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authorIsaku Yamahata <yamahata@valinux.co.jp>2008-05-19 09:13:33 -0400
committerTony Luck <tony.luck@intel.com>2008-05-27 17:39:54 -0400
commit3e0879deb700f322f6c81ab34f056fc72d15ec02 (patch)
treefadecbdca3170bfce52d9a954b594bc8e293e879 /arch/ia64/kernel/head.S
parent90aeb169c03a96e22674741f08054023c33d595b (diff)
[IA64] pvops: add an early setup hook for pv_ops.
This patch adds a setup hook in the very early boot sequence before start_kernel() to initialize paravirtualization stuff. The hook will be set by each pv loader code or by using multi entry point. Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/kernel/head.S')
-rw-r--r--arch/ia64/kernel/head.S41
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/ia64/kernel/head.S b/arch/ia64/kernel/head.S
index ddeab4e36fd5..db540e58c783 100644
--- a/arch/ia64/kernel/head.S
+++ b/arch/ia64/kernel/head.S
@@ -26,11 +26,14 @@
26#include <asm/mmu_context.h> 26#include <asm/mmu_context.h>
27#include <asm/asm-offsets.h> 27#include <asm/asm-offsets.h>
28#include <asm/pal.h> 28#include <asm/pal.h>
29#include <asm/paravirt.h>
29#include <asm/pgtable.h> 30#include <asm/pgtable.h>
30#include <asm/processor.h> 31#include <asm/processor.h>
31#include <asm/ptrace.h> 32#include <asm/ptrace.h>
32#include <asm/system.h> 33#include <asm/system.h>
33#include <asm/mca_asm.h> 34#include <asm/mca_asm.h>
35#include <linux/init.h>
36#include <linux/linkage.h>
34 37
35#ifdef CONFIG_HOTPLUG_CPU 38#ifdef CONFIG_HOTPLUG_CPU
36#define SAL_PSR_BITS_TO_SET \ 39#define SAL_PSR_BITS_TO_SET \
@@ -367,6 +370,44 @@ start_ap:
367 ;; 370 ;;
368(isBP) st8 [r2]=r28 // save the address of the boot param area passed by the bootloader 371(isBP) st8 [r2]=r28 // save the address of the boot param area passed by the bootloader
369 372
373#ifdef CONFIG_PARAVIRT
374
375 movl r14=hypervisor_setup_hooks
376 movl r15=hypervisor_type
377 mov r16=num_hypervisor_hooks
378 ;;
379 ld8 r2=[r15]
380 ;;
381 cmp.ltu p7,p0=r2,r16 // array size check
382 shladd r8=r2,3,r14
383 ;;
384(p7) ld8 r9=[r8]
385 ;;
386(p7) mov b1=r9
387(p7) cmp.ne.unc p7,p0=r9,r0 // no actual branch to NULL
388 ;;
389(p7) br.call.sptk.many rp=b1
390
391 __INITDATA
392
393default_setup_hook = 0 // Currently nothing needs to be done.
394
395 .weak xen_setup_hook
396
397 .global hypervisor_type
398hypervisor_type:
399 data8 PARAVIRT_HYPERVISOR_TYPE_DEFAULT
400
401 // must have the same order with PARAVIRT_HYPERVISOR_TYPE_xxx
402
403hypervisor_setup_hooks:
404 data8 default_setup_hook
405 data8 xen_setup_hook
406num_hypervisor_hooks = (. - hypervisor_setup_hooks) / 8
407 .previous
408
409#endif
410
370#ifdef CONFIG_SMP 411#ifdef CONFIG_SMP
371(isAP) br.call.sptk.many rp=start_secondary 412(isAP) br.call.sptk.many rp=start_secondary
372.ret0: 413.ret0: