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Diffstat (limited to 'include/stack.h')
| -rw-r--r-- | include/stack.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/include/stack.h b/include/stack.h new file mode 100644 index 00000000..6eedc01d --- /dev/null +++ b/include/stack.h @@ -0,0 +1,92 @@ +/* Copyright 2013-2014 IBM Corp. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + * implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef __STACKFRAME_H +#define __STACKFRAME_H + +#define STACK_ENTRY_OPAL_API 0 /* OPAL call */ +#define STACK_ENTRY_MCHECK 0x0200 /* Machine check */ +#define STACK_ENTRY_HMI 0x0e60 /* Hypervisor maintainance */ +#define STACK_ENTRY_RESET 0x0100 /* System reset */ +#define STACK_ENTRY_SOFTPATCH 0x1500 /* Soft patch (denorm emulation) */ + +/* Portion of the stack reserved for machine checks */ +#define MC_STACK_SIZE 0x1000 + +/* Safety/ABI gap at top of stack */ +#define STACK_TOP_GAP 0x100 + +/* Remaining stack space (gap included) */ +#define NORMAL_STACK_SIZE (STACK_SIZE - MC_STACK_SIZE) + +/* Offset to get to normal CPU stacks */ +#define CPU_STACKS_OFFSET (CPU_STACKS_BASE + \ + NORMAL_STACK_SIZE - STACK_TOP_GAP) + +/* Offset to get to machine check CPU stacks */ +#define CPU_MC_STACKS_OFFSET (CPU_STACKS_BASE + STACK_SIZE - STACK_TOP_GAP) + +#ifndef __ASSEMBLY__ + +#include <stdint.h> + +/* This is the struct used to save GPRs etc.. on OPAL entry + * and from some exceptions. It is not always entirely populated + * depending on the entry type + */ +struct stack_frame { + /* Standard 112-byte stack frame header (the minimum size required, + * using an 8-doubleword param save area). The callee (in C) may use + * lrsave; we declare these here so we don't get our own save area + * overwritten */ + uint64_t backchain; + uint64_t crsave; + uint64_t lrsave; + uint64_t compiler_dw; + uint64_t linker_dw; + uint64_t tocsave; + uint64_t paramsave[8]; + + /* Space for stack-local vars used by asm. At present we only use + * one doubleword. */ + uint64_t locals[1]; + + /* Entry type */ + uint64_t type; + + /* GPR save area + * + * We don't necessarily save everything in here + */ + uint64_t gpr[32]; + + /* Other SPR saved + * + * Only for some exceptions. + */ + uint32_t cr; + uint32_t xer; + uint64_t ctr; + uint64_t lr; + uint64_t pc; + uint64_t cfar; + uint64_t srr0; + uint64_t srr1; +} __attribute__((aligned(16))); + +#endif /* __ASSEMBLY__ */ +#endif /* __STACKFRAME_H */ + |
