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-rw-r--r--arch/arm/mm/Kconfig8
-rw-r--r--arch/arm/mm/consistent.c54
-rw-r--r--arch/arm/mm/discontig.c4
-rw-r--r--arch/arm/mm/ioremap.c49
-rw-r--r--arch/arm/mm/mm-armv.c1
5 files changed, 75 insertions, 41 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index e84fdde6edf8..3b79d0e23455 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -62,8 +62,8 @@ config CPU_ARM720T
# ARM920T
config CPU_ARM920T
bool "Support ARM920T processor" if !ARCH_S3C2410
- depends on ARCH_INTEGRATOR || ARCH_S3C2410 || ARCH_IMX || ARCH_AAEC2000
- default y if ARCH_S3C2410
+ depends on ARCH_INTEGRATOR || ARCH_S3C2410 || ARCH_IMX || ARCH_AAEC2000 || ARCH_AT91RM9200
+ default y if ARCH_S3C2410 || ARCH_AT91RM9200
select CPU_32v4
select CPU_ABRT_EV4T
select CPU_CACHE_V4WT
@@ -83,8 +83,8 @@ config CPU_ARM920T
# ARM922T
config CPU_ARM922T
bool "Support ARM922T processor" if ARCH_INTEGRATOR
- depends on ARCH_CAMELOT || ARCH_LH7A40X || ARCH_INTEGRATOR
- default y if ARCH_CAMELOT || ARCH_LH7A40X
+ depends on ARCH_LH7A40X || ARCH_INTEGRATOR
+ default y if ARCH_LH7A40X
select CPU_32v4
select CPU_ABRT_EV4T
select CPU_CACHE_V4WT
diff --git a/arch/arm/mm/consistent.c b/arch/arm/mm/consistent.c
index dbfe9e891f01..c2ee18d2075e 100644
--- a/arch/arm/mm/consistent.c
+++ b/arch/arm/mm/consistent.c
@@ -19,17 +19,26 @@
#include <linux/dma-mapping.h>
#include <asm/cacheflush.h>
-#include <asm/io.h>
#include <asm/tlbflush.h>
+#include <asm/sizes.h>
+
+/* Sanity check size */
+#if (CONSISTENT_DMA_SIZE % SZ_2M)
+#error "CONSISTENT_DMA_SIZE must be multiple of 2MiB"
+#endif
-#define CONSISTENT_BASE (0xffc00000)
#define CONSISTENT_END (0xffe00000)
+#define CONSISTENT_BASE (CONSISTENT_END - CONSISTENT_DMA_SIZE)
+
#define CONSISTENT_OFFSET(x) (((unsigned long)(x) - CONSISTENT_BASE) >> PAGE_SHIFT)
+#define CONSISTENT_PTE_INDEX(x) (((unsigned long)(x) - CONSISTENT_BASE) >> PGDIR_SHIFT)
+#define NUM_CONSISTENT_PTES (CONSISTENT_DMA_SIZE >> PGDIR_SHIFT)
+
/*
- * This is the page table (2MB) covering uncached, DMA consistent allocations
+ * These are the page tables (2MB each) covering uncached, DMA consistent allocations
*/
-static pte_t *consistent_pte;
+static pte_t *consistent_pte[NUM_CONSISTENT_PTES];
static DEFINE_SPINLOCK(consistent_lock);
/*
@@ -143,7 +152,7 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
unsigned long order;
u64 mask = ISA_DMA_THRESHOLD, limit;
- if (!consistent_pte) {
+ if (!consistent_pte[0]) {
printk(KERN_ERR "%s: not initialised\n", __func__);
dump_stack();
return NULL;
@@ -206,9 +215,12 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
c = vm_region_alloc(&consistent_head, size,
gfp & ~(__GFP_DMA | __GFP_HIGHMEM));
if (c) {
- pte_t *pte = consistent_pte + CONSISTENT_OFFSET(c->vm_start);
+ pte_t *pte;
struct page *end = page + (1 << order);
+ int idx = CONSISTENT_PTE_INDEX(c->vm_start);
+ u32 off = CONSISTENT_OFFSET(c->vm_start) & (PTRS_PER_PTE-1);
+ pte = consistent_pte[idx] + off;
c->vm_pages = page;
/*
@@ -227,6 +239,11 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
set_pte(pte, mk_pte(page, prot));
page++;
pte++;
+ off++;
+ if (off >= PTRS_PER_PTE) {
+ off = 0;
+ pte = consistent_pte[++idx];
+ }
} while (size -= PAGE_SIZE);
/*
@@ -328,6 +345,8 @@ void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr
struct vm_region *c;
unsigned long flags, addr;
pte_t *ptep;
+ int idx;
+ u32 off;
WARN_ON(irqs_disabled());
@@ -348,7 +367,9 @@ void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr
size = c->vm_end - c->vm_start;
}
- ptep = consistent_pte + CONSISTENT_OFFSET(c->vm_start);
+ idx = CONSISTENT_PTE_INDEX(c->vm_start);
+ off = CONSISTENT_OFFSET(c->vm_start) & (PTRS_PER_PTE-1);
+ ptep = consistent_pte[idx] + off;
addr = c->vm_start;
do {
pte_t pte = ptep_get_and_clear(&init_mm, addr, ptep);
@@ -356,6 +377,11 @@ void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr
