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/* registers.h: register frame declarations
*
* Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program 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.
*/
/*
* notes:
*
* (1) that the members of all these structures are carefully aligned to permit
* usage of STD/STDF instructions
*
* (2) if you change these structures, you must change the code in
* arch/frvnommu/kernel/{break.S,entry.S,switch_to.S,gdb-stub.c}
*
*
* the kernel stack space block looks like this:
*
* +0x2000 +----------------------
* | union {
* | struct user_context
* | struct pt_regs [user exception]
* | }
* +---------------------- <-- __kernel_frame0_ptr (maybe GR28)
* |
* | kernel stack
* |
* |......................
* | struct pt_regs [kernel exception]
* |...................... <-- __kernel_frame0_ptr (maybe GR28)
* |
* | kernel stack
* |
* |...................... <-- stack pointer (GR1)
* |
* | unused stack space
* |
* +----------------------
* | struct thread_info
* +0x0000 +---------------------- <-- __current_thread_info (GR15);
*
* note that GR28 points to the current exception frame
*/
#ifndef _ASM_REGISTERS_H
#define _ASM_REGISTERS_H
#ifndef __ASSEMBLY__
#define __OFFSET(X) (X)
#define __OFFSETC(X,N) xxxxxxxxxxxxxxxxxxxxxxxx
#else
#define __OFFSET(X) ((X)*4)
#define __OFFSETC(X,N) ((X)*4+(N))
#endif
/*****************************************************************************/
/*
* Exception/Interrupt frame
* - held on kernel stack
* - 8-byte aligned on stack (old SP is saved in frame)
* - GR0 is fixed 0, so we don't save it
*/
#ifndef __ASSEMBLY__
struct pt_regs {
unsigned long psr; /* Processor Status Register */
unsigned long isr; /* Integer Status Register */
unsigned long ccr; /* Condition Code Register */
unsigned long cccr; /* Condition Code for Conditional Insns Register */
unsigned long lr; /* Link Register */
unsigned long lcr; /* Loop Count Register */
unsigned long pc; /* Program Counter Register */
unsigned long __status; /* exception status */
unsigned long syscallno; /* syscall number or -1 */
unsigned long orig_gr8; /* original syscall arg #1 */
unsigned long gner0;
unsigned long gner1;
unsigned long long iacc0;
unsigned long tbr; /* GR0 is fixed zero, so we use this for TBR */
unsigned long sp; /* GR1: USP/KSP */
unsigned long fp; /* GR2: FP */
unsigned long gr3;
unsigned long gr4;
unsigned long gr5;
unsigned long gr6;
unsigned long gr7; /* syscall number */
unsigned long gr8; /* 1st syscall param; syscall return */
unsigned long gr9; /* 2nd syscall param */
unsigned long gr10; /* 3rd syscall param */
unsigned long gr11; /* 4th syscall param */
unsigned long gr12; /* 5th syscall param */
unsigned long gr13; /* 6th syscall param */
unsigned long gr14;
unsigned long gr15;
unsigned long gr16; /* GP pointer */
unsigned long gr17; /* small data */
unsigned long gr18; /* PIC/PID */
unsigned long gr19;
unsigned long gr20;
unsigned long gr21;
unsigned long gr22;
unsigned long gr23;
unsigned long gr24;
unsigned long gr25;
unsigned long gr26;
unsigned long gr27;
struct pt_regs *next_frame; /* GR28 - next exception frame */
unsigned long gr29; /* GR29 - OS reserved */
unsigned long gr30; /* GR30 - OS reserved */
unsigned long gr31; /* GR31 - OS reserved */
} __attribute__((aligned(8)));
#endif
#define REG_PSR __OFFSET( 0) /* Processor Status Register */
#define REG_ISR __OFFSET( 1) /* Integer Status Register */
#define REG_CCR __OFFSET( 2) /* Condition Code Register */
#define REG_CCCR __OFFSET( 3) /* Condition Code for Conditional Insns Register */
#define REG_LR __OFFSET( 4) /* Link Register */
#define REG_LCR __OFFSET( 5) /* Loop Count Register */
#define REG_PC __OFFSET( 6) /* Program Counter */
#define REG__STATUS __OFFSET( 7) /* exception status */
#define REG__STATUS_STEP 0x00000001 /* - reenable single stepping on return */
