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[IA64] abstract SAL_CALL wrapper to allow other firmware entry points

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SAL_CALL() always calls through the ia64_sal function pointer.  I am adding
new functionality that needs the same conventions as SAL_CALL (FP regs
saved/restored, sal_lock acquired, etc), but doesn't use the ia64_sal
function pointer.

This patch pulls the body of SAL_CALL out into a new "IA64_FW_CALL" that
takes care of these calling conventions, but allows the caller to specify
either ia64_sal or some other firmware entry point.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Bjorn Helgaas 2007-09-20 14:21:11 -06:00 committed by Tony Luck
parent 8e75ad8908
commit edbe7075d1
1 changed files with 9 additions and 6 deletions
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15
include/asm-ia64/sal.h
View file

@ -46,25 +46,28 @@
extern spinlock_t sal_lock;
/* SAL spec _requires_ eight args for each call. */
#define __SAL_CALL(result,a0,a1,a2,a3,a4,a5,a6,a7) \
result = (*ia64_sal)(a0,a1,a2,a3,a4,a5,a6,a7)
#define __IA64_FW_CALL(entry,result,a0,a1,a2,a3,a4,a5,a6,a7) \
result = (*entry)(a0,a1,a2,a3,a4,a5,a6,a7)
# define SAL_CALL(result,args...) do { \
# define IA64_FW_CALL(entry,result,args...) do { \
unsigned long __ia64_sc_flags; \
struct ia64_fpreg __ia64_sc_fr[6]; \
ia64_save_scratch_fpregs(__ia64_sc_fr); \
spin_lock_irqsave(&sal_lock, __ia64_sc_flags); \
__SAL_CALL(result, args); \
__IA64_FW_CALL(entry, result, args); \
spin_unlock_irqrestore(&sal_lock, __ia64_sc_flags); \
ia64_load_scratch_fpregs(__ia64_sc_fr); \
} while (0)
# define SAL_CALL(result,args...) \
IA64_FW_CALL(ia64_sal, result, args);
# define SAL_CALL_NOLOCK(result,args...) do { \
unsigned long __ia64_scn_flags; \
struct ia64_fpreg __ia64_scn_fr[6]; \
ia64_save_scratch_fpregs(__ia64_scn_fr); \
local_irq_save(__ia64_scn_flags); \
__SAL_CALL(result, args); \
__IA64_FW_CALL(ia64_sal, result, args); \
local_irq_restore(__ia64_scn_flags); \
ia64_load_scratch_fpregs(__ia64_scn_fr); \
} while (0)
@ -73,7 +76,7 @@ extern spinlock_t sal_lock;
struct ia64_fpreg __ia64_scs_fr[6]; \
ia64_save_scratch_fpregs(__ia64_scs_fr); \
preempt_disable(); \
__SAL_CALL(result, args); \
__IA64_FW_CALL(ia64_sal, result, args); \
preempt_enable(); \
ia64_load_scratch_fpregs(__ia64_scs_fr); \
} while (0)