diff options
Diffstat (limited to 'arch/mips64/kernel/r4k_tlb.S')
| -rw-r--r-- | arch/mips64/kernel/r4k_tlb.S | 59 |
1 files changed, 54 insertions, 5 deletions
diff --git a/arch/mips64/kernel/r4k_tlb.S b/arch/mips64/kernel/r4k_tlb.S index 2baa35ca1..54c4b934b 100644 --- a/arch/mips64/kernel/r4k_tlb.S +++ b/arch/mips64/kernel/r4k_tlb.S @@ -1,4 +1,4 @@ -/* $Id: r4k_tlb.S,v 1.1 2000/05/25 19:33:16 ulfc Exp $ +/* $Id: r4k_tlb.S,v 1.2 2000/06/13 23:48:20 kanoj Exp $ * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive @@ -33,13 +33,14 @@ #endif dmfc0 \tmp, CP0_BADVADDR ld \ptr, (\ptr) - dsrl \tmp, 28 # get pgd offset - andi \tmp, 0x1ff8 + bltz \tmp, kaddr + dsrl \tmp, (PGDIR_SHIFT-3) # get pgd offset in bytes + andi \tmp, ((PTRS_PER_PGD - 1)<<3) daddu \ptr, \tmp # add in pgd offset dmfc0 \tmp, CP0_BADVADDR ld \ptr, (\ptr) # get pmd pointer - dsrl \tmp, 18 # get pmd offset - andi \tmp, 0x1ff8 + dsrl \tmp, (PMD_SHIFT-3) # get pmd offset in bytes + andi \tmp, ((PTRS_PER_PMD - 1)<<3) daddu \ptr, \tmp # add in pmd offset dmfc0 \tmp, CP0_XCONTEXT ld \ptr, (\ptr) # get pte pointer @@ -82,3 +83,51 @@ FEXPORT(except_vec1_r10k) nop tlbwr eret +kaddr: + dla k0, handle_vmalloc_address # MAPPED kernel needs this + jr k0 + nop + + .align 5 +FEXPORT(handle_vmalloc_address) + .set noat + /* + * First, determine that the address is in/above vmalloc range. + */ + dmfc0 k0, CP0_BADVADDR + dli k1, VMALLOC_START + sltu k1, k0, k1 + bne k1, zero, not_vmalloc + dli k1, VMALLOC_START + + /* + * Now find offset into kptbl. + */ + dsubu k0, k0, k1 + dla k1, kptbl + dsrl k0, (PAGE_SHIFT+1) # get vpn2 + dsll k0, 4 # byte offset of pte + daddu k1, k1, k0 + + /* + * Determine that fault address is within vmalloc range. + */ + dla k0, ekptbl + sltu k0, k1, k0 + beq k0, zero, not_vmalloc + + /* + * Load cp0 registers. + */ + ld k0, 0(k1) # get even pte + ld k1, 8(k1) # get odd pte +1: + PTE_RELOAD k0 k1 + nop + tlbwr + eret +not_vmalloc: + daddu k0, zero, zero + daddu k1, zero, zero + j 1b + nop |