ptep++;
addr += PAGE_SIZE;
+ off++;
+ if (off >= PTRS_PER_PTE) {
+ off = 0;
+ ptep = consistent_pte[++idx];
+ }
if (!pte_none(pte) && pte_present(pte)) {
pfn = pte_pfn(pte);
@@ -402,11 +428,12 @@ static int __init consistent_init(void)
pgd_t *pgd;
pmd_t *pmd;
pte_t *pte;
- int ret = 0;
+ int ret = 0, i = 0;
+ u32 base = CONSISTENT_BASE;
do {
- pgd = pgd_offset(&init_mm, CONSISTENT_BASE);
- pmd = pmd_alloc(&init_mm, pgd, CONSISTENT_BASE);
+ pgd = pgd_offset(&init_mm, base);
+ pmd = pmd_alloc(&init_mm, pgd, base);
if (!pmd) {
printk(KERN_ERR "%s: no pmd tables\n", __func__);
ret = -ENOMEM;
@@ -414,15 +441,16 @@ static int __init consistent_init(void)
}
WARN_ON(!pmd_none(*pmd));
- pte = pte_alloc_kernel(pmd, CONSISTENT_BASE);
+ pte = pte_alloc_kernel(pmd, base);
if (!pte) {
printk(KERN_ERR "%s: no pte tables\n", __func__);
ret = -ENOMEM;
break;
}
- consistent_pte = pte;
- } while (0);
+ consistent_pte[i++] = pte;
+ base += (1 << PGDIR_SHIFT);
+ } while (base < CONSISTENT_END);
return ret;
}
diff --git a/arch/arm/mm/discontig.c b/arch/arm/mm/discontig.c
index 0d097bb1bc4d..1e5602189507 100644
--- a/arch/arm/mm/discontig.c
+++ b/arch/arm/mm/discontig.c
@@ -9,10 +9,8 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-
#include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/init.h>
+#include <linux/mmzone.h>
#include <linux/bootmem.h>
#if MAX_NUMNODES != 4 && MAX_NUMNODES != 16
diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 10901398e4a2..de3ce1eec2ec 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -86,11 +86,12 @@ remap_area_pmd(pmd_t * pmd, unsigned long address, unsigned long size,
}
static int
-remap_area_pages(unsigned long start, unsigned long phys_addr,
+remap_area_pages(unsigned long start, unsigned long pfn,
unsigned long size, unsigned long flags)
{
unsigned long address = start;
unsigned long end = start + size;
+ unsigned long phys_addr = __pfn_to_phys(pfn);
int err = 0;
pgd_t * dir;
@@ -130,36 +131,44 @@ remap_area_pages(unsigned long start, unsigned long phys_addr,
* mapping. See include/asm-arm/proc-armv/pgtable.h for more information.
*/
void __iomem *
+__ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
+ unsigned long flags)
+{
+ unsigned long addr;
+ struct vm_struct * area;
+
+ area = get_vm_area(size, VM_IOREMAP);
+ if (!area)
+ return NULL;
+ addr = (unsigned long)area->addr;
+ if (remap_area_pages(addr, pfn, size, flags)) {
+ vfree(addr);
+ return NULL;
+ }
+ return (void __iomem *) (offset + (char *)addr);
+}
+EXPORT_SYMBOL(__ioremap_pfn);
+
+void __iomem *
__ioremap(unsigned long phys_addr, size_t size, unsigned long flags)
{
- void * addr;
- struct vm_struct * area;
- unsigned long offset, last_addr;
+ unsigned long last_addr;
+ unsigned long offset = phys_addr & ~PAGE_MASK;
+ unsigned long pfn = __phys_to_pfn(phys_addr);
- /* Don't allow wraparound or zero size */
+ /*
+ * Don't allow wraparound or zero size
+ */
last_addr = phys_addr + size - 1;
if (!size || last_addr < phys_addr)
return NULL;
/*
- * Mappings have to be page-aligned
+ * Page align the mapping size
*/
- offset = phys_addr & ~PAGE_MASK;
- phys_addr &= PAGE_MASK;
size = PAGE_ALIGN(last_addr + 1) - phys_addr;
- /*
- * Ok, go for it..
- */
- area = get_vm_area(size, VM_IOREMAP);
- if (!area)
- return NULL;
- addr = area->addr;
- if (remap_area_pages((unsigned long) addr, phys_addr, size, flags)) {
- vfree(addr);
- return NULL;
- }
- return (void __iomem *) (offset + (char *)addr);
+ return __ioremap_pfn(pfn, offset, size, flags);
}
EXPORT_SYMBOL(__ioremap);
diff --git a/arch/arm/mm/mm-armv.c b/arch/arm/mm/mm-armv.c
index 9e50127be635..d0245a31d4dd 100644
--- a/arch/arm/mm/mm-armv.c
+++ b/arch/arm/mm/mm-armv.c
@@ -19,7 +19,6 @@
#include <asm/pgalloc.h>
#include <asm/page.h>
-#include <asm/io.h>
#include <asm/setup.h>
#include <asm/tlbflush.h>
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-24 16:32:54 +0300