From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001 From: Yuval Adam <_@yuv.al> Date: Wed, 30 Aug 2017 08:25:59 +0000 Subject: Initial file dump from open source release --- arch/metag/kernel/head.S | 65 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 arch/metag/kernel/head.S (limited to 'arch/metag/kernel/head.S') diff --git a/arch/metag/kernel/head.S b/arch/metag/kernel/head.S new file mode 100644 index 00000000..713f71d1 --- /dev/null +++ b/arch/metag/kernel/head.S @@ -0,0 +1,65 @@ + ! Copyright 2005,2006,2007,2009 Imagination Technologies + +#include +#include +#include +#undef __exit + + __HEAD + ! Setup the stack and get going into _metag_start_kernel + .global __start + .type __start,function +__start: + ! D1Ar1 contains pTBI (ISTAT) + ! D0Ar2 contains pTBI + ! D1Ar3 contains __pTBISegs + ! D0Ar4 contains kernel arglist pointer + + MOVT D0Re0,#HI(___pTBIs) + ADD D0Re0,D0Re0,#LO(___pTBIs) + SETL [D0Re0],D0Ar2,D1Ar1 + MOVT D0Re0,#HI(___pTBISegs) + ADD D0Re0,D0Re0,#LO(___pTBISegs) + SETD [D0Re0],D1Ar3 + MOV A0FrP,#0 + MOV D0Re0,#0 + MOV D1Re0,#0 + MOV D1Ar3,#0 + MOV D1Ar1,D0Ar4 !Store kernel boot params + MOV D1Ar5,#0 + MOV D0Ar6,#0 +#ifdef CONFIG_METAG_DSP + MOV D0.8,#0 +#endif + MOVT A0StP,#HI(_init_thread_union) + ADD A0StP,A0StP,#LO(_init_thread_union) + ADD A0StP,A0StP,#THREAD_INFO_SIZE + MOVT D1RtP,#HI(_metag_start_kernel) + CALL D1RtP,#LO(_metag_start_kernel) + .size __start,.-__start + + !! Needed by TBX + .global __exit + .type __exit,function +__exit: + XOR TXENABLE,D0Re0,D0Re0 + .size __exit,.-__exit + +#ifdef CONFIG_SMP + .global _secondary_startup + .type _secondary_startup,function +_secondary_startup: +#if CONFIG_PAGE_OFFSET < LINGLOBAL_BASE + ! In case GCOn has just been turned on we need to fence any writes that + ! the boot thread might have performed prior to coherency taking effect. + MOVT D0Re0,#HI(LINSYSEVENT_WR_ATOMIC_UNLOCK) + MOV D1Re0,#0 + SETD [D0Re0], D1Re0 +#endif + MOVT A0StP,#HI(_secondary_data_stack) + ADD A0StP,A0StP,#LO(_secondary_data_stack) + GETD A0StP,[A0StP] + ADD A0StP,A0StP,#THREAD_INFO_SIZE + B _secondary_start_kernel + .size _secondary_startup,.-_secondary_startup +#endif -- cgit v1.3.1