l7200_unmask_irq
62 };
63
l7200_init_irq(void)64 static void __init l7200_init_irq(void)
65 {
66 int irq;
67
68 IRQ_ENABLECLEAR = 0xffffffff; /* clear all interrupt enables */
69 FIQ_ENABLECLEAR = 0xffffffff; /* clear all fast interrupt enables */
70
71 for (irq = 0; irq < NR_IRQS; irq++) {
72 set_irq_chip(irq, &l7200_irq_chip);
73 set_irq_flags(irq, IRQF_VALID);
74 set_irq_handler(irq, handle_level_irq);
75 }
76
77 init_FIQ();
78 }
79
80 static struct map_desc l7200_io_desc[] __initdata = {
81 { IO_BASE, IO_START, IO_SIZE, MT_DEVICE },
82 { IO_BASE_2, IO_START_2, IO_SIZE_2, MT_DEVICE },
83 { AUX_BASE, AUX_START, AUX_SIZE, MT_DEVICE },
84 { FLASH1_BASE, FLASH1_START, FLASH1_SIZE, MT_DEVICE },
85 { FLASH2_BASE, FLASH2_START, FLASH2_SIZE, MT_DEVICE }
86 };
87
l7200_map_io(void)88 static void __init l7200_map_io(void)
89 {
90 iotable_init(l7200_io_desc, ARRAY_SIZE(l7200_io_desc));
91 }
92
93 MACHINE_START(L7200, "LinkUp Systems L7200")
94 /* Maintainer: Steve Hill / Scott McConnell */
95 .phys_io = 0x80040000,
96 .io_pg_offst = ((0xd0000000) >> 18) & 0xfffc,
97 .map_io = l7200_map_io,
98 .init_irq = l7200_init_irq,
99 MACHINE_END
100
101