The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 1 | /* Copyright (C) 2007-2008 The Android Open Source Project |
| 2 | ** |
| 3 | ** This software is licensed under the terms of the GNU General Public |
| 4 | ** License version 2, as published by the Free Software Foundation, and |
| 5 | ** may be copied, distributed, and modified under those terms. |
| 6 | ** |
| 7 | ** This program is distributed in the hope that it will be useful, |
| 8 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | ** GNU General Public License for more details. |
| 11 | */ |
| 12 | #include "qemu_file.h" |
| 13 | #include "goldfish_device.h" |
| 14 | |
| 15 | enum { |
| 16 | SW_NAME_LEN = 0x00, |
| 17 | SW_NAME_PTR = 0x04, |
| 18 | SW_FLAGS = 0x08, |
| 19 | SW_STATE = 0x0c, |
| 20 | SW_INT_STATUS = 0x10, |
| 21 | SW_INT_ENABLE = 0x14, |
| 22 | |
| 23 | SW_FLAGS_OUTPUT = 1U << 0 |
| 24 | }; |
| 25 | |
| 26 | |
| 27 | struct switch_state { |
| 28 | struct goldfish_device dev; |
| 29 | char *name; |
| 30 | uint32_t state; |
| 31 | uint32_t state_changed : 1; |
| 32 | uint32_t int_enable : 1; |
| 33 | uint32_t (*writefn)(void *opaque, uint32_t state); |
| 34 | void *writeopaque; |
| 35 | }; |
| 36 | |
| 37 | #define GOLDFISH_SWITCH_SAVE_VERSION 1 |
| 38 | |
| 39 | static void goldfish_switch_save(QEMUFile* f, void* opaque) |
| 40 | { |
| 41 | struct switch_state* s = opaque; |
| 42 | |
| 43 | qemu_put_be32(f, s->state); |
| 44 | qemu_put_byte(f, s->state_changed); |
| 45 | qemu_put_byte(f, s->int_enable); |
| 46 | } |
| 47 | |
| 48 | static int goldfish_switch_load(QEMUFile* f, void* opaque, int version_id) |
| 49 | { |
| 50 | struct switch_state* s = opaque; |
| 51 | |
| 52 | if (version_id != GOLDFISH_SWITCH_SAVE_VERSION) |
| 53 | return -1; |
| 54 | |
| 55 | s->state = qemu_get_be32(f); |
| 56 | s->state_changed = qemu_get_byte(f); |
| 57 | s->int_enable = qemu_get_byte(f); |
| 58 | |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | static uint32_t goldfish_switch_read(void *opaque, target_phys_addr_t offset) |
| 63 | { |
| 64 | struct switch_state *s = (struct switch_state *)opaque; |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 65 | |
| 66 | //printf("goldfish_switch_read %x %x\n", offset, size); |
| 67 | |
| 68 | switch (offset) { |
| 69 | case SW_NAME_LEN: |
| 70 | return strlen(s->name); |
| 71 | case SW_FLAGS: |
| 72 | return s->writefn ? SW_FLAGS_OUTPUT : 0; |
| 73 | case SW_STATE: |
| 74 | return s->state; |
| 75 | case SW_INT_STATUS: |
| 76 | if(s->state_changed && s->int_enable) { |
| 77 | s->state_changed = 0; |
| 78 | goldfish_device_set_irq(&s->dev, 0, 0); |
| 79 | return 1; |
| 80 | } |
| 81 | return 0; |
| 82 | default: |
| 83 | cpu_abort (cpu_single_env, "goldfish_switch_read: Bad offset %x\n", offset); |
| 84 | return 0; |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | static void goldfish_switch_write(void *opaque, target_phys_addr_t offset, uint32_t value) |
| 89 | { |
| 90 | struct switch_state *s = (struct switch_state *)opaque; |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 91 | |
| 92 | //printf("goldfish_switch_read %x %x %x\n", offset, value, size); |
| 93 | |
| 94 | switch(offset) { |
| 95 | case SW_NAME_PTR: |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 96 | cpu_memory_rw_debug(cpu_single_env, value, (void*)s->name, strlen(s->name), 1); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 97 | break; |
| 98 | |
| 99 | case SW_STATE: |
| 100 | if(s->writefn) { |
| 101 | uint32_t new_state; |
| 102 | new_state = s->writefn(s->writeopaque, value); |
| 103 | if(new_state != s->state) { |
| 104 | goldfish_switch_set_state(s, new_state); |
| 105 | } |
| 106 | } |
| 107 | else |
| 108 | cpu_abort (cpu_single_env, "goldfish_switch_write: write to SW_STATE on input\n"); |
| 109 | break; |
| 110 | |
| 111 | case SW_INT_ENABLE: |
| 112 | value &= 1; |
| 113 | if(s->state_changed && s->int_enable != value) |
| 114 | goldfish_device_set_irq(&s->dev, 0, value); |
| 115 | s->int_enable = value; |
| 116 | break; |
| 117 | |
| 118 | default: |
| 119 | cpu_abort (cpu_single_env, "goldfish_switch_write: Bad offset %x\n", offset); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | static CPUReadMemoryFunc *goldfish_switch_readfn[] = { |
| 124 | goldfish_switch_read, |
| 125 | goldfish_switch_read, |
| 126 | goldfish_switch_read |
| 127 | }; |
| 128 | |
| 129 | static CPUWriteMemoryFunc *goldfish_switch_writefn[] = { |
| 130 | goldfish_switch_write, |
| 131 | goldfish_switch_write, |
| 132 | goldfish_switch_write |
| 133 | }; |
| 134 | |
| 135 | void goldfish_switch_set_state(void *opaque, uint32_t state) |
| 136 | { |
| 137 | struct switch_state *s = opaque; |
| 138 | s->state_changed = 1; |
| 139 | s->state = state; |
| 140 | if(s->int_enable) |
| 141 | goldfish_device_set_irq(&s->dev, 0, 1); |
| 142 | } |
| 143 | |
| 144 | void *goldfish_switch_add(char *name, uint32_t (*writefn)(void *opaque, uint32_t state), void *writeopaque, int id) |
| 145 | { |
| 146 | int ret; |
| 147 | struct switch_state *s; |
| 148 | |
| 149 | s = qemu_mallocz(sizeof(*s)); |
| 150 | s->dev.name = "goldfish-switch"; |
| 151 | s->dev.id = id; |
| 152 | s->dev.size = 0x1000; |
| 153 | s->dev.irq_count = 1; |
| 154 | s->name = name; |
| 155 | s->writefn = writefn; |
| 156 | s->writeopaque = writeopaque; |
| 157 | |
| 158 | |
| 159 | ret = goldfish_device_add(&s->dev, goldfish_switch_readfn, goldfish_switch_writefn, s); |
| 160 | if(ret) { |
| 161 | qemu_free(s); |
| 162 | return NULL; |
| 163 | } |
| 164 | |
| 165 | register_savevm( "goldfish_switch", 0, GOLDFISH_SWITCH_SAVE_VERSION, |
| 166 | goldfish_switch_save, goldfish_switch_load, s); |
| 167 | |
| 168 | return s; |
| 169 | } |
| 170 | |