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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>
This commit is contained in:
Nicholas Piggin 2018-11-16 07:04:05 +08:00 committed by Ley Foon Tan
parent e71c99fe8d
commit c6b1d363f8
1 changed files with 33 additions and 27 deletions
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60
arch/nios2/mm/tlb.c
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@ -62,19 +62,20 @@ void flush_tlb_one_pid(unsigned long addr, unsigned long mmu_pid)
tlbmisc = TLBMISC_RD | (way << TLBMISC_WAY_SHIFT); tlbmisc = TLBMISC_RD | (way << TLBMISC_WAY_SHIFT);
WRCTL(CTL_TLBMISC, tlbmisc); WRCTL(CTL_TLBMISC, tlbmisc);
pteaddr = RDCTL(CTL_PTEADDR); pteaddr = RDCTL(CTL_PTEADDR);
if (((pteaddr >> 2) & 0xfffff) != (addr >> PAGE_SHIFT))
continue;
tlbmisc = RDCTL(CTL_TLBMISC); tlbmisc = RDCTL(CTL_TLBMISC);
pid = (tlbmisc >> TLBMISC_PID_SHIFT) & TLBMISC_PID_MASK; pid = (tlbmisc >> TLBMISC_PID_SHIFT) & TLBMISC_PID_MASK;
if (((((pteaddr >> 2) & 0xfffff)) == (addr >> PAGE_SHIFT)) && if (pid != mmu_pid)
pid == mmu_pid) { continue;
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);
tlbmisc = TLBMISC_WE | (way << TLBMISC_WAY_SHIFT); WRCTL(CTL_TLBMISC, tlbmisc);
WRCTL(CTL_TLBMISC, tlbmisc); WRCTL(CTL_PTEADDR, pteaddr_invalid(addr));
WRCTL(CTL_TLBACC, 0); WRCTL(CTL_TLBACC, 0);
}
} }
WRCTL(CTL_TLBMISC, org_misc); WRCTL(CTL_TLBMISC, org_misc);
@ -113,18 +114,18 @@ static void flush_tlb_one(unsigned long addr)
tlbmisc = TLBMISC_RD | (way << TLBMISC_WAY_SHIFT); tlbmisc = TLBMISC_RD | (way << TLBMISC_WAY_SHIFT);
WRCTL(CTL_TLBMISC, tlbmisc); WRCTL(CTL_TLBMISC, tlbmisc);
pteaddr = RDCTL(CTL_PTEADDR); 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",
pr_debug("Flush entry by writing way=%dl pid=%ld\n", way, (pid_misc >> TLBMISC_PID_SHIFT));
way, (pid_misc >> TLBMISC_PID_SHIFT));
WRCTL(CTL_PTEADDR, pteaddr_invalid(addr)); tlbmisc = TLBMISC_WE | (way << TLBMISC_WAY_SHIFT);
tlbmisc = TLBMISC_WE | (way << TLBMISC_WAY_SHIFT); WRCTL(CTL_TLBMISC, tlbmisc);
WRCTL(CTL_TLBMISC, tlbmisc); WRCTL(CTL_PTEADDR, pteaddr_invalid(addr));
WRCTL(CTL_TLBACC, 0); WRCTL(CTL_TLBACC, 0);
}
} }
WRCTL(CTL_TLBMISC, org_misc); WRCTL(CTL_TLBMISC, org_misc);
@ -187,7 +188,7 @@ void dump_tlb(void)
dump_tlb_line(i); dump_tlb_line(i);
} }
void flush_tlb_pid(unsigned long pid) void flush_tlb_pid(unsigned long mmu_pid)
{ {
unsigned long addr = 0; unsigned long addr = 0;
unsigned int line; unsigned int line;
@ -202,17 +203,18 @@ void flush_tlb_pid(unsigned long pid)
for (way = 0; way < cpuinfo.tlb_num_ways; way++) { for (way = 0; way < cpuinfo.tlb_num_ways; way++) {
unsigned long tlbmisc; unsigned long tlbmisc;
unsigned long pid;
tlbmisc = TLBMISC_RD | (way << TLBMISC_WAY_SHIFT); tlbmisc = TLBMISC_RD | (way << TLBMISC_WAY_SHIFT);
WRCTL(CTL_TLBMISC, tlbmisc); WRCTL(CTL_TLBMISC, tlbmisc);
tlbmisc = RDCTL(CTL_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) tlbmisc = TLBMISC_WE | (way << TLBMISC_WAY_SHIFT);
== pid) { WRCTL(CTL_TLBMISC, tlbmisc);
tlbmisc = TLBMISC_WE | (way << TLBMISC_WAY_SHIFT); WRCTL(CTL_TLBACC, 0);
WRCTL(CTL_TLBMISC, tlbmisc);
WRCTL(CTL_TLBACC, 0);
}
} }
addr += PAGE_SIZE; addr += PAGE_SIZE;
@ -265,6 +267,10 @@ void flush_tlb_all(void)
void set_mmu_pid(unsigned long pid) void set_mmu_pid(unsigned long pid)
{ {
WRCTL(CTL_TLBMISC, (RDCTL(CTL_TLBMISC) & TLBMISC_WAY) | unsigned long tlbmisc;
((pid & TLBMISC_PID_MASK) << TLBMISC_PID_SHIFT));
tlbmisc = RDCTL(CTL_TLBMISC);
tlbmisc = (tlbmisc & TLBMISC_WAY);
tlbmisc |= (pid & TLBMISC_PID_MASK) << TLBMISC_PID_SHIFT;
WRCTL(CTL_TLBMISC, tlbmisc);
} }