Changeset e386cbf in mainline for kernel/arch/sparc64/src/sparc64.c

Timestamp:

2006-08-01T15:58:32Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

e12ccc5

Parents:

b3e8c90

Message:

sparc64 work.
Dump take_over_tlb_and_tt() and add its assembly language replacement.

File:

• kernel/arch/sparc64/src/sparc64.c (modified) (1 diff)

kernel/arch/sparc64/src/sparc64.c

@@ -92 +92 @@
 }
 
-/** Take over TLB and trap table.
- *
- * Initialize ITLB and DTLB and switch to kernel
- * trap table.
- *
- * First, demap context 0 and install the
- * global 4M locked kernel mapping.
- *
- * Second, prepare a temporary IMMU mapping in
- * context 1, switch to it, demap context 0,
- * install the global 4M locked kernel mapping
- * in context 0 and switch back to context 0.
- *
- * @param base Base address that will be hardwired in both TLBs.
- */
-void take_over_tlb_and_tt(uintptr_t base)
-{
-        tlb_tag_access_reg_t tag;
-        tlb_data_t data;
-        frame_address_t fr;
-        page_address_t pg;
-
-        /*
-         * Switch to the kernel trap table.
-         */
-        trap_switch_trap_table();
-
-        fr.address = base;
-        pg.address = base;
-
-        /*
-         * We do identity mapping of 4M-page at 4M.
-         */
-        tag.value = 0;
-        tag.context = 0;
-        tag.vpn = pg.vpn;
-
-        data.value = 0;
-        data.v = true;
-        data.size = PAGESIZE_4M;
-        data.pfn = fr.pfn;
-        data.l = true;
-        data.cp = 1;
-        data.cv = 0;
-        data.p = true;
-        data.w = true;
-        data.g = true;
-
-        /*
-         * Straightforwardly demap DMUU context 0,
-         * and replace it with the locked kernel mapping.
-         */
-        dtlb_demap(TLB_DEMAP_CONTEXT, TLB_DEMAP_NUCLEUS, 0);
-        dtlb_tag_access_write(tag.value);
-        dtlb_data_in_write(data.value);
-
-        /*
-         * Install kernel code mapping in context 1
-         * and switch to it.
-         */
-        tag.context = 1;
-        data.g = false;
-        itlb_tag_access_write(tag.value);
-        itlb_data_in_write(data.value);
-        mmu_primary_context_write(1);
-        
-        /*
-         * Demap old context 0.
-         */
-        itlb_demap(TLB_DEMAP_CONTEXT, TLB_DEMAP_NUCLEUS, 0);
-        
-        /*
-         * Install the locked kernel mapping in context 0
-         * and switch to it.
-         */
-        tag.context = 0;
-        data.g = true;
-        itlb_tag_access_write(tag.value);
-        itlb_data_in_write(data.value);
-        mmu_primary_context_write(0);
-}
-
 /** @}
  */