aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--arch/parisc/kernel/cache.c33
-rw-r--r--arch/parisc/kernel/pacache.S216
2 files changed, 229 insertions, 20 deletions
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index 56dc9791ee23..804880efa11e 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -36,6 +36,7 @@ EXPORT_SYMBOL(dcache_stride);
void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
EXPORT_SYMBOL(flush_dcache_page_asm);
+void purge_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
void flush_icache_page_asm(unsigned long phys_addr, unsigned long vaddr);
@@ -303,6 +304,17 @@ __flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr,
preempt_enable();
}
+static inline void
+__purge_cache_page(struct vm_area_struct *vma, unsigned long vmaddr,
+ unsigned long physaddr)
+{
+ preempt_disable();
+ purge_dcache_page_asm(physaddr, vmaddr);
+ if (vma->vm_flags & VM_EXEC)
+ flush_icache_page_asm(physaddr, vmaddr);
+ preempt_enable();
+}
+
void flush_dcache_page(struct page *page)
{
struct address_space *mapping = page_mapping_file(page);
@@ -563,9 +575,12 @@ void flush_cache_mm(struct mm_struct *mm)
pfn = pte_pfn(*ptep);
if (!pfn_valid(pfn))
continue;
- if (unlikely(mm->context))
+ if (unlikely(mm->context)) {
flush_tlb_page(vma, addr);
- __flush_cache_page(vma, addr, PFN_PHYS(pfn));
+ __flush_cache_page(vma, addr, PFN_PHYS(pfn));
+ } else {
+ __purge_cache_page(vma, addr, PFN_PHYS(pfn));
+ }
}
}
}
@@ -600,9 +615,12 @@ void flush_cache_range(struct vm_area_struct *vma,
continue;
pfn = pte_pfn(*ptep);
if (pfn_valid(pfn)) {
- if (unlikely(vma->vm_mm->context))
+ if (unlikely(vma->vm_mm->context)) {
flush_tlb_page(vma, addr);
- __flush_cache_page(vma, addr, PFN_PHYS(pfn));
+ __flush_cache_page(vma, addr, PFN_PHYS(pfn));
+ } else {
+ __purge_cache_page(vma, addr, PFN_PHYS(pfn));
+ }
}
}
}
@@ -611,9 +629,12 @@ void
flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn)
{
if (pfn_valid(pfn)) {
- if (likely(vma->vm_mm->context))
+ if (likely(vma->vm_mm->context)) {
flush_tlb_page(vma, vmaddr);
- __flush_cache_page(vma, vmaddr, PFN_PHYS(pfn));
+ __flush_cache_page(vma, vmaddr, PFN_PHYS(pfn));
+ } else {
+ __purge_cache_page(vma, vmaddr, PFN_PHYS(pfn));
+ }
}
}
diff --git a/arch/parisc/kernel/pacache.S b/arch/parisc/kernel/pacache.S
index b41c0136a05f..187f032c9dd8 100644
--- a/arch/parisc/kernel/pacache.S
+++ b/arch/parisc/kernel/pacache.S
@@ -838,8 +838,7 @@ ENTRY_CFI(flush_dcache_page_asm)
add %r28, %r25, %r25
sub %r25, r31, %r25
-
-1: fdc,m r31(%r28)
+1: fdc,m r31(%r28)
fdc,m r31(%r28)
fdc,m r31(%r28)
fdc,m r31(%r28)
