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[kernel] Move slab_allocated items to the heap

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Allocate the slabs for slab-allocated items to the heap, now that heap
regions are aligned. This also lets the slab sizes be non-page-sized.
This commit is contained in:
Justin C. Miller
2022-10-11 18:52:19 -07:00
parent c9bcc87511
commit e830a3d37b
4 changed files with 7 additions and 22 deletions
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15
src/kernel/slab_allocated.h
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@@ -8,14 +8,11 @@
#include "memory.h"
extern uintptr_t g_slabs_bump_pointer;
template <typename T, unsigned N = 1>
template <typename T, size_t N>
class slab_allocated
{
public:
constexpr static unsigned slab_pages = N;
constexpr static unsigned slab_size = N * mem::frame_size;
static constexpr size_t slab_size = N;
void * operator new(size_t size)
{
@@ -37,9 +34,7 @@ private:
{
s_free.ensure_capacity(per_block);
uintptr_t start = __atomic_fetch_add(
&g_slabs_bump_pointer, slab_size,
__ATOMIC_SEQ_CST);
uint8_t *start = new uint8_t [slab_size];
T *current = reinterpret_cast<T*>(start);
T *end = util::offset_pointer(current, slab_size);
@@ -50,8 +45,8 @@ private:
static util::vector<T*> s_free;
};
template <typename T, unsigned N>
template <typename T, size_t N>
util::vector<T*> slab_allocated<T,N>::s_free;
#define DEFINE_SLAB_ALLOCATOR(type) \
template<> util::vector<typename type*> slab_allocated<typename type, type::slab_pages>::s_free {};
template<> util::vector<typename type*> slab_allocated<typename type, type::slab_size>::s_free {};