288 lines
8.2 KiB
C
288 lines
8.2 KiB
C
#ifndef _ASM_POWERPC_PROCESSOR_H
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#define _ASM_POWERPC_PROCESSOR_H
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/*
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* Copyright (C) 2001 PPC 64 Team, IBM Corp
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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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#include <linux/config.h>
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#include <asm/reg.h>
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#ifndef __ASSEMBLY__
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#include <linux/compiler.h>
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#include <asm/ptrace.h>
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#include <asm/types.h>
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/* We do _not_ want to define new machine types at all, those must die
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* in favor of using the device-tree
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* -- BenH.
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*/
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/* Platforms codes (to be obsoleted) */
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#define PLATFORM_PSERIES 0x0100
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#define PLATFORM_PSERIES_LPAR 0x0101
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#define PLATFORM_ISERIES_LPAR 0x0201
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#define PLATFORM_LPAR 0x0001
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#define PLATFORM_POWERMAC 0x0400
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#define PLATFORM_MAPLE 0x0500
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#define PLATFORM_PREP 0x0600
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#define PLATFORM_CHRP 0x0700
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#define PLATFORM_CELL 0x1000
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/* Compat platform codes for 32 bits */
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#define _MACH_prep PLATFORM_PREP
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#define _MACH_Pmac PLATFORM_POWERMAC
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#define _MACH_chrp PLATFORM_CHRP
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/* PREP sub-platform types see residual.h for these */
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#define _PREP_Motorola 0x01 /* motorola prep */
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#define _PREP_Firm 0x02 /* firmworks prep */
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#define _PREP_IBM 0x00 /* ibm prep */
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#define _PREP_Bull 0x03 /* bull prep */
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/* CHRP sub-platform types. These are arbitrary */
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#define _CHRP_Motorola 0x04 /* motorola chrp, the cobra */
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#define _CHRP_IBM 0x05 /* IBM chrp, the longtrail and longtrail 2 */
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#define _CHRP_Pegasos 0x06 /* Genesi/bplan's Pegasos and Pegasos2 */
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#define platform_is_pseries() (_machine == PLATFORM_PSERIES || \
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_machine == PLATFORM_PSERIES_LPAR)
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#define platform_is_lpar() (!!(_machine & PLATFORM_LPAR))
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#if defined(CONFIG_PPC_MULTIPLATFORM)
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extern int _machine;
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#ifdef CONFIG_PPC32
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/* what kind of prep workstation we are */
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extern int _prep_type;
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extern int _chrp_type;
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/*
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* This is used to identify the board type from a given PReP board
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* vendor. Board revision is also made available. This will be moved
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* elsewhere soon
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*/
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extern unsigned char ucSystemType;
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extern unsigned char ucBoardRev;
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extern unsigned char ucBoardRevMaj, ucBoardRevMin;
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#endif /* CONFIG_PPC32 */
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#elif defined(CONFIG_PPC_ISERIES)
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/*
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* iSeries is soon to become MULTIPLATFORM hopefully ...
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*/
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#define _machine PLATFORM_ISERIES_LPAR
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#else
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#define _machine 0
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#endif /* CONFIG_PPC_MULTIPLATFORM */
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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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/* Macros for adjusting thread priority (hardware multi-threading) */
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#define HMT_very_low() asm volatile("or 31,31,31 # very low priority")
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#define HMT_low() asm volatile("or 1,1,1 # low priority")
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#define HMT_medium_low() asm volatile("or 6,6,6 # medium low priority")
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#define HMT_medium() asm volatile("or 2,2,2 # medium priority")
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#define HMT_medium_high() asm volatile("or 5,5,5 # medium high priority")
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#define HMT_high() asm volatile("or 3,3,3 # high priority")
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#ifdef __KERNEL__
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extern int have_of;
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struct task_struct;
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void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp);
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void release_thread(struct task_struct *);
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/* Prepare to copy thread state - unlazy all lazy status */
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extern void prepare_to_copy(struct task_struct *tsk);
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/* Create a new kernel thread. */
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extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
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/* Lazy FPU handling on uni-processor */
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extern struct task_struct *last_task_used_math;
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extern struct task_struct *last_task_used_altivec;
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extern struct task_struct *last_task_used_spe;
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#ifdef CONFIG_PPC32
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#define TASK_SIZE (CONFIG_TASK_SIZE)
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/* This decides where the kernel will search for a free chunk of vm
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* space during mmap's.
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*/
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#define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3)
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#endif
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#ifdef CONFIG_PPC64
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/* 64-bit user address space is 44-bits (16TB user VM) */
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#define TASK_SIZE_USER64 (0x0000100000000000UL)
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/*
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* 32-bit user address space is 4GB - 1 page
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* (this 1 page is needed so referencing of 0xFFFFFFFF generates EFAULT
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*/
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#define TASK_SIZE_USER32 (0x0000000100000000UL - (1*PAGE_SIZE))
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#define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \
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TASK_SIZE_USER32 : TASK_SIZE_USER64)
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/* This decides where the kernel will search for a free chunk of vm
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* space during mmap's.
