3 files changed, 139 insertions, 0 deletions
diff --git a/sys/include/vm/dynalloc.h b/sys/include/vm/dynalloc.h
new file mode 100644
index 0000000..11d8f31
--- /dev/null
+++ b/sys/include/vm/dynalloc.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _VM_DYNALLOC_H_
+#define _VM_DYNALLOC_H_
+
+#include <sys/types.h>
+
+void *dynalloc(size_t sz);
+void *dynrealloc(void *old_ptr, size_t newsize);
+void dynfree(void *ptr);
+
+#endif  /* !_VM_DYNALLOC_H_ */
diff --git a/sys/include/vm/tlsf.h b/sys/include/vm/tlsf.h
new file mode 100644
index 0000000..e9b5a91
--- /dev/null
+++ b/sys/include/vm/tlsf.h
@@ -0,0 +1,90 @@
+#ifndef INCLUDED_tlsf
+#define INCLUDED_tlsf
+
+/*
+** Two Level Segregated Fit memory allocator, version 3.1.
+** Written by Matthew Conte
+**	http://tlsf.baisoku.org
+**
+** Based on the original documentation by Miguel Masmano:
+**	http://www.gii.upv.es/tlsf/main/docs
+**
+** This implementation was written to the specification
+** of the document, therefore no GPL restrictions apply.
+** 
+** Copyright (c) 2006-2016, Matthew Conte
+** All rights reserved.
+** 
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are met:
+**     * Redistributions of source code must retain the above copyright
+**       notice, this list of conditions and the following disclaimer.
+**     * Redistributions in binary form must reproduce the above copyright
+**       notice, this list of conditions and the following disclaimer in the
+**       documentation and/or other materials provided with the distribution.
+**     * Neither the name of the copyright holder nor the
+**       names of its contributors may be used to endorse or promote products
+**       derived from this software without specific prior written permission.
+** 
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+** WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+** DISCLAIMED. IN NO EVENT SHALL MATTHEW CONTE BE LIABLE FOR ANY
+** DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+** (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+** ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+** SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include <stddef.h>
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+/* tlsf_t: a TLSF structure. Can contain 1 to N pools. */
+/* pool_t: a block of memory that TLSF can manage. */
+typedef void* tlsf_t;
+typedef void* pool_t;
+
+/* Create/destroy a memory pool. */
+tlsf_t tlsf_create(void* mem);
+tlsf_t tlsf_create_with_pool(void* mem, size_t bytes);
+void tlsf_destroy(tlsf_t tlsf);
+pool_t tlsf_get_pool(tlsf_t tlsf);
+
+/* Add/remove memory pools. */
+pool_t tlsf_add_pool(tlsf_t tlsf, void* mem, size_t bytes);
+void tlsf_remove_pool(tlsf_t tlsf, pool_t pool);
+
+/* malloc/memalign/realloc/free replacements. */
+void* tlsf_malloc(tlsf_t tlsf, size_t bytes);
+void* tlsf_memalign(tlsf_t tlsf, size_t align, size_t bytes);
+void* tlsf_realloc(tlsf_t tlsf, void* ptr, size_t size);
+void tlsf_free(tlsf_t tlsf, void* ptr);
+
+/* Returns internal block size, not original request size */
+size_t tlsf_block_size(void* ptr);
+
+/* Overheads/limits of internal structures. */
+size_t tlsf_size(void);
+size_t tlsf_align_size(void);
+size_t tlsf_block_size_min(void);
+size_t tlsf_block_size_max(void);
+size_t tlsf_pool_overhead(void);
+size_t tlsf_alloc_overhead(void);
+
+/* Debugging. */
+typedef void (*tlsf_walker)(void* ptr, size_t size, int used, void* user);
+void tlsf_walk_pool(pool_t pool, tlsf_walker walker, void* user);
+/* Returns nonzero if any internal consistency check fails. */
+int tlsf_check(tlsf_t tlsf);
+int tlsf_check_pool(pool_t pool);
+
+#if defined(__cplusplus)
+};
+#endif
+
+#endif
diff --git a/sys/include/vm/vm.h b/sys/include/vm/vm.h
index a2caa8c..bf49e67 100644
--- a/sys/include/vm/vm.h
+++ b/sys/include/vm/vm.h
@@ -32,6 +32,8 @@
 
 #include <sys/types.h>
 #include <sys/limine.h>
+#include <sys/spinlock.h>
+#include <vm/tlsf.h>
 
 extern volatile struct limine_hhdm_request g_hhdm_request;
 
@@ -41,6 +43,14 @@ extern volatile struct limine_hhdm_request g_hhdm_request;
 
 #define DEFAULT_PAGESIZE 4096
 
+struct vm_ctx {
+    size_t dynalloc_pool_sz;
+    uintptr_t dynalloc_pool_pa;
+    struct spinlock dynalloc_lock;
+    tlsf_t tlsf_ctx;
+};
+
+struct vm_ctx *vm_get_ctx(void);
 void vm_init(void);
 
 #endif