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Diffstat (limited to 'arch/blackfin/kernel/cplb-nompu/cplbmgr.c')
-rw-r--r--arch/blackfin/kernel/cplb-nompu/cplbmgr.c54
1 files changed, 3 insertions, 51 deletions
diff --git a/arch/blackfin/kernel/cplb-nompu/cplbmgr.c b/arch/blackfin/kernel/cplb-nompu/cplbmgr.c
index 8cbb47c7b663..12b030842fdb 100644
--- a/arch/blackfin/kernel/cplb-nompu/cplbmgr.c
+++ b/arch/blackfin/kernel/cplb-nompu/cplbmgr.c
@@ -28,6 +28,7 @@
#include <asm/cplbinit.h>
#include <asm/cplb.h>
#include <asm/mmu_context.h>
+#include <asm/traps.h>
/*
* WARNING
@@ -100,28 +101,6 @@ static inline void write_icplb_data(int cpu, int idx, unsigned long data,
#endif
}
-/*
- * Given the contents of the status register, return the index of the
- * CPLB that caused the fault.
- */
-static inline int faulting_cplb_index(int status)
-{
- int signbits = __builtin_bfin_norm_fr1x32(status & 0xFFFF);
- return 30 - signbits;
-}
-
-/*
- * Given the contents of the status register and the DCPLB_DATA contents,
- * return true if a write access should be permitted.
- */
-static inline int write_permitted(int status, unsigned long data)
-{
- if (status & FAULT_USERSUPV)
- return !!(data & CPLB_SUPV_WR);
- else
- return !!(data & CPLB_USER_WR);
-}
-
/* Counters to implement round-robin replacement. */
static int icplb_rr_index[NR_CPUS] PDT_ATTR;
static int dcplb_rr_index[NR_CPUS] PDT_ATTR;
@@ -245,43 +224,16 @@ MGR_ATTR static int dcplb_miss(int cpu)
return CPLB_RELOADED;
}
-MGR_ATTR static noinline int dcplb_protection_fault(int cpu)
-{
- int status = bfin_read_DCPLB_STATUS();
-
- nr_dcplb_prot[cpu]++;
-
- if (likely(status & FAULT_RW)) {
- int idx = faulting_cplb_index(status);
- unsigned long regaddr = DCPLB_DATA0 + idx * 4;
- unsigned long data = bfin_read32(regaddr);
-
- /* Check if fault is to dirty a clean page */
- if (!(data & CPLB_WT) && !(data & CPLB_DIRTY) &&
- write_permitted(status, data)) {
-
- dcplb_tbl[cpu][idx].data = data;
- bfin_write32(regaddr, data);
- return CPLB_RELOADED;
- }
- }
-
- return CPLB_PROT_VIOL;
-}
-
MGR_ATTR int cplb_hdr(int seqstat, struct pt_regs *regs)
{
int cause = seqstat & 0x3f;
unsigned int cpu = smp_processor_id();
switch (cause) {
- case 0x2C:
+ case VEC_CPLB_I_M:
return icplb_miss(cpu);
- case 0x26:
+ case VEC_CPLB_M:
return dcplb_miss(cpu);
default:
- if (unlikely(cause == 0x23))
- return dcplb_protection_fault(cpu);
-
return CPLB_UNKNOWN_ERR;
}
}