diff options
Diffstat (limited to 'arch/metag/include/asm/processor.h')
| -rw-r--r-- | arch/metag/include/asm/processor.h | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/arch/metag/include/asm/processor.h b/arch/metag/include/asm/processor.h deleted file mode 100644 index 9a0c502..0000000 --- a/arch/metag/include/asm/processor.h +++ /dev/null @@ -1,201 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Copyright (C) 2005,2006,2007,2008 Imagination Technologies - */ - -#ifndef __ASM_METAG_PROCESSOR_H -#define __ASM_METAG_PROCESSOR_H - -#include <linux/atomic.h> - -#include <asm/page.h> -#include <asm/ptrace.h> -#include <asm/metag_regs.h> - -/* - * Default implementation of macro that returns current - * instruction pointer ("program counter"). - */ -#define current_text_addr() ({ __label__ _l; _l: &&_l; }) - -/* The task stops where the kernel starts */ -#define TASK_SIZE PAGE_OFFSET -/* Add an extra page of padding at the top of the stack for the guard page. */ -#define STACK_TOP (TASK_SIZE - PAGE_SIZE) -#define STACK_TOP_MAX STACK_TOP -/* Maximum virtual space for stack */ -#define STACK_SIZE_MAX (CONFIG_MAX_STACK_SIZE_MB*1024*1024) - -/* This decides where the kernel will search for a free chunk of vm - * space during mmap's. - */ -#define TASK_UNMAPPED_BASE META_MEMORY_BASE - -typedef struct { - unsigned long seg; -} mm_segment_t; - -#ifdef CONFIG_METAG_FPU -struct meta_fpu_context { - TBICTXEXTFPU fpstate; - union { - struct { - TBICTXEXTBB4 fx8_15; - TBICTXEXTFPACC fpacc; - } fx8_15; - struct { - TBICTXEXTFPACC fpacc; - TBICTXEXTBB4 unused; - } nofx8_15; - } extfpstate; - bool needs_restore; -}; -#else -struct meta_fpu_context {}; -#endif - -#ifdef CONFIG_METAG_DSP -struct meta_ext_context { - struct { - TBIEXTCTX ctx; - TBICTXEXTBB8 bb8; - TBIDUAL ax[TBICTXEXTAXX_BYTES / sizeof(TBIDUAL)]; - TBICTXEXTHL2 hl2; - TBICTXEXTTDPR ext; - TBICTXEXTRP6 rp; - } regs; - - /* DSPRAM A and B save areas. */ - void *ram[2]; - - /* ECH encoded size of DSPRAM save areas. */ - unsigned int ram_sz[2]; -}; -#else -struct meta_ext_context {}; -#endif - -struct thread_struct { - PTBICTX kernel_context; - /* A copy of the user process Sig.SaveMask. */ - unsigned int user_flags; - struct meta_fpu_context *fpu_context; - void __user *tls_ptr; - unsigned short int_depth; - unsigned short txdefr_failure; - struct meta_ext_context *dsp_context; -}; - -#define INIT_THREAD { \ - NULL, /* kernel_context */ \ - 0, /* user_flags */ \ - NULL, /* fpu_context */ \ - NULL, /* tls_ptr */ \ - 1, /* int_depth - we start in kernel */ \ - 0, /* txdefr_failure */ \ - NULL, /* dsp_context */ \ -} - -/* Needed to make #define as we are referencing 'current', that is not visible - * yet. - * - * Stack layout is as below. - - argc argument counter (integer) - argv[0] program name (pointer) - argv[1...N] program args (pointers) - argv[argc-1] end of args (integer) - NULL - env[0...N] environment variables (pointers) - NULL - - */ -#define start_thread(regs, pc, usp) do { \ - unsigned int *argc = (unsigned int *) bprm->exec; \ - current->thread.int_depth = 1; \ - /* Force this process down to user land */ \ - regs->ctx.SaveMask = TBICTX_PRIV_BIT; \ - regs->ctx.CurrPC = pc; \ - regs->ctx.AX[0].U0 = usp; \ - regs->ctx.DX[3].U1 = *((int *)argc); /* argc */ \ - regs->ctx.DX[3].U0 = (int)((int *)argc + 1); /* argv */ \ - regs->ctx.DX[2].U1 = (int)((int *)argc + \ - regs->ctx.DX[3].U1 + 2); /* envp */ \ - regs->ctx.DX[2].U0 = 0; /* rtld_fini */ \ -} 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) -{ -} - -/* - * Return saved PC of a blocked thread. - */ -#define thread_saved_pc(tsk) \ - ((unsigned long)(tsk)->thread.kernel_context->CurrPC) -#define thread_saved_sp(tsk) \ - ((unsigned long)(tsk)->thread.kernel_context->AX[0].U0) -#define thread_saved_fp(tsk) \ - ((unsigned long)(tsk)->thread.kernel_context->AX[1].U0) - -unsigned long get_wchan(struct task_struct *p); - -#define KSTK_EIP(tsk) (task_pt_regs(tsk)->ctx.CurrPC) -#define KSTK_ESP(tsk) (task_pt_regs(tsk)->ctx.AX[0].U0) - -#define user_stack_pointer(regs) ((regs)->ctx.AX[0].U0) - -#define cpu_relax() barrier() - -extern void setup_priv(void); - -static inline unsigned int hard_processor_id(void) -{ - unsigned int id; - - asm volatile ("MOV %0, TXENABLE\n" - "AND %0, %0, %1\n" - "LSR %0, %0, %2\n" - : "=&d" (id) - : "I" (TXENABLE_THREAD_BITS), - "K" (TXENABLE_THREAD_S) - ); - - return id; -} - -#define OP3_EXIT 0 - -#define HALT_OK 0 -#define HALT_PANIC -1 - -/* - * Halt (stop) the hardware thread. This instruction sequence is the - * standard way to cause a Meta hardware thread to exit. The exit code - * is pushed onto the stack which is interpreted by the debug adapter. - */ -static inline void hard_processor_halt(int exit_code) -{ - asm volatile ("MOV D1Ar1, %0\n" - "MOV D0Ar6, %1\n" - "MSETL [A0StP],D0Ar6,D0Ar4,D0Ar2\n" - "1:\n" - "SWITCH #0xC30006\n" - "B 1b\n" - : : "r" (exit_code), "K" (OP3_EXIT)); -} - -/* Set these hooks to call SoC specific code to restart/halt/power off. */ -extern void (*soc_restart)(char *cmd); -extern void (*soc_halt)(void); - -extern void show_trace(struct task_struct *tsk, unsigned long *sp, - struct pt_regs *regs); - -extern const struct seq_operations cpuinfo_op; - -#endif |
