47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
/*
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* Copyright 2005-2006, Haiku Inc. All rights reserved.
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* Distributed under the terms of the MIT License.
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*
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* Authors:
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* Axel Dörfler <axeld@pinc-software.de>
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* Ingo Weinhold <bonefish@cs.tu-berlin.de>
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*/
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#ifndef _KERNEL_ARCH_PPC_INT_H
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#define _KERNEL_ARCH_PPC_INT_H
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#include <SupportDefs.h>
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#define NUM_IO_VECTORS 256
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/* The sprg0 register of each CPU points to the physical address of such
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a structure. So it is at hand in the early exception handling code.
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*/
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struct ppc_cpu_exception_context {
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void *kernel_handle_exception; // exception handler routine in the
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// kernel
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void *exception_context; // the virtual address of this
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// structure
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void *kernel_stack; // kernel stack for the current thread
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uint32 scratch[8]; // scratch memory for free use in the
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// early exception handling code
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct ppc_cpu_exception_context *ppc_get_cpu_exception_context(int cpu);
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void ppc_set_current_cpu_exception_context(
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struct ppc_cpu_exception_context *context);
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// only called once per CPU
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#ifdef __cplusplus
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}
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#endif
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#endif /* _KERNEL_ARCH_PPC_INT_H */
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