]> www.pilppa.org Git - linux-2.6-omap-h63xx.git/blobdiff - arch/powerpc/boot/44x.c
[POWERPC] Derive ebc ranges property from EBC registers
[linux-2.6-omap-h63xx.git] / arch / powerpc / boot / 44x.c
index d51377d9024f7807b0ca2dac0b52d5427b890ebd..9f64e840bef628d062bdef0327afa8b9692b7420 100644 (file)
@@ -38,3 +38,48 @@ void ibm44x_fixup_memsize(void)
 
        dt_fixup_memory(0, memsize);
 }
+
+#define SPRN_DBCR0             0x134
+#define   DBCR0_RST_SYSTEM     0x30000000
+
+void ibm44x_dbcr_reset(void)
+{
+       unsigned long tmp;
+
+       asm volatile (
+               "mfspr  %0,%1\n"
+               "oris   %0,%0,%2@h\n"
+               "mtspr  %1,%0"
+               : "=&r"(tmp) : "i"(SPRN_DBCR0), "i"(DBCR0_RST_SYSTEM)
+               );
+
+}
+
+/* Read 4xx EBC bus bridge registers to get mappings of the peripheral
+ * banks into the OPB address space */
+void ibm4xx_fixup_ebc_ranges(const char *ebc)
+{
+       void *devp;
+       u32 bxcr;
+       u32 ranges[EBC_NUM_BANKS*4];
+       u32 *p = ranges;
+       int i;
+
+       for (i = 0; i < EBC_NUM_BANKS; i++) {
+               mtdcr(DCRN_EBC0_CFGADDR, EBC_BXCR(i));
+               bxcr = mfdcr(DCRN_EBC0_CFGDATA);
+
+               if ((bxcr & EBC_BXCR_BU) != EBC_BXCR_BU_OFF) {
+                       *p++ = i;
+                       *p++ = 0;
+                       *p++ = bxcr & EBC_BXCR_BAS;
+                       *p++ = EBC_BXCR_BANK_SIZE(bxcr);
+               }
+       }
+
+       devp = finddevice(ebc);
+       if (! devp)
+               fatal("Couldn't locate EBC node %s\n\r", ebc);
+
+       setprop(devp, "ranges", ranges, (p - ranges) * sizeof(u32));
+}