1 #include <stdlib.h> 2 #include <errno.h> 3 #include <string.h> 4 #include "malloc.h" 5 #include "core.h" 6 #include <syslinux/memscan.h> 7 #include <dprintf.h> 8 9 struct free_arena_header __core_malloc_head[NHEAP]; 10 11 //static __hugebss char main_heap[128 << 10]; 12 extern char __lowmem_heap[]; 13 extern char free_high_memory[]; 14 15 #define E820_MEM_MAX 0xfff00000 /* 4 GB - 1 MB */ 16 int scan_highmem_area(void *data, addr_t start, addr_t len, 17 enum syslinux_memmap_types type) 18 { 19 struct free_arena_header *fp; 20 21 (void)data; 22 23 dprintf("start = %x, len = %x, type = %d", start, len, type); 24 25 if (start < 0x100000 || start > E820_MEM_MAX 26 || type != SMT_FREE) 27 return 0; 28 29 if (start < __com32.cs_memsize) { 30 len -= __com32.cs_memsize - start; 31 start = __com32.cs_memsize; 32 } 33 if (len > E820_MEM_MAX - start) 34 len = E820_MEM_MAX - start; 35 36 if (len >= 2 * sizeof(struct arena_header)) { 37 fp = (struct free_arena_header *)start; 38 fp->a.attrs = ARENA_TYPE_USED | (HEAP_MAIN << ARENA_HEAP_POS); 39 #ifdef DEBUG_MALLOC 40 fp->a.magic = ARENA_MAGIC; 41 #endif 42 ARENA_SIZE_SET(fp->a.attrs, len); 43 dprintf("will inject a block start:0x%x size 0x%x", start, len); 44 __inject_free_block(fp); 45 } 46 47 __com32.cs_memsize = start + len; /* update the HighMemSize */ 48 return 0; 49 } 50 51 #if 0 52 static void mpool_dump(enum heap heap) 53 { 54 struct free_arena_header *head = &__core_malloc_head[heap]; 55 struct free_arena_header *fp; 56 int size, type, i = 0; 57 addr_t start, end; 58 59 fp = head->next_free; 60 while (fp != head) { 61 size = ARENA_SIZE_GET(fp->a.attrs); 62 type = ARENA_TYPE_GET(fp->a.attrs); 63 start = (addr_t)fp; 64 end = start + size; 65 printf("area[%d]: start = 0x%08x, end = 0x%08x, type = %d\n", 66 i++, start, end, type); 67 fp = fp->next_free; 68 } 69 } 70 #endif 71 72 uint16_t *bios_free_mem; 73 void mem_init(void) 74 { 75 struct free_arena_header *fp; 76 int i; 77 78 //dprintf("enter"); 79 80 /* Initialize the head nodes */ 81 fp = &__core_malloc_head[0]; 82 for (i = 0 ; i < NHEAP ; i++) { 83 fp->a.next = fp->a.prev = fp->next_free = fp->prev_free = fp; 84 fp->a.attrs = ARENA_TYPE_HEAD | (i << ARENA_HEAP_POS); 85 fp->a.tag = MALLOC_HEAD; 86 fp++; 87 } 88 89 //dprintf("__lowmem_heap = 0x%p bios_free = 0x%p", 90 // __lowmem_heap, *bios_free_mem); 91 92 /* Initialize the lowmem heap */ 93 fp = (struct free_arena_header *)__lowmem_heap; 94 fp->a.attrs = ARENA_TYPE_USED | (HEAP_LOWMEM << ARENA_HEAP_POS); 95 ARENA_SIZE_SET(fp->a.attrs, (*bios_free_mem << 10) - (uintptr_t)fp); 96 #ifdef DEBUG_MALLOC 97 fp->a.magic = ARENA_MAGIC; 98 #endif 99 __inject_free_block(fp); 100 101 /* Initialize the main heap */ 102 __com32.cs_memsize = (size_t)free_high_memory; 103 syslinux_scan_memory(scan_highmem_area, NULL); 104 } 105
