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ioport: add destructor method to IORange

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Previously all callers had a containing object with a destructor that
could be used to trigger cleanup of the IORange objects (typically
just freeing the containing object), but a forthcoming memory API
change doesn't fit this pattern.  Rather than setting up a new global
table, extend the ioport system to support destructors.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2012-03-05 17:36:19 +02:00
parent 2aeabc0817
commit c5b703ac20
3 changed files with 17 additions and 0 deletions
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15
ioport.c
View File

@ -52,6 +52,7 @@
static void *ioport_opaque[MAX_IOPORTS];
static IOPortReadFunc *ioport_read_table[3][MAX_IOPORTS];
static IOPortWriteFunc *ioport_write_table[3][MAX_IOPORTS];
static IOPortDestructor *ioport_destructor_table[MAX_IOPORTS];
static IOPortReadFunc default_ioport_readb, default_ioport_readw, default_ioport_readl;
static IOPortWriteFunc default_ioport_writeb, default_ioport_writew, default_ioport_writel;
@ -225,6 +226,15 @@ static void ioport_writel_thunk(void *opaque, uint32_t addr, uint32_t data)
ioport->ops->write(ioport, addr - ioport->base, 4, data);
}
static void iorange_destructor_thunk(void *opaque)
{
IORange *iorange = opaque;
if (iorange->ops->destructor) {
iorange->ops->destructor(iorange);
}
}
void ioport_register(IORange *ioport)
{
register_ioport_read(ioport->base, ioport->len, 1,
@ -239,12 +249,17 @@ void ioport_register(IORange *ioport)
ioport_writew_thunk, ioport);
register_ioport_write(ioport->base, ioport->len, 4,
ioport_writel_thunk, ioport);
ioport_destructor_table[ioport->base] = iorange_destructor_thunk;
}
void isa_unassign_ioport(pio_addr_t start, int length)
{
int i;
if (ioport_destructor_table[start]) {
ioport_destructor_table[start](ioport_opaque[start]);
ioport_destructor_table[start] = NULL;
}
for(i = start; i < start + length; i++) {
ioport_read_table[0][i] = NULL;
ioport_read_table[1][i] = NULL;

1
ioport.h
View File

@ -36,6 +36,7 @@ typedef uint32_t pio_addr_t;
/* These should really be in isa.h, but are here to make pc.h happy. */
typedef void (IOPortWriteFunc)(void *opaque, uint32_t address, uint32_t data);
typedef uint32_t (IOPortReadFunc)(void *opaque, uint32_t address);
typedef void (IOPortDestructor)(void *opaque);
void ioport_register(IORange *iorange);
int register_ioport_read(pio_addr_t start, int length, int size,

1
iorange.h
View File

@ -11,6 +11,7 @@ struct IORangeOps {
uint64_t *data);
void (*write)(IORange *iorange, uint64_t offset, unsigned width,
uint64_t data);
void (*destructor)(IORange *iorange);
};
struct IORange {