Import of Linux/MIPS 1.3.0

1 files changed, 183 insertions, 0 deletions

diff --git a/arch/sparc/kernel/idprom.c b/arch/sparc/kernel/idprom.c
new file mode 100644
index 000000000..c12f7467b
--- /dev/null
+++ b/arch/sparc/kernel/idprom.c
@@ -0,0 +1,183 @@
+/* idprom.c: Routines to load the idprom into kernel addresses and
+ *           interpret the data contained within.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#include <linux/kernel.h>
+
+#include <asm/types.h>
+#include <asm/openprom.h>
+#include <asm/idprom.h>
+
+struct idp_struct idprom;
+extern int num_segmaps, num_contexts;
+
+void get_idprom(void)
+{
+  char* idp_addr;
+  char* knl_idp_addr;
+  int i;
+
+  idp_addr = (char *)IDPROM_ADDR;
+  knl_idp_addr = (char *) &idprom;
+
+  for(i = 0; i<IDPROM_SIZE; i++)
+      *knl_idp_addr++ = *idp_addr++;
+
+  return;
+}
+
+/* find_vac_size() returns the number of bytes in the VAC (virtual
+ * address cache) on this machine.
+ */
+
+int
+find_vac_size(void)
+{
+  int vac_prop_len;
+  int vacsize = 0;
+  int node_root;
+
+  node_root = (*(romvec->pv_nodeops->no_nextnode))(0);
+
+  vac_prop_len = (*(romvec->pv_nodeops->no_proplen))(node_root, "vac-size");
+
+  if(vac_prop_len != -1)
+    {
+      (*(romvec->pv_nodeops->no_getprop))(node_root, "vac-size", (char *) &vacsize);
+      return vacsize;
+    }
+  else
+    {
+
+  /* The prom node functions can't help, do it via idprom struct */
+      switch(idprom.id_machtype)
+	{
+	case 0x51:
+	case 0x52:
+	case 0x53:
+	case 0x54:
+	case 0x55:
+	case 0x56:
+	case 0x57:
+	  return 65536;
+	default:
+	  return -1;
+	}
+    };
+}
+
+/* find_vac_linesize() returns the size in bytes of the VAC linesize */ 
+
+int
+find_vac_linesize(void)
+{
+  int vac_prop_len;
+  int vaclinesize = 0;
+  int node_root;
+
+  node_root = (*(romvec->pv_nodeops->no_nextnode))(0);
+
+  vac_prop_len = (*(romvec->pv_nodeops->no_proplen))(node_root, "vac-linesize");
+
+  if(vac_prop_len != -1)
+    {
+      (*(romvec->pv_nodeops->no_getprop))(node_root, "vac-linesize",
+				      (char *) &vaclinesize);
+      return vaclinesize;
+    }
+  else
+    {
+
+  /* The prom node functions can't help, do it via idprom struct */
+      switch(idprom.id_machtype)
+	{
+	case 0x51:
+	case 0x52:
+	case 0x53:
+	case 0x54:
+	  return 16;
+	case 0x55:
+	case 0x56:
+	case 0x57:
+	  return 32;
+	default:
+	  return -1;
+	}
+    };
+}
+
+int
+find_vac_hwflushes(void)
+{
+  register int len, node_root;
+  int tmp1, tmp2;
+
+  node_root = (*(romvec->pv_nodeops->no_nextnode))(0);
+
+  len = (*(romvec->pv_nodeops->no_proplen))(node_root, "vac_hwflush");
+
+#ifdef DEBUG_IDPROM
+  printf("DEBUG: find_vac_hwflushes: proplen vac_hwflush=0x%x\n", len);
+#endif
+
+  /* Sun 4/75 has typo in prom_node, it's a dash instead of an underscore
+   * in the property name. :-(
+   */
+  len |= (*(romvec->pv_nodeops->no_proplen))(node_root, "vac-hwflush");
+
+#ifdef DEBUG_IDPROM
+  printf("DEBUG: find_vac_hwflushes: proplen vac-hwflush=0x%x\n", len);
+#endif
+
+  len = (*(romvec->pv_nodeops->no_getprop))(node_root,"vac_hwflush", 
+					    (char *) &tmp1);
+  if(len != 4) tmp1=0;
+
+  len = (*(romvec->pv_nodeops->no_getprop))(node_root, "vac-hwflush",
+					    (char *) &tmp2);
+  if(len != 4) tmp2=0;
+
+
+  return (tmp1|tmp2);
+}
+
+void
+find_mmu_num_segmaps(void)
+{
+  register int root_node, len;
+
+  root_node = (*(romvec->pv_nodeops->no_nextnode))(0);
+
+  len = (*(romvec->pv_nodeops->no_getprop))(root_node, "mmu-npmg", 
+					    (char *) &num_segmaps);
+
+#ifdef DEBUG_MMU
+  printf("find_mmu_num_segmaps: property length = %d\n", len);
+#endif
+
+  if(len != 4) num_segmaps = 128;
+
+  return;
+}
+
+void
+find_mmu_num_contexts(void)
+{
+  register int root_node, len;
+
+  root_node = (*(romvec->pv_nodeops->no_nextnode))(0);
+
+  len = (*(romvec->pv_nodeops->no_getprop))(root_node, "mmu-nctx", 
+					    (char *) &num_contexts);
+
+#ifdef DEBUG_MMU
+  printf("find_mmu_num_contexts: property length = %d\n", len);
+#endif
+
+  if(len != 4) num_contexts = 8;
+
+  return;
+}
+