bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 1 | /* |
j_mayer | 3cbee15 | 2007-10-28 23:42:18 +0000 | [diff] [blame] | 2 | * Heathrow PIC support (OldWorld PowerMac) |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 3 | * |
j_mayer | 3cbee15 | 2007-10-28 23:42:18 +0000 | [diff] [blame] | 4 | * Copyright (c) 2005-2007 Fabrice Bellard |
| 5 | * Copyright (c) 2007 Jocelyn Mayer |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 6 | * |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 8 | * of this software and associated documentation files (the "Software"), to deal |
| 9 | * in the Software without restriction, including without limitation the rights |
| 10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 11 | * copies of the Software, and to permit persons to whom the Software is |
| 12 | * furnished to do so, subject to the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice shall be included in |
| 15 | * all copies or substantial portions of the Software. |
| 16 | * |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 23 | * THE SOFTWARE. |
| 24 | */ |
Peter Maydell | 90191d0 | 2016-01-26 18:17:19 +0000 | [diff] [blame] | 25 | #include "qemu/osdep.h" |
Paolo Bonzini | 83c9f4c | 2013-02-04 15:40:22 +0100 | [diff] [blame] | 26 | #include "hw/hw.h" |
| 27 | #include "hw/ppc/mac.h" |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 28 | |
blueswir1 | ea026b2 | 2008-12-24 09:38:16 +0000 | [diff] [blame] | 29 | /* debug PIC */ |
| 30 | //#define DEBUG_PIC |
| 31 | |
| 32 | #ifdef DEBUG_PIC |
Blue Swirl | 001faf3 | 2009-05-13 17:53:17 +0000 | [diff] [blame] | 33 | #define PIC_DPRINTF(fmt, ...) \ |
| 34 | do { printf("PIC: " fmt , ## __VA_ARGS__); } while (0) |
blueswir1 | ea026b2 | 2008-12-24 09:38:16 +0000 | [diff] [blame] | 35 | #else |
Blue Swirl | 001faf3 | 2009-05-13 17:53:17 +0000 | [diff] [blame] | 36 | #define PIC_DPRINTF(fmt, ...) |
blueswir1 | ea026b2 | 2008-12-24 09:38:16 +0000 | [diff] [blame] | 37 | #endif |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 38 | |
| 39 | typedef struct HeathrowPIC { |
| 40 | uint32_t events; |
| 41 | uint32_t mask; |
| 42 | uint32_t levels; |
| 43 | uint32_t level_triggered; |
| 44 | } HeathrowPIC; |
| 45 | |
pbrook | d537cf6 | 2007-04-07 18:14:41 +0000 | [diff] [blame] | 46 | typedef struct HeathrowPICS { |
Avi Kivity | 23c5e4c | 2011-08-08 16:09:17 +0300 | [diff] [blame] | 47 | MemoryRegion mem; |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 48 | HeathrowPIC pics[2]; |
j_mayer | 3cbee15 | 2007-10-28 23:42:18 +0000 | [diff] [blame] | 49 | qemu_irq *irqs; |
pbrook | d537cf6 | 2007-04-07 18:14:41 +0000 | [diff] [blame] | 50 | } HeathrowPICS; |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 51 | |
| 52 | static inline int check_irq(HeathrowPIC *pic) |
| 53 | { |
| 54 | return (pic->events | (pic->levels & pic->level_triggered)) & pic->mask; |
| 55 | } |
| 56 | |
| 57 | /* update the CPU irq state */ |
| 58 | static void heathrow_pic_update(HeathrowPICS *s) |
| 59 | { |
| 60 | if (check_irq(&s->pics[0]) || check_irq(&s->pics[1])) { |
j_mayer | 3cbee15 | 2007-10-28 23:42:18 +0000 | [diff] [blame] | 61 | qemu_irq_raise(s->irqs[0]); |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 62 | } else { |
j_mayer | 3cbee15 | 2007-10-28 23:42:18 +0000 | [diff] [blame] | 63 | qemu_irq_lower(s->irqs[0]); |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 64 | } |
| 65 | } |
