diff options
Diffstat (limited to 'arch/sh/mm')
| -rw-r--r-- | arch/sh/mm/Kconfig | 19 | ||||
| -rw-r--r-- | arch/sh/mm/Makefile | 3 | ||||
| -rw-r--r-- | arch/sh/mm/cache-sh4.c | 501 | ||||
| -rw-r--r-- | arch/sh/mm/cache-sh5.c | 2 | ||||
| -rw-r--r-- | arch/sh/mm/cache-sh7705.c | 2 | ||||
| -rw-r--r-- | arch/sh/mm/cache.c | 18 | ||||
| -rw-r--r-- | arch/sh/mm/consistent.c | 28 | ||||
| -rw-r--r-- | arch/sh/mm/init.c | 19 | ||||
| -rw-r--r-- | arch/sh/mm/kmap.c | 4 | ||||
| -rw-r--r-- | arch/sh/mm/numa.c | 2 | ||||
| -rw-r--r-- | arch/sh/mm/pmb-fixed.c | 45 | ||||
| -rw-r--r-- | arch/sh/mm/pmb.c | 268 |
12 files changed, 276 insertions, 635 deletions
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig index 7f7b52f9beb..0e7ba8e891c 100644 --- a/arch/sh/mm/Kconfig +++ b/arch/sh/mm/Kconfig @@ -82,8 +82,7 @@ config 32BIT config PMB_ENABLE bool "Support 32-bit physical addressing through PMB" - depends on MMU && EXPERIMENTAL && (CPU_SUBTYPE_SH7757 || CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785) - select 32BIT + depends on MMU && EXPERIMENTAL && CPU_SH4A default y help If you say Y here, physical addressing will be extended to @@ -97,8 +96,7 @@ choice config PMB bool "PMB" - depends on MMU && EXPERIMENTAL && (CPU_SUBTYPE_SH7757 || CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785) - select 32BIT + depends on MMU && EXPERIMENTAL && CPU_SH4A help If you say Y here, physical addressing will be extended to 32-bits through the SH-4A PMB. If this is not set, legacy @@ -106,9 +104,7 @@ config PMB config PMB_FIXED bool "fixed PMB" - depends on MMU && EXPERIMENTAL && (CPU_SUBTYPE_SH7757 || \ - CPU_SUBTYPE_SH7780 || \ - CPU_SUBTYPE_SH7785) + depends on MMU && EXPERIMENTAL && CPU_SH4A select 32BIT help If this option is enabled, fixed PMB mappings are inherited @@ -258,6 +254,15 @@ endchoice source "mm/Kconfig" +config SCHED_MC + bool "Multi-core scheduler support" + depends on SMP + default y + help + Multi-core scheduler support improves the CPU scheduler's decision + making when dealing with multi-core CPU chips at a cost of slightly + increased overhead in some places. If unsure say N here. + endmenu menu "Cache configuration" diff --git a/arch/sh/mm/Makefile b/arch/sh/mm/Makefile index 3759bf85329..8a70535fa7c 100644 --- a/arch/sh/mm/Makefile +++ b/arch/sh/mm/Makefile @@ -33,8 +33,7 @@ obj-y += $(tlb-y) endif obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o -obj-$(CONFIG_PMB) += pmb.o -obj-$(CONFIG_PMB_FIXED) += pmb-fixed.o +obj-$(CONFIG_PMB_ENABLE) += pmb.o obj-$(CONFIG_NUMA) += numa.o # Special flags for fault_64.o. This puts restrictions on the number of diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c index b7f235c74d6..f36a08bf3d5 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 - 2007 Paul Mundt + * Copyright (C) 2001 - 2009 Paul Mundt * Copyright (C) 2003 Richard Curnow * Copyright (c) 2007 STMicroelectronics (R&D) Ltd. * @@ -15,6 +15,8 @@ #include <linux/io.h> #include <linux/mutex.h> #include <linux/fs.h> +#include <linux/highmem.h> +#include <asm/pgtable.h> #include <asm/mmu_context.h> #include <asm/cacheflush.h> @@ -23,21 +25,12 @@ * flushing. Anything exceeding this will simply flush the dcache in its * entirety. */ -#define MAX_DCACHE_PAGES 64 /* XXX: Tune for ways */ #define MAX_ICACHE_PAGES 32 static void __flush_cache_one(unsigned long addr, unsigned long phys, unsigned long exec_offset); /* - * This is initialised here to ensure that it is not placed in the BSS. If - * that were to happen, note that cache_init gets called before the BSS is - * cleared, so this would get nulled out which would be hopeless. - */ -static void (*__flush_dcache_segment_fn)(unsigned long, unsigned long) = - (void (*)(unsigned long, unsigned long))0xdeadbeef; - -/* * Write back the range of D-cache, and purge the I-cache. * * Called from kernel/module.c:sys_init_module and routine for a.out format, @@ -97,15 +90,15 @@ static inline void flush_cache_one(unsigned long start, unsigned long phys) unsigned long flags, exec_offset = 0; /* - * All types of SH-4 require PC to be in P2 to operate on the I-cache. - * Some types of SH-4 require PC to be in P2 to operate on the D-cache. + * All types of SH-4 require PC to be uncached to operate on the I-cache. + * Some types of SH-4 require PC to be uncached to operate on the D-cache. */ if ((boot_cpu_data.flags & CPU_HAS_P2_FLUSH_BUG) || (start < CACHE_OC_ADDRESS_ARRAY)) - exec_offset = 0x20000000; + exec_offset = cached_to_uncached; local_irq_save(flags); - __flush_cache_one(start | SH_CACHE_ASSOC, P1SEGADDR(phys), exec_offset); + __flush_cache_one(start, phys, exec_offset); local_irq_restore(flags); } @@ -124,7 +117,7 @@ static void sh4_flush_dcache_page(void *arg) else #endif { - unsigned long phys = PHYSADDR(page_address(page)); + unsigned long phys = page_to_phys(page); unsigned long addr = CACHE_OC_ADDRESS_ARRAY; int i, n; @@ -159,10 +152,27 @@ static void __uses_jump_to_uncached flush_icache_all(void) local_irq_restore(flags); } -static inline void flush_dcache_all(void) +static void flush_dcache_all(void) { - (*__flush_dcache_segment_fn)(0UL, boot_cpu_data.dcache.way_size); - wmb(); + unsigned long addr, end_addr, entry_offset; + + end_addr = CACHE_OC_ADDRESS_ARRAY + + (current_cpu_data.dcache.sets << + current_cpu_data.dcache.entry_shift) * + current_cpu_data.dcache.ways; + + entry_offset = 1 << current_cpu_data.dcache.entry_shift; + + for (addr = CACHE_OC_ADDRESS_ARRAY; addr < end_addr; ) { + __raw_writel(0, addr); addr += entry_offset; + __raw_writel(0, addr); addr += entry_offset; + __raw_writel(0, addr); addr += entry_offset; + __raw_writel(0, addr); addr += entry_offset; + __raw_writel(0, addr); addr += entry_offset; + __raw_writel(0, addr); addr += entry_offset; + __raw_writel(0, addr); addr += entry_offset; + __raw_writel(0, addr); addr += entry_offset; + } } static void sh4_flush_cache_all(void *unused) @@ -171,89 +181,13 @@ static void sh4_flush_cache_all(void *unused) flush_icache_all(); } -static void __flush_cache_mm(struct mm_struct *mm, unsigned long start, - unsigned long end) -{ - unsigned long d = 0, p = start & PAGE_MASK; - unsigned long alias_mask = boot_cpu_data.dcache.alias_mask; - unsigned long n_aliases = boot_cpu_data.dcache.n_aliases; - unsigned long select_bit; - unsigned long all_aliases_mask; - unsigned long addr_offset; - pgd_t *dir; - pmd_t *pmd; - pud_t *pud; - pte_t *pte; - int i; - - dir = pgd_offset(mm, p); - pud = pud_offset(dir, p); - pmd = pmd_offset(pud, p); - end = PAGE_ALIGN(end); - - all_aliases_mask = (1 << n_aliases) - 1; - - do { - if (pmd_none(*pmd) || unlikely(pmd_bad(*pmd))) { - p &= PMD_MASK; - p += PMD_SIZE; - pmd++; - - continue; - } - - pte = pte_offset_kernel(pmd, p); - - do { - unsigned long phys; - pte_t entry = *pte; - - if (!(pte_val(entry) & _PAGE_PRESENT)) { - pte++; - p += PAGE_SIZE; - continue; - } - - phys = pte_val(entry) & PTE_PHYS_MASK; - - if ((p ^ phys) & alias_mask) { - d |= 1 << ((p & alias_mask) >> PAGE_SHIFT); - d |= 1 << ((phys & alias_mask) >> PAGE_SHIFT); - - if (d == all_aliases_mask) - goto loop_exit; - } - - pte++; - p += PAGE_SIZE; - } while (p < end && ((unsigned long)pte & ~PAGE_MASK)); - pmd++; - } while (p < end); - -loop_exit: - addr_offset = 0; - select_bit = 1; - - for (i = 0; i < n_aliases; i++) { - if (d & select_bit) { - (*__flush_dcache_segment_fn)(addr_offset, PAGE_SIZE); - wmb(); - } - - select_bit <<= 1; - addr_offset += PAGE_SIZE; - } -} - /* * Note : (RPC) since the caches are physically tagged, the only point * of flush_cache_mm for SH-4 is to get rid of aliases from the * D-cache. The assumption elsewhere, e.g. flush_cache_range, is that * lines can stay resident so long as the virtual address they were * accessed with (hence cache set) is in accord with the physical - * address (i.e. tag). It's no different here. So I reckon we don't - * need to flush the I-cache, since aliases don't matter for that. We - * should try that. + * address (i.e. tag). It's no different here. * * Caller takes mm->mmap_sem. */ @@ -264,33 +198,7 @@ static void sh4_flush_cache_mm(void *arg) if (cpu_context(smp_processor_id(), mm) == NO_CONTEXT) return; - /* - * If cache is only 4k-per-way, there are never any 'aliases'. Since - * the cache is physically tagged, the data can just be left in there. - */ - if (boot_cpu_data.dcache.n_aliases == 0) - return; - - /* - * Don't bother groveling around the dcache for the VMA ranges - * if there are too many PTEs to make it worthwhile. - */ - if (mm->nr_ptes >= MAX_DCACHE_PAGES) - flush_dcache_all(); - else { - struct vm_area_struct *vma; - - /* - * In this case there are reasonably sized ranges to flush, - * iterate through the VMA list and take care of any aliases. - */ - for (vma = mm->mmap; vma; vma = vma->vm_next) - __flush_cache_mm(mm, vma->vm_start, vma->vm_end); - } - - /* Only touch the icache if one of the VMAs has VM_EXEC set. */ - if (mm->exec_vm) - flush_icache_all(); + flush_dcache_all(); } /* @@ -303,44 +211,63 @@ static void sh4_flush_cache_page(void *args) { struct flusher_data *data = args; struct vm_area_struct *vma; + struct page *page; unsigned long address, pfn, phys; - unsigned int alias_mask; + int map_coherent = 0; + pgd_t *pgd; + pud_t *pud; + pmd_t *pmd; + pte_t *pte; + void *vaddr; vma = data->vma; - address = data->addr1; + address = data->addr1 & PAGE_MASK; pfn = data->addr2; phys = pfn << PAGE_SHIFT; + page = pfn_to_page(pfn); if (cpu_context(smp_processor_id(), vma->vm_mm) == NO_CONTEXT) return; - alias_mask = boot_cpu_data.dcache.alias_mask; - - /* We only need to flush D-cache when we have alias */ - if ((address^phys) & alias_mask) { - /* Loop 4K of the D-cache */ - flush_cache_one( - CACHE_OC_ADDRESS_ARRAY | (address & alias_mask), - phys); - /* Loop another 4K of the D-cache */ - flush_cache_one( - CACHE_OC_ADDRESS_ARRAY | (phys & alias_mask), - phys); - } + pgd = pgd_offset(vma->vm_mm, address); + pud = pud_offset(pgd, address); + pmd = pmd_offset(pud, address); + pte = pte_offset_kernel(pmd, address); + + /* If the page isn't present, there is nothing to do here. */ + if (!(pte_val(*pte) & _PAGE_PRESENT)) + return; - alias_mask = boot_cpu_data.icache.alias_mask; - if (vma->vm_flags & VM_EXEC) { + if ((vma->vm_mm == current->active_mm)) + vaddr = NULL; + else { /* - * Evict entries from the portion of the cache from which code - * may have been executed at this address (virtual). There's - * no need to evict from the portion corresponding to the - * physical address as for the D-cache, because we know the - * kernel has never executed the code through its identity - * translation. + * Use kmap_coherent or kmap_atomic to do flushes for + * another ASID than the current one. */ - flush_cache_one( - CACHE_IC_ADDRESS_ARRAY | (address & alias_mask), - phys); + map_coherent = (current_cpu_data.dcache.n_aliases && + !test_bit(PG_dcache_dirty, &page->flags) && + page_mapped(page)); + if (map_coherent) + vaddr = kmap_coherent(page, address); + else + vaddr = kmap_atomic(page, KM_USER0); + + address = (unsigned long)vaddr; + } + + if (pages_do_alias(address, phys)) + flush_cache_one(CACHE_OC_ADDRESS_ARRAY | + (address & shm_align_mask), phys); + + if (vma->vm_flags & VM_EXEC) + flush_icache_all(); + + if (vaddr) { + if (map_coherent) + kunmap_coherent(vaddr); + else + kunmap_atomic(vaddr, KM_USER0); } } @@ -373,24 +300,10 @@ static void sh4_flush_cache_range(void *args) if (boot_cpu_data.dcache.n_aliases == 0) return; - /* - * 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) >= MAX_DCACHE_PAGES) - flush_dcache_all(); - else - __flush_cache_mm(vma->vm_mm, start, end); + flush_dcache_all(); - if (vma->vm_flags & VM_EXEC) { - /* - * TODO: Is this required??? Need to look at how I-cache - * coherency is assured when new programs are loaded to see if - * this matters. - */ + if (vma->vm_flags & VM_EXEC) flush_icache_all(); - } } /** @@ -464,245 +377,6 @@ static void __flush_cache_one(unsigned long addr, unsigned long phys, } while (--way_count != 0); } -/* - * Break the 1, 2 and 4 way variants of this out into separate functions to - * avoid nearly all the overhead of having the conditional stuff in the function - * bodies (+ the 1 and 2 way cases avoid saving any registers too). - * - * We want to eliminate unnecessary bus transactions, so this code uses - * a non-obvious technique. - * - * Loop over a cache way sized block of, one cache line at a time. For each - * line, use movca.a to cause the current cache line contents to be written - * back, but without reading anything from main memory. However this has the - * side effect that the cache is now caching that memory location. So follow - * this with a cache invalidate to mark the cache line invalid. And do all - * this with interrupts disabled, to avoid the cache line being accidently - * evicted while it is holding garbage. - * - * This also breaks in a number of circumstances: - * - if there are modifications to the region of memory just above - * empty_zero_page (for example because a breakpoint has been placed - * there), then these can be lost. - * - * This is because the the memory address which the cache temporarily - * caches in the above description is empty_zero_page. So the - * movca.l hits the cache (it is assumed that it misses, or at least - * isn't dirty), modifies the line and then invalidates it, losing the - * required change. - * - * - If caches are disabled or configured in write-through mode, then - * the movca.l writes garbage directly into memory. - */ -static void __flush_dcache_segment_writethrough(unsigned long start, - unsigned long extent_per_way) -{ - unsigned long addr; - int i; - - addr = CACHE_OC_ADDRESS_ARRAY | (start & cpu_data->dcache.entry_mask); - - while (extent_per_way) { - for (i = 0; i < cpu_data->dcache.ways; i++) - __raw_writel(0, addr + cpu_data->dcache.way_incr * i); - - addr += cpu_data->dcache.linesz; - extent_per_way -= cpu_data->dcache.linesz; - } -} - -static void __flush_dcache_segment_1way(unsigned long start, - unsigned long extent_per_way) -{ - unsigned long orig_sr, sr_with_bl; - unsigned long base_addr; - unsigned long way_incr, linesz, way_size; - struct cache_info *dcache; - register unsigned long a0, a0e; - - asm volatile("stc sr, %0" : "=r" (orig_sr)); - sr_with_bl = orig_sr | (1<<28); - base_addr = ((unsigned long)&empty_zero_page[0]); - - /* - * The previous code aligned base_addr to 16k, i.e. the way_size of all - * existing SH-4 D-caches. Whilst I don't see a need to have this - * aligned to any better than the cache line size (which it will be - * anyway by construction), let's align it to at least the way_size of - * any existing or conceivable SH-4 D-cache. -- RPC - */ - base_addr = ((base_addr >> 16) << 16); - base_addr |= start; - - dcache = &boot_cpu_data.dcache; - linesz = dcache->linesz; - way_incr = dcache->way_incr; - way_size = dcache->way_size; - - a0 = base_addr; - a0e = base_addr + extent_per_way; - do { - asm volatile("ldc %0, sr" : : "r" (sr_with_bl)); - asm volatile("movca.l r0, @%0\n\t" - "ocbi @%0" : : "r" (a0)); - a0 += linesz; - asm volatile("movca.l r0, @%0\n\t" - "ocbi @%0" : : "r" (a0)); - a0 += linesz; - asm volatile("movca.l r0, @%0\n\t" - "ocbi @%0" : : "r" (a0)); - a0 += linesz; - asm volatile("movca.l r0, @%0\n\t" - "ocbi @%0" : : "r" (a0)); - asm volatile("ldc %0, sr" : : "r" (orig_sr)); - a0 += linesz; - } while (a0 < a0e); -} - -static void __flush_dcache_segment_2way(unsigned long start, - unsigned long extent_per_way) -{ - unsigned long orig_sr, sr_with_bl; - unsigned long base_addr; - unsigned long way_incr, linesz, way_size; - struct cache_info *dcache; - register unsigned long a0, a1, a0e; - - asm volatile("stc sr, %0" : "=r" (orig_sr)); - sr_with_bl = orig_sr | (1<<28); - base_addr = ((unsigned long)&empty_zero_page[0]); - - /* See comment under 1-way above */ - base_addr = ((base_addr >> 16) << 16); - base_addr |= start; - - dcache = &boot_cpu_data.dcache; - linesz = dcache->linesz; - way_incr = dcache->way_incr; - way_size = dcache->way_size; - - a0 = base_addr; - a1 = a0 + way_incr; - a0e = base_addr + extent_per_way; - do { - asm volatile("ldc %0, sr" : : "r" (sr_with_bl)); - asm volatile("movca.l r0, @%0\n\t" - "movca.l r0, @%1\n\t" - "ocbi @%0\n\t" - "ocbi @%1" : : - "r" (a0), "r" (a1)); - a0 += linesz; - a1 += linesz; - asm volatile("movca.l r0, @%0\n\t" - "movca.l r0, @%1\n\t" - "ocbi @%0\n\t" - "ocbi @%1" : : - "r" (a0), "r" (a1)); - a0 += linesz; - a1 += linesz; - asm volatile("movca.l r0, @%0\n\t" - "movca.l r0, @%1\n\t" - "ocbi @%0\n\t" - "ocbi @%1" : : - "r" (a0), "r" (a1)); - a0 += linesz; - a1 += linesz; - asm volatile("movca.l r0, @%0\n\t" - "movca.l r0, @%1\n\t" - "ocbi @%0\n\t" - "ocbi @%1" : : - "r" (a0), "r" (a1)); - asm volatile("ldc %0, sr" : : "r" (orig_sr)); - a0 += linesz; - a1 += linesz; - } while (a0 < a0e); -} - -static void __flush_dcache_segment_4way(unsigned long start, - unsigned long extent_per_way) -{ - unsigned long orig_sr, sr_with_bl; - unsigned long base_addr; - unsigned long way_incr, linesz, way_size; - struct cache_info *dcache; - register unsigned long a0, a1, a2, a3, a0e; - - asm volatile("stc sr, %0" : "=r" (orig_sr)); - sr_with_bl = orig_sr | (1<<28); - base_addr = ((unsigned long)&empty_zero_page[0]); - - /* See comment under 1-way above */ - base_addr = ((base_addr >> 16) << 16); - base_addr |= start; - - dcache = &boot_cpu_data.dcache; - linesz = dcache->linesz; - way_incr = dcache->way_incr; - way_size = dcache->way_size; - - a0 = base_addr; - a1 = a0 + way_incr; - a2 = a1 + way_incr; - a3 = a2 + way_incr; - a0e = base_addr + extent_per_way; - do { - asm volatile("ldc %0, sr" : : "r" (sr_with_bl)); - asm volatile("movca.l r0, @%0\n\t" - "movca.l r0, @%1\n\t" - "movca.l r0, @%2\n\t" - "movca.l r0, @%3\n\t" - "ocbi @%0\n\t" - "ocbi @%1\n\t" - "ocbi @%2\n\t" - "ocbi @%3\n\t" : : - "r" (a0), "r" (a1), "r" (a2), "r" (a3)); - a0 += linesz; - a1 += linesz; - a2 += linesz; - a3 += linesz; - asm volatile("movca.l r0, @%0\n\t" - "movca.l r0, @%1\n\t" - "movca.l r0, @%2\n\t" - "movca.l r0, @%3\n\t" - "ocbi @%0\n\t" - "ocbi @%1\n\t" - "ocbi @%2\n\t" - "ocbi @%3\n\t" : : - "r" (a0), "r" (a1), "r" (a2), "r" (a3)); - a0 += linesz; - a1 += linesz; - a2 += linesz; - a3 += linesz; - asm volatile("movca.l r0, @%0\n\t" - "movca.l r0, @%1\n\t" - "movca.l r0, @%2\n\t" - "movca.l r0, @%3\n\t" - "ocbi @%0\n\t" - "ocbi @%1\n\t" - "ocbi @%2\n\t" - "ocbi @%3\n\t" : : - "r" (a0), "r" (a1), "r" (a2), "r" (a3)); - a0 += linesz; - a1 += linesz; - a2 += linesz; - a3 += linesz; - asm volatile("movca.l r0, @%0\n\t" - "movca.l r0, @%1\n\t" - "movca.l r0, @%2\n\t" - "movca.l r0, @%3\n\t" - "ocbi @%0\n\t" - "ocbi @%1\n\t" - "ocbi @%2\n\t" - "ocbi @%3\n\t" : : - "r" (a0), "r" (a1), "r" (a2), "r" (a3)); - asm volatile("ldc %0, sr" : : "r" (orig_sr)); - a0 += linesz; - a1 += linesz; - a2 += linesz; - a3 += linesz; - } while (a0 < a0e); -} - extern void __weak sh4__flush_region_init(void); /* @@ -710,32 +384,11 @@ extern void __weak sh4__flush_region_init(void); */ void __init sh4_cache_init(void) { - unsigned int wt_enabled = !!