refactor: 📦 Prepare for future Power mod

Power mod is disabled for now.
Needs to become a driver.

machine/src/platform/raspberrypi/device_driver/bcm/mod.rs

@@ -9,6 +9,7 @@ pub mod gpio;
 pub mod interrupt_controller;
 pub mod mini_uart;
 pub mod pl011_uart;
+// pub mod power;
 
 #[cfg(feature = "rpi3")]
 pub use interrupt_controller::*;

machine/src/platform/raspberrypi/device_driver/bcm/power.rs

@@ -59,20 +59,11 @@ pub type Result<T> = ::core::result::Result<T, PowerError>;
 
 type Registers = MMIODerefWrapper<RegisterBlock>;
 
-const POWER_START: usize = 0x0010_0000;
-
 /// Public interface to the Power subsystem
 pub struct Power {
     registers: Registers,
 }
 
-impl Default for Power {
-    fn default() -> Power {
-        const POWER_BASE: usize = BcmHost::get_peripheral_address() + POWER_START;
-        unsafe { Power::new(POWER_BASE) }
-    }
-}
-
 impl Power {
     /// # Safety
     ///

machine/src/platform/raspberrypi/memory/mod.rs

@@ -143,6 +143,7 @@ pub(super) mod map {
     }
 
     pub const VIDEOCORE_MBOX_OFFSET: usize = 0x0000_B880;
+    pub const POWER_OFFSET:          usize = 0x0010_0000;
     pub const GPIO_OFFSET:           usize = 0x0020_0000;
     pub const UART_OFFSET:           usize = 0x0020_1000;
     pub const MINIUART_OFFSET:       usize = 0x0021_5000;
@@ -162,6 +163,9 @@ pub(super) mod map {
         /// Base address of ARM<->VC mailbox area.
         pub const VIDEOCORE_MBOX_BASE: Address<Physical> = Address::new(MMIO_BASE + VIDEOCORE_MBOX_OFFSET);
 
+        /// Board power control.
+        pub const POWER_BASE:          Address<Physical> = Address::new(MMIO_BASE + POWER_OFFSET);
+
         /// Base address of GPIO registers.
         pub const GPIO_BASE:           Address<Physical> = Address::new(MMIO_BASE + GPIO_OFFSET);
         pub const GPIO_SIZE:           usize             =              0xA0;

machine/src/platform/raspberrypi/mod.rs

@@ -12,7 +12,6 @@ pub mod exception;
 pub mod fb;
 pub mod mailbox;
 pub mod memory;
-pub mod power;
 pub mod vc;
 
 /// See BCM2835-ARM-Peripherals.pdf