X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=bootcensus;a=blobdiff_plain;f=src%2Fmem.h;h=40de366809fb2298a4474d8ce6e784ea7511ca84;hp=a17607b0e4f67f73dd474d9ab9a4a861dcbab0b9;hb=81c11bdd80190ec319a82b0402173cfb65fcbf72;hpb=a7a5ced32b6e0bd417ee7839fac245de29a81fe5

diff --git a/src/mem.h b/src/mem.h
index a17607b..40de366 100644
--- a/src/mem.h
+++ b/src/mem.h
@@ -20,12 +20,28 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 #define ADDR_TO_PAGE(x)			((uint32_t)(x) >> 12)
 #define PAGE_TO_ADDR(x)			((uint32_t)(x) << 12)
+#define PAGE_TO_PTR(x)			((void*)PAGE_TO_ADDR(x))
+
+#define BYTES_TO_PAGES(x)		(((uint32_t)(x) + 4095) >> 12)
+
+/* for alloc_ppage/alloc_ppages */
+enum {
+	MEM_HEAP = 0,	/* start searching from the bottom */
+	MEM_STACK = 1	/* start searching from the top */
+};
 
 void init_mem(void);
 
-int alloc_ppage(void);
+int alloc_ppage(int area);
 void free_ppage(int pg);
 
+/* allocate a number of consecutive pages */
+int alloc_ppages(int count, int area);
+void free_ppages(int pg0, int count);
+
+/* allocate a specific range of pages.
+ * Fails (and returns -1) if any page in the requested range is not free.
+ */
 int alloc_ppage_range(int start, int size);
 int free_ppage_range(int start, int size);