CM3: add support to the IAR Embedded Workbench(TM) compiler

[bertos.git] / bertos / cpu / cortex-m3 / hw / iar_cm3.S

diff --git a/bertos/cpu/cortex-m3/hw/iar_cm3.S b/bertos/cpu/cortex-m3/hw/iar_cm3.S
new file mode 100644 (file)
index 0000000..c537384
--- /dev/null
+++ b/bertos/cpu/cortex-m3/hw/iar_cm3.S
@@ -0,0 +1,28 @@
+  SECTION .text:CODE(2)
+  
+  ; Exported functions
+  EXPORT CPU_READ_IPSR
+  EXPORT irq_running
+  EXPORT asm_switch_context
+  
+  CPU_READ_IPSR:
+       mrs r0, ipsr
+       bx lr
+  
+  irq_running:
+       mrs r0, msp
+       cmp sp, r0
+       ite ne
+       movne r0, #0x0
+       moveq r0, #0x1
+       bx lr
+  
+  asm_switch_context:
+       mrs r12, psp
+       stmdb r12!, {r4-r11, lr}
+       str r12, [r1]
+       ldr r12, [r0]
+       ldmia r12!, {r4-r11, lr}
+       msr psp, r12
+       bx lr
+   END