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*/
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#define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(TASK_SIZE_USER32 / 4))
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#define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(TASK_SIZE_USER64 / 4))
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#define TASK_UNMAPPED_BASE ((test_thread_flag(TIF_32BIT)) ? \
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TASK_UNMAPPED_BASE_USER32 : TASK_UNMAPPED_BASE_USER64 )
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#endif
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typedef struct {
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unsigned long seg;
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} mm_segment_t;
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struct thread_struct {
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unsigned long ksp; /* Kernel stack pointer */
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#ifdef CONFIG_PPC64
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unsigned long ksp_vsid;
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#endif
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struct pt_regs *regs; /* Pointer to saved register state */
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mm_segment_t fs; /* for get_fs() validation */
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#ifdef CONFIG_PPC32
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void *pgdir; /* root of page-table tree */
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signed long last_syscall;
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#endif
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#if defined(CONFIG_4xx) || defined (CONFIG_BOOKE)
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unsigned long dbcr0; /* debug control register values */
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unsigned long dbcr1;
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#endif
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double fpr[32]; /* Complete floating point set */
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struct { /* fpr ... fpscr must be contiguous */
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unsigned int pad;
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unsigned int val; /* Floating point status */
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} fpscr;
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int fpexc_mode; /* floating-point exception mode */
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#ifdef CONFIG_PPC64
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unsigned long start_tb; /* Start purr when proc switched in */
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unsigned long accum_tb; /* Total accumilated purr for process */
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#endif
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unsigned long vdso_base; /* base of the vDSO library */
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unsigned long dabr; /* Data address breakpoint register */
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#ifdef CONFIG_ALTIVEC
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/* Complete AltiVec register set */
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vector128 vr[32] __attribute((aligned(16)));
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/* AltiVec status */
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vector128 vscr __attribute((aligned(16)));
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unsigned long vrsave;
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int used_vr; /* set if process has used altivec */
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#endif /* CONFIG_ALTIVEC */
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#ifdef CONFIG_SPE
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unsigned long evr[32]; /* upper 32-bits of SPE regs */
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u64 acc; /* Accumulator */
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unsigned long spefscr; /* SPE & eFP status */
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int used_spe; /* set if process has used spe */
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#endif /* CONFIG_SPE */
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};
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#define ARCH_MIN_TASKALIGN 16
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#define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack)
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#ifdef CONFIG_PPC32
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#define INIT_THREAD { \
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.ksp = INIT_SP, \
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.fs = KERNEL_DS, \
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.pgdir = swapper_pg_dir, \
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.fpexc_mode = MSR_FE0 | MSR_FE1, \
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}
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#else
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#define INIT_THREAD { \
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.ksp = INIT_SP, \
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.regs = (struct pt_regs *)INIT_SP - 1, /* XXX bogus, I think */ \
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.fs = KERNEL_DS, \
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.fpr = {0}, \
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.fpscr = { .val = 0, }, \
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.fpexc_mode = MSR_FE0|MSR_FE1, \
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}
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#endif
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/*
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* Return saved PC of a blocked thread. For now, this is the "user" PC
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*/
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#define thread_saved_pc(tsk) \
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((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
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unsigned long get_wchan(struct task_struct *p);
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#define KSTK_EIP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
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#define KSTK_ESP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->gpr[1]: 0)
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/* Get/set floating-point exception mode */
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#define GET_FPEXC_CTL(tsk, adr) get_fpexc_mode((tsk), (adr))
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#define SET_FPEXC_CTL(tsk, val) set_fpexc_mode((tsk), (val))
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extern int get_fpexc_mode(struct task_struct *tsk, unsigned long adr);
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extern int set_fpexc_mode(struct task_struct *tsk, unsigned int val);
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static inline unsigned int __unpack_fe01(unsigned long msr_bits)
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{
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return ((msr_bits & MSR_FE0) >> 10) | ((msr_bits & MSR_FE1) >> 8);
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}
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static inline unsigned long __pack_fe01(unsigned int fpmode)
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{
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return ((fpmode << 10) & MSR_FE0) | ((fpmode << 8) & MSR_FE1);
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}
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#ifdef CONFIG_PPC64
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#define cpu_relax() do { HMT_low(); HMT_medium(); barrier(); } while (0)
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#else
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#define cpu_relax() barrier()
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#endif
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/*
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* Prefetch macros.
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*/
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#define ARCH_HAS_PREFETCH
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#define ARCH_HAS_PREFETCHW
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#define ARCH_HAS_SPINLOCK_PREFETCH
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static inline void prefetch(const void *x)
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{
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if (unlikely(!x))
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return;
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__asm__ __volatile__ ("dcbt 0,%0" : : "r" (x));
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}
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static inline void prefetchw(const void *x)
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{
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if (unlikely(!x))
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return;
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__asm__ __volatile__ ("dcbtst 0,%0" : : "r" (x));
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}
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#define spin_lock_prefetch(x) prefetchw(x)
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#ifdef CONFIG_PPC64
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#define HAVE_ARCH_PICK_MMAP_LAYOUT
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#endif
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#endif /* __KERNEL__ */
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_POWERPC_PROCESSOR_H */
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