diff options
Diffstat (limited to 'extras/mini-os/arch/x86/mm.c')
| -rw-r--r-- | extras/mini-os/arch/x86/mm.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/extras/mini-os/arch/x86/mm.c b/extras/mini-os/arch/x86/mm.c index 082527d098..dd556e4741 100644 --- a/extras/mini-os/arch/x86/mm.c +++ b/extras/mini-os/arch/x86/mm.c @@ -448,6 +448,15 @@ static unsigned long demand_map_area_start; #define DEMAND_MAP_PAGES ((2ULL << 30) / PAGE_SIZE) #endif +#ifdef HAVE_LIBC +unsigned long heap, brk, heap_mapped, heap_end; +#ifdef __x86_64__ +#define HEAP_PAGES ((128ULL << 30) / PAGE_SIZE) +#else +#define HEAP_PAGES ((1ULL << 30) / PAGE_SIZE) +#endif +#endif + void arch_init_demand_mapping_area(unsigned long cur_pfn) { cur_pfn++; @@ -455,6 +464,14 @@ void arch_init_demand_mapping_area(unsigned long cur_pfn) demand_map_area_start = (unsigned long) pfn_to_virt(cur_pfn); cur_pfn += DEMAND_MAP_PAGES; printk("Demand map pfns at %lx-%lx.\n", demand_map_area_start, pfn_to_virt(cur_pfn)); + +#ifdef HAVE_LIBC + cur_pfn++; + heap_mapped = brk = heap = (unsigned long) pfn_to_virt(cur_pfn); + cur_pfn += HEAP_PAGES; + heap_end = (unsigned long) pfn_to_virt(cur_pfn); + printk("Heap resides at %lx-%lx.\n", brk, heap_end); +#endif } #define MAP_BATCH ((STACK_SIZE / 2) / sizeof(mmu_update_t)) |