forked from luck/tmp_suning_uos_patched
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.
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0836c6d26f
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@ -7,11 +7,17 @@
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <asm/io.h>
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#include <asm/arch/memmap.h>
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#include <memmap.h>
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#define STATUS_FREE 0
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#define STATUS_ALLOCATED 1
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#ifdef CONFIG_ETRAX_L2CACHE
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#define RESERVED_SIZE 66*1024
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#else
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#define RESERVED_SIZE 0
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#endif
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struct intmem_allocation {
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struct list_head entry;
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unsigned int size;
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@ -30,9 +36,10 @@ static void crisv32_intmem_init(void)
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struct intmem_allocation* alloc =
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(struct intmem_allocation*)kmalloc(sizeof *alloc, GFP_KERNEL);
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INIT_LIST_HEAD(&intmem_allocations);
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intmem_virtual = ioremap(MEM_INTMEM_START, MEM_INTMEM_SIZE);
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intmem_virtual = ioremap(MEM_INTMEM_START + RESERVED_SIZE,
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MEM_INTMEM_SIZE - RESERVED_SIZE);
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initiated = 1;
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alloc->size = MEM_INTMEM_SIZE;
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alloc->size = MEM_INTMEM_SIZE - RESERVED_SIZE;
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alloc->offset = 0;
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alloc->status = STATUS_FREE;
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list_add_tail(&alloc->entry, &intmem_allocations);
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@ -59,19 +66,23 @@ void* crisv32_intmem_alloc(unsigned size, unsigned align)
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(struct intmem_allocation*)
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kmalloc(sizeof *alloc, GFP_ATOMIC);
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alloc->status = STATUS_FREE;
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alloc->size = allocation->size - size - alignment;
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alloc->offset = allocation->offset + size;
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alloc->size = allocation->size - size -
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alignment;
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alloc->offset = allocation->offset + size +
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alignment;
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list_add(&alloc->entry, &allocation->entry);
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if (alignment) {
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struct intmem_allocation* tmp;
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tmp = (struct intmem_allocation*)
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kmalloc(sizeof *tmp, GFP_ATOMIC);
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struct intmem_allocation *tmp;
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tmp = (struct intmem_allocation *)
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kmalloc(sizeof *tmp,
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GFP_ATOMIC);
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tmp->offset = allocation->offset;
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tmp->size = alignment;
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tmp->status = STATUS_FREE;
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allocation->offset += alignment;
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list_add_tail(&tmp->entry, &allocation->entry);
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list_add_tail(&tmp->entry,
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&allocation->entry);
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}
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}
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allocation->status = STATUS_ALLOCATED;
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@ -96,22 +107,24 @@ void crisv32_intmem_free(void* addr)
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list_for_each_entry_safe(allocation, tmp, &intmem_allocations, entry) {
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if (allocation->offset == (int)(addr - intmem_virtual)) {
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struct intmem_allocation* prev =
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struct intmem_allocation *prev =
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list_entry(allocation->entry.prev,
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struct intmem_allocation, entry);
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struct intmem_allocation* next =
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struct intmem_allocation *next =
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list_entry(allocation->entry.next,
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struct intmem_allocation, entry);
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allocation->status = STATUS_FREE;
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/* Join with prev and/or next if also free */
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if (prev->status == STATUS_FREE) {
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if ((prev != &intmem_allocations) &&
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(prev->status == STATUS_FREE)) {
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prev->size += allocation->size;
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list_del(&allocation->entry);
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kfree(allocation);
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allocation = prev;
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}
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if (next->status == STATUS_FREE) {
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if ((next != &intmem_allocations) &&
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(next->status == STATUS_FREE)) {
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allocation->size += next->size;
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list_del(&next->entry);
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kfree(next);
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@ -125,15 +138,16 @@ void crisv32_intmem_free(void* addr)
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void* crisv32_intmem_phys_to_virt(unsigned long addr)
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{
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return (void*)(addr - MEM_INTMEM_START+
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(unsigned long)intmem_virtual);
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return (void *)(addr - (MEM_INTMEM_START + RESERVED_SIZE) +
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(unsigned long)intmem_virtual);
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}
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unsigned long crisv32_intmem_virt_to_phys(void* addr)
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{
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return (unsigned long)((unsigned long )addr -
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(unsigned long)intmem_virtual + MEM_INTMEM_START);
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(unsigned long)intmem_virtual + MEM_INTMEM_START +
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RESERVED_SIZE);
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}
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module_init(crisv32_intmem_init);
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