3 * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * interrupts.c - just enough support for the decrementer/timer
30 #include <mpc8xx_irq.h>
31 #include <asm/processor.h>
35 int interrupt_init_cpu (unsigned *decrementer_count
)
37 #if defined(DEBUG) && !defined(CONFIG_AMIGAONEG3SE)
38 printf("interrupt_init: GT main cause reg: %08x:%08x\n",
39 GTREGREAD(LOW_INTERRUPT_CAUSE_REGISTER
),
40 GTREGREAD(HIGH_INTERRUPT_CAUSE_REGISTER
));
41 printf("interrupt_init: ethernet cause regs: %08x %08x %08x\n",
42 GTREGREAD(ETHERNET0_INTERRUPT_CAUSE_REGISTER
),
43 GTREGREAD(ETHERNET1_INTERRUPT_CAUSE_REGISTER
),
44 GTREGREAD(ETHERNET2_INTERRUPT_CAUSE_REGISTER
));
45 printf("interrupt_init: ethernet mask regs: %08x %08x %08x\n",
46 GTREGREAD(ETHERNET0_INTERRUPT_MASK_REGISTER
),
47 GTREGREAD(ETHERNET1_INTERRUPT_MASK_REGISTER
),
48 GTREGREAD(ETHERNET2_INTERRUPT_MASK_REGISTER
));
49 puts("interrupt_init: setting decrementer_count\n");
51 *decrementer_count
= get_tbclk() / CONFIG_SYS_HZ
;
56 /****************************************************************************/
59 * Handle external interrupts
62 external_interrupt(struct pt_regs
*regs
)
64 puts("external_interrupt (oops!)\n");
67 volatile ulong timestamp
= 0;
70 * timer_interrupt - gets called when the decrementer overflows,
71 * with interrupts disabled.
72 * Trivial implementation - no need to be really accurate.
75 timer_interrupt_cpu (struct pt_regs
*regs
)
77 /* nothing to do here */
81 /****************************************************************************/
84 * Install and free a interrupt handler.
88 irq_install_handler(int vec
, interrupt_handler_t
*handler
, void *arg
)
94 irq_free_handler(int vec
)
99 /****************************************************************************/
102 do_irqinfo(cmd_tbl_t
*cmdtp
, bd_t
*bd
, int flag
, int argc
, char *argv
[])
104 puts("IRQ related functions are unimplemented currently.\n");