| 66 | |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 67 | static void pic_write(void *opaque, hwaddr addr, |
Avi Kivity | 23c5e4c | 2011-08-08 16:09:17 +0300 | [diff] [blame] | 68 | uint64_t value, unsigned size) |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 69 | { |
| 70 | HeathrowPICS *s = opaque; |
| 71 | HeathrowPIC *pic; |
| 72 | unsigned int n; |
| 73 | |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 74 | n = ((addr & 0xfff) - 0x10) >> 4; |
blueswir1 | ea026b2 | 2008-12-24 09:38:16 +0000 | [diff] [blame] | 75 | PIC_DPRINTF("writel: " TARGET_FMT_plx " %u: %08x\n", addr, n, value); |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 76 | if (n >= 2) |
| 77 | return; |
| 78 | pic = &s->pics[n]; |
| 79 | switch(addr & 0xf) { |
| 80 | case 0x04: |
| 81 | pic->mask = value; |
| 82 | heathrow_pic_update(s); |
| 83 | break; |
| 84 | case 0x08: |
| 85 | /* do not reset level triggered IRQs */ |
| 86 | value &= ~pic->level_triggered; |
| 87 | pic->events &= ~value; |
| 88 | heathrow_pic_update(s); |
| 89 | break; |
| 90 | default: |
| 91 | break; |
| 92 | } |
| 93 | } |
| 94 | |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 95 | static uint64_t pic_read(void *opaque, hwaddr addr, |
Avi Kivity | 23c5e4c | 2011-08-08 16:09:17 +0300 | [diff] [blame] | 96 | unsigned size) |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 97 | { |
| 98 | HeathrowPICS *s = opaque; |
| 99 | HeathrowPIC *pic; |
| 100 | unsigned int n; |
| 101 | uint32_t value; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 102 | |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 103 | n = ((addr & 0xfff) - 0x10) >> 4; |
| 104 | if (n >= 2) { |
| 105 | value = 0; |
| 106 | } else { |
| 107 | pic = &s->pics[n]; |
| 108 | switch(addr & 0xf) { |
| 109 | case 0x0: |
| 110 | value = pic->events; |
| 111 | break; |
| 112 | case 0x4: |
| 113 | value = pic->mask; |
| 114 | break; |
| 115 | case 0xc: |
| 116 | value = pic->levels; |
| 117 | break; |
| 118 | default: |
| 119 | value = 0; |
| 120 | break; |
| 121 | } |
| 122 | } |
blueswir1 | ea026b2 | 2008-12-24 09:38:16 +0000 | [diff] [blame] | 123 | PIC_DPRINTF("readl: " TARGET_FMT_plx " %u: %08x\n", addr, n, value); |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 124 | return value; |
| 125 | } |
| 126 | |
Avi Kivity | 23c5e4c | 2011-08-08 16:09:17 +0300 | [diff] [blame] | 127 | static const MemoryRegionOps heathrow_pic_ops = { |
| 128 | .read = pic_read, |
| 129 | .write = pic_write, |
Alexander Graf | 0157644 | 2011-09-13 10:41:23 +0200 | [diff] [blame] | 130 | .endianness = DEVICE_LITTLE_ENDIAN, |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 131 | }; |
| 132 | |
pbrook | d537cf6 | 2007-04-07 18:14:41 +0000 | [diff] [blame] | 133 | static void heathrow_pic_set_irq(void *opaque, int num, int level) |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 134 | { |
| 135 | HeathrowPICS *s = opaque; |
| 136 | HeathrowPIC *pic; |
| 137 | unsigned int irq_bit; |
| 138 | |
| 139 | #if defined(DEBUG) |
| 140 | { |
| 141 | static int last_level[64]; |
| 142 | if (last_level[num] != level) { |
blueswir1 | ea026b2 | 2008-12-24 09:38:16 +0000 | [diff] [blame] | 143 | PIC_DPRINTF("set_irq: num=0x%02x level=%d\n", num, level); |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 144 | last_level[num] = level; |
| 145 | } |
| 146 | } |
| 147 | #endif |
| 148 | pic = &s->pics[1 - (num >> 5)]; |
| 149 | irq_bit = 1 << (num & 0x1f); |
| 150 | if (level) { |
| 151 | pic->events |= irq_bit & ~pic->level_triggered; |
