Reorganize mammoth lib in rust.

rust/lib/mammoth/src/init.rs

@@ -0,0 +1,42 @@
+use crate::syscall;
+use crate::zion;
+use crate::zion::z_cap_t;
+use core::ffi::c_void;
+
+// From /zion/include/ztypes.h
+const Z_INIT_SELF_PROC: u64 = 0x4000_0000;
+const Z_INIT_SELF_VMAS: u64 = 0x4000_0001;
+const Z_INIT_ENDPOINT: u64 = 0x4100_0000;
+
+pub static mut SELF_PROC_CAP: z_cap_t = 0;
+pub static mut SELF_VMAS_CAP: z_cap_t = 0;
+pub static mut INIT_ENDPOINT: z_cap_t = 0;
+
+pub fn parse_init_port(port_cap: z_cap_t) {
+    loop {
+        let mut num_bytes: u64 = 8;
+        let mut init_sig: u64 = 0;
+        let mut caps: [u64; 1] = [0];
+        let mut num_caps: u64 = 1;
+
+        let req = zion::ZPortPollReq {
+            port_cap,
+            num_bytes: &mut num_bytes as *mut u64,
+            data: &mut init_sig as *mut u64 as *mut c_void,
+            caps: &mut caps as *mut u64,
+            num_caps: &mut num_caps as *mut u64,
+        };
+        let resp = syscall::syscall(zion::kZionPortPoll, &req);
+        if let Err(_) = resp {
+            break;
+        }
+        unsafe {
+            match init_sig {
+                Z_INIT_SELF_PROC => SELF_PROC_CAP = caps[0],
+                Z_INIT_SELF_VMAS => SELF_VMAS_CAP = caps[0],
+                Z_INIT_ENDPOINT => INIT_ENDPOINT = caps[0],
+                _ => syscall::debug("Unknown Cap in Init"),
+            }
+        }
+    }
+}