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-rw-r--r--arch/sh/mm/Kconfig22
-rw-r--r--arch/sh/mm/Makefile3
-rw-r--r--arch/sh/mm/cache-sh4.c519
-rw-r--r--arch/sh/mm/cache-sh5.c2
-rw-r--r--arch/sh/mm/cache-sh7705.c2
-rw-r--r--arch/sh/mm/cache.c36
-rw-r--r--arch/sh/mm/consistent.c28
-rw-r--r--arch/sh/mm/init.c19
-rw-r--r--arch/sh/mm/ioremap_32.c10
-rw-r--r--arch/sh/mm/ioremap_64.c6
-rw-r--r--arch/sh/mm/kmap.c4
-rw-r--r--arch/sh/mm/mmap.c3
-rw-r--r--arch/sh/mm/numa.c17
-rw-r--r--arch/sh/mm/pmb-fixed.c45
-rw-r--r--arch/sh/mm/pmb.c268
15 files changed, 320 insertions, 664 deletions
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 64dc1ad59801..986a71b88ca3 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -82,9 +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
- default y
+ depends on MMU && EXPERIMENTAL && CPU_SH4A && !CPU_SH4AL_DSP
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
@@ -97,8 +95,7 @@ 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 && !CPU_SH4AL_DSP
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 +103,7 @@ 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 && !CPU_SH4AL_DSP
select 32BIT
help
If this option is enabled, fixed PMB mappings are inherited
@@ -227,7 +222,7 @@ endchoice
choice
prompt "HugeTLB page size"
- depends on HUGETLB_PAGE && (CPU_SH4 || CPU_SH5) && MMU
+ depends on HUGETLB_PAGE
default HUGETLB_PAGE_SIZE_1MB if PAGE_SIZE_64KB
default HUGETLB_PAGE_SIZE_64K
@@ -258,6 +253,15 @@ 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 3759bf853293..8a70535fa7ce 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 a98c7d8984fa..560ddb6bc8a7 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_4096(unsigned long addr, unsigned long phys,
+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,
@@ -72,6 +65,7 @@ static void __uses_jump_to_uncached sh4_flush_icache_range(void *args)
for (v = start; v < end; v += L1_CACHE_BYTES) {
unsigned long icacheaddr;
+ int j, n;
__ocbwb(v);
@@ -79,8 +73,10 @@ static void __uses_jump_to_uncached sh4_flush_icache_range(void *args)
cpu_data->icache.entry_mask);
/* Clear i-cache line valid-bit */
+ n = boot_cpu_data.icache.n_aliases;
for (i = 0; i < cpu_data->icache.ways; i++) {
- __raw_writel(0, icacheaddr);
+ for (j = 0; j < n; j++)
+ __raw_writel(0, icacheaddr + (j * PAGE_SIZE));
icacheaddr += cpu_data->icache.way_incr;
}
}
@@ -89,22 +85,20 @@ static void __uses_jump_to_uncached sh4_flush_icache_range(void *args)
local_irq_restore(flags);
}
-static inline void flush_cache_4096(unsigned long start,
- unsigned long phys)
+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_4096(start | SH_CACHE_ASSOC,
- P1SEGADDR(phys), exec_offset);
+ __flush_cache_one(start, phys, exec_offset);
local_irq_restore(flags);
}
@@ -123,14 +117,14 @@ 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;
/* Loop all the D-cache */
n = boot_cpu_data.dcache.n_aliases;
- for (i = 0; i < n; i++, addr += 4096)
- flush_cache_4096(addr, phys);
+ for (i = 0; i < n; i++, addr += PAGE_SIZE)
+ flush_cache_one(addr, phys);
}
wmb();
@@ -158,10 +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)
@@ -170,89 +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.