| 152 | pic->levels |= irq_bit; |
| 153 | } else { |
| 154 | pic->levels &= ~irq_bit; |
| 155 | } |
| 156 | heathrow_pic_update(s); |
| 157 | } |
| 158 | |
Juan Quintela | 4acd38c | 2010-12-02 13:17:23 +0100 | [diff] [blame] | 159 | static const VMStateDescription vmstate_heathrow_pic_one = { |
| 160 | .name = "heathrow_pic_one", |
| 161 | .version_id = 0, |
| 162 | .minimum_version_id = 0, |
Juan Quintela | 3aff6c2 | 2014-04-16 15:24:04 +0200 | [diff] [blame] | 163 | .fields = (VMStateField[]) { |
Juan Quintela | 4acd38c | 2010-12-02 13:17:23 +0100 | [diff] [blame] | 164 | VMSTATE_UINT32(events, HeathrowPIC), |
| 165 | VMSTATE_UINT32(mask, HeathrowPIC), |
| 166 | VMSTATE_UINT32(levels, HeathrowPIC), |
| 167 | VMSTATE_UINT32(level_triggered, HeathrowPIC), |
| 168 | VMSTATE_END_OF_LIST() |
| 169 | } |
| 170 | }; |
blueswir1 | 9b64997 | 2008-12-30 19:01:19 +0000 | [diff] [blame] | 171 | |
Juan Quintela | 4acd38c | 2010-12-02 13:17:23 +0100 | [diff] [blame] | 172 | static const VMStateDescription vmstate_heathrow_pic = { |
| 173 | .name = "heathrow_pic", |
| 174 | .version_id = 1, |
| 175 | .minimum_version_id = 1, |
Juan Quintela | 3aff6c2 | 2014-04-16 15:24:04 +0200 | [diff] [blame] | 176 | .fields = (VMStateField[]) { |
Juan Quintela | 4acd38c | 2010-12-02 13:17:23 +0100 | [diff] [blame] | 177 | VMSTATE_STRUCT_ARRAY(pics, HeathrowPICS, 2, 1, |
| 178 | vmstate_heathrow_pic_one, HeathrowPIC), |
| 179 | VMSTATE_END_OF_LIST() |
| 180 | } |
| 181 | }; |
blueswir1 | 9b64997 | 2008-12-30 19:01:19 +0000 | [diff] [blame] | 182 | |
blueswir1 | 6e6b736 | 2008-12-28 18:27:10 +0000 | [diff] [blame] | 183 | static void heathrow_pic_reset_one(HeathrowPIC *s) |
| 184 | { |
| 185 | memset(s, '\0', sizeof(HeathrowPIC)); |
| 186 | } |
| 187 | |
| 188 | static void heathrow_pic_reset(void *opaque) |
| 189 | { |
| 190 | HeathrowPICS *s = opaque; |
| 191 | |
| 192 | heathrow_pic_reset_one(&s->pics[0]); |
| 193 | heathrow_pic_reset_one(&s->pics[1]); |
| 194 | |
| 195 | s->pics[0].level_triggered = 0; |
| 196 | s->pics[1].level_triggered = 0x1ff00000; |
| 197 | } |
| 198 | |
Avi Kivity | 23c5e4c | 2011-08-08 16:09:17 +0300 | [diff] [blame] | 199 | qemu_irq *heathrow_pic_init(MemoryRegion **pmem, |
j_mayer | 3cbee15 | 2007-10-28 23:42:18 +0000 | [diff] [blame] | 200 | int nb_cpus, qemu_irq **irqs) |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 201 | { |
| 202 | HeathrowPICS *s; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 203 | |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 204 | s = g_malloc0(sizeof(HeathrowPICS)); |
j_mayer | 3cbee15 | 2007-10-28 23:42:18 +0000 | [diff] [blame] | 205 | /* only 1 CPU */ |
| 206 | s->irqs = irqs[0]; |
Paolo Bonzini | 2c9b15c | 2013-06-06 05:41:28 -0400 | [diff] [blame] | 207 | memory_region_init_io(&s->mem, NULL, &heathrow_pic_ops, s, |
Avi Kivity | 23c5e4c | 2011-08-08 16:09:17 +0300 | [diff] [blame] | 208 | "heathrow-pic", 0x1000); |
| 209 | *pmem = &s->mem; |
j_mayer | 3cbee15 | 2007-10-28 23:42:18 +0000 | [diff] [blame] | 210 | |
Juan Quintela | 4acd38c | 2010-12-02 13:17:23 +0100 | [diff] [blame] | 211 | vmstate_register(NULL, -1, &vmstate_heathrow_pic, s); |
Jan Kiszka | a08d436 | 2009-06-27 09:25:07 +0200 | [diff] [blame] | 212 | qemu_register_reset(heathrow_pic_reset, s); |
pbrook | d537cf6 | 2007-04-07 18:14:41 +0000 | [diff] [blame] | 213 | return qemu_allocate_irqs(heathrow_pic_set_irq, s, 64); |
bellard | e68b9b2 | 2005-06-05 15:21:57 +0000 | [diff] [blame] | 214 | } |