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| author | Nicholas Piggin <npiggin@gmail.com> | 2018-11-16 00:04:05 +0100 |
|---|---|---|
| committer | Ley Foon Tan <ley.foon.tan@intel.com> | 2019-03-06 22:29:35 +0100 |
| commit | c6b1d363f883996e62bdb8655e472890d7dfd7ca (patch) | |
| tree | 338e9446a8f2fe7f0e5f82080de5f9a6079a11ee /arch/nios2 | |
| parent | nios2: flush_tlb_mm flush only the pid (diff) | |
| download | linux-c6b1d363f883996e62bdb8655e472890d7dfd7ca.tar.xz linux-c6b1d363f883996e62bdb8655e472890d7dfd7ca.zip | |
nios2: improve readability of tlb functions
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Diffstat (limited to 'arch/nios2')
| -rw-r--r-- | arch/nios2/mm/tlb.c | 60 |
1 files changed, 33 insertions, 27 deletions
diff --git a/arch/nios2/mm/tlb.c b/arch/nios2/mm/tlb.c index e87304e1fc3f..58c16d35f501 100644 --- a/arch/nios2/mm/tlb.c +++ b/arch/nios2/mm/tlb.c @@ -62,19 +62,20 @@ void flush_tlb_one_pid(unsigned long addr, unsigned long mmu_pid) tlbmisc = TLBMISC_RD | (way << TLBMISC_WAY_SHIFT); WRCTL(CTL_TLBMISC, tlbmisc); + pteaddr = RDCTL(CTL_PTEADDR); + if (((pteaddr >> 2) & 0xfffff) != (addr >> PAGE_SHIFT)) + continue; + tlbmisc = RDCTL(CTL_TLBMISC); pid = (tlbmisc >> TLBMISC_PID_SHIFT) & TLBMISC_PID_MASK; - if (((((pteaddr >> 2) & 0xfffff)) == (addr >> PAGE_SHIFT)) && - pid == mmu_pid) { - pr_debug("Flush entry by writing way=%dl pid=%ld\n", - way, (pid_misc >> TLBMISC_PID_SHIFT)); + if (pid != mmu_pid) + continue; - WRCTL(CTL_PTEADDR, pteaddr_invalid(addr)); - tlbmisc = TLBMISC_WE | (way << TLBMISC_WAY_SHIFT); - WRCTL(CTL_TLBMISC, tlbmisc); - WRCTL(CTL_TLBACC, 0); - } + tlbmisc = TLBMISC_WE | (way << TLBMISC_WAY_SHIFT); + WRCTL(CTL_TLBMISC, tlbmisc); + WRCTL(CTL_PTEADDR, pteaddr_invalid(addr)); + WRCTL(CTL_TLBACC, 0); } WRCTL(CTL_TLBMISC, org_misc); @@ -113,18 +114,18 @@ static void flush_tlb_one(unsigned long addr) tlbmisc = TLBMISC_RD | (way << TLBMISC_WAY_SHIFT); WRCTL(CTL_TLBMISC, tlbmisc); + pteaddr = RDCTL(CTL_PTEADDR); - tlbmisc = RDCTL(CTL_TLBMISC); + if (((pteaddr >> 2) & 0xfffff) != (addr >> PAGE_SHIFT)) + continue; - if ((((pteaddr >> 2) & 0xfffff)) == (addr >> PAGE_SHIFT)) { - pr_debug("Flush entry by writing way=%dl pid=%ld\n", - way, (pid_misc >> TLBMISC_PID_SHIFT)); + pr_debug("Flush entry by writing way=%dl pid=%ld\n", + way, (pid_misc >> TLBMISC_PID_SHIFT)); - WRCTL(CTL_PTEADDR, pteaddr_invalid(addr)); - tlbmisc = TLBMISC_WE | (way << TLBMISC_WAY_SHIFT); - WRCTL(CTL_TLBMISC, tlbmisc); - WRCTL(CTL_TLBACC, 0); - } + tlbmisc = TLBMISC_WE | (way << TLBMISC_WAY_SHIFT); + WRCTL(CTL_TLBMISC, tlbmisc); + WRCTL(CTL_PTEADDR, pteaddr_invalid(addr)); + WRCTL(CTL_TLBACC, 0); } WRCTL(CTL_TLBMISC, org_misc); @@ -187,7 +188,7 @@ void dump_tlb(void) dump_tlb_line(i); } -void flush_tlb_pid(unsigned long pid) +void flush_tlb_pid(unsigned long mmu_pid) { unsigned long addr = 0; unsigned int line; @@ -202,17 +203,18 @@ void flush_tlb_pid(unsigned long pid) for (way = 0; way < cpuinfo.tlb_num_ways; way++) { unsigned long tlbmisc; + unsigned long pid; tlbmisc = TLBMISC_RD | (way << TLBMISC_WAY_SHIFT); WRCTL(CTL_TLBMISC, tlbmisc); tlbmisc = RDCTL(CTL_TLBMISC); + pid = (tlbmisc >> TLBMISC_PID_SHIFT) & TLBMISC_PID_MASK; + if (pid != mmu_pid) + continue; - if (((tlbmisc>>TLBMISC_PID_SHIFT) & TLBMISC_PID_MASK) - == pid) { - tlbmisc = TLBMISC_WE | (way << TLBMISC_WAY_SHIFT); - WRCTL(CTL_TLBMISC, tlbmisc); - WRCTL(CTL_TLBACC, 0); - } + tlbmisc = TLBMISC_WE | (way << TLBMISC_WAY_SHIFT); + WRCTL(CTL_TLBMISC, tlbmisc); + WRCTL(CTL_TLBACC, 0); } addr += PAGE_SIZE; @@ -265,6 +267,10 @@ void flush_tlb_all(void) void set_mmu_pid(unsigned long pid) { - WRCTL(CTL_TLBMISC, (RDCTL(CTL_TLBMISC) & TLBMISC_WAY) | - ((pid & TLBMISC_PID_MASK) << TLBMISC_PID_SHIFT)); + unsigned long tlbmisc; + + tlbmisc = RDCTL(CTL_TLBMISC); + tlbmisc = (tlbmisc & TLBMISC_WAY); + tlbmisc |= (pid & TLBMISC_PID_MASK) << TLBMISC_PID_SHIFT; + WRCTL(CTL_TLBMISC, tlbmisc); } |