Add host startup options support to Grapefruit (#1984)

This is part of #1983

app/grapefruit/app.toml

@@ -109,6 +109,7 @@ max-sizes = {flash = 8192, ram = 2048}
 start = true
 # task-slots is explicitly empty: packrat should not send IPCs!
 task-slots = []
+features = ["grapefruit", "boot-kmdb"]
 
 [tasks.hiffy]
 name = "task-hiffy"

task/packrat/Cargo.toml

@@ -26,6 +26,7 @@ build-util = { path = "../../build/util" }
 
 [features]
 gimlet = ["drv-cpu-seq-api"]
+grapefruit = []
 boot-kmdb = []
 no-ipc-counters = ["idol/no-counters"]
 

task/packrat/src/grapefruit.rs

@@ -0,0 +1,46 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+//! Grapefruit-specific packrat data.
+
+use task_packrat_api::HostStartupOptions;
+
+pub(crate) struct GrapefruitData {
+    host_startup_options: HostStartupOptions,
+}
+
+const fn default_host_startup_options() -> HostStartupOptions {
+    if cfg!(feature = "boot-kmdb") {
+        // We have to do this because const fn.
+        let bits = HostStartupOptions::STARTUP_KMDB.bits()
+            | HostStartupOptions::STARTUP_PROM.bits()
+            | HostStartupOptions::STARTUP_VERBOSE.bits()
+            | HostStartupOptions::STARTUP_BOOT_RAMDISK.bits();
+        match HostStartupOptions::from_bits(bits) {
+            Some(options) => options,
+            None => panic!("must be valid at compile-time"),
+        }
+    } else {
+        HostStartupOptions::empty()
+    }
+}
+
+impl GrapefruitData {
+    pub(crate) fn new() -> Self {
+        Self {
+            host_startup_options: default_host_startup_options(),
+        }
+    }
+
+    pub(crate) fn host_startup_options(&self) -> HostStartupOptions {
+        self.host_startup_options
+    }
+
+    pub(crate) fn set_host_startup_options(
+        &mut self,
+        options: HostStartupOptions,
+    ) {
+        self.host_startup_options = options;
+    }
+}

task/packrat/src/main.rs

@@ -42,6 +42,9 @@ use userlib::RecvMessage;
 #[cfg(feature = "gimlet")]
 mod gimlet;
 
+#[cfg(feature = "grapefruit")]
+mod grapefruit;
+
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
 #[allow(dead_code)] // not all variants are used, depending on cargo features
 enum Trace {
@@ -111,6 +114,8 @@ fn main() -> ! {
         identity,
         #[cfg(feature = "gimlet")]
         gimlet_data: gimlet::GimletData::new(gimlet_bufs),
+        #[cfg(feature = "grapefruit")]
+        grapefruit_data: grapefruit::GrapefruitData::new(),
     };
 
     let mut buffer = [0; idl::INCOMING_SIZE];
@@ -124,6 +129,8 @@ struct ServerImpl {
     identity: &'static mut Option<VpdIdentity>,
     #[cfg(feature = "gimlet")]
     gimlet_data: gimlet::GimletData,
+    #[cfg(feature = "grapefruit")]
+    grapefruit_data: grapefruit::GrapefruitData,
 }
 
 impl ServerImpl {
@@ -204,7 +211,15 @@ impl idl::InOrderPackratImpl for ServerImpl {
         Ok(self.gimlet_data.host_startup_options())
     }
 
-    #[cfg(not(feature = "gimlet"))]
+    #[cfg(feature = "grapefruit")]
+    fn get_next_boot_host_startup_options(
+        &mut self,
+        _: &RecvMessage,
+    ) -> Result<HostStartupOptions, RequestError<Infallible>> {
+        Ok(self.grapefruit_data.host_startup_options())
+    }
+
+    #[cfg(not(any(feature = "gimlet", feature = "grapefruit")))]
     fn get_next_boot_host_startup_options(
         &mut self,
         _: &RecvMessage,
@@ -228,7 +243,21 @@ impl idl::InOrderPackratImpl for ServerImpl {
         Ok(())
     }
 
-    #[cfg(not(feature = "gimlet"))]
+    #[cfg(feature = "grapefruit")]
+    fn set_next_boot_host_startup_options(
+        &mut self,
+        _: &RecvMessage,
+        host_startup_options: HostStartupOptions,
+    ) -> Result<(), RequestError<Infallible>> {
+        ringbuf_entry!(Trace::SetNextBootHostStartupOptions(
+            host_startup_options
+        ));
+        self.grapefruit_data
+            .set_host_startup_options(host_startup_options);
+        Ok(())
+    }
+
+    #[cfg(not(any(feature = "gimlet", feature = "grapefruit")))]
     fn set_next_boot_host_startup_options(
         &mut self,
         _: &RecvMessage,