Changeset ce031f0 in mainline for arch/mips32/src/mm/tlb.c

Timestamp:

2005-10-04T11:23:21Z (20 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

8e3f47b3

Parents:

1e2aecca

Message:

MIPS work.
Fix some name inconsistencies between cp0 functions' declarations and definitions.
Add and implement tlb_init_arch().
Add tlb_modified() exception handler.

Other architectures: add dummy tlb_init_arch().

File:

• arch/mips32/src/mm/tlb.c (modified) (3 diffs)

arch/mips32/src/mm/tlb.c

@@ -33 +33 @@
 #include <panic.h>
 #include <arch.h>
+#include <symtab.h>
 
-#include <symtab.h>
+void tlb_init_arch(void)
+{
+        int i;
+
+        cp0_pagemask_write(TLB_PAGE_MASK_16K);
+        cp0_entry_hi_write(0);
+        cp0_entry_lo0_write(0);
+        cp0_entry_lo1_write(0);
+
+        /*
+         * Invalidate all entries.
+         */
+        for (i = 0; i < TLB_SIZE; i++) {
+                cp0_index_write(0);
+                tlbwi();
+        }
+        
+        /*
+         * The kernel is going to make use of some wired
+         * entries (e.g. mapping kernel stacks).
+         */
+        cp0_wired_write(TLB_WIRED);
+}
 
 void tlb_refill(struct exception_regdump *pstate)
@@ -47 +70 @@
         if (s)
                 sym2 = s;
-        panic("%X: tlb_refill exception at %X(%s<-%s)\n", cp0_badvaddr_read(),
-              pstate->epc, symbol,sym2);
+        panic("%X: TLB Refill Exception at %X(%s<-%s)\n", cp0_badvaddr_read(),
+              pstate->epc, symbol, sym2);
 }
 
@@ -58 +81 @@
         if (s)
                 symbol = s;
-        panic("%X: TLB exception at %X(%s)\n", cp0_badvaddr_read(), 
+        panic("%X: TLB Invalid Exception at %X(%s)\n", cp0_badvaddr_read(),
               pstate->epc, symbol);
 }
+
+void tlb_modified(struct exception_regdump *pstate)
+{
+        char *symbol = "";
+
+        char *s = get_symtab_entry(pstate->epc);
+        if (s)
+                symbol = s;
+        panic("%X: TLB Modified Exception at %X(%s)\n", cp0_badvaddr_read(),
+              pstate->epc, symbol);
+}
+
 
 void tlb_invalidate(int asid)