@@ -854,7 +853,7 @@ ENTRY_CFI(flush_dcache_page_asm)
fdc,m r31(%r28)
fdc,m r31(%r28)
fdc,m r31(%r28)
- cmpb,COND(<<) %r28, %r25,1b
+ cmpb,COND(>>) %r25, %r28, 1b /* predict taken */
fdc,m r31(%r28)
89: ALTERNATIVE(88b, 89b, ALT_COND_NO_DCACHE, INSN_NOP)
@@ -863,6 +862,67 @@ ENTRY_CFI(flush_dcache_page_asm)
nop
ENDPROC_CFI(flush_dcache_page_asm)
+ENTRY_CFI(purge_dcache_page_asm)
+ ldil L%(TMPALIAS_MAP_START), %r28
+#ifdef CONFIG_64BIT
+#if (TMPALIAS_MAP_START >= 0x80000000)
+ depdi 0, 31,32, %r28 /* clear any sign extension */
+#endif
+ convert_phys_for_tlb_insert20 %r26 /* convert phys addr to tlb insert format */
+ depd %r25, 63,22, %r28 /* Form aliased virtual address 'to' */
+ depdi 0, 63,PAGE_SHIFT, %r28 /* Clear any offset bits */
+#else
+ extrw,u %r26, 24,25, %r26 /* convert phys addr to tlb insert format */
+ depw %r25, 31,22, %r28 /* Form aliased virtual address 'to' */
+ depwi 0, 31,PAGE_SHIFT, %r28 /* Clear any offset bits */
+#endif
+
+ /* Purge any old translation */
+
+#ifdef CONFIG_PA20
+ pdtlb,l %r0(%r28)
+#else
+ tlb_lock %r20,%r21,%r22
+0: pdtlb %r0(%r28)
+ tlb_unlock %r20,%r21,%r22
+ ALTERNATIVE(0b, 0b+4, ALT_COND_NO_SMP, INSN_PxTLB)
+#endif
+
+88: ldil L%dcache_stride, %r1
+ ldw R%dcache_stride(%r1), r31
+
+#ifdef CONFIG_64BIT
+ depdi,z 1, 63-PAGE_SHIFT,1, %r25
+#else
+ depwi,z 1, 31-PAGE_SHIFT,1, %r25
+#endif
+ add %r28, %r25, %r25
+ sub %r25, r31, %r25
+
+1: pdc,m r31(%r28)
+ pdc,m r31(%r28)
+ pdc,m r31(%r28)
+ pdc,m r31(%r28)
+ pdc,m r31(%r28)
+ pdc,m r31(%r28)
+ pdc,m r31(%r28)
+ pdc,m r31(%r28)
+ pdc,m r31(%r28)
+ pdc,m r31(%r28)
+ pdc,m r31(%r28)
+ pdc,m r31(%r28)
+ pdc,m r31(%r28)
+ pdc,m r31(%r28)
+ pdc,m r31(%r28)
+ cmpb,COND(>>) %r25, %r28, 1b /* predict taken */
+ pdc,m r31(%r28)
+
+89: ALTERNATIVE(88b, 89b, ALT_COND_NO_DCACHE, INSN_NOP)
+ sync
+ bv %r0(%r2)
+ nop
+ENDPROC_CFI(purge_dcache_page_asm)
+
ENTRY_CFI(flush_icache_page_asm)
ldil L%(TMPALIAS_MAP_START), %r28
#ifdef CONFIG_64BIT
@@ -908,7 +968,6 @@ ENTRY_CFI(flush_icache_page_asm)
add %r28, %r25, %r25
sub %r25, %r31, %r25
-
/* fic only has the type 26 form on PA1.1, requiring an
* explicit space specification, so use %sr4 */
1: fic,m %r31(%sr4,%r28)
@@ -926,7 +985,7 @@ ENTRY_CFI(flush_icache_page_asm)
fic,m %r31(%sr4,%r28)
fic,m %r31(%sr4,%r28)
fic,m %r31(%sr4,%r28)
- cmpb,COND(<<) %r28, %r25,1b
+ cmpb,COND(>>) %r25, %r28, 1b /* predict taken */
fic,m %r31(%sr4,%r28)
89: ALTERNATIVE(88b, 89b, ALT_COND_NO_ICACHE, INSN_NOP)
@@ -947,7 +1006,6 @@ ENTRY_CFI(flush_kernel_dcache_page_asm)
add %r26, %r25, %r25
sub %r25, %r23, %r25
-
1: fdc,m %r23(%r26)
fdc,m %r23(%r26)
