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/* * Copyright 2010-2011 Freescale Semiconductor, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License, version 2, as * published by the Free Software Foundation. */ #ifndef ASM_KVM_BOOKE_HV_ASM_H #define ASM_KVM_BOOKE_HV_ASM_H #ifdef __ASSEMBLY__ /* * All exceptions from guest state must go through KVM * (except for those which are delivered directly to the guest) -- * there are no exceptions for which we fall through directly to * the normal host handler. * * 32-bit host * Expected inputs (normal exceptions): * SCRATCH0 = saved r10 * r10 = thread struct * r11 = appropriate SRR1 variant (currently used as scratch) * r13 = saved CR * *(r10 + THREAD_NORMSAVE(0)) = saved r11 * *(r10 + THREAD_NORMSAVE(2)) = saved r13 * * Expected inputs (crit/mcheck/debug exceptions): * appropriate SCRATCH = saved r8 * r8 = exception level stack frame * r9 = *(r8 + _CCR) = saved CR * r11 = appropriate SRR1 variant (currently used as scratch) * *(r8 + GPR9) = saved r9 * *(r8 + GPR10) = saved r10 (r10 not yet clobbered) * *(r8 + GPR11) = saved r11 * * 64-bit host * Expected inputs (GEN/GDBELL/DBG/MC exception types): * r10 = saved CR * r13 = PACA_POINTER * *(r13 + PACA_EX##type + EX_R10) = saved r10 * *(r13 + PACA_EX##type + EX_R11) = saved r11 * SPRN_SPRG_##type##_SCRATCH = saved r13 * * Expected inputs (CRIT exception type): * r10 = saved CR * r13 = PACA_POINTER * *(r13 + PACA_EX##type + EX_R10) = saved r10 * *(r13 + PACA_EX##type + EX_R11) = saved r11 * *(r13 + PACA_EX##type + EX_R13) = saved r13 * * Expected inputs (TLB exception type): * r10 = saved CR * r13 = PACA_POINTER * *(r13 + PACA_EX##type + EX_TLB_R10) = saved r10 * *(r13 + PACA_EX##type + EX_TLB_R11) = saved r11 * SPRN_SPRG_GEN_SCRATCH = saved r13 * * Only the bolted version of TLB miss exception handlers is supported now. */ .macro DO_KVM intno srr1 #ifdef CONFIG_KVM_BOOKE_HV BEGIN_FTR_SECTION mtocrf 0x80, r11 /* check MSR[GS] without clobbering reg */ bf 3, 1975f b kvmppc_handler_\intno\()_\srr1 1975: END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV) #endif .endm #endif /*__ASSEMBLY__ */ #endif /* ASM_KVM_BOOKE_HV_ASM_H */