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sh: Make cache flushers SMP-aware. 

This does a bit of rework for making the cache flushers SMP-aware. The
function pointer-based flushers are renamed to local variants with the
exported interface being commonly implemented and wrapping as necessary.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2009-08-21 17:23:14 +09:00
parent f9bd71f255
commit f26b2a562b
6 changed files with 213 additions and 160 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
arch/sh/include/asm/cacheflush.h
View File

@ -19,23 +19,40 @@
* - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
* - flush_cache_sigtramp(vaddr) flushes the signal trampoline
*/
extern void (*flush_cache_all)(void);
extern void (*flush_cache_mm)(struct mm_struct *mm);
extern void (*flush_cache_dup_mm)(struct mm_struct *mm);
extern void (*flush_cache_page)(struct vm_area_struct *vma,
unsigned long addr, unsigned long pfn);
extern void (*flush_cache_range)(struct vm_area_struct *vma,
unsigned long start, unsigned long end);
extern void (*flush_dcache_page)(struct page *page);
extern void (*flush_icache_range)(unsigned long start, unsigned long end);
extern void (*flush_icache_page)(struct vm_area_struct *vma,
struct page *page);
extern void (*flush_cache_sigtramp)(unsigned long address);
extern void (*local_flush_cache_all)(void *args);
extern void (*local_flush_cache_mm)(void *args);
extern void (*local_flush_cache_dup_mm)(void *args);
extern void (*local_flush_cache_page)(void *args);
extern void (*local_flush_cache_range)(void *args);
extern void (*local_flush_dcache_page)(void *args);
extern void (*local_flush_icache_range)(void *args);
extern void (*local_flush_icache_page)(void *args);
extern void (*local_flush_cache_sigtramp)(void *args);
static inline void cache_noop(void *args) { }
extern void (*__flush_wback_region)(void *start, int size);
extern void (*__flush_purge_region)(void *start, int size);
extern void (*__flush_invalidate_region)(void *start, int size);
extern void flush_cache_all(void);
extern void flush_cache_mm(struct mm_struct *mm);
extern void flush_cache_dup_mm(struct mm_struct *mm);
extern void flush_cache_page(struct vm_area_struct *vma,
unsigned long addr, unsigned long pfn);
extern void flush_cache_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end);
extern void flush_dcache_page(struct page *page);
extern void flush_icache_range(unsigned long start, unsigned long end);
extern void flush_icache_page(struct vm_area_struct *vma,
struct page *page);
extern void flush_cache_sigtramp(unsigned long address);
struct flusher_data {
struct vm_area_struct *vma;
unsigned long addr1, addr2;
};
#define ARCH_HAS_FLUSH_ANON_PAGE
extern void __flush_anon_page(struct page *page, unsigned long);

10
arch/sh/mm/cache-sh2a.c
View File

@ -97,13 +97,15 @@ static void sh2a__flush_invalidate_region(void *start, int size)
}
/* WBack O-Cache and flush I-Cache */
static void sh2a_flush_icache_range(unsigned long start, unsigned long end)
static void sh2a_flush_icache_range(void *args)
{
struct flusher_data *data = args;
unsigned long start, end;
unsigned long v;
unsigned long flags;
start = start & ~(L1_CACHE_BYTES-1);
end = (end + L1_CACHE_BYTES-1) & ~(L1_CACHE_BYTES-1);
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();
@ -130,7 +132,7 @@ static void sh2a_flush_icache_range(unsigned long start, unsigned long end)
void __init sh2a_cache_init(void)
{
flush_icache_range = sh2a_flush_icache_range;
local_flush_icache_range = sh2a_flush_icache_range;
__flush_wback_region = sh2a__flush_wback_region;
__flush_purge_region = sh2a__flush_purge_region;