#define REG__STATUS_STEPPED 0x00000002 /* - single step caused exception */
#define REG__STATUS_BROKE 0x00000004 /* - BREAK insn caused exception */
#define REG__STATUS_SYSC_ENTRY 0x40000000 /* - T on syscall entry (ptrace.c only) */
#define REG__STATUS_SYSC_EXIT 0x80000000 /* - T on syscall exit (ptrace.c only) */
#define REG_SYSCALLNO __OFFSET( 8) /* syscall number or -1 */
#define REG_ORIG_GR8 __OFFSET( 9) /* saved GR8 for signal handling */
#define REG_GNER0 __OFFSET(10)
#define REG_GNER1 __OFFSET(11)
#define REG_IACC0 __OFFSET(12)
#define REG_TBR __OFFSET(14) /* Trap Vector Register */
#define REG_GR(R) __OFFSET((14+(R)))
#define REG__END REG_GR(32)
#define REG_SP REG_GR(1)
#define REG_FP REG_GR(2)
#define REG_PREV_FRAME REG_GR(28) /* previous exception frame pointer (old gr28 value) */
#define REG_CURR_TASK REG_GR(29) /* current task */
/*****************************************************************************/
/*
* extension tacked in front of the exception frame in debug mode
*/
#ifndef __ASSEMBLY__
struct pt_debug_regs
{
unsigned long bpsr;
unsigned long dcr;
unsigned long brr;
unsigned long nmar;
struct pt_regs normal_regs;
} __attribute__((aligned(8)));
#endif
#define REG_NMAR __OFFSET(-1)
#define REG_BRR __OFFSET(-2)
#define REG_DCR __OFFSET(-3)
#define REG_BPSR __OFFSET(-4)
#define REG__DEBUG_XTRA __OFFSET(4)
/*****************************************************************************/
/*
* userspace registers
*/
#ifndef __ASSEMBLY__
struct user_int_regs
{
/* integer registers
* - up to gr[31] mirror pt_regs
* - total size must be multiple of 8 bytes
*/
unsigned long psr; /* Processor Status Register */
unsigned long isr; /* Integer Status Register */
unsigned long ccr; /* Condition Code Register */
unsigned long cccr; /* Condition Code for Conditional Insns Register */
unsigned long lr; /* Link Register */
unsigned long lcr; /* Loop Count Register */
unsigned long pc; /* Program Counter Register */
unsigned long __status; /* exception status */
unsigned long syscallno; /* syscall number or -1 */
unsigned long orig_gr8; /* original syscall arg #1 */
unsigned long gner[2];
unsigned long long iacc[1];
union {
unsigned long tbr;
unsigned long gr[64];
};
};
struct user_fpmedia_regs
{
/* FP/Media registers */
unsigned long fr[64];
unsigned long fner[2];
unsigned long msr[2];
unsigned long acc[8];
unsigned char accg[8];
unsigned long fsr[1];
};
struct user_context
{
struct user_int_regs i;
struct user_fpmedia_regs f;
/* we provide a context extension so that we can save the regs for CPUs that
* implement many more of Fujitsu's lavish register spec
*/
void *extension;
} __attribute__((aligned(8)));
#endif
#define NR_USER_INT_REGS (14 + 64)
#define NR_USER_FPMEDIA_REGS (64 + 2 + 2 + 8 + 8/4 + 1)
#define NR_USER_CONTEXT (NR_USER_INT_REGS + NR_USER_FPMEDIA_REGS + 1)
#define USER_CONTEXT_SIZE (((NR_USER_CONTEXT + 1) & ~1) * 4)
#define __THREAD_FRAME __OFFSET(0)
#define __THREAD_CURR __OFFSET(1)
#define __THREAD_SP __OFFSET(2)
#define __THREAD_FP __OFFSET(3)
#define __THREAD_LR __OFFSET(4)
#define __THREAD_PC __OFFSET(5)
#define __THREAD_GR(R) __OFFSET(6 + (R) - 16)
#define __THREAD_FRAME0 __OFFSET(19)
#define __THREAD_USER __OFFSET(19)
#define __USER_INT __OFFSET(0)
#define __INT_GR(R) __OFFSET(14 + (R))
#define __USER_FPMEDIA __OFFSET(NR_USER_INT_REGS)
#define __FPMEDIA_FR(R) __OFFSET(NR_USER_INT_REGS + (R))
#define __FPMEDIA_FNER(R) __OFFSET(NR_USER_INT_REGS + 64 + (R))
#define __FPMEDIA_MSR(R) __OFFSET(NR_USER_INT_REGS + 66 + (R))
#define __FPMEDIA_ACC(R) __OFFSET(NR_USER_INT_REGS + 68 + (R))
#define __FPMEDIA_ACCG(R) __OFFSETC(NR_USER_INT_REGS + 76, (R))
#define __FPMEDIA_FSR(R) __OFFSET(NR_USER_INT_REGS + 78 + (R))
#endif /* _ASM_REGISTERS_H */
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