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Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +02001/*
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 (440GX port)
9 * Travis B. Sawyer, Sandburst Corporation, tsawyer@sandburst.com
10 *
11 * (C) Copyright 2008 (PPC440X05 port for Virtex 5 FX)
12 * Ricardo Ribalda-Universidad Autonoma de Madrid-ricardo.ribalda@uam.es
13 * Work supported by Qtechnology (htpp://qtec.com)
14 *
15 * See file CREDITS for list of people who contributed to this
16 * project.
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License as
20 * published by the Free Software Foundation; either version 2 of
21 * the License, or (at your option) any later version.
22 *
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 * MA 02111-1307 USA
32 */
33
34#include <common.h>
35#include <watchdog.h>
36#include <command.h>
37#include <asm/processor.h>
38#include <asm/interrupt.h>
39#include <ppc4xx.h>
40#include <ppc_asm.tmpl>
41#include <commproc.h>
42
43#if (UIC_MAX > 3)
44#define UICB0_ALL (UIC_MASK(VECNUM_UIC1CI) | UIC_MASK(VECNUM_UIC1NCI) | \
45 UIC_MASK(VECNUM_UIC2CI) | UIC_MASK(VECNUM_UIC2NCI) | \
46 UIC_MASK(VECNUM_UIC3CI) | UIC_MASK(VECNUM_UIC3NCI))
47#elif (UIC_MAX > 2)
48#define UICB0_ALL (UIC_MASK(VECNUM_UIC1CI) | UIC_MASK(VECNUM_UIC1NCI) | \
49 UIC_MASK(VECNUM_UIC2CI) | UIC_MASK(VECNUM_UIC2NCI))
50#elif (UIC_MAX > 1)
51#define UICB0_ALL (UIC_MASK(VECNUM_UIC1CI) | UIC_MASK(VECNUM_UIC1NCI))
52#else
53#define UICB0_ALL 0
54#endif
55
56u32 get_dcr(u16);
57
58DECLARE_GLOBAL_DATA_PTR;
59
60void pic_enable(void)
61{
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +020062#if (UIC_MAX > 1)
63 /* Install the UIC1 handlers */
Stefan Roese60204d02008-07-18 12:24:41 +020064 irq_install_handler(VECNUM_UIC1NCI, (void *)(void *)external_interrupt, 0);
65 irq_install_handler(VECNUM_UIC1CI, (void *)(void *)external_interrupt, 0);
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +020066#endif
67#if (UIC_MAX > 2)
Stefan Roese60204d02008-07-18 12:24:41 +020068 irq_install_handler(VECNUM_UIC2NCI, (void *)(void *)external_interrupt, 0);
69 irq_install_handler(VECNUM_UIC2CI, (void *)(void *)external_interrupt, 0);
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +020070#endif
71#if (UIC_MAX > 3)
Stefan Roese60204d02008-07-18 12:24:41 +020072 irq_install_handler(VECNUM_UIC3NCI, (void *)(void *)external_interrupt, 0);
73 irq_install_handler(VECNUM_UIC3CI, (void *)(void *)external_interrupt, 0);
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +020074#endif
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +020075}
76
77/* Handler for UIC interrupt */
78static void uic_interrupt(u32 uic_base, int vec_base)
79{
80 u32 uic_msr;
81 u32 msr_shift;
82 int vec;
83
84 /*
85 * Read masked interrupt status register to determine interrupt source
86 */
87 uic_msr = get_dcr(uic_base + UIC_MSR);
88 msr_shift = uic_msr;
89 vec = vec_base;
90
91 while (msr_shift != 0) {
92 if (msr_shift & 0x80000000)
93 interrupt_run_handler(vec);
94 /*
95 * Shift msr to next position and increment vector
96 */
97 msr_shift <<= 1;
98 vec++;
99 }
100}
101
102/*
103 * Handle external interrupts
104 */
105void external_interrupt(struct pt_regs *regs)
106{
107 u32 uic_msr;
108
109 /*
110 * Read masked interrupt status register to determine interrupt source
111 */
112 uic_msr = mfdcr(uic0msr);
113
114#if (UIC_MAX > 1)
115 if ((UIC_MASK(VECNUM_UIC1CI) & uic_msr) ||
116 (UIC_MASK(VECNUM_UIC1NCI) & uic_msr))
117 uic_interrupt(UIC1_DCR_BASE, 32);
118#endif
119
120#if (UIC_MAX > 2)
121 if ((UIC_MASK(VECNUM_UIC2CI) & uic_msr) ||
122 (UIC_MASK(VECNUM_UIC2NCI) & uic_msr))
123 uic_interrupt(UIC2_DCR_BASE, 64);
124#endif
125
126#if (UIC_MAX > 3)
127 if ((UIC_MASK(VECNUM_UIC3CI) & uic_msr) ||
128 (UIC_MASK(VECNUM_UIC3NCI) & uic_msr))
129 uic_interrupt(UIC3_DCR_BASE, 96);
130#endif
131
Victor Gallardo5bc542a2008-08-28 16:03:28 -0700132 mtdcr(uic0sr, (uic_msr & UICB0_ALL));
133
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +0200134 if (uic_msr & ~(UICB0_ALL))
135 uic_interrupt(UIC0_DCR_BASE, 0);
136
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +0200137 return;
138}
139
140void pic_irq_ack(unsigned int vec)
141{
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +0200142 if ((vec >= 0) && (vec < 32))
143 mtdcr(uicsr, UIC_MASK(vec));
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +0200144 else if ((vec >= 32) && (vec < 64))
145 mtdcr(uic1sr, UIC_MASK(vec));
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +0200146 else if ((vec >= 64) && (vec < 96))
147 mtdcr(uic2sr, UIC_MASK(vec));
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +0200148 else if (vec >= 96)
149 mtdcr(uic3sr, UIC_MASK(vec));
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +0200150}
151
152/*
153 * Install and free a interrupt handler.
154 */
155void pic_irq_enable(unsigned int vec)
156{
157
158 if ((vec >= 0) && (vec < 32))
159 mtdcr(uicer, mfdcr(uicer) | UIC_MASK(vec));
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +0200160 else if ((vec >= 32) && (vec < 64))
161 mtdcr(uic1er, mfdcr(uic1er) | UIC_MASK(vec));
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +0200162 else if ((vec >= 64) && (vec < 96))
163 mtdcr(uic2er, mfdcr(uic2er) | UIC_MASK(vec));
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +0200164 else if (vec >= 96)
165 mtdcr(uic3er, mfdcr(uic3er) | UIC_MASK(vec));
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +0200166
167 debug("Install interrupt for vector %d ==> %p\n", vec, handler);
168}
169
170void pic_irq_disable(unsigned int vec)
171{
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +0200172 if ((vec >= 0) && (vec < 32))
173 mtdcr(uicer, mfdcr(uicer) & ~UIC_MASK(vec));
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +0200174 else if ((vec >= 32) && (vec < 64))
175 mtdcr(uic1er, mfdcr(uic1er) & ~UIC_MASK(vec));
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +0200176 else if ((vec >= 64) && (vec < 96))
177 mtdcr(uic2er, mfdcr(uic2er) & ~UIC_MASK(vec));
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +0200178 else if (vec >= 96)
179 mtdcr(uic3er, mfdcr(uic3er) & ~UIC_MASK(vec));
Ricardo Ribalda Delgadod865fd02008-07-17 11:44:12 +0200180}