54
arch/sh/mm/cache-sh4.c
View File

@ -43,15 +43,20 @@ static void (*__flush_dcache_segment_fn)(unsigned long, unsigned long) =
* Called from kernel/module.c:sys_init_module and routine for a.out format,
* signal handler code and kprobes code
*/
static void sh4_flush_icache_range(unsigned long start, unsigned long end)
static void sh4_flush_icache_range(void *args)
{
struct flusher_data *data = args;
int icacheaddr;
unsigned long start, end;
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) {
flush_cache_all();
local_flush_cache_all(args);
} else {
/* selectively flush d-cache then invalidate the i-cache */
/* this is inefficient, so only use for small ranges */
@ -104,7 +109,7 @@ static inline void flush_cache_4096(unsigned long start,
* Write back & invalidate the D-cache of the page.
* (To avoid "alias" issues)
*/
static void sh4_flush_dcache_page(struct page *page)
static void sh4_flush_dcache_page(void *page)
{
#ifndef CONFIG_SMP
struct address_space *mapping = page_mapping(page);
@ -155,7 +160,7 @@ static inline void flush_dcache_all(void)
wmb();
}
static void sh4_flush_cache_all(void)
static void sh4_flush_cache_all(void *unused)
{
flush_dcache_all();
flush_icache_all();
@ -247,8 +252,10 @@ static void __flush_cache_mm(struct mm_struct *mm, unsigned long start,
*
* Caller takes mm->mmap_sem.
*/
static void sh4_flush_cache_mm(struct mm_struct *mm)
static void sh4_flush_cache_mm(void *arg)
{
struct mm_struct *mm = arg;
if (cpu_context(smp_processor_id(), mm) == NO_CONTEXT)
return;
@ -287,12 +294,18 @@ static void sh4_flush_cache_mm(struct mm_struct *mm)
* ADDR: Virtual Address (U0 address)
* PFN: Physical page number
*/
static void sh4_flush_cache_page(struct vm_area_struct *vma,
unsigned long address, unsigned long pfn)
static void sh4_flush_cache_page(void *args)
{
unsigned long phys = pfn << PAGE_SHIFT;
struct flusher_data *data = args;
struct vm_area_struct *vma;
unsigned long address, pfn, phys;
unsigned int alias_mask;
vma = data->vma;
address = data->addr1;
pfn = data->addr2;
phys = pfn << PAGE_SHIFT;
if (cpu_context(smp_processor_id(), vma->vm_mm) == NO_CONTEXT)
return;
@ -335,9 +348,16 @@ static void sh4_flush_cache_page(struct vm_area_struct *vma,
* Flushing the cache lines for U0 only isn't enough.
* We need to flush for P1 too, which may contain aliases.
*/
static void sh4_flush_cache_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
static void sh4_flush_cache_range(void *args)
{
struct flusher_data *data = args;
struct vm_area_struct *vma;
unsigned long start, end;
vma = data->vma;
start = data->addr1;
end = data->addr2;
if (cpu_context(smp_processor_id(), vma->vm_mm) == NO_CONTEXT)
return;
@ -663,13 +683,13 @@ void __init sh4_cache_init(void)
break;
}
flush_icache_range = sh4_flush_icache_range;
flush_dcache_page = sh4_flush_dcache_page;
flush_cache_all = sh4_flush_cache_all;
flush_cache_mm = sh4_flush_cache_mm;
flush_cache_dup_mm = sh4_flush_cache_mm;
flush_cache_page = sh4_flush_cache_page;
flush_cache_range = sh4_flush_cache_range;
local_flush_icache_range = sh4_flush_icache_range;
local_flush_dcache_page = sh4_flush_dcache_page;
local_flush_cache_all = sh4_flush_cache_all;
local_flush_cache_mm = sh4_flush_cache_mm;
local_flush_cache_dup_mm = sh4_flush_cache_mm;
local_flush_cache_page = sh4_flush_cache_page;
local_flush_cache_range = sh4_flush_cache_range;
sh4__flush_region_init();
}

