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authorMichael Neuling <mikey@neuling.org>2012-12-20 14:06:45 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-01-10 17:01:47 +1100
commitbf99de36e48678c61adb697496e0364c610bbbfc (patch)
tree3598bcc7ecb662054703a98929d794a542c5c834 /arch/powerpc/platforms/pseries/setup.c
parent9422de3e953d0e60eb95f5430a9dd803eec1c6d7 (diff)
downloadlinaro-lsk-bf99de36e48678c61adb697496e0364c610bbbfc.tar.gz
powerpc: Add the DAWR support to the set_break()
This adds DAWR supoprt to the set_break(). It does both bare metal and PAPR versions of setting the DAWR. There is still some work we can do to make full use of the watchpoint but that will come later. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms/pseries/setup.c')
-rw-r--r--arch/powerpc/platforms/pseries/setup.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 1890730354b..b1f60d162bb 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -65,6 +65,7 @@
#include <asm/smp.h>
#include <asm/firmware.h>
#include <asm/eeh.h>
+#include <asm/reg.h>
#include "plpar_wrappers.h"
#include "pseries.h"
@@ -500,6 +501,14 @@ static int pseries_set_xdabr(unsigned long dabr, unsigned long dabrx)
return plpar_hcall_norets(H_SET_XDABR, dabr, dabrx);
}
+static int pseries_set_dawr(unsigned long dawr, unsigned long dawrx)
+{
+ /* PAPR says we can't set HYP */
+ dawrx &= ~DAWRX_HYP;
+
+ return plapr_set_watchpoint0(dawr, dawrx);
+}
+
#define CMO_CHARACTERISTICS_TOKEN 44
#define CMO_MAXLENGTH 1026
@@ -606,6 +615,9 @@ static void __init pSeries_init_early(void)
else if (firmware_has_feature(FW_FEATURE_DABR))
ppc_md.set_dabr = pseries_set_dabr;
+ if (firmware_has_feature(FW_FEATURE_SET_MODE))
+ ppc_md.set_dawr = pseries_set_dawr;
+
pSeries_cmo_feature_init();
iommu_init_early_pSeries();