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x86: quark: Assign a unique I/O APIC ID

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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>
This commit is contained in:
Bin Meng 2016-05-22 01:45:34 -07:00
parent e2126711af
commit 911d6f6932
1 changed files with 4 additions and 0 deletions
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4
arch/x86/cpu/quark/quark.c
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@ -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;
}