maybe finish memory server

lib/aos/init.c

@@ -25,6 +25,7 @@
 #include <aos/paging.h>
 #include <aos/systime.h>
 #include <barrelfish_kpi/domain_params.h>
+#include <mm/mm.h>
 
 #include "threads_priv.h"
 #include "init.h"
@@ -243,6 +244,8 @@ errval_t barrelfish_init_onthread(struct spawn_domain_params *params)
 
     /* TODO MILESTONE 3: now we should have a channel with init set up and can
      * use it for the ram allocator */
+    //afeer: script page 135, tell domain to use our memserver.
+    err = ram_alloc_set(NULL);
 
     // right now we don't have the nameservice & don't need the terminal
     // and domain spanning, so we return here

lib/spawn/rpc_server.c

@@ -121,15 +121,22 @@ static errval_t handle_rpc_get_ram_cap(
     struct capref arg_cap, size_t arg_size, uintptr_t arg0, uintptr_t arg1,
     struct capref *ret_cap, size_t *ret_size, uintptr_t *ret0, uintptr_t *ret1
 ) {
+    errval_t err;
+
     size_t bytes = arg0;
     size_t alignment = arg1;
 
-    grading_rpc_handler_ram_cap(bytes, alignment);
-
-    // TODO
+    err = ram_alloc_aligned(ret_cap, bytes, alignment);
+    if (err_is_fail(err)) return err;
     *ret0 = bytes;
 
-    return LIB_ERR_NOT_IMPLEMENTED;
+    char buf[256];
+    debug_print_cap_at_capref(buf, 256, *ret_cap);
+    debug_printf("cap allocated by memserver: %s\n", buf);
+
+    grading_rpc_handler_ram_cap(bytes, alignment);
+
+    return SYS_ERR_OK;
 }
 
 static errval_t handle_rpc_serial_getchar(

usr/memeater/main.c

@@ -51,6 +51,10 @@ static errval_t request_and_map_memory(void)
         return err;
     }
 
+    char buf[256];
+    debug_print_cap_at_capref(buf, 256, cap1);
+    debug_printf("cap from rpc: %s\n", buf);
+
     struct capref cap1_frame;
     err = slot_alloc(&cap1_frame);
     assert(err_is_ok(err));
@@ -70,7 +74,7 @@ static errval_t request_and_map_memory(void)
     void *buf1;
     err = paging_map_frame(pstate, &buf1, BASE_PAGE_SIZE, cap1_frame);
     if (err_is_fail(err)) {
-        DEBUG_ERR(err, "could not get BASE_PAGE_SIZE cap\n");
+        DEBUG_ERR(err, "could not map BASE_PAGE_SIZE cap\n");
         return err;
     }