Massive backlog of changes

include/platform/context.h

@@ -0,0 +1,9 @@
+#pragma once
+
+void *initialize_context(void *task_entry);
+
+void destroy_context(void *ctx);
+
+void save_context(struct process_context_t *context, void *ptr);
+
+void load_context(struct process_context_t *context);

include/platform/interrupts.h

@@ -0,0 +1,20 @@
+#pragma once
+
+/**
+ * @brief 
+ * 
+ * @return int 
+ */
+int initialize_interrupts();
+
+/**
+ * @brief 
+ * 
+ */
+void irq_enable();
+
+/**
+ * @brief 
+ * 
+ */
+void irq_disable();

include/platform/paging.h

@@ -0,0 +1,96 @@
+#pragma once
+
+#include "types/physaddr.h"
+#include <stddef.h>
+
+enum page_flag_t
+{
+    PAGE_RW = 1,
+    PAGE_EXECUTABLE = 1 << 1,
+    PAGE_USERMODE = 1 << 2,
+    PAGE_PRESENT = 1 << 16,
+    PAGE_ANON = 1 << 17,
+    PAGE_COPY_ON_WRITE = 1 << 18
+};
+
+const size_t page_table_levels;
+
+/**
+ * @brief 
+ * 
+ * @param table 
+ * @return int 
+ */
+int paging_init_top_table(physaddr_t table);
+
+/**
+ * @brief Returns the physical address of the top-level page table currently in
+ * use.
+ * 
+ * @return physaddr_t 
+ */
+physaddr_t paging_current_address_space();
+
+/**
+ * @brief Load an existing top-level page table
+ * 
+ * @param table 
+ */
+void paging_load_address_space(physaddr_t table);
+
+/**
+ * @brief Get the pte type object
+ * 
+ * @param page 
+ * @param level 
+ * @return int 
+ */
+int get_pte_type(void *page, int level);
+
+/**
+ * @brief Set the pte type object
+ * 
+ * @param page 
+ * @param level 
+ * @param flags 
+ * @return int 
+ */
+int set_pte_type(void *page, int level, int flags);
+
+/**
+ * @brief Get the pte address object
+ * 
+ * @param page 
+ * @param level 
+ * @return physaddr_t 
+ */
+physaddr_t get_pte_address(void *page, int level);
+
+/**
+ * @brief Set the pte address object
+ * 
+ * @param page 
+ * @param level 
+ * @param addr 
+ * @return int 
+ */
+int set_pte_address(void *page, int level, physaddr_t addr);
+
+/**
+ * @brief Set the pte object
+ * 
+ * @param page 
+ * @param level 
+ * @param flags 
+ * @param addr 
+ * @return int 
+ */
+int set_pte(void *page, int level, int flags, physaddr_t addr);
+
+/**
+ * @brief Resets all entries in the same table as the specified entry
+ * 
+ * @param page 
+ * @param level 
+ */
+void wipe_page_table(void *page, int level);

include/platform/putc.h

@@ -0,0 +1,24 @@
+#pragma once
+
+/**
+ * @brief Prepare to output characters to the screen.
+ * 
+ * @return int 
+ */
+int initialize_screen();
+
+/**
+ * @brief Write a single character to the screen.
+ * 
+ * @param c 
+ * @return int 
+ */
+int putchar(int c);
+
+/**
+ * @brief Write a string to the screen.
+ * 
+ * @param str 
+ * @return int 
+ */
+int puts(const char *str);