fdc,m %r23(%r26)
@@ -963,7 +1021,7 @@ ENTRY_CFI(flush_kernel_dcache_page_asm)
fdc,m %r23(%r26)
fdc,m %r23(%r26)
fdc,m %r23(%r26)
- cmpb,COND(<<) %r26, %r25,1b
+ cmpb,COND(>>) %r25, %r26, 1b /* predict taken */
fdc,m %r23(%r26)
89: ALTERNATIVE(88b, 89b, ALT_COND_NO_DCACHE, INSN_NOP)
@@ -999,7 +1057,7 @@ ENTRY_CFI(purge_kernel_dcache_page_asm)
pdc,m %r23(%r26)
pdc,m %r23(%r26)
pdc,m %r23(%r26)
- cmpb,COND(<<) %r26, %r25, 1b
+ cmpb,COND(>>) %r25, %r26, 1b /* predict taken */
pdc,m %r23(%r26)
89: ALTERNATIVE(88b, 89b, ALT_COND_NO_DCACHE, INSN_NOP)
@@ -1014,7 +1072,33 @@ ENTRY_CFI(flush_user_dcache_range_asm)
ldo -1(%r23), %r21
ANDCM %r26, %r21, %r26
-1: cmpb,COND(<<),n %r26, %r25, 1b
+#ifdef CONFIG_64BIT
+ depd,z %r23, 59, 60, %r21
+#else
+ depw,z %r23, 27, 28, %r21
+#endif
+ add %r26, %r21, %r22
+ cmpb,COND(>>),n %r22, %r25, 2f /* predict not taken */
+1: add %r22, %r21, %r22
+ fdc,m %r23(%sr3, %r26)
+ fdc,m %r23(%sr3, %r26)
+ fdc,m %r23(%sr3, %r26)
+ fdc,m %r23(%sr3, %r26)
+ fdc,m %r23(%sr3, %r26)
+ fdc,m %r23(%sr3, %r26)
+ fdc,m %r23(%sr3, %r26)
+ fdc,m %r23(%sr3, %r26)
+ fdc,m %r23(%sr3, %r26)
+ fdc,m %r23(%sr3, %r26)
+ fdc,m %r23(%sr3, %r26)
+ fdc,m %r23(%sr3, %r26)
+ fdc,m %r23(%sr3, %r26)
+ fdc,m %r23(%sr3, %r26)
+ fdc,m %r23(%sr3, %r26)
+ cmpb,COND(<<=) %r22, %r25, 1b /* predict taken */
+ fdc,m %r23(%sr3, %r26)
+
+2: cmpb,COND(>>),n %r25, %r26, 2b
fdc,m %r23(%sr3, %r26)
89: ALTERNATIVE(88b, 89b, ALT_COND_NO_DCACHE, INSN_NOP)
@@ -1029,7 +1113,33 @@ ENTRY_CFI(flush_kernel_dcache_range_asm)
ldo -1(%r23), %r21
ANDCM %r26, %r21, %r26
-1: cmpb,COND(<<),n %r26, %r25,1b
+#ifdef CONFIG_64BIT
+ depd,z %r23, 59, 60, %r21
+#else
+ depw,z %r23, 27, 28, %r21
+#endif
+ add %r26, %r21, %r22
+ cmpb,COND(>>),n %r22, %r25, 2f /* predict not taken */
+1: add %r22, %r21, %r22
+ fdc,m %r23(%r26)
+ fdc,m %r23(%r26)
+ fdc,m %r23(%r26)
+ fdc,m %r23(%r26)
+ fdc,m %r23(%r26)
+ fdc,m %r23(%r26)
+ fdc,m %r23(%r26)
+ fdc,m %r23(%r26)
+ fdc,m %r23(%r26)
+ fdc,m %r23(%r26)
+ fdc,m %r23(%r26)
+ fdc,m %r23(%r26)
+ fdc,m %r23(%r26)
+ fdc,m %r23(%r26)
+ fdc,m %r23(%r26)
+ cmpb,COND(<<=) %r22, %r25, 1b /* predict taken */
+ fdc,m %r23(%r26)
+
+2: cmpb,COND(>>),n %r25, %r26, 2b /* predict taken */
fdc,m %r23(%r26)
sync
@@ -1045,7 +1155,33 @@ ENTRY_CFI(purge_kernel_dcache_range_asm)
ldo -1(%r23), %r21
ANDCM %r26, %r21, %r26
-1: cmpb,COND(<<),n %r26, %r25,1b
+#ifdef CONFIG_64BIT
+ depd,z %r23, 59, 60, %r21
+#else
+ depw,z %r23, 27, 28, %r21
+#endif
+ add %r26, %r21, %r22
+ cmpb,COND(>>),n %r22, %r25, 2f /* predict not taken */
+1: add %r22, %r21, %r22
+ pdc,m %r23(%r26)
