diff options
| author | Bin Meng <bmeng.cn@gmail.com> | 2016-05-22 01:45:34 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2016-05-23 15:27:42 +0800 |
| commit | 911d6f693292dbf9b54de43f18ac95427e9accd8 (patch) | |
| tree | d93328fc48075a47398eb0754fcf0e5555735c66 /arch | |
| parent | e2126711af40ae669610d3500fe23c81b7ad6307 (diff) | |
| download | talos-obmc-uboot-911d6f693292dbf9b54de43f18ac95427e9accd8.tar.gz talos-obmc-uboot-911d6f693292dbf9b54de43f18ac95427e9accd8.zip | |
x86: quark: Assign a unique I/O APIC ID
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.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/cpu/quark/quark.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/cpu/quark/quark.c b/arch/x86/cpu/quark/quark.c index cf3fe7fb89..bdd360a99f 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; } |
