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42d1f039 WD |
1 | /* |
2 | * (C) Copyright 2000-2002 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * (C) Copyright 2002 (440 port) | |
6 | * Scott McNutt, Artesyn Communication Producs, smcnutt@artsyncp.com | |
7 | * | |
8 | * (C) Copyright 2003 Motorola Inc. (MPC85xx port) | |
9 | * Xianghua Xiao (X.Xiao@motorola.com) | |
10 | * | |
11 | * See file CREDITS for list of people who contributed to this | |
12 | * project. | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or | |
15 | * modify it under the terms of the GNU General Public License as | |
16 | * published by the Free Software Foundation; either version 2 of | |
17 | * the License, or (at your option) any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with this program; if not, write to the Free Software | |
26 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
27 | * MA 02111-1307 USA | |
28 | */ | |
29 | ||
30 | #include <common.h> | |
31 | #include <watchdog.h> | |
32 | #include <command.h> | |
33 | #include <asm/processor.h> | |
34 | #include <ppc_asm.tmpl> | |
35 | ||
36 | unsigned decrementer_count; /* count value for 1e6/HZ microseconds */ | |
37 | ||
38 | static __inline__ unsigned long get_msr(void) | |
39 | { | |
40 | unsigned long msr; | |
41 | ||
42 | asm volatile("mfmsr %0" : "=r" (msr) :); | |
43 | return msr; | |
44 | } | |
45 | ||
46 | static __inline__ void set_msr(unsigned long msr) | |
47 | { | |
48 | asm volatile("mtmsr %0" : : "r" (msr)); | |
49 | asm volatile("isync"); | |
50 | } | |
51 | ||
343117bf WD |
52 | static __inline__ unsigned long get_dec (void) |
53 | { | |
54 | unsigned long val; | |
55 | ||
56 | asm volatile ("mfdec %0":"=r" (val):); | |
57 | ||
58 | return val; | |
59 | } | |
60 | ||
61 | ||
62 | static __inline__ void set_dec (unsigned long val) | |
63 | { | |
64 | if (val) | |
65 | asm volatile ("mtdec %0"::"r" (val)); | |
66 | } | |
67 | ||
42d1f039 WD |
68 | void enable_interrupts (void) |
69 | { | |
70 | set_msr (get_msr() | MSR_EE); | |
71 | } | |
72 | ||
73 | /* returns flag if MSR_EE was set before */ | |
74 | int disable_interrupts (void) | |
75 | { | |
76 | ulong msr = get_msr(); | |
77 | set_msr (msr & ~MSR_EE); | |
78 | return ((msr & MSR_EE) != 0); | |
79 | } | |
80 | ||
42d1f039 WD |
81 | int interrupt_init (void) |
82 | { | |
04db4008 | 83 | volatile ccsr_pic_t *pic = (void *)(CFG_MPC85xx_PIC_ADDR); |
343117bf | 84 | |
04db4008 KG |
85 | pic->gcr = MPC85xx_PICGCR_RST; |
86 | while (pic->gcr & MPC85xx_PICGCR_RST); | |
87 | pic->gcr = MPC85xx_PICGCR_M; | |
343117bf WD |
88 | decrementer_count = get_tbclk() / CFG_HZ; |
89 | mtspr(SPRN_TCR, TCR_PIE); | |
90 | set_dec (decrementer_count); | |
91 | set_msr (get_msr () | MSR_EE); | |
61a21e98 AF |
92 | |
93 | #ifdef CONFIG_INTERRUPTS | |
61a21e98 AF |
94 | pic->iivpr1 = 0x810002; /* 50220 enable ecm interrupts */ |
95 | debug("iivpr1@%x = %x\n",&pic->iivpr1, pic->iivpr1); | |
96 | ||
97 | pic->iivpr2 = 0x810002; /* 50240 enable ddr interrupts */ | |
