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Diffstat (limited to 'include/asm-frv/registers.h')
| -rw-r--r-- | include/asm-frv/registers.h | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/include/asm-frv/registers.h b/include/asm-frv/registers.h new file mode 100644 index 0000000..fccfd95 --- /dev/null +++ b/include/asm-frv/registers.h @@ -0,0 +1,255 @@ +/* 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 */ |
