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xen-devel
Re: [Xen-devel] [PATCH 3/12] VTPM mini-os: Add ioread() and iowrite() fu
Yeah your right, sorry about that! Heres a patch that applies on top of
the previous one to add volatile.
Signed off by: Matthew Fioravante <matthew.fioravante@xxxxxxxxxx>
On 03/11/2011 07:29 PM, Samuel Thibault wrote:
Matthew Fioravante, le Fri 11 Mar 2011 17:38:32 -0500, a écrit :
Mini-os currently doesn't have very many facilities for reading and
writing to hardware io memory. This patch addes a new header file
iorw.h which when included gives access to
the ioread8(), iread32(), iowrite8(), iowrite32() family of functions.
+void iowrite8(void* addr, uint8_t val)
+{
+ *((uint8_t*)addr) = val;
+}
+void iowrite32(void* addr, uint32_t val)
+{
+ *((uint32_t*)addr) = val;
+}
Don't you need a volatile qualifier on the cast pointer to not let the
compiler optimize it away?
Samuel
3-minios-iorw.patch2
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