1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
/*
* (C) Copyright 2000-2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2002 (440 port)
* Scott McNutt, Artesyn Communication Producs, smcnutt@artsyncp.com
*
* (C) Copyright 2003 Motorola Inc. (MPC85xx port)
* Xianghua Xiao (X.Xiao@motorola.com)
*
* (C) Copyright 2004, 2007 Freescale Semiconductor. (MPC86xx Port)
* Jeff Brown
* Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <mpc86xx.h>
#include <command.h>
#include <asm/processor.h>
#include <ppc_asm.tmpl>
unsigned long decrementer_count; /* count value for 1e6/HZ microseconds */
unsigned long timestamp;
static __inline__ unsigned long get_msr(void)
{
unsigned long msr;
asm volatile ("mfmsr %0":"=r" (msr):);
return msr;
}
static __inline__ void set_msr(unsigned long msr)
{
asm volatile ("mtmsr %0"::"r" (msr));
}
static __inline__ unsigned long get_dec(void)
{
unsigned long val;
asm volatile ("mfdec %0":"=r" (val):);
return val;
}
static __inline__ void set_dec(unsigned long val)
{
if (val)
asm volatile ("mtdec %0"::"r" (val));
}
/* interrupt is not supported yet */
int interrupt_init_cpu(unsigned long *decrementer_count)
{
return 0;
}
int interrupt_init(void)
{
int ret;
volatile immap_t *immr = (immap_t *)CFG_IMMR;
immr->im_pic.gcr = MPC86xx_PICGCR_RST;
while (immr->im_pic.gcr & MPC86xx_PICGCR_RST);
immr->im_pic.gcr = MPC86xx_PICGCR_MODE;
/* call cpu specific function from $(CPU)/interrupts.c */
ret = interrupt_init_cpu(&decrementer_count);
if (ret)
return ret;
decrementer_count = get_tbclk() / CFG_HZ;
debug("interrupt init: tbclk() = %d MHz, decrementer_count = %ld\n",
(get_tbclk() / 1000000),
decrementer_count);
set_dec(decrementer_count);
set_msr(get_msr() | MSR_EE);
debug("MSR = 0x%08lx, Decrementer reg = 0x%08lx\n",
get_msr(),
get_dec());
#ifdef CONFIG_INTERRUPTS
volatile ccsr_pic_t *pic = &immr->im_pic;
pic->iivpr1 = 0x810001; /* 50220 enable mcm interrupts */
debug("iivpr1@%x = %x\n", &pic->iivpr1, pic->iivpr1);
pic->iivpr2 = 0x810002; /* 50240 enable ddr interrupts */
debug("iivpr2@%x = %x\n", &pic->iivpr2, pic->iivpr2);
pic->iivpr3 = 0x810003; /* 50260 enable lbc interrupts */
debug("iivpr3@%x = %x\n", &pic->iivpr3, pic->iivpr3);
#if defined(CONFIG_PCI1) || defined(CONFIG_PCIE1)
pic->iivpr8 = 0x810008; /* enable pcie1 interrupts */
debug("iivpr8@%x = %x\n", &pic->iivpr8, pic->iivpr8);
#endif
#if defined(CONFIG_PCI2) || defined(CONFIG_PCIE2)
pic->iivpr9 = 0x810009; /* enable pcie2 interrupts */
debug("iivpr9@%x = %x\n", &pic->iivpr9, pic->iivpr9);
#endif
pic->ctpr = 0; /* 40080 clear current task priority register */
#endif
return 0;
}
void enable_interrupts(void)
{
set_msr(get_msr() | MSR_EE);
}
/* returns flag if MSR_EE was set before */
int disable_interrupts(void)
{
ulong msr = get_msr();
set_msr(msr & ~MSR_EE);
return (msr & MSR_EE) != 0;
}
void increment_timestamp(void)
{
timestamp++;
}
/*
* timer_interrupt - gets called when the decrementer overflows,
* with interrupts disabled.
* Trivial implementation - no need to be really accurate.
*/
void timer_interrupt_cpu(struct pt_regs *regs)
{
/* nothing to do here */
}
void timer_interrupt(struct pt_regs *regs)
{
/* call cpu specific function from $(CPU)/interrupts.c */
timer_interrupt_cpu(regs);
timestamp++;
/* Restore Decrementer Count */
set_dec(decrementer_count);
#if defined(CONFIG_WATCHDOG) || defined (CONFIG_HW_WATCHDOG)
if ((timestamp % (CFG_WATCHDOG_FREQ)) == 0)
WATCHDOG_RESET();
#endif /* CONFIG_WATCHDOG || CONFIG_HW_WATCHDOG */
#ifdef CONFIG_STATUS_LED
status_led_tick(timestamp);
#endif /* CONFIG_STATUS_LED */
#ifdef CONFIG_SHOW_ACTIVITY
board_show_activity(timestamp);
#endif /* CONFIG_SHOW_ACTIVITY */
}
void reset_timer(void)
{
timestamp = 0;
}
ulong get_timer(ulong base)
{
return timestamp - base;
}
void set_timer(ulong t)
{
timestamp = t;
}
/*
* Install and free a interrupt handler. Not implemented yet.
*/
void irq_install_handler(int vec, interrupt_handler_t *handler, void *arg)
{
}
void irq_free_handler(int vec)
{
}
/*
* irqinfo - print information about PCI devices,not implemented.
*/
int do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
printf("\nInterrupt-unsupported:\n");
return 0;
}
/*
* Handle external interrupts
*/
void external_interrupt(struct pt_regs *regs)
{
puts("external_interrupt (oops!)\n");
}
|
