[PATCH] powerpc: Make ppc_md.set_dabr non 64-bit specific

Define ppc_md.set_dabr for both 32 + 64 bit. Cleanup the implementation for
pSeries also, it was needlessly complex. Now we just do two firmware tests at
setup time, and use one of two functions, rather than using one function and
testing on every call.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

2 files changed, 10 insertions, 17 deletions

diff --git a/arch/powerpc/platforms/pseries/plpar_wrappers.h b/arch/powerpc/platforms/pseries/plpar_wrappers.h
index 382f8c5b0e7..3bd1b3e0600 100644
--- a/arch/powerpc/platforms/pseries/plpar_wrappers.h
+++ b/arch/powerpc/platforms/pseries/plpar_wrappers.h
@@ -107,14 +107,4 @@ static inline long plpar_put_term_char(unsigned long termno, unsigned long len,
 			lbuf[1]);
 }
 
-static inline long plpar_set_xdabr(unsigned long address, unsigned long flags)
-{
-	return plpar_hcall_norets(H_SET_XDABR, address, flags);
-}
-
-static inline long plpar_set_dabr(unsigned long val)
-{
-	return plpar_hcall_norets(H_SET_DABR, val);
-}
-
 #endif /* _PSERIES_PLPAR_WRAPPERS_H */
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 934d7006353..e78c3936884 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -354,14 +354,15 @@ static void pSeries_mach_cpu_die(void)
 
 static int pseries_set_dabr(unsigned long dabr)
 {
-	if (firmware_has_feature(FW_FEATURE_XDABR)) {
-		/* We want to catch accesses from kernel and userspace */
-		return plpar_set_xdabr(dabr, H_DABRX_KERNEL | H_DABRX_USER);
-	}
-
-	return plpar_set_dabr(dabr);
+	return plpar_hcall_norets(H_SET_DABR, dabr);
 }
 
+static int pseries_set_xdabr(unsigned long dabr)
+{
+	/* We want to catch accesses from kernel and userspace */
+	return plpar_hcall_norets(H_SET_XDABR, dabr,
+			H_DABRX_KERNEL | H_DABRX_USER);
+}
 
 /*
  * Early initialization.  Relocation is on but do not reference unbolted pages
@@ -397,8 +398,10 @@ static void __init pSeries_init_early(void)
 		DBG("Hello World !\n");
 	}
 
-	if (firmware_has_feature(FW_FEATURE_XDABR | FW_FEATURE_DABR))
+	if (firmware_has_feature(FW_FEATURE_DABR))
 		ppc_md.set_dabr = pseries_set_dabr;
+	else if (firmware_has_feature(FW_FEATURE_XDABR))
+		ppc_md.set_dabr = pseries_set_xdabr;
 
 	iommu_init_early_pSeries();