Nigel/BarinkOS
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Multiboot Memory Map get copied to a "safe" place

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Nigel Barink
2022-08-23 21:35:19 +02:00
parent 5051b8903c
commit 59ba41f3d2
5 changed files with 151 additions and 43 deletions
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21
source/kernel/PreKernel/bootstructure.h
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@ -5,6 +5,24 @@
extern "C" const uint32_t kernel_begin;
extern "C" const uint32_t kernel_end;
// Put the BootInfoBlock 1MB above the kernel.
const uint32_t BootInfoBlock_pptr = (uint32_t)&kernel_end - 0xC0000000 + 0x1;
const uint32_t MemoryMapHeap_pptr = BootInfoBlock_pptr + 0x1;
#define IS_AVAILABLE_MEM(MEM_TYPE) MEM_TYPE & 0x1
#define IS_ACPI_MEM(MEM_TYPE) MEM_TYPE & 0x2
#define IS_RESERVED_MEM(MEM_TYPE) MEM_TYPE & 0x3
#define IS_NVS_MEMORY(MEM_TYPE) MEM_TYPE & 0x8
#define IS_BADRAM_MEMORY(MEM_TYPE) MEM_TYPE & 0x10
struct MemoryInfoBlock {
uint32_t Base_addr ;
uint32_t Memory_Size;
MemoryInfoBlock* next;
uint8_t type;
};
struct BootInfoBlock {
bool MapIsInvalid;
uint32_t bootDeviceID ;
@ -21,8 +39,7 @@ struct BootInfoBlock {
bool EnabledVBE;
bool PhysicalMemoryMapAvailable;
MemoryInfoBlock* MemoryMap;
};
// Put the BootInfoBlock 1MB above the kernel.
const uint32_t BootInfoBlock_pptr = kernel_end - 0xC0000000 + 0x1000;