minix/sys/arch/arm/include/locore.h

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/* cpu.h,v 1.45.4.7 2008/01/28 18:20:39 matt Exp */
/*
* Copyright (c) 1994-1996 Mark Brinicombe.
* Copyright (c) 1994 Brini.
* All rights reserved.
*
* This code is derived from software written for Brini by Mark Brinicombe
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Brini.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* RiscBSD kernel project
*
* cpu.h
*
* CPU specific symbols
*
* Created : 18/09/94
*
* Based on kate/katelib/arm6.h
*/
#ifndef _ARM_LOCORE_H_
#define _ARM_LOCORE_H_
#ifdef _KERNEL_OPT
#include "opt_cpuoptions.h"
#include "opt_cputypes.h"
#endif
#include <arm/cpuconf.h>
#include <arm/armreg.h>
#include <machine/frame.h>
#ifdef _LOCORE
#if defined(_ARM_ARCH_6)
#define IRQdisable cpsid i
#define IRQenable cpsie i
#elif defined(__PROG32)
#define IRQdisable \
stmfd sp!, {r0} ; \
mrs r0, cpsr ; \
orr r0, r0, #(I32_bit) ; \
msr cpsr_c, r0 ; \
ldmfd sp!, {r0}
#define IRQenable \
stmfd sp!, {r0} ; \
mrs r0, cpsr ; \
bic r0, r0, #(I32_bit) ; \
msr cpsr_c, r0 ; \
ldmfd sp!, {r0}
#else
/* Not yet used in 26-bit code */
#endif
#if defined (TPIDRPRW_IS_CURCPU)
#define GET_CURCPU(rX) mrc p15, 0, rX, c13, c0, 4
#define GET_CURLWP(rX) GET_CURCPU(rX); ldr rX, [rX, #CI_CURLWP]
#elif defined (TPIDRPRW_IS_CURLWP)
#define GET_CURLWP(rX) mrc p15, 0, rX, c13, c0, 4
#define GET_CURCPU(rX) GET_CURLWP(rX); ldr rX, [rX, #L_CPU]
#elif !defined(MULTIPROCESSOR)
#define GET_CURCPU(rX) ldr rX, =_C_LABEL(cpu_info_store)
#define GET_CURLWP(rX) GET_CURCPU(rX); ldr rX, [rX, #CI_CURLWP]
#endif
#define GET_CURPCB(rX) GET_CURLWP(rX); ldr rX, [rX, #L_PCB]
#else /* !_LOCORE */
#include <arm/cpufunc.h>
#ifdef __PROG32
#define IRQdisable __set_cpsr_c(I32_bit, I32_bit);
#define IRQenable __set_cpsr_c(I32_bit, 0);
#else
#define IRQdisable set_r15(R15_IRQ_DISABLE, R15_IRQ_DISABLE);
#define IRQenable set_r15(R15_IRQ_DISABLE, 0);
#endif
/*
* Validate a PC or PSR for a user process. Used by various system calls
* that take a context passed by the user and restore it.
*/
#ifdef __PROG32
#define VALID_R15_PSR(r15,psr) \
(((psr) & PSR_MODE) == PSR_USR32_MODE && \
((psr) & (I32_bit | F32_bit)) == 0)
#else
#define VALID_R15_PSR(r15,psr) \
(((r15) & R15_MODE) == R15_MODE_USR && \
((r15) & (R15_IRQ_DISABLE | R15_FIQ_DISABLE)) == 0)
#endif
/* The address of the vector page. */
extern vaddr_t vector_page;
#ifdef __PROG32
void arm32_vector_init(vaddr_t, int);
#define ARM_VEC_RESET (1 << 0)
#define ARM_VEC_UNDEFINED (1 << 1)
#define ARM_VEC_SWI (1 << 2)
#define ARM_VEC_PREFETCH_ABORT (1 << 3)
#define ARM_VEC_DATA_ABORT (1 << 4)
#define ARM_VEC_ADDRESS_EXCEPTION (1 << 5)
#define ARM_VEC_IRQ (1 << 6)
#define ARM_VEC_FIQ (1 << 7)
#define ARM_NVEC 8
#define ARM_VEC_ALL 0xffffffff
#endif /* __PROG32 */
#ifndef acorn26
/*
* cpu device glue (belongs in cpuvar.h)
*/
void cpu_attach(device_t, cpuid_t);
#endif
/* 1 == use cpu_sleep(), 0 == don't */
extern int cpu_do_powersave;
extern int cpu_fpu_present;
extern int cpu_hwdiv_present;
#if !defined(CPU_ARMV7)
#define CPU_IS_ARMV7_P() false
#elif defined(CPU_ARMV6) || defined(CPU_PRE_ARMV6)
extern bool cpu_armv7_p;
#define CPU_IS_ARMV7_P() (cpu_armv7_p)
#else
#define CPU_IS_ARMV7_P() true
#endif
/*
* Random cruft
*/
struct lwp;
/* locore.S */
void atomic_set_bit(u_int *, u_int);
void atomic_clear_bit(u_int *, u_int);
/* cpuswitch.S */
struct pcb;
void savectx(struct pcb *);
/* ast.c */
void userret(struct lwp *);
/* *_machdep.c */
void bootsync(void);
/* fault.c */
int badaddr_read(void *, size_t, void *);
/* syscall.c */
void swi_handler(trapframe_t *);
/* arm_machdep.c */
void ucas_ras_check(trapframe_t *);
/* vfp_init.c */
void vfp_attach(void);
void vfp_discardcontext(bool);
void vfp_savecontext(void);
void vfp_kernel_acquire(void);
void vfp_kernel_release(void);
bool vfp_used_p(void);
extern const pcu_ops_t arm_vfp_ops;
#endif /* !_LOCORE */
#endif /* !_ARM_LOCORE_H_ */