tm4c123gh6pm: can build an empty app

Rakefile

@@ -179,6 +179,10 @@ when 'k20'
   task :build_all => [:build_blink_k20, :build_blink_k20_isr]
 when 'stm32f4'
   task :build_all => [:build_blink_stm32f4]
-else
+when 'lpc17xx'
   task :build_all => [:build_empty, :build_blink]
+when 'tm4c123gh6pm'
+  task :build_all => [:build_blink_tm4c123gh6pm]
+else
+  puts "I don't know what to build for this platform."
 end

apps/app_blink_tm4c123gh6pm.rs

@@ -0,0 +1,13 @@
+#![feature(phase)]
+#![crate_type="staticlib"]
+#![no_std]
+
+extern crate core;
+extern crate zinc;
+
+#[no_mangle]
+#[no_split_stack]
+#[allow(unused_variable)]
+#[allow(dead_code)]
+pub unsafe fn main() {
+}

platforms.yml

@@ -6,3 +6,5 @@ stm32f4:
   arch:   cortex_m4
 k20:
   arch:   cortex_m4
+tm4c123gh6pm:
+  arch:   cortex_m4

src/zinc/hal/tm4c123gh6pm/iomem.ld

@@ -0,0 +1 @@
+INCLUDE ./src/zinc/hal/cortex_m3/armmem.ld

src/zinc/hal/tm4c123gh6pm/layout.ld

@@ -0,0 +1,17 @@
+__STACK_BASE  = 0x10002000;
+_boot_checksum = 0; /* TODO(farcaller): extract this to lpc code only */
+_data_load = LOADADDR(.data);
+
+INCLUDE ./src/zinc/hal/tm4c123gh6pm/iomem.ld
+
+ENTRY(main)
+
+MEMORY
+{
+    rom(RX)   : ORIGIN = 0x00000000, LENGTH = 0x40000
+    ram(WAIL) : ORIGIN = 0x20000000, LENGTH = 0x8000 /* 32KB SRAM */
+}
+
+REGION_ALIAS("vectors", rom);
+
+INCLUDE ./src/zinc/hal/layout_common.ld