Initial physical page manager

+ Will probably still need a fair bit of tweakind and documentation
improvements, but seems to work outside of the kernel. Also no valgrind
errors, which is quite promising I guess.

3 files changed, 41 insertions, 1 deletions

diff --git a/include/apos/attrs.h b/include/apos/attrs.h
index e088ec9..ae936d9 100644
--- a/include/apos/attrs.h
+++ b/include/apos/attrs.h
@@ -3,7 +3,8 @@
 #define __section(section)	__attribute__((__section__(section)))
 #define __fmt(x, y)		__attribute__((format (__printf__, x, y)))
 #define __noinline		__attribute__((noinline))
-#define __weak			__attribute__((weak))
+#define __noreturn		__attribute__((noreturn))
 #define __packed		__attribute__((packed))
+#define __weak			__attribute__((weak))
 
 #endif /* APOS_COMPILER_ATTRIBUTES_H */
diff --git a/include/apos/bits.h b/include/apos/bits.h
index 77bdde4..79523db 100644
--- a/include/apos/bits.h
+++ b/include/apos/bits.h
@@ -5,4 +5,8 @@
 #define __set_bit(x, y) ((x) |= (y))
 #define __clear_bit(x, y) ((x) &= ~(y))
 
+#define __is_nset(x, y) (__is_set((x), 1 << (y)))
+#define __set_nbit(x, y) (__set_bit((x), 1 << (y)))
+#define __clear_nbit(x, y) (__clear_bit((x), 1 << (y)))
+
 #endif /* APOS_BITS_H */
diff --git a/include/apos/pmem.h b/include/apos/pmem.h
new file mode 100644
index 0000000..ec98cbf
--- /dev/null
+++ b/include/apos/pmem.h
@@ -0,0 +1,35 @@
+#ifndef APOS_PMEM_H
+#define APOS_PMEM_H
+
+#include <apos/types.h>
+
+enum mm_order_t {
+	MM_O0,
+	MM_O1,
+	MM_O2,
+	MM_O3,
+	MM_O4,
+	MM_O5,
+	MM_O6,
+	MM_O7,
+	MM_O8,
+	MM_O9,
+};
+
+typedef size_t paddr_t;
+typedef ssize_t pnum_t;
+
+void update_pmap(paddr_t offset);
+void free_page(enum mm_order_t order, paddr_t paddr);
+void mark_used(enum mm_order_t order, paddr_t paddr);
+paddr_t alloc_page(enum mm_order_t order, paddr_t offset);
+
+#if defined(INIT)
+void populate_pmap(paddr_t ram_base, size_t ram_size, paddr_t cont);
+#endif
+
+#if defined(KERNEL)
+void init_pmap(void *p);
+#endif
+
+#endif /* APOS_PMEM_H */