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author | Bernhard Beschow <shentey@gmail.com> | 2024-01-14 13:39:05 +0100 |
---|---|---|
committer | Michael S. Tsirkin <mst@redhat.com> | 2024-02-14 06:09:32 -0500 |
commit | ad2b652341f4257e2fb7ebf3834724f91173a07a (patch) | |
tree | f7a03900b29c41da3b906db53f421f99feb98f8b /system | |
parent | 4edee342f81397e8938ba7a80d1908c5103b66c8 (diff) | |
download | qemu-ad2b652341f4257e2fb7ebf3834724f91173a07a.zip qemu-ad2b652341f4257e2fb7ebf3834724f91173a07a.tar.gz qemu-ad2b652341f4257e2fb7ebf3834724f91173a07a.tar.bz2 |
exec/ioport: Add portio_list_set_address()
Some SuperI/O devices such as the VIA south bridges or the PC87312 controller
are able to relocate their SuperI/O functions. Add a convenience function for
implementing this in the VIA south bridges.
This convenience function relies on previous simplifications in exec/ioport
which avoids some duplicate synchronization of I/O port base addresses. The
naming of the function is inspired by its memory_region_set_address() pendant.
Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Message-Id: <20240114123911.4877-6-shentey@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'system')
-rw-r--r-- | system/ioport.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/system/ioport.c b/system/ioport.c index a59e58b..000e0ee 100644 --- a/system/ioport.c +++ b/system/ioport.c @@ -133,6 +133,7 @@ void portio_list_init(PortioList *piolist, piolist->nr = 0; piolist->regions = g_new0(MemoryRegion *, n); piolist->address_space = NULL; + piolist->addr = 0; piolist->opaque = opaque; piolist->owner = owner; piolist->name = name; @@ -282,6 +283,7 @@ void portio_list_add(PortioList *piolist, unsigned int off_low, off_high, off_last, count; piolist->address_space = address_space; + piolist->addr = start; /* Handle the first entry specially. */ off_last = off_low = pio_start->offset; @@ -322,6 +324,23 @@ void portio_list_del(PortioList *piolist) } } +void portio_list_set_address(PortioList *piolist, uint32_t addr) +{ + MemoryRegionPortioList *mrpio; + unsigned i, j; + + for (i = 0; i < piolist->nr; ++i) { + mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr); + memory_region_set_address(&mrpio->mr, + mrpio->mr.addr - piolist->addr + addr); + for (j = 0; mrpio->ports[j].size; ++j) { + mrpio->ports[j].offset += addr - piolist->addr; + } + } + + piolist->addr = addr; +} + static void memory_region_portio_list_finalize(Object *obj) { MemoryRegionPortioList *mrpio = MEMORY_REGION_PORTIO_LIST(obj); |