/*
 * Copyright 2005-2006, Haiku Inc. All rights reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *              Axel Dörfler <axeld@pinc-software.de>
 *              Ingo Weinhold <bonefish@cs.tu-berlin.de>
 */
#ifndef _KERNEL_ARCH_PPC_INT_H
#define _KERNEL_ARCH_PPC_INT_H

#include <SupportDefs.h>

#define NUM_IO_VECTORS  256

/* The sprg0 register of each CPU points to the physical address of such
   a structure. So it is at hand in the early exception handling code.
*/
struct ppc_cpu_exception_context {
        void    *kernel_handle_exception;       // exception handler routine in the
                                                                                // kernel
        void    *exception_context;                     // the virtual address of this
                                                                                // structure
        void    *kernel_stack;                          // kernel stack for the current thread

        uint32  scratch[8];                                     // scratch memory for free use in the
                                                                                // early exception handling code
};

#ifdef __cplusplus
extern "C" {
#endif


struct ppc_cpu_exception_context *ppc_get_cpu_exception_context(int cpu);

void ppc_set_current_cpu_exception_context(
        struct ppc_cpu_exception_context *context);
                // only called once per CPU


#ifdef __cplusplus
}
#endif

#endif /* _KERNEL_ARCH_PPC_INT_H */