64
arch/sh/mm/cache-sh5.c
View File

@ -483,7 +483,7 @@ static void sh64_dcache_purge_user_range(struct mm_struct *mm,
* Invalidate the entire contents of both caches, after writing back to
* memory any dirty data from the D-cache.
*/
static void sh5_flush_cache_all(void)
static void sh5_flush_cache_all(void *unused)
{
sh64_dcache_purge_all();
sh64_icache_inv_all();
@ -510,7 +510,7 @@ static void sh5_flush_cache_all(void)
* I-cache. This is similar to the lack of action needed in
* flush_tlb_mm - see fault.c.
*/
static void sh5_flush_cache_mm(struct mm_struct *mm)
static void sh5_flush_cache_mm(void *unused)
{
sh64_dcache_purge_all();
}
@ -522,13 +522,18 @@ static void sh5_flush_cache_mm(struct mm_struct *mm)
*
* Note, 'end' is 1 byte beyond the end of the range to flush.
*/
static void sh5_flush_cache_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
static void sh5_flush_cache_range(void *args)
{
struct mm_struct *mm = vma->vm_mm;
struct flusher_data *data = args;
struct vm_area_struct *vma;
unsigned long start, end;
sh64_dcache_purge_user_range(mm, start, end);
sh64_icache_inv_user_page_range(mm, start, end);
vma = data->vma;
start = data->addr1;
end = data->addr2;
sh64_dcache_purge_user_range(vma->vm_mm, start, end);
sh64_icache_inv_user_page_range(vma->vm_mm, start, end);
}
/*
@ -540,16 +545,23 @@ static void sh5_flush_cache_range(struct vm_area_struct *vma,
*
* Note, this is called with pte lock held.
*/
static void sh5_flush_cache_page(struct vm_area_struct *vma,
unsigned long eaddr, unsigned long pfn)
static void sh5_flush_cache_page(void *args)
{
struct flusher_data *data = args;
struct vm_area_struct *vma;
unsigned long eaddr, pfn;
vma = data->vma;
eaddr = data->addr1;
pfn = data->addr2;
sh64_dcache_purge_phy_page(pfn << PAGE_SHIFT);
if (vma->vm_flags & VM_EXEC)
sh64_icache_inv_user_page(vma, eaddr);
}
static void sh5_flush_dcache_page(struct page *page)
static void sh5_flush_dcache_page(void *page)
{
sh64_dcache_purge_phy_page(page_to_phys(page));
wmb();
@ -563,8 +575,14 @@ static void sh5_flush_dcache_page(struct page *page)
* mapping, therefore it's guaranteed that there no cache entries for
* the range in cache sets of the wrong colour.
*/
static void sh5_flush_icache_range(unsigned long start, unsigned long end)
static void sh5_flush_icache_range(void *args)
{
struct flusher_data *data = args;
unsigned long start, end;
start = data->addr1;
end = data->addr2;
__flush_purge_region((void *)start, end);
wmb();
sh64_icache_inv_kernel_range(start, end);
@ -576,25 +594,25 @@ static void sh5_flush_icache_range(unsigned long start, unsigned long end)
* current process. Used to flush signal trampolines on the stack to
* make them executable.
*/
static void sh5_flush_cache_sigtramp(unsigned long vaddr)
static void sh5_flush_cache_sigtramp(void *vaddr)
{
unsigned long end = vaddr + L1_CACHE_BYTES;
unsigned long end = (unsigned long)vaddr + L1_CACHE_BYTES;
__flush_wback_region((void *)vaddr, L1_CACHE_BYTES);
__flush_wback_region(vaddr, L1_CACHE_BYTES);
wmb();
sh64_icache_inv_current_user_range(vaddr, end);
sh64_icache_inv_current_user_range((unsigned long)vaddr, end);
}
void __init sh5_cache_init(void)
{
flush_cache_all = sh5_flush_cache_all;
flush_cache_mm = sh5_flush_cache_mm;
flush_cache_dup_mm = sh5_flush_cache_mm;
flush_cache_page = sh5_flush_cache_page;
flush_cache_range = sh5_flush_cache_range;
flush_dcache_page = sh5_flush_dcache_page;
flush_icache_range = sh5_flush_icache_range;
flush_cache_sigtramp = sh5_flush_cache_sigtramp;
local_flush_cache_all = sh5_flush_cache_all;
local_flush_cache_mm = sh5_flush_cache_mm;
local_flush_cache_dup_mm = sh5_flush_cache_mm;
local_flush_cache_page = sh5_flush_cache_page;
local_flush_cache_range = sh5_flush_cache_range;
local_flush_dcache_page = sh5_flush_dcache_page;
local_flush_icache_range = sh5_flush_icache_range;
local_flush_cache_sigtramp = sh5_flush_cache_sigtramp;
/* Reserve a slot for dcache colouring in the DTLB */
dtlb_cache_slot = sh64_get_wired_dtlb_entry();

