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CRIS v32: Fix bug in internal memory allocator mm/intmem.c 

- Fix bug where allocated memory didn't account for alignment.
- Add support for ARTPEC-3
- Add module_init for crisv32_intmem_init.
This commit is contained in:
Jesper Nilsson 2008-01-25 18:03:00 +01:00
parent 0836c6d26f
commit 108ecfbc31
1 changed files with 31 additions and 17 deletions
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48
arch/cris/arch-v32/mm/intmem.c
View File

@ -7,11 +7,17 @@
#include <linux/list.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <asm/arch/memmap.h>
#include <memmap.h>
#define STATUS_FREE 0
#define STATUS_ALLOCATED 1
#ifdef CONFIG_ETRAX_L2CACHE
#define RESERVED_SIZE 66*1024
#else
#define RESERVED_SIZE 0
#endif
struct intmem_allocation {
struct list_head entry;
unsigned int size;
@ -30,9 +36,10 @@ static void crisv32_intmem_init(void)
struct intmem_allocation* alloc =
(struct intmem_allocation*)kmalloc(sizeof *alloc, GFP_KERNEL);
INIT_LIST_HEAD(&intmem_allocations);
intmem_virtual = ioremap(MEM_INTMEM_START, MEM_INTMEM_SIZE);
intmem_virtual = ioremap(MEM_INTMEM_START + RESERVED_SIZE,
MEM_INTMEM_SIZE - RESERVED_SIZE);
initiated = 1;
alloc->size = MEM_INTMEM_SIZE;
alloc->size = MEM_INTMEM_SIZE - RESERVED_SIZE;
alloc->offset = 0;
alloc->status = STATUS_FREE;
list_add_tail(&alloc->entry, &intmem_allocations);
@ -59,19 +66,23 @@ void* crisv32_intmem_alloc(unsigned size, unsigned align)
(struct intmem_allocation*)
kmalloc(sizeof *alloc, GFP_ATOMIC);
alloc->status = STATUS_FREE;
alloc->size = allocation->size - size - alignment;
alloc->offset = allocation->offset + size;
alloc->size = allocation->size - size -
alignment;
alloc->offset = allocation->offset + size +
alignment;
list_add(&alloc->entry, &allocation->entry);
if (alignment) {
struct intmem_allocation* tmp;
tmp = (struct intmem_allocation*)
kmalloc(sizeof *tmp, GFP_ATOMIC);
struct intmem_allocation *tmp;
tmp = (struct intmem_allocation *)
kmalloc(sizeof *tmp,
GFP_ATOMIC);
tmp->offset = allocation->offset;
tmp->size = alignment;
tmp->status = STATUS_FREE;
allocation->offset += alignment;
list_add_tail(&tmp->entry, &allocation->entry);
list_add_tail(&tmp->entry,
&allocation->entry);
}
}
allocation->status = STATUS_ALLOCATED;
@ -96,22 +107,24 @@ void crisv32_intmem_free(void* addr)
list_for_each_entry_safe(allocation, tmp, &intmem_allocations, entry) {
if (allocation->offset == (int)(addr - intmem_virtual)) {
struct intmem_allocation* prev =
struct intmem_allocation *prev =
list_entry(allocation->entry.prev,
struct intmem_allocation, entry);
struct intmem_allocation* next =
struct intmem_allocation *next =
list_entry(allocation->entry.next,
struct intmem_allocation, entry);
allocation->status = STATUS_FREE;
/* Join with prev and/or next if also free */
if (prev->status == STATUS_FREE) {
if ((prev != &intmem_allocations) &&
(prev->status == STATUS_FREE)) {
prev->size += allocation->size;
list_del(&allocation->entry);
kfree(allocation);
allocation = prev;
}
if (next->status == STATUS_FREE) {
if ((next != &intmem_allocations) &&
(next->status == STATUS_FREE)) {
allocation->size += next->size;
list_del(&next->entry);
kfree(next);
@ -125,15 +138,16 @@ void crisv32_intmem_free(void* addr)
void* crisv32_intmem_phys_to_virt(unsigned long addr)
{
return (void*)(addr - MEM_INTMEM_START+
(unsigned long)intmem_virtual);
return (void *)(addr - (MEM_INTMEM_START + RESERVED_SIZE) +
(unsigned long)intmem_virtual);
}
unsigned long crisv32_intmem_virt_to_phys(void* addr)
{
return (unsigned long)((unsigned long )addr -
(unsigned long)intmem_virtual + MEM_INTMEM_START);
(unsigned long)intmem_virtual + MEM_INTMEM_START +
RESERVED_SIZE);
}
module_init(crisv32_intmem_init);