Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-25 14:10:43 +00:00
Code Issues Projects Releases Packages Wiki Activity

x86: Check PIRQ routing table sanity in the F segment

Browse source 
Previously the PIRQ routing table sanity check was performed against
the original table provided by the platform codes. Now we switch to
check its sanity on the final table in the F segment as this one is
the one seen by the OS.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2015-04-27 14:16:01 +08:00 committed by Simon Glass
parent 8827227889
commit 283a08e52a
1 changed files with 13 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
arch/x86/lib/pirq_routing.c
View file

@ -110,11 +110,7 @@ void pirq_route_irqs(struct irq_info *irq, int num)
u32 copy_pirq_routing_table(u32 addr, struct irq_routing_table *rt)
{
if (rt->signature != PIRQ_SIGNATURE || rt->version != PIRQ_VERSION ||
rt->size % 16) {
debug("Interrupt Routing Table not valid\n");
return addr;
}
struct irq_routing_table *rom_rt;
/* Fix up the table checksum */
rt->checksum = table_compute_checksum(rt, rt->size);
@ -125,5 +121,17 @@ u32 copy_pirq_routing_table(u32 addr, struct irq_routing_table *rt)
debug("Copying Interrupt Routing Table to 0x%x\n", addr);
memcpy((void *)addr, rt, rt->size);
/*
* We do the sanity check here against the copied table after memcpy,
* as something might go wrong after the memcpy, which is normally
* due to the F segment decode is not turned on to systeam RAM.
*/
rom_rt = (struct irq_routing_table *)addr;
if (rom_rt->signature != PIRQ_SIGNATURE ||
rom_rt->version != PIRQ_VERSION || rom_rt->size % 16) {
printf("Interrupt Routing Table not valid\n");
return addr;
}
return addr + rt->size;
}