bb8187d35f
Hardware with MCA bus is limited to 386 and 486 class machines that are now 20+ years old and typically with less than 32MB of memory. A quick search on the internet, and you see that even the MCA hobbyist/enthusiast community has lost interest in the early 2000 era and never really even moved ahead from the 2.4 kernels to the 2.6 series. This deletes anything remaining related to CONFIG_MCA from core kernel code and from the x86 architecture. There is no point in carrying this any further into the future. One complication to watch for is inadvertently scooping up stuff relating to machine check, since there is overlap in the TLA name space (e.g. arch/x86/boot/mca.c). Cc: Thomas Gleixner <tglx@linutronix.de> Cc: James Bottomley <JBottomley@Parallels.com> Cc: x86@kernel.org Acked-by: Ingo Molnar <mingo@elte.hu> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
151 lines
4 KiB
C
151 lines
4 KiB
C
/* processor.h: FRV processor definitions
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*
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* Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _ASM_PROCESSOR_H
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#define _ASM_PROCESSOR_H
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#include <asm/mem-layout.h>
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#ifndef __ASSEMBLY__
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/*
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* Default implementation of macro that returns current
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* instruction pointer ("program counter").
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*/
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#define current_text_addr() ({ __label__ _l; _l: &&_l;})
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#include <linux/compiler.h>
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#include <linux/linkage.h>
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#include <asm/sections.h>
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#include <asm/segment.h>
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#include <asm/fpu.h>
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#include <asm/registers.h>
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#include <asm/ptrace.h>
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#include <asm/current.h>
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#include <asm/cache.h>
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/* Forward declaration, a strange C thing */
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struct task_struct;
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/*
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* CPU type and hardware bug flags. Kept separately for each CPU.
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*/
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struct cpuinfo_frv {
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#ifdef CONFIG_MMU
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unsigned long *pgd_quick;
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unsigned long *pte_quick;
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unsigned long pgtable_cache_sz;
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#endif
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} __cacheline_aligned;
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extern struct cpuinfo_frv __nongprelbss boot_cpu_data;
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#define cpu_data (&boot_cpu_data)
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#define current_cpu_data boot_cpu_data
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/*
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* Bus types
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*/
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#define EISA_bus 0
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struct thread_struct {
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struct pt_regs *frame; /* [GR28] exception frame ptr for this thread */
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struct task_struct *curr; /* [GR29] current pointer for this thread */
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unsigned long sp; /* [GR1 ] kernel stack pointer */
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unsigned long fp; /* [GR2 ] kernel frame pointer */
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unsigned long lr; /* link register */
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unsigned long pc; /* program counter */
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unsigned long gr[12]; /* [GR16-GR27] */
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unsigned long sched_lr; /* LR from schedule() */
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union {
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struct pt_regs *frame0; /* top (user) stack frame */
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struct user_context *user; /* userspace context */
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};
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} __attribute__((aligned(8)));
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extern struct pt_regs *__kernel_frame0_ptr;
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extern struct task_struct *__kernel_current_task;
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#endif
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#ifndef __ASSEMBLY__
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#define INIT_THREAD_FRAME0 \
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((struct pt_regs *) \
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(sizeof(init_stack) + (unsigned long) init_stack - sizeof(struct user_context)))
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#define INIT_THREAD { \
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NULL, \
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(struct task_struct *) init_stack, \
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0, 0, 0, 0, \
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{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, \
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0, \
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{ INIT_THREAD_FRAME0 }, \
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}
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/*
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* do necessary setup to start up a newly executed thread.
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* - need to discard the frame stacked by init() invoking the execve syscall
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*/
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#define start_thread(_regs, _pc, _usp) \
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do { \
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__frame = __kernel_frame0_ptr; \
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__frame->pc = (_pc); \
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__frame->psr &= ~PSR_S; \
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__frame->sp = (_usp); \
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} while(0)
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extern void prepare_to_copy(struct task_struct *tsk);
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/* Free all resources held by a thread. */
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static inline void release_thread(struct task_struct *dead_task)
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{
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}
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extern asmlinkage int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
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extern asmlinkage void save_user_regs(struct user_context *target);
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extern asmlinkage void *restore_user_regs(const struct user_context *target, ...);
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#define copy_segments(tsk, mm) do { } while (0)
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#define release_segments(mm) do { } while (0)
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#define forget_segments() do { } while (0)
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/*
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* Free current thread data structures etc..
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*/
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static inline void exit_thread(void)
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{
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}
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/*
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* Return saved PC of a blocked thread.
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*/
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extern unsigned long thread_saved_pc(struct task_struct *tsk);
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unsigned long get_wchan(struct task_struct *p);
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#define KSTK_EIP(tsk) ((tsk)->thread.frame0->pc)
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#define KSTK_ESP(tsk) ((tsk)->thread.frame0->sp)
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/* Allocation and freeing of basic task resources. */
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extern struct task_struct *alloc_task_struct_node(int node);
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extern void free_task_struct(struct task_struct *p);
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#define cpu_relax() barrier()
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/* data cache prefetch */
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#define ARCH_HAS_PREFETCH
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static inline void prefetch(const void *x)
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{
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asm volatile("dcpl %0,gr0,#0" : : "r"(x));
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}
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_PROCESSOR_H */
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