OpenE2K/qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

pam: partly fix write-only mode

Browse Source 
In write-only mode, writes are forwarded to RAM, while reads should not be
handled (ie should return 0xff).
Assume that in this mode, no read access is ever done, as they shouldn't
give any sensible result.

So, in write-only mode, alias PAM region to RAM, instead of PCI memory
(which can even be mapped to some device!)

This fixes Award BIOS, which use this mode to shadow system BIOS and video BIOS.

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Hervé Poussineau 2014-02-11 23:46:02 +01:00 committed by Michael S. Tsirkin
parent 15d914b18d
commit 175f099b30
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
hw/pci-host/pam.c
View File

@ -68,7 +68,7 @@ void init_pam(DeviceState *dev, MemoryRegion *ram_memory,
/* XXX: should distinguish read/write cases */
memory_region_init_alias(&mem->alias[0], OBJECT(dev), "pam-pci", pci_address_space,
start, size);
memory_region_init_alias(&mem->alias[2], OBJECT(dev), "pam-pci", pci_address_space,
memory_region_init_alias(&mem->alias[2], OBJECT(dev), "pam-pci", ram_memory,
start, size);
for (i = 0; i < 4; ++i) {