MIPS: Netlogic: Support for XLR/XLS Fast Message Network

On XLR/XLS, the cpu cores communicate with fast on-chip devices
(e.g. network accelerator, security engine etc.) using the Fast
Messaging Network(FMN). The FMN queues and credits needs to be
configured and intialized before it can be used.

The co-processor 2 on XLR/XLS CPU cores has registers for FMN access,
and the XLR/XLS has custom instructions for sending and loading
messages.  The FMN can deliver also per-cpu interrupts when messages
are available at the CPU.

This patch adds FMN initialization, adds interrupt setup and handling,
and also provides support for sending and receiving FMN messages.

Signed-off-by: Ganesan Ramalingam <ganesanr@broadcom.com>
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/4468
Signed-off-by: John Crispin <blogic@openwrt.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/mips/netlogic/xlr/setup.c b/arch/mips/netlogic/xlr/setup.c
index 696d4248b92f..4e7f49d3d5a8 100644
--- a/arch/mips/netlogic/xlr/setup.c
+++ b/arch/mips/netlogic/xlr/setup.c
@@ -49,6 +49,7 @@
 #include <asm/netlogic/xlr/iomap.h>
 #include <asm/netlogic/xlr/pic.h>
 #include <asm/netlogic/xlr/gpio.h>
+#include <asm/netlogic/xlr/fmn.h>
 
 uint64_t nlm_io_base = DEFAULT_NETLOGIC_IO_BASE;
 struct psb_info nlm_prom_info;
@@ -111,6 +112,12 @@ void __init prom_free_prom_memory(void)
         /* Nothing yet */
 }
 
+void nlm_percpu_init(int hwcpuid)
+{
+        if (hwcpuid % 4 == 0)
+                xlr_percpu_fmn_init();
+}
+
 static void __init build_arcs_cmdline(int *argv)
 {
         int i, remain, len;
@@ -208,4 +215,6 @@ void __init prom_init(void)
         nlm_wakeup_secondary_cpus();
         register_smp_ops(&nlm_smp_ops);
 #endif
+        xlr_board_info_setup();
+        xlr_percpu_fmn_init();
 }