powerpc/44x/fsp2: Interrupt handling setup

* clear out any possible plb6 errors
* board interrupt handling setup within l2 reg set
* fsp2 parity error setup

All those points are needed for correct interrupt
handling on board level including error handling report.

Reviewed-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Ivan Mikhaylov <ivan@de.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/platforms/44x/fsp2.c b/arch/powerpc/platforms/44x/fsp2.c
index 92e9804..baed409 100644 (file)
--- a/arch/powerpc/platforms/44x/fsp2.c
+++ b/arch/powerpc/platforms/44x/fsp2.c
@@ -27,6 +27,8 @@
 #include <asm/time.h>
 #include <asm/uic.h>
 #include <asm/ppc4xx.h>
+#include <asm/dcr.h>
+#include "fsp2.h"
 
 static __initdata struct of_device_id fsp2_of_bus[] = {
        { .compatible = "ibm,plb4", },
@@ -44,10 +46,45 @@ machine_device_initcall(fsp2, fsp2_device_probe);
 
 static int __init fsp2_probe(void)
 {
+       u32 val;
        unsigned long root = of_get_flat_dt_root();
 
        if (!of_flat_dt_is_compatible(root, "ibm,fsp2"))
                return 0;
+
+       /* Clear BC_ERR and mask snoopable request plb errors. */
+       val = mfdcr(DCRN_PLB6_CR0);
+       val |= 0x20000000;
+       mtdcr(DCRN_PLB6_BASE, val);
+       mtdcr(DCRN_PLB6_HD, 0xffff0000);
+       mtdcr(DCRN_PLB6_SHD, 0xffff0000);
+
+       /* L2 machine checks */
+       mtl2(L2PLBMCKEN0, 0xffffffff);
+       mtl2(L2PLBMCKEN1, 0x0000ffff);
+       mtl2(L2ARRMCKEN0, 0xffffffff);
+       mtl2(L2ARRMCKEN1, 0xffffffff);
+       mtl2(L2ARRMCKEN2, 0xfffff000);
+       mtl2(L2CPUMCKEN,  0xffffffff);
+       mtl2(L2RACMCKEN0, 0xffffffff);
+       mtl2(L2WACMCKEN0, 0xffffffff);
+       mtl2(L2WACMCKEN1, 0xffffffff);
+       mtl2(L2WACMCKEN2, 0xffffffff);
+       mtl2(L2WDFMCKEN,  0xffffffff);
+
+       /* L2 interrupts */
+       mtl2(L2PLBINTEN1, 0xffff0000);
+
+       /*
+        * At a global level, enable all L2 machine checks and interrupts
+        * reported by the L2 subsystems, except for the external machine check
+        * input (UIC0.1).
+        */
+       mtl2(L2MCKEN, 0x000007ff);
+       mtl2(L2INTEN, 0x000004ff);
+
+       /* Enable FSP-2 configuration logic parity errors */
+       mtdcr(DCRN_CONF_EIR_RS, 0x80000000);
        return 1;
 }