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Add a kmalloc_eternal() for things that will never be destroyed.

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This commit is contained in:
Andreas Kling 2018-10-31 23:19:15 +01:00
parent d980ddc745
commit 9a086b2d35
20 changed files with 85 additions and 20 deletions
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17
Kernel/kmalloc.cpp
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@ -22,15 +22,21 @@ typedef struct
#define CHUNK_SIZE 128
#define POOL_SIZE (1024 * 1024)
#define ETERNAL_BASE_PHYSICAL 0x300000
#define BASE_PHYS 0x200000
PRIVATE BYTE alloc_map[POOL_SIZE / CHUNK_SIZE / 8];
volatile DWORD sum_alloc = 0;
volatile DWORD sum_free = POOL_SIZE;
volatile size_t kmalloc_sum_eternal = 0;
static byte* s_next_eternal_ptr;
bool is_kmalloc_address(void* ptr)
{
if (ptr >= (byte*)ETERNAL_BASE_PHYSICAL && ptr < s_next_eternal_ptr)
return true;
return ptr >= (void*)BASE_PHYS && ptr <= ((void*)BASE_PHYS + POOL_SIZE);
}
@ -40,8 +46,19 @@ kmalloc_init()
memset( &alloc_map, 0, sizeof(alloc_map) );
memset( (void *)BASE_PHYS, 0, POOL_SIZE );
kmalloc_sum_eternal = 0;
sum_alloc = 0;
sum_free = POOL_SIZE;
s_next_eternal_ptr = (byte*)ETERNAL_BASE_PHYSICAL;
}
void* kmalloc_eternal(size_t size)
{
void* ptr = s_next_eternal_ptr;
s_next_eternal_ptr += size;
kmalloc_sum_eternal += size;
return ptr;
}
PUBLIC void *