[PATCH 07/13] Switch SPARC32 over to use OFMEM's malloc()/free() internally rather than using it's own implementation.

[Mark Cave-Ayland]

Also juggle the memory to take into account that the allocations are coming from OFMEM, and remove
posix_memalign2() since it is no longer required.

Signed-off-by: Mark Cave-Ayland 
---
 openbios-devel/arch/sparc32/ldscript        |    3 +-
 openbios-devel/arch/sparc32/lib.c           |  120 ++-------------------------
 openbios-devel/arch/sparc32/ofmem_sparc32.c |    2 +-
 3 files changed, 11 insertions(+), 114 deletions(-)

diff --git a/openbios-devel/arch/sparc32/ldscript b/openbios-devel/arch/sparc32/ldscript
index da94a56..32c9445 100644
--- a/openbios-devel/arch/sparc32/ldscript
+++ b/openbios-devel/arch/sparc32/ldscript
@@ -12,8 +12,7 @@ BASE_ADDR = 0xffd00000;

/* 16KB stack */
 STACK_SIZE = 16384;
-/* 256k general alloc + 256k Forth dictionary + 16k Forth memory */
-VMEM_SIZE = (256 + 256 + 16) * 1024;
+VMEM_SIZE = 128 * 1024;
 IOMEM_SIZE = 256 * 1024 + 768 * 1024;

SECTIONS
diff --git a/openbios-devel/arch/sparc32/lib.c b/openbios-devel/arch/sparc32/lib.c
index a5ad8ca..df9c0c1 100644
--- a/openbios-devel/arch/sparc32/lib.c
+++ b/openbios-devel/arch/sparc32/lib.c
@@ -75,18 +75,6 @@ struct linux_mlist_v0 *ptphys;
 struct linux_mlist_v0 *ptmap;
 struct linux_mlist_v0 *ptavail;

-static struct {
-	char 			*next_malloc;
-        int                     left;
-	alloc_desc_t		*mfree;			/* list of free malloc blocks */
-
-	range_t			*phys_range;
-	range_t			*virt_range;
-
-	translation_t		*trans;			/* this is really a translation_t */
-} ofmem;
-#define ALLOC_BLOCK (64 * 1024)
-
 /* Private functions for mapping between physical/virtual addresses */ 
 phys_addr_t
 va2pa(unsigned long va)
@@ -108,112 +96,22 @@ pa2va(phys_addr_t pa)
         return pa;
 }

-// XXX should be posix_memalign
-static int
-posix_memalign2(void **memptr, size_t alignment, size_t size)
-{
-	alloc_desc_t *d, **pp;
-	char *ret;
-
-	if( !size )
-                return -1;
-
-        size = (size + (alignment - 1)) & ~(alignment - 1);
-	size += sizeof(alloc_desc_t);
-
-	/* look in the freelist */
-	for( pp=&ofmem.mfree; *pp && (**pp).size < size; pp = &(**pp).next )
-		;
-
-	/* waste at most 4K by taking an entry from the freelist */
-	if( *pp && (**pp).size < size + 0x1000 ) {
-		ret = (char*)*pp + sizeof(alloc_desc_t);
-		memset( ret, 0, (**pp).size - sizeof(alloc_desc_t) );
-		*pp = (**pp).next;
-                *memptr = ret;
-                return 0;
-	}
-
-	if( !ofmem.next_malloc || ofmem.left < size) {
-                unsigned long alloc_size = ALLOC_BLOCK;
-                if (size > ALLOC_BLOCK)
-                    alloc_size = size;
-                // Recover possible leftover
-                if ((size_t)ofmem.left > sizeof(alloc_desc_t) + 4) {
-                    alloc_desc_t *d_leftover;
-
-                    d_leftover = (alloc_desc_t*)ofmem.next_malloc;
-                    d_leftover->size = ofmem.left - sizeof(alloc_desc_t);
-                    free((void *)((unsigned long)d_leftover +
-                                  sizeof(alloc_desc_t)));
-                }
-
-                ofmem.next_malloc = mem_alloc(&cmem, alloc_size, 8);
-                ofmem.left = alloc_size;
-        }
-
-	if( ofmem.left < size) {
-		printk("out of malloc memory (%x)!\n", size );
-                return -1;
-	}
-	d = (alloc_desc_t*) ofmem.next_malloc;
-	ofmem.next_malloc += size;
-	ofmem.left -= size;
-
-	d->next = NULL;
-	d->size = size;
-
-	ret = (char*)d + sizeof(alloc_desc_t);
-	memset( ret, 0, size - sizeof(alloc_desc_t) );
-        *memptr = ret;
-        return 0;
-}
-
-void *malloc(int size)
+void *
+malloc(int size)
 {
-    int ret;
-    void *mem;
-
-    ret = posix_memalign2(&mem, 8, size);
-    if (ret != 0)
-        return NULL;
-    return mem;
+    return ofmem_malloc(size);
 }

-void free(void *ptr)
+void *
+realloc( void *ptr, size_t size )
 {
-	alloc_desc_t **pp, *d;
-
-	/* it is legal to free NULL pointers (size zero allocations) */
-	if( !ptr )
-		return;
-
-	d = (alloc_desc_t*)((unsigned long)ptr - sizeof(alloc_desc_t));
-	d->next = ofmem.mfree;
-
-	/* insert in the (sorted) freelist */
-	for( pp=&ofmem.mfree; *pp && (**pp).size < d->size ; pp = &(**pp).next )
-		;
-	d->next = *pp;
-	*pp = d;
+    return ofmem_realloc(ptr, size);
 }

-void *
-realloc( void *ptr, size_t size )
+void
+free(void *ptr)
 {
-	alloc_desc_t *d = (alloc_desc_t*)((unsigned long)ptr - sizeof(alloc_desc_t));
-	char *p;
-
-	if( !ptr )
-		return malloc( size );
-	if( !size ) {
-		free( ptr );
-		return NULL;
-	}
-	p = malloc( size );
-	memcpy( p, ptr, MIN(d->size - sizeof(alloc_desc_t),size) );
-	free( ptr );
-	return p;
+    ofmem_free(ptr);
 }

/*
diff --git a/openbios-devel/arch/sparc32/ofmem_sparc32.c b/openbios-devel/arch/sparc32/ofmem_sparc32.c
index e45af2e..74975e1 100644
--- a/openbios-devel/arch/sparc32/ofmem_sparc32.c
+++ b/openbios-devel/arch/sparc32/ofmem_sparc32.c
@@ -21,7 +21,7 @@

#define OF_MALLOC_BASE		((char*)OFMEM + ALIGN_SIZE(sizeof(ofmem_t), 8))

-#define MEMSIZE (256 * 1024)
+#define MEMSIZE (512 * 1024)
 static union {
    char memory[MEMSIZE];
    ofmem_t ofmem;