67
arch/sh/mm/cache-sh7705.c
View File

@ -64,8 +64,14 @@ static inline void cache_wback_all(void)
*
* Called from kernel/module.c:sys_init_module and routine for a.out format.
*/
static void sh7705_flush_icache_range(unsigned long start, unsigned long end)
static void sh7705_flush_icache_range(void *args)
{
struct flusher_data *data = args;
unsigned long start, end;
start = data->addr1;
end = data->addr2;
__flush_wback_region((void *)start, end - start);
}
@ -127,7 +133,7 @@ static void __flush_dcache_page(unsigned long phys)
* Write back & invalidate the D-cache of the page.
* (To avoid "alias" issues)
*/
static void sh7705_flush_dcache_page(struct page *page)
static void sh7705_flush_dcache_page(void *page)
{
struct address_space *mapping = page_mapping(page);
@ -137,7 +143,7 @@ static void sh7705_flush_dcache_page(struct page *page)
__flush_dcache_page(PHYSADDR(page_address(page)));
}
static void sh7705_flush_cache_all(void)
static void sh7705_flush_cache_all(void *args)
{
unsigned long flags;
@ -149,44 +155,16 @@ static void sh7705_flush_cache_all(void)
local_irq_restore(flags);
}
static void sh7705_flush_cache_mm(struct mm_struct *mm)
{
/* Is there any good way? */
/* XXX: possibly call flush_cache_range for each vm area */
flush_cache_all();
}
/*
* Write back and invalidate D-caches.
*
* START, END: Virtual Address (U0 address)
*
* NOTE: We need to flush the _physical_ page entry.
* Flushing the cache lines for U0 only isn't enough.
* We need to flush for P1 too, which may contain aliases.
*/
static void sh7705_flush_cache_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
/*
* We could call flush_cache_page for the pages of these range,
* but it's not efficient (scan the caches all the time...).
*
* We can't use A-bit magic, as there's the case we don't have
* valid entry on TLB.
*/
flush_cache_all();
}
/*
* Write back and invalidate I/D-caches for the page.
*
* ADDRESS: Virtual Address (U0 address)
*/
static void sh7705_flush_cache_page(struct vm_area_struct *vma,
unsigned long address, unsigned long pfn)
static void sh7705_flush_cache_page(void *args)
{
struct flusher_data *data = args;
unsigned long pfn = data->addr2;
__flush_dcache_page(pfn << PAGE_SHIFT);
}
@ -198,20 +176,19 @@ static void sh7705_flush_cache_page(struct vm_area_struct *vma,
* Not entirely sure why this is necessary on SH3 with 32K cache but
* without it we get occasional "Memory fault" when loading a program.
*/
static void sh7705_flush_icache_page(struct vm_area_struct *vma,
struct page *page)
static void sh7705_flush_icache_page(void *page)
{
__flush_purge_region(page_address(page), PAGE_SIZE);
}
void __init sh7705_cache_init(void)
{
flush_icache_range = sh7705_flush_icache_range;
flush_dcache_page = sh7705_flush_dcache_page;
flush_cache_all = sh7705_flush_cache_all;
flush_cache_mm = sh7705_flush_cache_mm;
flush_cache_dup_mm = sh7705_flush_cache_mm;
flush_cache_range = sh7705_flush_cache_range;
flush_cache_page = sh7705_flush_cache_page;
flush_icache_page = sh7705_flush_icache_page;
local_flush_icache_range = sh7705_flush_icache_range;
local_flush_dcache_page = sh7705_flush_dcache_page;
local_flush_cache_all = sh7705_flush_cache_all;
local_flush_cache_mm = sh7705_flush_cache_all;
local_flush_cache_dup_mm = sh7705_flush_cache_all;
local_flush_cache_range = sh7705_flush_cache_all;
local_flush_cache_page = sh7705_flush_cache_page;
local_flush_icache_page = sh7705_flush_icache_page;
}

