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Diffstat (limited to 'target/linux/ubicom32/files/arch/ubicom32/include/asm/processor.h')
| -rw-r--r-- | target/linux/ubicom32/files/arch/ubicom32/include/asm/processor.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/target/linux/ubicom32/files/arch/ubicom32/include/asm/processor.h b/target/linux/ubicom32/files/arch/ubicom32/include/asm/processor.h new file mode 100644 index 000000000..92e49e81a --- /dev/null +++ b/target/linux/ubicom32/files/arch/ubicom32/include/asm/processor.h @@ -0,0 +1,163 @@ +/* + * arch/ubicom32/include/asm/processor.h + * Thread related definitions for Ubicom32 architecture. + * + * (C) Copyright 2009, Ubicom, Inc. + * Copyright (C) 1995 Hamish Macdonald + * + * This file is part of the Ubicom32 Linux Kernel Port. + * + * The Ubicom32 Linux Kernel Port is free software: you can redistribute + * it and/or modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, either version 2 of the + * License, or (at your option) any later version. + * + * The Ubicom32 Linux Kernel Port is distributed in the hope that it + * will be useful, but WITHOUT ANY WARRANTY; without even the implied + * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See + * the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with the Ubicom32 Linux Kernel Port. If not, + * see <http://www.gnu.org/licenses/>. + * + * Ubicom32 implementation derived from (with many thanks): + * arch/m68knommu + * arch/blackfin + * arch/parisc + */ + +#ifndef _ASM_UBICOM32_PROCESSOR_H +#define _ASM_UBICOM32_PROCESSOR_H + +/* + * Default implementation of macro that returns current + * instruction pointer ("program counter"). + */ +#define current_text_addr() ({ __label__ _l; _l: &&_l;}) + +#include <linux/compiler.h> +#include <linux/threads.h> +#include <asm/types.h> +#include <asm/segment.h> +#include <asm/fpu.h> +#include <asm/ptrace.h> +#include <asm/current.h> +#include <asm/thread_info.h> + +#if defined(CONFIG_UBICOM32_V3) + #define CPU "IP5K" +#endif +#if defined(CONFIG_UBICOM32_V4) + #define CPU "IP7K" +#endif +#ifndef CPU + #define CPU "UNKNOWN" +#endif + +/* + * User space process size: 1st byte beyond user address space. + */ +extern unsigned long memory_end; +#define TASK_SIZE (memory_end) + +/* + * 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 + +/* + * This is the structure where we are going to save callee-saved registers. + * A5 is the return address, A7 is the stack pointer, A6 is the frame + * pointer. This is the frame that is created because of switch_to. This + * is not the frame due to interrupt preemption or because of syscall entry. + */ + +struct thread_struct { + unsigned long d10; /* D10 */ + unsigned long d11; /* D11 */ + unsigned long d12; /* D12 */ + unsigned long d13; /* D13 */ + unsigned long a1; /* A1 */ + unsigned long a2; /* A2 */ + unsigned long a5; /* A5 return address. */ + unsigned long a6; /* A6 */ + unsigned long sp; /* A7 kernel stack pointer. */ +}; + +#define INIT_THREAD { \ + 0, 0, 0, 0, 0, 0, 0, 0, \ + sizeof(init_stack) + (unsigned long) init_stack - 8, \ +} + +/* + * Do necessary setup to start up a newly executed thread. + * + * pass the data segment into user programs if it exists, + * it can't hurt anything as far as I can tell + */ +/* + * Do necessary setup to start up a newly executed thread. + */ +#define start_thread(regs, new_pc, new_sp) \ + do { \ + regs->pc = new_pc & ~3; \ + regs->an[5] = new_pc & ~3; \ + regs->an[7] = new_sp; \ + regs->nesting_level = -1; \ + regs->frame_type = UBICOM32_FRAME_TYPE_NEW_THREAD; \ + regs->thread_type = NORMAL_THREAD; \ + } while(0) + +/* Forward declaration, a strange C thing */ +struct task_struct; + +/* 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); + +/* + * Free current thread data structures etc.. + */ +static inline void exit_thread(void) +{ +} + +unsigned long thread_saved_pc(struct task_struct *tsk); +unsigned long get_wchan(struct task_struct *p); + +#define KSTK_EIP(tsk) (tsk->thread.a5) +#define KSTK_ESP(tsk) (tsk->thread.sp) + +#define cpu_relax() barrier() + +extern void processor_init(void); +extern unsigned int processor_timers(void); +extern unsigned int processor_threads(void); +extern unsigned int processor_frequency(void); +extern int processor_interrupts(unsigned int *int0, unsigned int *int1); +extern void processor_ocm(unsigned long *socm, unsigned long *eocm); +extern void processor_dram(unsigned long *sdram, unsigned long *edram); + +#define THREAD_SIZE_LONGS (THREAD_SIZE/sizeof(unsigned long)) +#define KSTK_TOP(info) \ +({ \ + unsigned long *__ptr = (unsigned long *)(info); \ + (unsigned long)(&__ptr[THREAD_SIZE_LONGS]); \ +}) + +#define task_pt_regs(task) \ +({ \ + struct pt_regs *__regs__; \ + __regs__ = (struct pt_regs *)(KSTK_TOP(task_stack_page(task))-8); \ + __regs__ - 1; \ +}) + +#endif /* _ASM_UBICOM32_PROCESSOR_H */ |