aa64: finalise context switch, page fault handler and syscall

[lunaix-os.git] / lunaix-os / arch / aarch64 / includes / asm / abi.h

diff --git a/lunaix-os/arch/aarch64/includes/asm/abi.h b/lunaix-os/arch/aarch64/includes/asm/abi.h
index c5dc081b4973a9633c218a00a4d6c351e1d7c591..dac3d269a0188674c2c12d9c7583414795f8cf38 100644 (file)
--- a/lunaix-os/arch/aarch64/includes/asm/abi.h
+++ b/lunaix-os/arch/aarch64/includes/asm/abi.h
@@ -4,11 +4,22 @@
 #include <lunaix/types.h>
 
 #ifndef __ASM__
-#define align_stack(ptr) ((ptr) & stack_alignment)
+
+#include <asm/aa64_msrs.h>
+#include <asm/aa64_spsr.h>
+
+#define align_stack(ptr) ((ptr) & ~15)
+
+#define store_retval(retval) \
+            current_thread->hstate->registers.x[0] = (retval)
+
+#define store_retval_to(th, retval) \
+            (th)->hstate->registers.x[0] = (retval)
+
 
 static inline void must_inline noret
-switch_context() {
-    // TODO
+switch_context() 
+{
     asm ("b _aa64_switch_task");
     unreachable;
 }
@@ -29,6 +40,25 @@ abi_get_retaddrat(ptr_t fp)
     return ((ptr_t*)fp)[1];
 }
 
+static inline ptr_t must_inline
+abi_get_callframe()
+{
+    ptr_t val;
+    asm volatile("mov %0, fp" : "=r"(val));
+    return val;
+}
+
+static inline void must_inline 
+j_usr(ptr_t sp, ptr_t pc) 
+{
+    set_sysreg(SPSR_EL1, SPSR_EL0_preset);
+    set_sysreg(SP_EL0, sp);
+    set_sysreg(ELR_E1, pc);
+    asm ("eret");
+
+    unreachable;
+}
+
 #endif
 
 #endif /* __LUNAIX_AA64_ABI_H */