Import hyra expt

1 files changed, 70 insertions, 0 deletions

diff --git a/sys/vm/vm_init.c b/sys/vm/vm_init.c
new file mode 100644
index 0000000..b6bb8a1
--- /dev/null
+++ b/sys/vm/vm_init.c
@@ -0,0 +1,70 @@
+/*
+ * 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.
+ */
+
+#include <sys/limine.h>
+#include <sys/panic.h>
+#include <vm/vm.h>
+#include <vm/physmem.h>
+#include <vm/pmap.h>
+#include <assert.h>
+
+#define DYNALLOC_POOL_SZ        0x400000  /* 4 MiB */
+#define DYNALLOC_POOL_PAGES     (DYNALLOC_POOL_SZ / DEFAULT_PAGESIZE)
+
+struct vas g_kvas;
+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();
+
+    g_kvas = pmap_read_vas();
+    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);
+}