After power-on, both LAPIC and I/O APIC appear with the same APIC ID
zero, which creates an ID conflict. When generating MP table, U-Boot
reports zero as the LAPIC ID in the processor entry, and zero as the
I/O APIC ID in the I/O APIC as well as the I/O interrupt assignment
entries. Such MP table confuses Linux kernel and finally a kernel
panic is seen during boot:
BUG: unable to handle kernel paging request at ffff9000
IP: [<c101d462>] native_io_apic_write+0x22/0x30
*pdpt = 00000000014fb001 *pde = 00000000014ff067 *pte = 0000000000000000
Oops: 0002 [#1]
Modules linked in:
Pid: 1, comm: swapper Tainted: G W 3.8.7 #3 intel galileo/galileo
EIP: 0060:[<c101d462>] EFLAGS: 00010086 CPU: 0
EIP is at native_io_apic_write+0x22/0x30
...
Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009
Signed-off-by: Bin Meng <bmeng...@gmail.com>
---
arch/x86/cpu/quark/quark.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/x86/cpu/quark/quark.c b/arch/x86/cpu/quark/quark.c
index cf3fe7f..bdd360a 100644
--- a/arch/x86/cpu/quark/quark.c
+++ b/arch/x86/cpu/quark/quark.c
@@ -7,6 +7,7 @@
#include <common.h>
#include <mmc.h>
#include <asm/io.h>
+#include <asm/ioapic.h>
#include <asm/mrccache.h>
#include <asm/mtrr.h>
#include <asm/pci.h>
@@ -338,6 +339,9 @@ int arch_misc_init(void)
mrccache_save();
#endif
+ /* Assign a unique I/O APIC ID */
+ io_apic_set_id(1);
+
return 0;
}
--
1.8.2.1
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