137
arch/sh/mm/cache.c
View File

@ -1,5 +1,5 @@
/*
* arch/sh/mm/pg-mmu.c
* arch/sh/mm/cache.c
*
* Copyright (C) 1999, 2000, 2002 Niibe Yutaka
* Copyright (C) 2002 - 2009 Paul Mundt
@ -10,63 +10,26 @@
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/fs.h>
#include <linux/smp.h>
#include <linux/highmem.h>
#include <linux/module.h>
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
void (*flush_cache_all)(void);
void (*flush_cache_mm)(struct mm_struct *mm);
void (*flush_cache_dup_mm)(struct mm_struct *mm);
void (*flush_cache_page)(struct vm_area_struct *vma,
unsigned long addr, unsigned long pfn);
void (*flush_cache_range)(struct vm_area_struct *vma,
unsigned long start, unsigned long end);
void (*flush_dcache_page)(struct page *page);
void (*flush_icache_range)(unsigned long start, unsigned long end);
void (*flush_icache_page)(struct vm_area_struct *vma,
struct page *page);
void (*flush_cache_sigtramp)(unsigned long address);
void (*local_flush_cache_all)(void *args) = cache_noop;
void (*local_flush_cache_mm)(void *args) = cache_noop;
void (*local_flush_cache_dup_mm)(void *args) = cache_noop;
void (*local_flush_cache_page)(void *args) = cache_noop;
void (*local_flush_cache_range)(void *args) = cache_noop;
void (*local_flush_dcache_page)(void *args) = cache_noop;
void (*local_flush_icache_range)(void *args) = cache_noop;
void (*local_flush_icache_page)(void *args) = cache_noop;
void (*local_flush_cache_sigtramp)(void *args) = cache_noop;
void (*__flush_wback_region)(void *start, int size);
void (*__flush_purge_region)(void *start, int size);
void (*__flush_invalidate_region)(void *start, int size);
static inline void noop_flush_cache_all(void)
{
}
static inline void noop_flush_cache_mm(struct mm_struct *mm)
{
}
static inline void noop_flush_cache_page(struct vm_area_struct *vma,
unsigned long addr, unsigned long pfn)
{
}
static inline void noop_flush_cache_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
}
static inline void noop_flush_dcache_page(struct page *page)
{
}
static inline void noop_flush_icache_range(unsigned long start,
unsigned long end)
{
}
static inline void noop_flush_icache_page(struct vm_area_struct *vma,
struct page *page)
{
}
static inline void noop_flush_cache_sigtramp(unsigned long address)
{
}
static inline void noop__flush_region(void *start, int size)
{
}
@ -184,6 +147,72 @@ void __flush_anon_page(struct page *page, unsigned long vmaddr)
}
}
void flush_cache_all(void)
{
on_each_cpu(local_flush_cache_all, NULL, 1);
}
void flush_cache_mm(struct mm_struct *mm)
{
on_each_cpu(local_flush_cache_mm, mm, 1);
}
void flush_cache_dup_mm(struct mm_struct *mm)
{
on_each_cpu(local_flush_cache_dup_mm, mm, 1);
}
void flush_cache_page(struct vm_area_struct *vma, unsigned long addr,
unsigned long pfn)
{
struct flusher_data data;
data.vma = vma;
data.addr1 = addr;
data.addr2 = pfn;
on_each_cpu(local_flush_cache_page, (void *)&data, 1);
}
void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end)
{
struct flusher_data data;
data.vma = vma;
data.addr1 = start;
data.addr2 = end;
on_each_cpu(local_flush_cache_range, (void *)&data, 1);
}
void flush_dcache_page(struct page *page)
{
on_each_cpu(local_flush_dcache_page, page, 1);
}
void flush_icache_range(unsigned long start, unsigned long end)
{
struct flusher_data data;
data.vma = NULL;
data.addr1 = start;
data.addr2 = end;
on_each_cpu(local_flush_icache_range, (void *)&data, 1);
}
void flush_icache_page(struct vm_area_struct *vma, struct page *page)
{
/* Nothing uses the VMA, so just pass the struct page along */
on_each_cpu(local_flush_icache_page, page, 1);
}
void flush_cache_sigtramp(unsigned long address)
{
on_each_cpu(local_flush_cache_sigtramp, (void *)address, 1);
}
static void compute_alias(struct cache_info *c)
{
c->alias_mask = ((c->sets - 1) << c->entry_shift) & ~(PAGE_SIZE - 1);
@ -230,16 +259,6 @@ void __init cpu_cache_init(void)
compute_alias(&boot_cpu_data.dcache);
compute_alias(&boot_cpu_data.scache);
flush_cache_all = noop_flush_cache_all;
flush_cache_mm = noop_flush_cache_mm;
flush_cache_dup_mm = noop_flush_cache_mm;
flush_cache_page = noop_flush_cache_page;
flush_cache_range = noop_flush_cache_range;
flush_dcache_page = noop_flush_dcache_page;
flush_icache_range = noop_flush_icache_range;
flush_icache_page = noop_flush_icache_page;
flush_cache_sigtramp = noop_flush_cache_sigtramp;
__flush_wback_region = noop__flush_region;
__flush_purge_region = noop__flush_region;
__flush_invalidate_region = noop__flush_region;