+ pdc,m %r23(%r26)
+ pdc,m %r23(%r26)
+ pdc,m %r23(%r26)
+ pdc,m %r23(%r26)
+ pdc,m %r23(%r26)
+ pdc,m %r23(%r26)
+ pdc,m %r23(%r26)
+ pdc,m %r23(%r26)
+ pdc,m %r23(%r26)
+ pdc,m %r23(%r26)
+ pdc,m %r23(%r26)
+ pdc,m %r23(%r26)
+ pdc,m %r23(%r26)
+ pdc,m %r23(%r26)
+ cmpb,COND(<<=) %r22, %r25, 1b /* predict taken */
+ pdc,m %r23(%r26)
+
+2: cmpb,COND(>>),n %r25, %r26, 2b /* predict taken */
pdc,m %r23(%r26)
sync
@@ -1061,7 +1197,33 @@ ENTRY_CFI(flush_user_icache_range_asm)
ldo -1(%r23), %r21
ANDCM %r26, %r21, %r26
-1: cmpb,COND(<<),n %r26, %r25,1b
+#ifdef CONFIG_64BIT
+ depd,z %r23, 59, 60, %r21
+#else
+ depw,z %r23, 27, 28, %r21
+#endif
+ add %r26, %r21, %r22
+ cmpb,COND(>>),n %r22, %r25, 2f /* predict not taken */
+1: add %r22, %r21, %r22
+ fic,m %r23(%sr3, %r26)
+ fic,m %r23(%sr3, %r26)
+ fic,m %r23(%sr3, %r26)
+ fic,m %r23(%sr3, %r26)
+ fic,m %r23(%sr3, %r26)
+ fic,m %r23(%sr3, %r26)
+ fic,m %r23(%sr3, %r26)
+ fic,m %r23(%sr3, %r26)
+ fic,m %r23(%sr3, %r26)
+ fic,m %r23(%sr3, %r26)
+ fic,m %r23(%sr3, %r26)
+ fic,m %r23(%sr3, %r26)
+ fic,m %r23(%sr3, %r26)
+ fic,m %r23(%sr3, %r26)
+ fic,m %r23(%sr3, %r26)
+ cmpb,COND(<<=) %r22, %r25, 1b /* predict taken */
+ fic,m %r23(%sr3, %r26)
+
+2: cmpb,COND(>>),n %r25, %r26, 2b
fic,m %r23(%sr3, %r26)
89: ALTERNATIVE(88b, 89b, ALT_COND_NO_ICACHE, INSN_NOP)
@@ -1098,7 +1260,7 @@ ENTRY_CFI(flush_kernel_icache_page)
fic,m %r23(%sr4, %r26)
fic,m %r23(%sr4, %r26)
fic,m %r23(%sr4, %r26)
- cmpb,COND(<<) %r26, %r25, 1b
+ cmpb,COND(>>) %r25, %r26, 1b /* predict taken */
fic,m %r23(%sr4, %r26)
89: ALTERNATIVE(88b, 89b, ALT_COND_NO_ICACHE, INSN_NOP)
@@ -1113,7 +1275,33 @@ ENTRY_CFI(flush_kernel_icache_range_asm)
ldo -1(%r23), %r21
ANDCM %r26, %r21, %r26
-1: cmpb,COND(<<),n %r26, %r25, 1b
+#ifdef CONFIG_64BIT
+ depd,z %r23, 59, 60, %r21
+#else
+ depw,z %r23, 27, 28, %r21
+#endif
+ add %r26, %r21, %r22
+ cmpb,COND(>>),n %r22, %r25, 2f /* predict not taken */
+1: add %r22, %r21, %r22
+ fic,m %r23(%sr4, %r26)
+ fic,m %r23(%sr4, %r26)
+ fic,m %r23(%sr4, %r26)
+ fic,m %r23(%sr4, %r26)
+ fic,m %r23(%sr4, %r26)
+ fic,m %r23(%sr4, %r26)
+ fic,m %r23(%sr4, %r26)
+ fic,m %r23(%sr4, %r26)
+ fic,m %r23(%sr4, %r26)
+ fic,m %r23(%sr4, %r26)
+ fic,m %r23(%sr4, %r26)
+ fic,m %r23(%sr4, %r26)
+ fic,m %r23(%sr4, %r26)
+ fic,m %r23(%sr4, %r26)
+ fic,m %r23(%sr4, %r26)
+ cmpb,COND(<<=) %r22, %r25, 1b /* predict taken */
+ fic,m %r23(%sr4, %r26)
+
+2: cmpb,COND(>>),n %r25, %r26, 2b /* predict taken */
fic,m %r23(%sr4, %r26)
89: ALTERNATIVE(88b, 89b, ALT_COND_NO_ICACHE, INSN_NOP)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.