(__raw_readl(CCR) & CCR_CACHE_WT); - printk("PVR=%08x CVR=%08x PRR=%08x\n", ctrl_inl(CCN_PVR), ctrl_inl(CCN_CVR), ctrl_inl(CCN_PRR)); - if (wt_enabled) - __flush_dcache_segment_fn = __flush_dcache_segment_writethrough; - else { - switch (boot_cpu_data.dcache.ways) { - case 1: - __flush_dcache_segment_fn = __flush_dcache_segment_1way; - break; - case 2: - __flush_dcache_segment_fn = __flush_dcache_segment_2way; - break; - case 4: - __flush_dcache_segment_fn = __flush_dcache_segment_4way; - break; - default: - panic("unknown number of cache ways\n"); - break; - } - } - local_flush_icache_range = sh4_flush_icache_range; local_flush_dcache_page = sh4_flush_dcache_page; local_flush_cache_all = sh4_flush_cache_all; diff --git a/arch/sh/mm/cache-sh5.c b/arch/sh/mm/cache-sh5.c index 467ff8e260f..eb4cc4ec795 100644 --- a/arch/sh/mm/cache-sh5.c +++ b/arch/sh/mm/cache-sh5.c @@ -563,7 +563,7 @@ static void sh5_flush_cache_page(void *args) static void sh5_flush_dcache_page(void *page) { - sh64_dcache_purge_phy_page(page_to_phys(page)); + sh64_dcache_purge_phy_page(page_to_phys((struct page *)page)); wmb(); } diff --git a/arch/sh/mm/cache-sh7705.c b/arch/sh/mm/cache-sh7705.c index 2601935eb58..f527fb70fce 100644 --- a/arch/sh/mm/cache-sh7705.c +++ b/arch/sh/mm/cache-sh7705.c @@ -141,7 +141,7 @@ static void sh7705_flush_dcache_page(void *arg) if (mapping && !mapping_mapped(mapping)) set_bit(PG_dcache_dirty, &page->flags); else - __flush_dcache_page(PHYSADDR(page_address(page))); + __flush_dcache_page(__pa(page_address(page))); } static void __uses_jump_to_uncached sh7705_flush_cache_all(void *args) diff --git a/arch/sh/mm/cache.c b/arch/sh/mm/cache.c index a2dc7f9ecc5..e9415d3ea94 100644 --- a/arch/sh/mm/cache.c +++ b/arch/sh/mm/cache.c @@ -27,8 +27,11 @@ 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); +EXPORT_SYMBOL(__flush_wback_region); void (*__flush_purge_region)(void *start, int size); +EXPORT_SYMBOL(__flush_purge_region); void (*__flush_invalidate_region)(void *start, int size); +EXPORT_SYMBOL(__flush_invalidate_region); static inline void noop__flush_region(void *start, int size) { @@ -161,14 +164,21 @@ void flush_cache_all(void) { cacheop_on_each_cpu(local_flush_cache_all, NULL, 1); } +EXPORT_SYMBOL(flush_cache_all); void flush_cache_mm(struct mm_struct *mm) { + if (boot_cpu_data.dcache.n_aliases == 0) + return; + cacheop_on_each_cpu(local_flush_cache_mm, mm, 1); } void flush_cache_dup_mm(struct mm_struct *mm) { + if (boot_cpu_data.dcache.n_aliases == 0) + return; + cacheop_on_each_cpu(local_flush_cache_dup_mm, mm, 1); } @@ -195,11 +205,13 @@ void flush_cache_range(struct vm_area_struct *vma, unsigned long start, cacheop_on_each_cpu(local_flush_cache_range, (void *)&data, 1); } +EXPORT_SYMBOL(flush_cache_range); void flush_dcache_page(struct page *page) { cacheop_on_each_cpu(local_flush_dcache_page, page, 1); } +EXPORT_SYMBOL(flush_dcache_page); void flush_icache_range(unsigned long start, unsigned long end) { @@ -265,7 +277,11 @@ static void __init emit_cache_params(void) void __init cpu_cache_init(void) { - unsigned int cache_disabled = !(__raw_readl(CCR) & CCR_CACHE_ENABLE); + unsigned int cache_disabled = 0; + +#ifdef CCR + cache_disabled = !(__raw_readl(CCR) & CCR_CACHE_ENABLE); +#endif compute_alias(&boot_cpu_data.icache); compute_alias(&boot_cpu_data.dcache); diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c index e098ec158dd..902967e3f84 100644 --- a/arch/sh/mm/consistent.c +++ b/arch/sh/mm/consistent.c @@ -15,11 +15,15 @@ #include <linux/dma-mapping.h> #include <linux/dma-debug.h> #include <linux/io.h> +#include <linux/module.h> #include <asm/cacheflush.h> #include <asm/addrspace.h> #define PREALLOC_DMA_DEBUG_ENTRIES 4096 +struct dma_map_ops *dma_ops; +EXPORT_SYMBOL(dma_ops); + static int __init dma_init(void) { dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES); @@ -27,15 +31,12 @@ static int __init dma_init(void) } fs_initcall(dma_init); -void *dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp) +void *dma_generic_alloc_coherent(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp) { void *ret, *ret_nocache; int order = get_order(size); - if (dma_alloc_from_coherent(dev, size, dma_handle, &ret)) - return