]> git.kernelconcepts.de Git - karo-tx-uboot.git/blob - arch/powerpc/cpu/74xx_7xx/interrupts.c
karo: tx51: justify and adjust the delay required before releasing the ETN PHY strap...
[karo-tx-uboot.git] / arch / powerpc / cpu / 74xx_7xx / interrupts.c
1 /*
2  * (C) Copyright 2001
3  * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 /*
9  * interrupts.c - just enough support for the decrementer/timer
10  */
11
12 #include <common.h>
13 #include <mpc8xx.h>
14 #include <mpc8xx_irq.h>
15 #include <asm/processor.h>
16 #include <commproc.h>
17 #include <command.h>
18
19 int interrupt_init_cpu (unsigned *decrementer_count)
20 {
21         debug("interrupt_init: GT main cause reg: %08x:%08x\n",
22                GTREGREAD(LOW_INTERRUPT_CAUSE_REGISTER),
23                GTREGREAD(HIGH_INTERRUPT_CAUSE_REGISTER));
24         debug("interrupt_init: ethernet cause regs: %08x %08x %08x\n",
25                GTREGREAD(ETHERNET0_INTERRUPT_CAUSE_REGISTER),
26                GTREGREAD(ETHERNET1_INTERRUPT_CAUSE_REGISTER),
27                GTREGREAD(ETHERNET2_INTERRUPT_CAUSE_REGISTER));
28         debug("interrupt_init: ethernet mask regs:  %08x %08x %08x\n",
29                GTREGREAD(ETHERNET0_INTERRUPT_MASK_REGISTER),
30                GTREGREAD(ETHERNET1_INTERRUPT_MASK_REGISTER),
31                GTREGREAD(ETHERNET2_INTERRUPT_MASK_REGISTER));
32         debug("interrupt_init: setting decrementer_count\n");
33
34         *decrementer_count = get_tbclk() / CONFIG_SYS_HZ;
35
36         return (0);
37 }
38
39 /****************************************************************************/
40
41 /*
42  * Handle external interrupts
43  */
44 void
45 external_interrupt(struct pt_regs *regs)
46 {
47         puts("external_interrupt (oops!)\n");
48 }
49
50 volatile ulong timestamp = 0;
51
52 /*
53  * timer_interrupt - gets called when the decrementer overflows,
54  * with interrupts disabled.
55  * Trivial implementation - no need to be really accurate.
56  */
57 void
58 timer_interrupt_cpu (struct pt_regs *regs)
59 {
60         /* nothing to do here */
61         return;
62 }
63
64 /****************************************************************************/
65
66 /*
67  * Install and free a interrupt handler.
68  */
69
70 void
71 irq_install_handler(int vec, interrupt_handler_t *handler, void *arg)
72 {
73
74 }
75
76 void
77 irq_free_handler(int vec)
78 {
79
80 }
81
82 /****************************************************************************/
83
84 void
85 do_irqinfo(cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char * const argv[])
86 {
87         puts("IRQ related functions are unimplemented currently.\n");
88 }