diff options
| -rw-r--r-- | arch/sh/mm/cache-sh4.c | 72 |
1 files changed, 46 insertions, 26 deletions
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c index 524cea5..94c05d0 100644 --- a/arch/sh/mm/cache-sh4.c +++ b/arch/sh/mm/cache-sh4.c @@ -2,7 +2,7 @@ * arch/sh/mm/cache-sh4.c * * Copyright (C) 1999, 2000, 2002 Niibe Yutaka - * Copyright (C) 2001, 2002, 2003, 2004 Paul Mundt + * Copyright (C) 2001, 2002, 2003, 2004, 2005 Paul Mundt * Copyright (C) 2003 Richard Curnow * * This file is subject to the terms and conditions of the GNU General Public @@ -25,6 +25,8 @@ #include <asm/mmu_context.h> #include <asm/cacheflush.h> +extern void __flush_cache_4096(unsigned long addr, unsigned long phys, + unsigned long exec_offset); extern void __flush_cache_4096_all(unsigned long start); static void __flush_cache_4096_all_ex(unsigned long start); extern void __flush_dcache_all(void); @@ -112,9 +114,14 @@ static void __flush_dcache_all_ex(void) { unsigned long addr, end_addr, entry_offset; - end_addr = CACHE_OC_ADDRESS_ARRAY + (cpu_data->dcache.sets << cpu_data->dcache.entry_shift) * cpu_data->dcache.ways; + end_addr = CACHE_OC_ADDRESS_ARRAY + + (cpu_data->dcache.sets << cpu_data->dcache.entry_shift) * + cpu_data->dcache.ways; + entry_offset = 1 << cpu_data->dcache.entry_shift; - for (addr = CACHE_OC_ADDRESS_ARRAY; addr < end_addr; addr += entry_offset) { + for (addr = CACHE_OC_ADDRESS_ARRAY; + addr < end_addr; + addr += entry_offset) { ctrl_outl(0, addr); } } @@ -125,7 +132,8 @@ static void __flush_cache_4096_all_ex(unsigned long start) int i; entry_offset = 1 << cpu_data->dcache.entry_shift; - for (i = 0; i < cpu_data->dcache.ways; i++, start += cpu_data->dcache.way_incr) { + for (i = 0; i < cpu_data->dcache.ways; + i++, start += cpu_data->dcache.way_incr) { for (addr = CACHE_OC_ADDRESS_ARRAY + start; addr < CACHE_OC_ADDRESS_ARRAY + 4096 + start; addr += entry_offset) { @@ -153,14 +161,14 @@ void flush_icache_range(unsigned long start, unsigned long end) } /* - * Write back the D-cache and purge the I-cache for signal trampoline. + * Write back the D-cache and purge the I-cache for signal trampoline. * .. which happens to be the same behavior as flush_icache_range(). * So, we simply flush out a line. */ void flush_cache_sigtramp(unsigned long addr) { unsigned long v, index; - unsigned long flags; + unsigned long flags; int i; v = addr & ~(L1_CACHE_BYTES-1); @@ -172,7 +180,8 @@ void flush_cache_sigtramp(unsigned long addr) local_irq_save(flags); jump_to_P2(); - for(i = 0; i < cpu_data->icache.ways; i++, index += cpu_data->icache.way_incr) + for (i = 0; i < cpu_data->icache.ways; + i++, index += cpu_data->icache.way_incr) ctrl_outl(0, index); /* Clear out Valid-bit */ back_to_P1(); local_irq_restore(flags); @@ -181,8 +190,7 @@ void flush_cache_sigtramp(unsigned long addr) static inline void flush_cache_4096(unsigned long start, unsigned long phys) { - unsigned long flags; - extern void __flush_cache_4096(unsigned long addr, unsigned long phys, unsigned long exec_offset); + unsigned long flags; /* * SH7751, SH7751R, and ST40 have no restriction to handle cache. @@ -191,10 +199,12 @@ static inline void flush_cache_4096(unsigned long start, if ((cpu_data->flags & CPU_HAS_P2_FLUSH_BUG) || start < CACHE_OC_ADDRESS_ARRAY) { local_irq_save(flags); - __flush_cache_4096(start | SH_CACHE_ASSOC, P1SEGADDR(phys), 0x20000000); + __flush_cache_4096(start | SH_CACHE_ASSOC, + P1SEGADDR(phys), 0x20000000); local_irq_restore(flags); } else { - __flush_cache_4096(start | SH_CACHE_ASSOC, P1SEGADDR(phys), 0); + __flush_cache_4096(start | SH_CACHE_ASSOC, + P1SEGADDR(phys), 0); } } @@ -231,29 +241,22 @@ static inline void flush_icache_all(void) local_irq_restore(flags); } -void flush_cache_all(void) +void flush_dcache_all(void) { if (cpu_data->dcache.ways == 1) __flush_dcache_all(); else __flush_dcache_all_ex(); +} + +void flush_cache_all(void) +{ + flush_dcache_all(); flush_icache_all(); } void flush_cache_mm(struct mm_struct *mm) { - /* Is there any good way? */ - /* XXX: possibly call flush_cache_range for each vm area */ - /* - * FIXME: Really, the optimal solution here would be able to flush out - * individual lines created by the specified context, but this isn't - * feasible for a number of architectures (such as MIPS, and some - * SPARC) .. is this possible for SuperH? - * - * In the meantime, we'll just flush all of the caches.. this - * seems to be the simplest way to avoid at least a few wasted - * cache flushes. -Lethal - */ flush_cache_all(); } @@ -301,13 +304,30 @@ void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long p = start & PAGE_MASK; pgd_t *dir; pmd_t *pmd; + pud_t *pud; pte_t *pte; pte_t entry; unsigned long phys; unsigned long d = 0; + /* + * Don't bother with the lookup and alias check if we have a + * wide range to cover, just blow away the dcache in its + * entirety instead. -- PFM. + */ + if (((end - start) >> PAGE_SHIFT) >= 64) { + flush_dcache_all(); + + if (vma->vm_flags & VM_EXEC) + flush_icache_all(); + + return; + } + dir = pgd_offset(vma->vm_mm, p); - pmd = pmd_offset(dir, p); + pud = pud_offset(dir, p); + pmd = pmd_offset(pud, p); + end = PAGE_ALIGN(end); do { if (pmd_none(*pmd) || pmd_bad(*pmd)) { @@ -322,7 +342,7 @@ void flush_cache_range(struct vm_area_struct *vma, unsigned long start, if ((pte_val(entry) & _PAGE_PRESENT)) { phys = pte_val(entry)&PTE_PHYS_MASK; if ((p^phys) & CACHE_ALIAS) { - d |= 1 << ((p & CACHE_ALIAS)>>12); + d |= 1 << ((p & CACHE_ALIAS)>>12); d |= 1 << ((phys & CACHE_ALIAS)>>12); if (d == 0x0f) goto loop_exit; |