ret; - ret = (void *)__get_free_pages(gfp, order); if (!ret) return NULL; @@ -57,35 +58,26 @@ void *dma_alloc_coherent(struct device *dev, size_t size, *dma_handle = virt_to_phys(ret); - debug_dma_alloc_coherent(dev, size, *dma_handle, ret_nocache); - return ret_nocache; } -EXPORT_SYMBOL(dma_alloc_coherent); -void dma_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle) +void dma_generic_free_coherent(struct device *dev, size_t size, + void *vaddr, dma_addr_t dma_handle) { int order = get_order(size); unsigned long pfn = dma_handle >> PAGE_SHIFT; int k; - WARN_ON(irqs_disabled()); /* for portability */ - - if (dma_release_from_coherent(dev, order, vaddr)) - return; - - debug_dma_free_coherent(dev, size, vaddr, dma_handle); for (k = 0; k < (1 << order); k++) __free_pages(pfn_to_page(pfn + k), 0); + iounmap(vaddr); } -EXPORT_SYMBOL(dma_free_coherent); void dma_cache_sync(struct device *dev, void *vaddr, size_t size, enum dma_data_direction direction) { -#ifdef CONFIG_CPU_SH5 +#if defined(CONFIG_CPU_SH5) || defined(CONFIG_PMB) void *p1addr = vaddr; #else void *p1addr = (void*) P1SEGADDR((unsigned long)vaddr); diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index 8173e38afd3..432acd07e76 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -15,6 +15,7 @@ #include <linux/pagemap.h> #include <linux/percpu.h> #include <linux/io.h> +#include <linux/dma-mapping.h> #include <asm/mmu_context.h> #include <asm/tlb.h> #include <asm/cacheflush.h> @@ -186,11 +187,21 @@ void __init paging_init(void) set_fixmap_nocache(FIX_UNCACHED, __pa(&__uncached_start)); } +/* + * Early initialization for any I/O MMUs we might have. + */ +static void __init iommu_init(void) +{ + no_iommu_init(); +} + void __init mem_init(void) { int codesize, datasize, initsize; int nid; + iommu_init(); + num_physpages = 0; high_memory = NULL; @@ -323,4 +334,12 @@ int memory_add_physaddr_to_nid(u64 addr) } EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid); #endif + #endif /* CONFIG_MEMORY_HOTPLUG */ + +#ifdef CONFIG_PMB +int __in_29bit_mode(void) +{ + return !(ctrl_inl(PMB_PASCR) & PASCR_SE); +} +#endif /* CONFIG_PMB */ diff --git a/arch/sh/mm/kmap.c b/arch/sh/mm/kmap.c index 16e01b5fed0..15d74ea4209 100644 --- a/arch/sh/mm/kmap.c +++ b/arch/sh/mm/kmap.c @@ -39,7 +39,9 @@ void *kmap_coherent(struct page *page, unsigned long addr) pagefault_disable(); idx = FIX_CMAP_END - - ((addr & current_cpu_data.dcache.alias_mask) >> PAGE_SHIFT); + (((addr >> PAGE_SHIFT) & (FIX_N_COLOURS - 1)) + + (FIX_N_COLOURS * smp_processor_id())); + vaddr = __fix_to_virt(idx); BUG_ON(!pte_none(*(kmap_coherent_pte - idx))); diff --git a/arch/sh/mm/numa.c b/arch/sh/mm/numa.c index 9b784fdb947..6c524446c0f 100644 --- a/arch/sh/mm/numa.c +++ b/arch/sh/mm/numa.c @@ -60,7 +60,7 @@ void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end) unsigned long bootmem_paddr; /* Don't allow bogus node assignment */ - BUG_ON(nid > MAX_NUMNODES || nid == 0); + BUG_ON(nid > MAX_NUMNODES || nid <= 0); start_pfn = start >> PAGE_SHIFT; end_pfn = end >> PAGE_SHIFT; diff --git a/arch/sh/mm/pmb-fixed.c b/arch/sh/mm/pmb-fixed.c deleted file mode 100644 index 43c8eac4d8a..00000000000 --- a/arch/sh/mm/pmb-fixed.c +++ /dev/null @@ -1,45 +0,0 @@ -/* - * arch/sh/mm/fixed_pmb.c - * - * Copyright (C) 2009 Renesas Solutions Corp. - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ -#include <linux/init.h> -#include <linux/mm.h> -#include <linux/io.h> -#include <asm/mmu.h> -#include <asm/mmu_context.h> - -static int __uses_jump_to_uncached fixed_pmb_init(void) -{ - int i; - unsigned long addr, data; - - jump_to_uncached(); - - for (i = 0; i < PMB_ENTRY_MAX; i++) { - addr = PMB_DATA + (i << PMB_E_SHIFT); - data = ctrl_inl(addr); - if (!(data & PMB_V)) - continue; - - if (data & PMB_C) { -#if defined(CONFIG_CACHE_WRITETHROUGH) - data |= PMB_WT; -#elif defined(CONFIG_CACHE_WRITEBACK) - data &= ~PMB_WT; -#else - data &= ~(PMB_C | PMB_WT); -#endif - } - ctrl_outl(data, addr); - } - - back_to_cached(); - - return 0; -} -arch_initcall(fixed_pmb_init); diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c index aade3110211..280f6a16603 100644 --- a/arch/sh/mm/pmb.c +++ b/arch/sh/mm/pmb.c @@ -35,29 +35,9 @@ static void __pmb_unmap(struct pmb_entry *); -static struct kmem_cache *pmb_cache; +static struct pmb_entry pmb_entry_list[NR_PMB_ENTRIES]; static unsigned long pmb_map; -static struct pmb_entry pmb_init_map[] = { - /* vpn ppn flags (ub/sz/c/wt) */ - - /* P1 Section Mappings */ - { 0x80000000, 0x00000000, PMB_SZ_64M | PMB_C, }, - { 0x84000000, 0x04000000, PMB_SZ_64M | PMB_C, }, - { 0x88000000, 0x08000000, PMB_SZ_128M | PMB_C, }, - { 