From e67e3a62edf7d1948d721e0fc62917906798add1 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Wed, 5 Jun 2024 23:27:21 -0400
Subject: kernel: vm: Add port of TLSF

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/vm/vm_init.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'sys/vm/vm_init.c')

diff --git a/sys/vm/vm_init.c b/sys/vm/vm_init.c
index 3e9718d..703942b 100644
--- a/sys/vm/vm_init.c
+++ b/sys/vm/vm_init.c
@@ -28,16 +28,40 @@
  */
 
 #include <sys/limine.h>
+#include <sys/panic.h>
 #include <vm/vm.h>
 #include <vm/physmem.h>
+#include <assert.h>
 
+#define DYNALLOC_POOL_SZ        0x400000  /* 4 MiB */
+#define DYNALLOC_POOL_PAGES     (DYNALLOC_POOL_SZ / DEFAULT_PAGESIZE)
+
+static struct vm_ctx vm_ctx;
 volatile struct limine_hhdm_request g_hhdm_request = {
     .id = LIMINE_HHDM_REQUEST,
     .revision = 0
 };
 
+struct vm_ctx *
+vm_get_ctx(void)
+{
+    return &vm_ctx;
+}
+
 void
 vm_init(void)
 {
+    void *pool;
+
     vm_physmem_init();
+
+    vm_ctx.dynalloc_pool_sz = DYNALLOC_POOL_SZ;
+    vm_ctx.dynalloc_pool_pa = vm_alloc_frame(DYNALLOC_POOL_PAGES);
+    if (vm_ctx.dynalloc_pool_pa == 0) {
+        panic("Failed to allocate dynamic pool\n");
+    }
+
+    pool = PHYS_TO_VIRT(vm_ctx.dynalloc_pool_pa);
+    vm_ctx.tlsf_ctx = tlsf_create_with_pool(pool, DYNALLOC_POOL_SZ);
+    __assert(vm_ctx.tlsf_ctx != 0);
 }
-- 
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