mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-28 04:17:47 +00:00
6a846f3f82
Disintegrate asm/system.h for C6X. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Mark Salter <msalter@redhat.com> cc: linux-c6x-dev@linux-c6x.org
142 lines
3.7 KiB
C
142 lines
3.7 KiB
C
/*
|
|
* Port on Texas Instruments TMS320C6x architecture
|
|
*
|
|
* Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
|
|
* Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
|
|
*
|
|
* Updated for 2.6.34: Mark Salter <msalter@redhat.com>
|
|
*
|
|
* 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_C6X_PROCESSOR_H
|
|
#define _ASM_C6X_PROCESSOR_H
|
|
|
|
#include <asm/ptrace.h>
|
|
#include <asm/page.h>
|
|
#include <asm/current.h>
|
|
|
|
/*
|
|
* Default implementation of macro that returns current
|
|
* instruction pointer ("program counter").
|
|
*/
|
|
#define current_text_addr() \
|
|
({ \
|
|
void *__pc; \
|
|
asm("mvc .S2 pce1,%0\n" : "=b"(__pc)); \
|
|
__pc; \
|
|
})
|
|
|
|
/*
|
|
* User space process size. This is mostly meaningless for NOMMU
|
|
* but some C6X processors may have RAM addresses up to 0xFFFFFFFF.
|
|
* Since calls like mmap() can return an address or an error, we
|
|
* have to allow room for error returns when code does something
|
|
* like:
|
|
*
|
|
* addr = do_mmap(...)
|
|
* if ((unsigned long)addr >= TASK_SIZE)
|
|
* ... its an error code, not an address ...
|
|
*
|
|
* Here, we allow for 4096 error codes which means we really can't
|
|
* use the last 4K page on systems with RAM extending all the way
|
|
* to the end of the 32-bit address space.
|
|
*/
|
|
#define TASK_SIZE 0xFFFFF000
|
|
|
|
/*
|
|
* This decides where the kernel will search for a free chunk of vm
|
|
* space during mmap's. We won't be using it
|
|
*/
|
|
#define TASK_UNMAPPED_BASE 0
|
|
|
|
struct thread_struct {
|
|
unsigned long long b15_14;
|
|
unsigned long long a15_14;
|
|
unsigned long long b13_12;
|
|
unsigned long long a13_12;
|
|
unsigned long long b11_10;
|
|
unsigned long long a11_10;
|
|
unsigned long long ricl_icl;
|
|
unsigned long usp; /* user stack pointer */
|
|
unsigned long pc; /* kernel pc */
|
|
unsigned long wchan;
|
|
};
|
|
|
|
#define INIT_THREAD \
|
|
{ \
|
|
.usp = 0, \
|
|
.wchan = 0, \
|
|
}
|
|
|
|
#define INIT_MMAP { \
|
|
&init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, \
|
|
NULL, NULL }
|
|
|
|
#define task_pt_regs(task) \
|
|
((struct pt_regs *)(THREAD_START_SP + task_stack_page(task)) - 1)
|
|
|
|
#define alloc_kernel_stack() __get_free_page(GFP_KERNEL)
|
|
#define free_kernel_stack(page) free_page((page))
|
|
|
|
|
|
/* Forward declaration, a strange C thing */
|
|
struct task_struct;
|
|
|
|
extern void start_thread(struct pt_regs *regs, unsigned int pc,
|
|
unsigned long usp);
|
|
|
|
/* Free all resources held by a thread. */
|
|
static inline void release_thread(struct task_struct *dead_task)
|
|
{
|
|
}
|
|
|
|
/* Prepare to copy thread state - unlazy all lazy status */
|
|
#define prepare_to_copy(tsk) do { } while (0)
|
|
|
|
extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
|
|
|
|
#define copy_segments(tsk, mm) do { } while (0)
|
|
#define release_segments(mm) do { } while (0)
|
|
|
|
/*
|
|
* saved PC of a blocked thread.
|
|
*/
|
|
#define thread_saved_pc(tsk) (task_pt_regs(tsk)->pc)
|
|
|
|
/*
|
|
* saved kernel SP and DP of a blocked thread.
|
|
*/
|
|
#ifdef _BIG_ENDIAN
|
|
#define thread_saved_ksp(tsk) \
|
|
(*(unsigned long *)&(tsk)->thread.b15_14)
|
|
#define thread_saved_dp(tsk) \
|
|
(*(((unsigned long *)&(tsk)->thread.b15_14) + 1))
|
|
#else
|
|
#define thread_saved_ksp(tsk) \
|
|
(*(((unsigned long *)&(tsk)->thread.b15_14) + 1))
|
|
#define thread_saved_dp(tsk) \
|
|
(*(unsigned long *)&(tsk)->thread.b15_14)
|
|
#endif
|
|
|
|
extern unsigned long get_wchan(struct task_struct *p);
|
|
|
|
#define KSTK_EIP(task) (task_pt_regs(task)->pc)
|
|
#define KSTK_ESP(task) (task_pt_regs(task)->sp)
|
|
|
|
#define cpu_relax() do { } while (0)
|
|
|
|
extern const struct seq_operations cpuinfo_op;
|
|
|
|
/* Reset the board */
|
|
#define HARD_RESET_NOW()
|
|
|
|
extern unsigned int c6x_core_freq;
|
|
|
|
|
|
extern void (*c6x_restart)(void);
|
|
extern void (*c6x_halt)(void);
|
|
|
|
#endif /* ASM_C6X_PROCESSOR_H */
|