98 | debug("iivpr2@%x = %x\n",&pic->iivpr2, pic->iivpr2); | |
99 | ||
100 | pic->iivpr3 = 0x810003; /* 50260 enable lbc interrupts */ | |
101 | debug("iivpr3@%x = %x\n",&pic->iivpr3, pic->iivpr3); | |
102 | ||
103 | #ifdef CONFIG_PCI1 | |
104 | pic->iivpr8 = 0x810008; /* enable pci1 interrupts */ | |
105 | debug("iivpr8@%x = %x\n",&pic->iivpr8, pic->iivpr8); | |
106 | #endif | |
107 | #if defined(CONFIG_PCI2) || defined(CONFIG_PCIE2) | |
108 | pic->iivpr9 = 0x810009; /* enable pci1 interrupts */ | |
109 | debug("iivpr9@%x = %x\n",&pic->iivpr9, pic->iivpr9); | |
110 | #endif | |
111 | #ifdef CONFIG_PCIE1 | |
112 | pic->iivpr10 = 0x81000a; /* enable pcie1 interrupts */ | |
113 | debug("iivpr10@%x = %x\n",&pic->iivpr10, pic->iivpr10); | |
114 | #endif | |
115 | #ifdef CONFIG_PCIE3 | |
116 | pic->iivpr11 = 0x81000b; /* enable pcie3 interrupts */ | |
117 | debug("iivpr11@%x = %x\n",&pic->iivpr11, pic->iivpr11); | |
118 | #endif | |
119 | ||
120 | pic->ctpr=0; /* 40080 clear current task priority register */ | |
121 | #endif | |
122 | ||
42d1f039 WD |
123 | return (0); |
124 | } | |
125 | ||
126 | /* | |
127 | * Install and free a interrupt handler. Not implemented yet. | |
128 | */ | |
129 | ||
130 | void | |
131 | irq_install_handler(int vec, interrupt_handler_t *handler, void *arg) | |
132 | { | |
133 | return; | |
134 | } | |
135 | ||
136 | void | |
137 | irq_free_handler(int vec) | |
138 | { | |
139 | return; | |
140 | } | |
141 | ||
142 | /****************************************************************************/ | |
143 | ||
144 | ||
145 | volatile ulong timestamp = 0; | |
146 | ||
147 | /* | |
148 | * timer_interrupt - gets called when the decrementer overflows, | |
149 | * with interrupts disabled. | |
150 | * Trivial implementation - no need to be really accurate. | |
151 | */ | |
152 | void timer_interrupt(struct pt_regs *regs) | |
153 | { | |
42d1f039 | 154 | timestamp++; |
343117bf WD |
155 | set_dec (decrementer_count); |
156 | mtspr(SPRN_TSR, TSR_PIS); | |
42d1f039 WD |
157 | #if defined(CONFIG_WATCHDOG) |
158 | if ((timestamp % 1000) == 0) | |
159 | reset_85xx_watchdog(); | |
160 | #endif /* CONFIG_WATCHDOG */ | |
161 | } | |
162 | ||
163 | void reset_timer (void) | |
164 | { | |
165 | timestamp = 0; | |
166 | } | |
167 | ||
168 | ulong get_timer (ulong base) | |
169 | { | |
170 | return (timestamp - base); | |
171 | } | |
172 | ||
173 | void set_timer (ulong t) | |
174 | { | |
175 | timestamp = t; | |
176 | } | |
177 | ||
4431283c | 178 | #if defined(CONFIG_CMD_IRQ) |
42d1f039 WD |
179 | |
180 | /******************************************************************************* | |
181 | * | |
182 | * irqinfo - print information about PCI devices,not implemented. | |
183 | * | |
184 | */ | |
185 | int | |
186 | do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) | |
187 | { | |
188 | printf ("\nInterrupt-unsupported:\n"); | |
189 | ||
190 | return 0; | |
191 | } | |
192 | ||
4431283c | 193 | #endif |