*/
@@ -263,33 +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();
}
/*
@@ -302,44 +211,62 @@ 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_4096(
- CACHE_OC_ADDRESS_ARRAY | (address & alias_mask),
- phys);
- /* Loop another 4K of the D-cache */
- flush_cache_4096(
- 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_4096(
- 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;
+ }
+
+ 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);
}
}
@@ -372,28 +299,14 @@ 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();
- }
}
/**
- * __flush_cache_4096
+ * __flush_cache_one
*
* @addr: address in memory mapped cache array
* @phys: P1 address to flush (has to match tags if addr has 'A' bit
@@ -406,7 +319,7 @@ static void sh4_flush_cache_range(void *args)
* operation (purge/write-back) is selected by the lower 2 bits of
* 'phys'.
*/
-static void __flush_cache_4096(unsigned long addr, unsigned long phys,
+static void __flush_cache_one(unsigned long addr, unsigned long phys,
unsigned long exec_offset)
{
int way_count;
@@ -463,245 +376,6 @@ static void __flush_cache_4096(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);
/*
@@ -709,32 +383,11 @@ 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 467ff8e260f7..eb4cc4ec7952 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 2601935eb589..f527fb70fce6 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 35c37b7f717a..b8607fa7ae12 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)
{
@@ -128,14 +131,10 @@ void __update_cache(struct vm_area_struct *vma,
return;
page = pfn_to_page(pfn);
- if (pfn_valid(pfn) && page_mapping(page)) {
+ if (pfn_valid(pfn)) {
int dirty = test_and_clear_bit(PG_dcache_dirty, &page->flags);
- if (dirty) {
- unsigned long addr = (unsigned long)page_address(page);
-
- if (pages_do_alias(addr, address & PAGE_MASK))
- __flush_purge_region((void *)addr, PAGE_SIZE);
- }
+ if (dirty)
+ __flush_purge_region(page_address(page), PAGE_SIZE);
}
}
@@ -161,14 +160,21 @@ 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 +201,13 @@ 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)
{
@@ -265,6 +273,12 @@ static void __init emit_cache_params(void)
void __init cpu_cache_init(void)
{
+ 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);
compute_alias(&boot_cpu_data.scache);
@@ -273,6 +287,13 @@ void __init cpu_cache_init(void)
__flush_purge_region = noop__flush_region;
__flush_invalidate_region = noop__flush_region;
+ /*
+ * No flushing is necessary in the disabled cache case so we can
+ * just keep the noop functions in local_flush_..() and __flush_..()
+ */
+ if (unlikely(cache_disabled))
+ goto skip;
+
if (boot_cpu_data.family == CPU_FAMILY_SH2) {
extern void __weak sh2_cache_init(void);
@@ -312,5 +333,6 @@ void __init cpu_cache_init(void)
sh5_cache_init();
}
+skip:
emit_cache_params();
}
diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index e098ec158ddb..902967e3f841 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 8173e38afd38..432acd07e76a 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/ioremap_32.c b/arch/sh/mm/ioremap_32.c
index a86eaa9d75a5..2141befb4f91 100644
--- a/arch/sh/mm/ioremap_32.c
+++ b/arch/sh/mm/ioremap_32.c
@@ -33,10 +33,10 @@
* have to convert them into an offset in a page-aligned mapping, but the
* caller shouldn't need to know that small detail.
*/
-void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
- unsigned long flags)
+void __iomem *__ioremap_caller(unsigned long phys_addr, unsigned long size,
+ unsigned long flags, void *caller)
{
- struct vm_struct * area;
+ struct vm_struct *area;
unsigned long offset, last_addr, addr, orig_addr;
pgprot_t pgprot;
@@ -67,7 +67,7 @@ void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
/*
* Ok, go for it..
