1 /*
2 * Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
10 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
12 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
13 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
14 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
15 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
16 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
17 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
18 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 675 Mass Ave, Cambridge, MA 02139, USA.
23 */
24
25 #include "bcm47xx_private.h"
26
27 #include <linux/types.h>
28 #include <linux/interrupt.h>
29 #include <linux/irq.h>
30 #include <asm/setup.h>
31 #include <asm/irq_cpu.h>
32 #include <bcm47xx.h>
33
34 asmlinkage void plat_irq_dispatch(void)
35 {
36 u32 cause;
37
38 cause = read_c0_cause() & read_c0_status() & CAUSEF_IP;
39
40 clear_c0_status(cause);
41
42 if (cause & CAUSEF_IP7)
43 do_IRQ(7);
44 if (cause & CAUSEF_IP2)
45 do_IRQ(2);
46 if (cause & CAUSEF_IP3)
47 do_IRQ(3);
48 if (cause & CAUSEF_IP4)
49 do_IRQ(4);
50 if (cause & CAUSEF_IP5)
51 do_IRQ(5);
52 if (cause & CAUSEF_IP6)
53 do_IRQ(6);
54 }
55
56 #define DEFINE_HWx_IRQDISPATCH(x) \
57 static void bcm47xx_hw ## x ## _irqdispatch(void) \
58 { \
59 do_IRQ(x); \
60 }
61 DEFINE_HWx_IRQDISPATCH(2)
62 DEFINE_HWx_IRQDISPATCH(3)
63 DEFINE_HWx_IRQDISPATCH(4)
64 DEFINE_HWx_IRQDISPATCH(5)
65 DEFINE_HWx_IRQDISPATCH(6)
66 DEFINE_HWx_IRQDISPATCH(7)
67
68 void __init arch_init_irq(void)
69 {
70 /*
71 * This is the first arch callback after mm_init (we can use kmalloc),
72 * so let's finish bus initialization now.
73 */
74 bcm47xx_bus_setup();
75
76 #ifdef CONFIG_BCM47XX_BCMA
77 if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_BCMA) {
78 bcma_write32(bcm47xx_bus.bcma.bus.drv_mips.core,
79 BCMA_MIPS_MIPS74K_INTMASK(5), 1 << 31);
80 /*
81 * the kernel reads the timer irq from some register and thinks
82 * it's #5, but we offset it by 2 and route to #7
83 */
84 cp0_compare_irq = 7;
85 }
86 #endif
87 mips_cpu_irq_init();
88
89 if (cpu_has_vint) {
90 pr_info("Setting up vectored interrupts\n");
91 set_vi_handler(2, bcm47xx_hw2_irqdispatch);
92 set_vi_handler(3, bcm47xx_hw3_irqdispatch);
93 set_vi_handler(4, bcm47xx_hw4_irqdispatch);
94 set_vi_handler(5, bcm47xx_hw5_irqdispatch);
95 set_vi_handler(6, bcm47xx_hw6_irqdispatch);
96 set_vi_handler(7, bcm47xx_hw7_irqdispatch);
97 }
98 }