aboutsummaryrefslogtreecommitdiffstats
path: root/arch/sh
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sh')
-rw-r--r--arch/sh/mm/cache-sh2a.c6
-rw-r--r--arch/sh/mm/cache-sh4.c61
-rw-r--r--arch/sh/mm/cache-sh5.c29
-rw-r--r--arch/sh/mm/cache-sh7705.c8
4 files changed, 71 insertions, 33 deletions
diff --git a/arch/sh/mm/cache-sh2a.c b/arch/sh/mm/cache-sh2a.c
index d783361..975899d 100644
--- a/arch/sh/mm/cache-sh2a.c
+++ b/arch/sh/mm/cache-sh2a.c
@@ -102,10 +102,12 @@ static void sh2a_flush_icache_range(void *args)
struct flusher_data *data = args;
unsigned long start, end;
unsigned long v;
+ unsigned long flags;
start = data->addr1 & ~(L1_CACHE_BYTES-1);
end = (data->addr2 + L1_CACHE_BYTES-1) & ~(L1_CACHE_BYTES-1);
+ local_irq_save(flags);
jump_to_uncached();
for (v = start; v < end; v+=L1_CACHE_BYTES) {
@@ -120,10 +122,12 @@ static void sh2a_flush_icache_range(void *args)
}
}
/* I-Cache invalidate */
- ctrl_outl(addr, CACHE_IC_ADDRESS_ARRAY | addr | 0x00000008);
+ ctrl_outl(addr,
+ CACHE_IC_ADDRESS_ARRAY | addr | 0x00000008);
}
back_to_cached();
+ local_irq_restore(flags);
}
void __init sh2a_cache_init(void)
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index 70fb906..3ac4945 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -48,44 +48,48 @@ static void sh4_flush_icache_range(void *args)
struct flusher_data *data = args;
int icacheaddr;
unsigned long start, end;
- unsigned long v;
+ unsigned long flags, v;
int i;
start = data->addr1;
end = data->addr2;
- /* If there are too many pages then just blow the caches */
- if (((end - start) >> PAGE_SHIFT) >= MAX_ICACHE_PAGES) {
- local_flush_cache_all(args);
- } else {
- /* selectively flush d-cache then invalidate the i-cache */
- /* this is inefficient, so only use for small ranges */
- start &= ~(L1_CACHE_BYTES-1);
- end += L1_CACHE_BYTES-1;
- end &= ~(L1_CACHE_BYTES-1);
-
- jump_to_uncached();
-
- for (v = start; v < end; v+=L1_CACHE_BYTES) {
- __ocbwb(v);
-
- icacheaddr = CACHE_IC_ADDRESS_ARRAY |
- (v & cpu_data->icache.entry_mask);
-
- for (i = 0; i < cpu_data->icache.ways;
- i++, icacheaddr += cpu_data->icache.way_incr)
- /* Clear i-cache line valid-bit */
- ctrl_outl(0, icacheaddr);
- }
+ /* If there are too many pages then just blow the caches */
+ if (((end - start) >> PAGE_SHIFT) >= MAX_ICACHE_PAGES) {
+ local_flush_cache_all(args);
+ } else {
+ /* selectively flush d-cache then invalidate the i-cache */
+ /* this is inefficient, so only use for small ranges */
+ start &= ~(L1_CACHE_BYTES-1);
+ end += L1_CACHE_BYTES-1;
+ end &= ~(L1_CACHE_BYTES-1);
+
+ local_irq_save(flags);
+ jump_to_uncached();
+
+ for (v = start; v < end; v+=L1_CACHE_BYTES) {
+ asm volatile("ocbwb %0"
+ : /* no output */
+ : "m" (__m(v)));
+
+ icacheaddr = CACHE_IC_ADDRESS_ARRAY | (
+ v & cpu_data->icache.entry_mask);
+
+ for (i = 0; i < cpu_data->icache.ways;
+ i++, icacheaddr += cpu_data->icache.way_incr)
+ /* Clear i-cache line valid-bit */
+ ctrl_outl(0, icacheaddr);
+ }
back_to_cached();
+ local_irq_restore(flags);
}
}
static inline void flush_cache_4096(unsigned long start,
unsigned long phys)
{
- unsigned long exec_offset = 0;
+ unsigned long flags, exec_offset = 0;
/*
* All types of SH-4 require PC to be in P2 to operate on the I-cache.
@@ -95,8 +99,10 @@ static inline void flush_cache_4096(unsigned long start,
(start < CACHE_OC_ADDRESS_ARRAY))
exec_offset = 0x20000000;
+ local_irq_save(flags);
__flush_cache_4096(start | SH_CACHE_ASSOC,
P1SEGADDR(phys), exec_offset);
+ local_irq_restore(flags);
}
/*
@@ -130,8 +136,9 @@ static void sh4_flush_dcache_page(void *arg)
/* TODO: Selective icache invalidation through IC address array.. */
static void __uses_jump_to_uncached flush_icache_all(void)
{
- unsigned long ccr;
+ unsigned long flags, ccr;
+ local_irq_save(flags);
jump_to_uncached();
/* Flush I-cache */
@@ -143,7 +150,9 @@ static void __uses_jump_to_uncached flush_icache_all(void)
* back_to_cached() will take care of the barrier for us, don't add
* another one!
