kernel: Restore multiboot-provided memmap

Author: fwsGonzo

src/kernel/multiboot.cpp

@@ -100,7 +100,7 @@ void OS::multiboot(uint32_t boot_addr)
     uint32_t mem_high_end = mem_high_start + (bootinfo_->mem_upper * 1024) - 1;
     uint32_t mem_high_kb = bootinfo_->mem_upper;
 
-    OS::memory_end_ = mem_high_kb * 1024 + mem_high_start;
+    OS::memory_end_ = mem_high_end;
 
     INFO2("* Valid memory (%i Kib):", mem_low_kb + mem_high_kb);
     INFO2("\t 0x%08x - 0x%08x (%i Kib)",
@@ -119,7 +119,6 @@ void OS::multiboot(uint32_t boot_addr)
     OS::cmdline = reinterpret_cast<const char*>(bootinfo_->cmdline);
   }
 
-/*
   if (bootinfo_->flags & MULTIBOOT_INFO_MEM_MAP) {
     INFO2("* Multiboot provided memory map  (%i entries @ %p)",
           bootinfo_->mmap_length / sizeof(multiboot_memory_map_t), (void*)bootinfo_->mmap_addr);
@@ -140,7 +139,6 @@ void OS::multiboot(uint32_t boot_addr)
     }
     printf("\n");
   }
-*/
 
   Span_mods mods = modules();