[Qemu-devel] [PATCH v2] [0.12] Map BIOS f-segment as RAM, not as ROM

[Alexander Graf <agraf@suse.de>]

SeaBIOS needs to write to the f-segment. So it needs to have some way to set
that from read-only to read-write, write in it and when it's done set it to
read-only again.

On PCI we have a mechanism for that. The ISA machine does not though. To stay
regression free and happily enable users to continue using the -M isapc machine
let's just map it as RAM. The BIOS on PCI will set it to r/o later either way.

Signed-off-by: Alexander Graf <agraf@suse.de>

---

v1 -> v2:

  - always map r/w
---
 hw/pc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/hw/pc.c b/hw/pc.c
index 8c1b7ea..b5dabdd 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -1075,7 +1075,7 @@ static void pc_init1(ram_addr_t ram_size,
         isa_bios_size = 128 * 1024;
     cpu_register_physical_memory(0x100000 - isa_bios_size,
                                  isa_bios_size,
-                                 (bios_offset + bios_size - isa_bios_size) | IO_MEM_ROM);
+                                 (bios_offset + bios_size - isa_bios_size));
 
 
 
-- 
1.6.0.2