*/
+
back_to_cached();
+ local_irq_restore(flags);
}
static inline void flush_dcache_all(void)
diff --git a/arch/sh/mm/cache-sh5.c b/arch/sh/mm/cache-sh5.c
index 2f9dd6d..467ff8e 100644
--- a/arch/sh/mm/cache-sh5.c
+++ b/arch/sh/mm/cache-sh5.c
@@ -34,22 +34,28 @@ static inline void
sh64_setup_dtlb_cache_slot(unsigned long eaddr, unsigned long asid,
unsigned long paddr)
{
+ local_irq_disable();
sh64_setup_tlb_slot(dtlb_cache_slot, eaddr, asid, paddr);
}
static inline void sh64_teardown_dtlb_cache_slot(void)
{
sh64_teardown_tlb_slot(dtlb_cache_slot);
+ local_irq_enable();
}
static inline void sh64_icache_inv_all(void)
{
unsigned long long addr, flag, data;
+ unsigned long flags;
addr = ICCR0;
flag = ICCR0_ICI;
data = 0;
+ /* Make this a critical section for safety (probably not strictly necessary.) */
+ local_irq_save(flags);
+
/* Without %1 it gets unexplicably wrong */
__asm__ __volatile__ (
"getcfg %3, 0, %0\n\t"
@@ -58,6 +64,8 @@ static inline void sh64_icache_inv_all(void)
"synci"
: "=&r" (data)
: "0" (data), "r" (flag), "r" (addr));
+
+ local_irq_restore(flags);
}
static void sh64_icache_inv_kernel_range(unsigned long start, unsigned long end)
@@ -82,6 +90,7 @@ static void sh64_icache_inv_user_page(struct vm_area_struct *vma, unsigned long
Also, eaddr is page-aligned. */
unsigned int cpu = smp_processor_id();
unsigned long long addr, end_addr;
+ unsigned long flags = 0;
unsigned long running_asid, vma_asid;
addr = eaddr;
end_addr = addr + PAGE_SIZE;
@@ -102,9 +111,10 @@ static void sh64_icache_inv_user_page(struct vm_area_struct *vma, unsigned long
running_asid = get_asid();
vma_asid = cpu_asid(cpu, vma->vm_mm);
- if (running_asid != vma_asid)
+ if (running_asid != vma_asid) {
+ local_irq_save(flags);
switch_and_save_asid(vma_asid);
-
+ }
while (addr < end_addr) {
/* Worth unrolling a little */
__asm__ __volatile__("icbi %0, 0" : : "r" (addr));
@@ -113,9 +123,10 @@ static void sh64_icache_inv_user_page(struct vm_area_struct *vma, unsigned long
__asm__ __volatile__("icbi %0, 96" : : "r" (addr));
addr += 128;
}
-
- if (running_asid != vma_asid)
+ if (running_asid != vma_asid) {
switch_and_save_asid(running_asid);
+ local_irq_restore(flags);
+ }
}
static void sh64_icache_inv_user_page_range(struct mm_struct *mm,
@@ -148,12 +159,16 @@ static void sh64_icache_inv_user_page_range(struct mm_struct *mm,
unsigned long eaddr;
unsigned long after_last_page_start;
unsigned long mm_asid, current_asid;
+ unsigned long flags = 0;
mm_asid = cpu_asid(smp_processor_id(), mm);
current_asid = get_asid();
- if (mm_asid != current_asid)
+ if (mm_asid != current_asid) {
+ /* Switch ASID and run the invalidate loop under cli */
+ local_irq_save(flags);
switch_and_save_asid(mm_asid);
+ }
aligned_start = start & PAGE_MASK;
after_last_page_start = PAGE_SIZE + ((end - 1) & PAGE_MASK);
@@ -179,8 +194,10 @@ static void sh64_icache_inv_user_page_range(struct mm_struct *mm,
aligned_start = vma->vm_end; /* Skip to start of next region */
}
- if (mm_asid != current_asid)
+ if (mm_asid != current_asid) {
switch_and_save_asid(current_asid);
+ local_irq_restore(flags);
+ }
}
}
diff --git a/arch/sh/mm/cache-sh7705.c b/arch/sh/mm/cache-sh7705.c
index 9dc3866..6293f57 100644
--- a/arch/sh/mm/cache-sh7705.c
+++ b/arch/sh/mm/cache-sh7705.c
@@ -81,6 +81,7 @@ static void sh7705_flush_icache_range(void *args)
static void __flush_dcache_page(unsigned long phys)
{
unsigned long ways, waysize, addrstart;
+ unsigned long flags;
phys |= SH_CACHE_VALID;
@@ -97,6 +98,7 @@ static void __flush_dcache_page(unsigned long phys)
* potential cache aliasing, therefore the optimisation is probably not
* possible.
*/
+ local_irq_save(flags);
jump_to_uncached();
ways = current_cpu_data.dcache.ways;
@@ -124,6 +126,7 @@ static void __flush_dcache_page(unsigned long phys)
} while (--ways);
back_to_cached();
+ local_irq_restore(flags);
}
/*
@@ -142,9 +145,14 @@ static void sh7705_flush_dcache_page(void *page)
static void sh7705_flush_cache_all(void *args)
{
+ unsigned long flags;
+
+ local_irq_save(flags);
jump_to_uncached();
+
cache_wback_all();
back_to_cached();
+ local_irq_restore(flags);
}
/*
generated by cgit v1.1 at 2024-10-31 12:23:44 +0000