xref: /rk3399_rockchip-uboot/arch/powerpc/cpu/mpc83xx/interrupts.c (revision a47a12becf66f02a56da91c161e2edb625e9f20c)
1*a47a12beSStefan Roese /*
2*a47a12beSStefan Roese  * (C) Copyright 2000-2002
3*a47a12beSStefan Roese  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4*a47a12beSStefan Roese  *
5*a47a12beSStefan Roese  * Copyright 2004 Freescale Semiconductor, Inc.
6*a47a12beSStefan Roese  *
7*a47a12beSStefan Roese  * See file CREDITS for list of people who contributed to this
8*a47a12beSStefan Roese  * project.
9*a47a12beSStefan Roese  *
10*a47a12beSStefan Roese  * This program is free software; you can redistribute it and/or
11*a47a12beSStefan Roese  * modify it under the terms of the GNU General Public License as
12*a47a12beSStefan Roese  * published by the Free Software Foundation; either version 2 of
13*a47a12beSStefan Roese  * the License, or (at your option) any later version.
14*a47a12beSStefan Roese  *
15*a47a12beSStefan Roese  * This program is distributed in the hope that it will be useful,
16*a47a12beSStefan Roese  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17*a47a12beSStefan Roese  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18*a47a12beSStefan Roese  * GNU General Public License for more details.
19*a47a12beSStefan Roese  *
20*a47a12beSStefan Roese  * You should have received a copy of the GNU General Public License
21*a47a12beSStefan Roese  * along with this program; if not, write to the Free Software
22*a47a12beSStefan Roese  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23*a47a12beSStefan Roese  * MA 02111-1307 USA
24*a47a12beSStefan Roese  */
25*a47a12beSStefan Roese 
26*a47a12beSStefan Roese #include <common.h>
27*a47a12beSStefan Roese #include <command.h>
28*a47a12beSStefan Roese #include <mpc83xx.h>
29*a47a12beSStefan Roese #include <asm/processor.h>
30*a47a12beSStefan Roese 
31*a47a12beSStefan Roese DECLARE_GLOBAL_DATA_PTR;
32*a47a12beSStefan Roese 
33*a47a12beSStefan Roese struct irq_action {
34*a47a12beSStefan Roese 	interrupt_handler_t *handler;
35*a47a12beSStefan Roese 	void *arg;
36*a47a12beSStefan Roese 	ulong count;
37*a47a12beSStefan Roese };
38*a47a12beSStefan Roese 
39*a47a12beSStefan Roese int interrupt_init_cpu (unsigned *decrementer_count)
40*a47a12beSStefan Roese {
41*a47a12beSStefan Roese 	volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
42*a47a12beSStefan Roese 
43*a47a12beSStefan Roese 	*decrementer_count = (gd->bus_clk / 4) / CONFIG_SYS_HZ;
44*a47a12beSStefan Roese 
45*a47a12beSStefan Roese 	/* Enable e300 time base */
46*a47a12beSStefan Roese 
47*a47a12beSStefan Roese 	immr->sysconf.spcr |= 0x00400000;
48*a47a12beSStefan Roese 
49*a47a12beSStefan Roese 	return 0;
50*a47a12beSStefan Roese }
51*a47a12beSStefan Roese 
52*a47a12beSStefan Roese 
53*a47a12beSStefan Roese /*
54*a47a12beSStefan Roese  * Handle external interrupts
55*a47a12beSStefan Roese  */
56*a47a12beSStefan Roese 
57*a47a12beSStefan Roese void external_interrupt (struct pt_regs *regs)
58*a47a12beSStefan Roese {
59*a47a12beSStefan Roese }
60*a47a12beSStefan Roese 
61*a47a12beSStefan Roese 
62*a47a12beSStefan Roese /*
63*a47a12beSStefan Roese  * Install and free an interrupt handler.
64*a47a12beSStefan Roese  */
65*a47a12beSStefan Roese 
66*a47a12beSStefan Roese void
67*a47a12beSStefan Roese irq_install_handler (int irq, interrupt_handler_t * handler, void *arg)
68*a47a12beSStefan Roese {
69*a47a12beSStefan Roese }
70*a47a12beSStefan Roese 
71*a47a12beSStefan Roese 
72*a47a12beSStefan Roese void irq_free_handler (int irq)
73*a47a12beSStefan Roese {
74*a47a12beSStefan Roese }
75*a47a12beSStefan Roese 
76*a47a12beSStefan Roese 
77*a47a12beSStefan Roese void timer_interrupt_cpu (struct pt_regs *regs)
78*a47a12beSStefan Roese {
79*a47a12beSStefan Roese 	/* nothing to do here */
80*a47a12beSStefan Roese 	return;
81*a47a12beSStefan Roese }
82*a47a12beSStefan Roese 
83*a47a12beSStefan Roese 
84*a47a12beSStefan Roese #if defined(CONFIG_CMD_IRQ)
85*a47a12beSStefan Roese 
86*a47a12beSStefan Roese /* ripped this out of ppc4xx/interrupts.c */
87*a47a12beSStefan Roese 
88*a47a12beSStefan Roese /*
89*a47a12beSStefan Roese  * irqinfo - print information about PCI devices
90*a47a12beSStefan Roese  */
91*a47a12beSStefan Roese 
92*a47a12beSStefan Roese void
93*a47a12beSStefan Roese do_irqinfo(cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
94*a47a12beSStefan Roese {
95*a47a12beSStefan Roese }
96*a47a12beSStefan Roese 
97*a47a12beSStefan Roese #endif
98