From 3f9278b48ff4bc0d2cf1604034b3bba548572f04 Mon Sep 17 00:00:00 2001
From: Ada Christine <adachristine18@gmail.com>
Date: Sun, 11 Feb 2024 23:48:04 +0000
Subject: kjarna initial impl

---
 kjarna/memory.c | 83 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 kjarna/memory.c

(limited to 'kjarna/memory.c')

diff --git a/kjarna/memory.c b/kjarna/memory.c
new file mode 100644
index 0000000..7fbb4a8
--- /dev/null
+++ b/kjarna/memory.c
@@ -0,0 +1,83 @@
+#include <libc/string.h>
+
+#include <efi/services.h>
+#include <efi/error.h>
+
+#include <stddef.h>
+
+#include "kjarna_efi.h"
+
+void *efi_alloc_pool(size_t size)
+{
+	void *buffer;
+
+	efi_errno = gBS->AllocatePool(
+			EfiLoaderData,
+			size,
+			&buffer);
+
+	if (EFI_ERROR(efi_errno))
+	{
+		return nullptr;
+	}
+
+	return buffer;
+}
+
+void *efi_calloc_pool(size_t count, size_t size)
+{
+	void *buffer = efi_alloc_pool(count * size);
+
+	if (buffer != nullptr)
+	{
+		memset(buffer, 0, count * size);
+	}
+
+	return buffer;
+}
+
+void efi_free_pool(void *buffer)
+{
+	efi_errno = gBS->FreePool(buffer);
+}
+
+#define KjarnaData EFIX_OS_MEMORY_TYPE(1)
+
+void *efi_mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset)
+{
+	(void)prot;
+	(void)flags;
+	(void)fd;
+	(void)offset;
+
+	EFI_ALLOCATE_TYPE alloc_type = AllocateAnyPages;
+	EFI_MEMORY_TYPE memory_type = KjarnaData;
+
+	void *buffer;
+
+	if (addr != nullptr)
+	{
+		alloc_type = AllocateAddress;
+	}
+
+	efi_errno = gBS->AllocatePages(
+			alloc_type, 
+			memory_type,
+			EFI_SIZE_TO_PAGES(length),
+			(uintptr_t *)&buffer);
+
+	if (EFI_ERROR(efi_errno))
+	{
+		return nullptr;
+	}
+
+	return buffer;
+}
+
+int efi_munmap(void *addr, size_t length)
+{
+	efi_errno = gBS->FreePages((uintptr_t)addr, EFI_SIZE_TO_PAGES(length));
+
+	return !EFI_ERROR(efi_errno) ? 0 : -1;
+}
+
-- 
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