1 files changed, 35 insertions, 0 deletions

diff --git a/arch/mips/netlogic/xlp/nlm_hal.c b/arch/mips/netlogic/xlp/nlm_hal.c
index 87560e4db35f..6f2c21008ddb 100644
--- a/arch/mips/netlogic/xlp/nlm_hal.c
+++ b/arch/mips/netlogic/xlp/nlm_hal.c
@@ -44,6 +44,7 @@
 #include <asm/netlogic/haldefs.h>
 #include <asm/netlogic/xlp-hal/iomap.h>
 #include <asm/netlogic/xlp-hal/xlp.h>
+#include <asm/netlogic/xlp-hal/bridge.h>
 #include <asm/netlogic/xlp-hal/pic.h>
 #include <asm/netlogic/xlp-hal/sys.h>
 
@@ -142,3 +143,37 @@ unsigned int nlm_get_cpu_frequency(void)
 {
         return nlm_get_core_frequency(0, 0);
 }
+
+/*
+ * Fills upto 8 pairs of entries containing the DRAM map of a node
+ * if n < 0, get dram map for all nodes
+ */
+int xlp_get_dram_map(int n, uint64_t *dram_map)
+{
+        uint64_t bridgebase, base, lim;
+        uint32_t val;
+        int i, node, rv;
+
+        /* Look only at mapping on Node 0, we don't handle crazy configs */
+        bridgebase = nlm_get_bridge_regbase(0);
+        rv = 0;
+        for (i = 0; i < 8; i++) {
+                val = nlm_read_bridge_reg(bridgebase,
+                                        BRIDGE_DRAM_NODE_TRANSLN(i));
+                node = (val >> 1) & 0x3;
+                if (n >= 0 && n != node)
+                        continue;
+                val = nlm_read_bridge_reg(bridgebase, BRIDGE_DRAM_BAR(i));
+                val = (val >>  12) & 0xfffff;
+                base = (uint64_t) val << 20;
+                val = nlm_read_bridge_reg(bridgebase, BRIDGE_DRAM_LIMIT(i));
+                val = (val >>  12) & 0xfffff;
+                if (val == 0)   /* BAR not used */
+                        continue;
+                lim = ((uint64_t)val + 1) << 20;
+                dram_map[rv] = base;
+                dram_map[rv + 1] = lim;
+                rv += 2;
+        }
+        return rv;
+}