ibm_newemac: MAL support for PowerPC 405EZ

The PowerPC 405EZ SoC has some differences in the interrupt layout and
handling for the MAL.  The SERR, TXDE, and RXDE interrupts are OR'd into
a single interrupt.  Also, due to the possibility for interrupt coalescing,
the TXEOB and RXEOB interrupts require an interrupt bit to be cleared in
the ICINTSTAT SDR.

This sets the proper MAL feature bits for 405EZ boards, and adds a common
shared handler for SERR, TXDE, and RXDE.  The defines for the ICINTSTAT DCR
are added to the proper header file as well.

This has been adapted from code originally written by Stefan Roese.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/dcr-regs.h b/arch/powerpc/include/asm/dcr-regs.h
index 29b0ecef980a..7b833ff9c14f 100644
--- a/arch/powerpc/include/asm/dcr-regs.h
+++ b/arch/powerpc/include/asm/dcr-regs.h
@@ -68,6 +68,13 @@
 #define SDR0_UART3              0x0123
 #define SDR0_CUST0              0x4000
 
+/* SDR for 405EZ */
+#define DCRN_SDR_ICINTSTAT      0x4510
+#define ICINTSTAT_ICRX  0x80000000
+#define ICINTSTAT_ICTX0 0x40000000
+#define ICINTSTAT_ICTX1 0x20000000
+#define ICINTSTAT_ICTX  0x60000000
+
 /*
  * All those DCR register addresses are offsets from the base address
  * for the SRAM0 controller (e.g. 0x20 on 440GX). The base address is