0x90000000, 0x10000000, PMB_SZ_64M | PMB_C, }, - { 0x94000000, 0x14000000, PMB_SZ_64M | PMB_C, }, - { 0x98000000, 0x18000000, PMB_SZ_64M | PMB_C, }, - - /* P2 Section Mappings */ - { 0xa0000000, 0x00000000, PMB_UB | PMB_SZ_64M | PMB_WT, }, - { 0xa4000000, 0x04000000, PMB_UB | PMB_SZ_64M | PMB_WT, }, - { 0xa8000000, 0x08000000, PMB_UB | PMB_SZ_128M | PMB_WT, }, - { 0xb0000000, 0x10000000, PMB_UB | PMB_SZ_64M | PMB_WT, }, - { 0xb4000000, 0x14000000, PMB_UB | PMB_SZ_64M | PMB_WT, }, - { 0xb8000000, 0x18000000, PMB_UB | PMB_SZ_64M | PMB_WT, }, -}; - static inline unsigned long mk_pmb_entry(unsigned int entry) { return (entry & PMB_E_MASK) << PMB_E_SHIFT; @@ -73,81 +53,68 @@ static inline unsigned long mk_pmb_data(unsigned int entry) return mk_pmb_entry(entry) | PMB_DATA; } -static DEFINE_SPINLOCK(pmb_list_lock); -static struct pmb_entry *pmb_list; - -static inline void pmb_list_add(struct pmb_entry *pmbe) +static int pmb_alloc_entry(void) { - struct pmb_entry **p, *tmp; + unsigned int pos; - p = &pmb_list; - while ((tmp = *p) != NULL) - p = &tmp->next; +repeat: + pos = find_first_zero_bit(&pmb_map, NR_PMB_ENTRIES); - pmbe->next = tmp; - *p = pmbe; -} + if (unlikely(pos > NR_PMB_ENTRIES)) + return -ENOSPC; -static inline void pmb_list_del(struct pmb_entry *pmbe) -{ - struct pmb_entry **p, *tmp; + if (test_and_set_bit(pos, &pmb_map)) + goto repeat; - for (p = &pmb_list; (tmp = *p); p = &tmp->next) - if (tmp == pmbe) { - *p = tmp->next; - return; - } + return pos; } -struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn, - unsigned long flags) +static struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn, + unsigned long flags, int entry) { struct pmb_entry *pmbe; + int pos; + + if (entry == PMB_NO_ENTRY) { + pos = pmb_alloc_entry(); + if (pos < 0) + return ERR_PTR(pos); + } else { + if (test_bit(entry, &pmb_map)) + return ERR_PTR(-ENOSPC); + pos = entry; + } - pmbe = kmem_cache_alloc(pmb_cache, GFP_KERNEL); + pmbe = &pmb_entry_list[pos]; if (!pmbe) return ERR_PTR(-ENOMEM); pmbe->vpn = vpn; pmbe->ppn = ppn; pmbe->flags = flags; - - spin_lock_irq(&pmb_list_lock); - pmb_list_add(pmbe); - spin_unlock_irq(&pmb_list_lock); + pmbe->entry = pos; return pmbe; } -void pmb_free(struct pmb_entry *pmbe) +static void pmb_free(struct pmb_entry *pmbe) { - spin_lock_irq(&pmb_list_lock); - pmb_list_del(pmbe); - spin_unlock_irq(&pmb_list_lock); + int pos = pmbe->entry; - kmem_cache_free(pmb_cache, pmbe); + pmbe->vpn = 0; + pmbe->ppn = 0; + pmbe->flags = 0; + pmbe->entry = 0; + + clear_bit(pos, &pmb_map); } /* * Must be in P2 for __set_pmb_entry() */ -int __set_pmb_entry(unsigned long vpn, unsigned long ppn, - unsigned long flags, int *entry) +static void __set_pmb_entry(unsigned long vpn, unsigned long ppn, + unsigned long flags, int pos) { - unsigned int pos = *entry; - - if (unlikely(pos == PMB_NO_ENTRY)) - pos = find_first_zero_bit(&pmb_map, NR_PMB_ENTRIES); - -repeat: - if (unlikely(pos > NR_PMB_ENTRIES)) - return -ENOSPC; - - if (test_and_set_bit(pos, &pmb_map)) { - pos = find_first_zero_bit(&pmb_map, NR_PMB_ENTRIES); - goto repeat; - } - ctrl_outl(vpn | PMB_V, mk_pmb_addr(pos)); #ifdef CONFIG_CACHE_WRITETHROUGH @@ -161,35 +128,21 @@ repeat: #endif ctrl_outl(ppn | flags | PMB_V, mk_pmb_data(pos)); - - *entry = pos; - - return 0; } -int __uses_jump_to_uncached set_pmb_entry(struct pmb_entry *pmbe) +static void __uses_jump_to_uncached set_pmb_entry(struct pmb_entry *pmbe) { - int ret; - jump_to_uncached(); - ret = __set_pmb_entry(pmbe->vpn, pmbe->ppn, pmbe->flags, &pmbe->entry); + __set_pmb_entry(pmbe->vpn, pmbe->ppn, pmbe->flags, pmbe->entry); back_to_cached(); - - return ret; } -void __uses_jump_to_uncached clear_pmb_entry(struct pmb_entry *pmbe) +static void __uses_jump_to_uncached clear_pmb_entry(struct pmb_entry *pmbe) { unsigned int entry = pmbe->entry; unsigned long addr; - /* - * Don't allow clearing of wired init entries, P1 or P2 access - * without a corresponding mapping in the PMB will lead to reset - * by the TLB. - */ - if (unlikely(entry < ARRAY_SIZE(pmb_init_map) || - entry >= NR_PMB_ENTRIES)) + if (unlikely(entry >= NR_PMB_ENTRIES)) return; jump_to_uncached(); @@ -202,8 +155,6 @@ void __uses_jump_to_uncached clear_pmb_entry(struct pmb_entry *pmbe) ctrl_outl(ctrl_inl(addr) & ~PMB_V, addr); back_to_cached(); - - clear_bit(entry, &pmb_map); } @@ -239,23 +190,17 @@ long pmb_remap(unsigned long vaddr, unsigned long phys, again: for (i = 0; i < ARRAY_SIZE(pmb_sizes); i++) { - int ret; - if (size < pmb_sizes[i].size) continue; - pmbe = pmb_alloc(vaddr, phys, pmb_flags | pmb_sizes[i].flag); + pmbe = pmb_alloc(vaddr, phys, pmb_flags | pmb_sizes[i].flag, + PMB_NO_ENTRY); if (IS_ERR(pmbe)) { err = PTR_ERR(pmbe); goto out; } - ret = set_pmb_entry(pmbe); - if (ret != 0) { - pmb_free(pmbe); - err = -EBUSY; - goto out; - } + set_pmb_entry(pmbe); phys += pmb_sizes[i].size; vaddr += pmb_sizes[i].size; @@ -292,11 +237,16 @@ out: void pmb_unmap(unsigned long addr) { - struct pmb_entry **p, *pmbe; + struct pmb_entry *pmbe = NULL; + int i; - for (p = &pmb_list; (pmbe = *p); p = &pmbe->next) - if (pmbe->vpn == addr) - break; + for (i = 0; i < ARRAY_SIZE(pmb_entry_list); i++) { + if (test_bit(i, &pmb_map)) { + pmbe = &pmb_entry_list[i]; + if (pmbe->vpn == addr) + break; + } + } if (unlikely(!pmbe)) return; @@ -306,13 +256,22 @@ void pmb_unmap(unsigned long addr) static void __pmb_unmap(struct pmb_entry *pmbe) { - WARN_ON(!test_bit(pmbe->entry, &pmb_map)); + BUG_ON(!test_bit(pmbe->entry, &pmb_map)); do { struct pmb_entry *pmblink = pmbe; - if (pmbe->entry != PMB_NO_ENTRY) - clear_pmb_entry(pmbe); + /* + * We may be called before this pmb_entry has been + * entered into the PMB table via set_pmb_entry(), but + * that's OK because we've allocated a unique slot for + * this entry in pmb_alloc() (even if we haven't filled + * it yet). + * + * Therefore, calling clear_pmb_entry() is safe as no + * other mapping can be using that slot. + */ + clear_pmb_entry(pmbe); pmbe = pmblink->link; @@ -320,42 +279,34 @@ static void __pmb_unmap(struct pmb_entry *pmbe) } while (pmbe); } -static void pmb_cache_ctor(void *pmb) +#ifdef CONFIG_PMB +int __uses_jump_to_uncached pmb_init(void) { - struct pmb_entry *pmbe = pmb; - - memset(pmb, 0, sizeof(struct pmb_entry)); - - pmbe->entry = PMB_NO_ENTRY; -} - -static int __uses_jump_to_uncached pmb_init(void) -{ - unsigned int nr_entries = ARRAY_SIZE(pmb_init_map); - unsigned int entry, i; - - BUG_ON(unlikely(nr_entries >= NR_PMB_ENTRIES)); - - pmb_cache = kmem_cache_create("pmb", sizeof(struct pmb_entry), 0, - SLAB_PANIC, pmb_cache_ctor); + unsigned int i; + long size, ret; jump_to_uncached(); /* - * Ordering is important, P2 must be mapped in the PMB before we - * can set PMB.SE, and P1 must be mapped before we jump back to - * P1 space. + * Insert PMB entries for the P1 and P2 areas so that, after + * we've switched the MMU to 32-bit mode, the semantics of P1 + * and P2 are the same as in 29-bit mode, e.g. + * + * P1 - provides a cached window onto physical memory + * P2 - provides an uncached window onto physical memory */ - for (entry = 0; entry < nr_entries; entry++) { - struct pmb_entry *pmbe = pmb_init_map + entry; + size = __MEMORY_START + __MEMORY_SIZE; - __set_pmb_entry(pmbe->vpn, pmbe->ppn, pmbe->flags, &entry); - } + ret = pmb_remap(P1SEG, 0x00000000, size, PMB_C); + BUG_ON(ret != size); + + ret = pmb_remap(P2SEG, 0x00000000, size, PMB_WT | PMB_UB); + BUG_ON(ret != size); ctrl_outl(0, PMB_IRMCR); /* PMB.SE and UB[7] */ - ctrl_outl((1 << 31) | (1 << 7), PMB_PASCR); + ctrl_outl(PASCR_SE | (1 << 7), PMB_PASCR); /* Flush out the TLB */ i = ctrl_inl(MMUCR); @@ -366,7 +317,53 @@ static int __uses_jump_to_uncached pmb_init(void) return 0; } -arch_initcall(pmb_init); +#else +int __uses_jump_to_uncached pmb_init(void) +{ + int i; + unsigned long addr, data; + + jump_to_uncached(); + + for (i = 0; i < PMB_ENTRY_MAX; i++) { + struct pmb_entry *pmbe; + unsigned long vpn, ppn, flags; + + addr = PMB_DATA + (i << PMB_E_SHIFT); + data = ctrl_inl(addr); + if (!(data & PMB_V)) + continue; + + if (data & PMB_C) { +#if defined(CONFIG_CACHE_WRITETHROUGH) + data |= PMB_WT; +#elif defined(CONFIG_CACHE_WRITEBACK) + data &= ~PMB_WT; +#else + data &= ~(PMB_C | PMB_WT); +#endif + } + ctrl_outl(data, addr); + + ppn = data & PMB_PFN_MASK; + + flags = data & (PMB_C | PMB_WT | PMB_UB); + flags |= data & PMB_SZ_MASK; + + addr = PMB_ADDR + (i << PMB_E_SHIFT); + data = ctrl_inl(addr); + + vpn = data & PMB_PFN_MASK; + + pmbe = pmb_alloc(vpn, ppn, flags, i); + WARN_ON(IS_ERR(pmbe)); + } + + back_to_cached(); + + return 0; +} +#endif /* CONFIG_PMB */ static int pmb_seq_show(struct seq_file *file, void *iter) { @@ -434,15 +431,18 @@ postcore_initcall(pmb_debugfs_init); static int pmb_sysdev_suspend(struct sys_device *dev, pm_message_t state) { static pm_message_t prev_state; + int i; /* Restore the PMB after a resume from hibernation */ if (state.event == PM_EVENT_ON && prev_state.event == PM_EVENT_FREEZE) { struct pmb_entry *pmbe; - spin_lock_irq(&pmb_list_lock); - for (pmbe = pmb_list; pmbe; pmbe = pmbe->next) - set_pmb_entry(pmbe); - spin_unlock_irq(&pmb_list_lock); + for (i = 0; i < ARRAY_SIZE(pmb_entry_list); i++) { + if (test_bit(i, &pmb_map)) { + pmbe = &pmb_entry_list[i]; + set_pmb_entry(pmbe); + } + } } prev_state = state; return 0; |