*/
- area = get_vm_area(size, VM_IOREMAP);
+ area = get_vm_area_caller(size, VM_IOREMAP, caller);
if (!area)
return NULL;
area->phys_addr = phys_addr;
@@ -103,7 +103,7 @@ void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
return (void __iomem *)(offset + (char *)orig_addr);
}
-EXPORT_SYMBOL(__ioremap);
+EXPORT_SYMBOL(__ioremap_caller);
void __iounmap(void __iomem *addr)
{
diff --git a/arch/sh/mm/ioremap_64.c b/arch/sh/mm/ioremap_64.c
index b16843d02b76..ef434657d428 100644
--- a/arch/sh/mm/ioremap_64.c
+++ b/arch/sh/mm/ioremap_64.c
@@ -258,15 +258,15 @@ static void shmedia_unmapioaddr(unsigned long vaddr)
pte_clear(&init_mm, vaddr, ptep);
}
-void __iomem *__ioremap(unsigned long offset, unsigned long size,
- unsigned long flags)
+void __iomem *__ioremap_caller(unsigned long offset, unsigned long size,
+ unsigned long flags, void *caller)
{
char name[14];
sprintf(name, "phys_%08x", (u32)offset);
return shmedia_alloc_io(offset, size, name, flags);
}
-EXPORT_SYMBOL(__ioremap);
+EXPORT_SYMBOL(__ioremap_caller);
void __iounmap(void __iomem *virtual)
{
diff --git a/arch/sh/mm/kmap.c b/arch/sh/mm/kmap.c
index 16e01b5fed04..15d74ea42094 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/mmap.c b/arch/sh/mm/mmap.c
index d2984fa42d3d..afeb710ec5c3 100644
--- a/arch/sh/mm/mmap.c
+++ b/arch/sh/mm/mmap.c
@@ -54,7 +54,8 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
/* We do not accept a shared mapping if it would violate
* cache aliasing constraints.
*/
- if ((flags & MAP_SHARED) && (addr & shm_align_mask))
+ if ((flags & MAP_SHARED) &&
+ ((addr - (pgoff << PAGE_SHIFT)) & shm_align_mask))
return -EINVAL;
return addr;
}
diff --git a/arch/sh/mm/numa.c b/arch/sh/mm/numa.c
index 9b784fdb947c..422e92721878 100644
--- a/arch/sh/mm/numa.c
+++ b/arch/sh/mm/numa.c
@@ -28,7 +28,7 @@ void __init setup_memory(void)
{
unsigned long free_pfn = PFN_UP(__pa(_end));
u64 base = min_low_pfn << PAGE_SHIFT;
- u64 size = (max_low_pfn << PAGE_SHIFT) - min_low_pfn;
+ u64 size = (max_low_pfn << PAGE_SHIFT) - base;
lmb_add(base, size);
@@ -38,6 +38,15 @@ void __init setup_memory(void)
(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET));
/*
+ * Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET.
+ */
+ if (CONFIG_ZERO_PAGE_OFFSET != 0)
+ lmb_reserve(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET);
+
+ lmb_analyze();
+ lmb_dump_all();
+
+ /*
* Node 0 sets up its pgdat at the first available pfn,
* and bumps it up before setting up the bootmem allocator.
*/
@@ -60,7 +69,7 @@ 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;
@@ -71,7 +80,7 @@ void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end)
/* Node-local pgdat */
NODE_DATA(nid) = __va(lmb_alloc_base(sizeof(struct pglist_data),
- SMP_CACHE_BYTES, end_pfn));
+ SMP_CACHE_BYTES, end));
memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
@@ -81,7 +90,7 @@ void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end)
/* Node-local bootmap */
bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
bootmem_paddr = lmb_alloc_base(bootmap_pages << PAGE_SHIFT,
- PAGE_SIZE, end_pfn);
+ PAGE_SIZE, end);
init_bootmem_node(NODE_DATA(nid), bootmem_paddr >> PAGE_SHIFT,
start_pfn, end_pfn);
diff --git a/arch/sh/mm/pmb-fixed.c b/arch/sh/mm/pmb-fixed.c
deleted file mode 100644
index 43c8eac4d8a1..000000000000
--- 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 aade31102112..280f6a166035 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;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 21:15:41 +0000