Revision 956a3e6b hw/pc.c
| b/hw/pc.c | ||
|---|---|---|
| 365 | 365 |
rtc_set_memory(s, 0x39, val); |
| 366 | 366 |
} |
| 367 | 367 |
|
| 368 |
void ioport_set_a20(int enable)
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| 368 |
static void handle_a20_line_change(void *opaque, int irq, int level)
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| 369 | 369 |
{
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| 370 |
/* XXX: send to all CPUs ? */ |
|
| 371 |
cpu_x86_set_a20(first_cpu, enable); |
|
| 372 |
} |
|
| 373 |
|
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| 374 |
int ioport_get_a20(void) |
|
| 375 |
{
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| 376 |
return ((first_cpu->a20_mask >> 20) & 1); |
|
| 377 |
} |
|
| 378 |
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| 379 |
static void ioport92_write(void *opaque, uint32_t addr, uint32_t val) |
|
| 380 |
{
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| 381 |
ioport_set_a20((val >> 1) & 1); |
|
| 382 |
/* XXX: bit 0 is fast reset */ |
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| 383 |
} |
|
| 370 |
CPUState *cpu = opaque; |
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| 384 | 371 |
|
| 385 |
static uint32_t ioport92_read(void *opaque, uint32_t addr) |
|
| 386 |
{
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| 387 |
return ioport_get_a20() << 1; |
|
| 372 |
/* XXX: send to all CPUs ? */ |
|
| 373 |
cpu_x86_set_a20(cpu, level); |
|
| 388 | 374 |
} |
| 389 | 375 |
|
| 390 | 376 |
/***********************************************************/ |
| ... | ... | |
| 935 | 921 |
int i; |
| 936 | 922 |
DriveInfo *fd[MAX_FD]; |
| 937 | 923 |
PITState *pit; |
| 924 |
qemu_irq *a20_line; |
|
| 925 |
ISADevice *i8042; |
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| 938 | 926 |
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| 939 | 927 |
register_ioport_write(0x80, 1, 1, ioport80_write, NULL); |
| 940 | 928 |
|
| ... | ... | |
| 944 | 932 |
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| 945 | 933 |
qemu_register_boot_set(pc_boot_set, *rtc_state); |
| 946 | 934 |
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| 947 |
register_ioport_read(0x92, 1, 1, ioport92_read, NULL); |
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| 948 |
register_ioport_write(0x92, 1, 1, ioport92_write, NULL); |
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| 949 |
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| 950 | 935 |
pit = pit_init(0x40, isa_reserve_irq(0)); |
| 951 | 936 |
pcspk_init(pit); |
| 952 | 937 |
if (!no_hpet) {
|
| ... | ... | |
| 965 | 950 |
} |
| 966 | 951 |
} |
| 967 | 952 |
|
| 968 |
isa_create_simple("i8042");
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| 953 |
a20_line = qemu_allocate_irqs(handle_a20_line_change, first_cpu, 1); |
|
| 954 |
i8042 = isa_create_simple("i8042");
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| 955 |
i8042_setup_a20_line(i8042, a20_line); |
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| 956 |
vmmouse_init(i8042); |
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| 957 |
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| 969 | 958 |
DMA_init(0); |
| 970 | 959 |
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| 971 | 960 |
for(i = 0; i < MAX_FD; i++) {
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