From 7908ba5b8139c73cc45bacb686199ca48c0d803c Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Thu, 18 Feb 1999 18:28:24 +0000 Subject: Part of the automake VI patch from Ralf Corsepius : > 4) rtems-rc-19990202-0.diff /reorg-score-cpu.sh > > reorg-score-cpu.sh reorganizes the cpu//* subdirectories in a > similar manner than previous reorg scripts did. rtems-rc-19990202-0.diff > contains the diffs after reorg-score-cpu.sh has been run on a > rtems-19981215 snapshot + my patches up to rtems-rc-19990131-2.diff. > > This patch is rather nasty and may break something. However, I've tested > it for about 10 different target/bsp pairs and believe to have shaken > out most bugs. I wonder about the following .h files that were not moved: a29k/asm.h a29k/cpu_asm.h i386/asm.h i960/asm.h m68k/asm.h m68k/m68302.h m68k/m68360.h m68k/qsm.h m68k/sim.h mips64orion/asm.h mips64orion/cpu_asm.h mips64orion/mips64orion.h no_cpu/asm.h no_cpu/cpu_asm.h powerpc/asm.h powerpc/mpc860.h sh/asm.h sparc/asm.h sparc/erc32.h --- c/src/exec/score/cpu/m68k/rtems/score/cpu.h | 647 ++++++++++++++++++++++++++++ 1 file changed, 647 insertions(+) create mode 100644 c/src/exec/score/cpu/m68k/rtems/score/cpu.h (limited to 'c/src/exec/score/cpu/m68k/rtems/score/cpu.h') diff --git a/c/src/exec/score/cpu/m68k/rtems/score/cpu.h b/c/src/exec/score/cpu/m68k/rtems/score/cpu.h new file mode 100644 index 0000000000..743677a944 --- /dev/null +++ b/c/src/exec/score/cpu/m68k/rtems/score/cpu.h @@ -0,0 +1,647 @@ +/* cpu.h + * + * This include file contains information pertaining to the Motorola + * m68xxx processor family. + * + * COPYRIGHT (c) 1989-1998. + * On-Line Applications Research Corporation (OAR). + * Copyright assigned to U.S. Government, 1994. + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.OARcorp.com/rtems/license.html. + * + * $Id$ + */ + +#ifndef __CPU_h +#define __CPU_h + +#ifdef __cplusplus +extern "C" { +#endif + +#include /* pick up machine definitions */ +#ifndef ASM +#include +#endif + +/* conditional compilation parameters */ + +#define CPU_INLINE_ENABLE_DISPATCH TRUE +#define CPU_UNROLL_ENQUEUE_PRIORITY FALSE + +/* + * Use the m68k's hardware interrupt stack support and have the + * interrupt manager allocate the memory for it. + */ + +#if ( M68K_HAS_SEPARATE_STACKS == 1) +#define CPU_HAS_SOFTWARE_INTERRUPT_STACK 0 +#define CPU_HAS_HARDWARE_INTERRUPT_STACK 1 +#else +#define CPU_HAS_SOFTWARE_INTERRUPT_STACK 1 +#define CPU_HAS_HARDWARE_INTERRUPT_STACK 0 +#endif +#define CPU_ALLOCATE_INTERRUPT_STACK 1 + +/* + * Does the RTEMS invoke the user's ISR with the vector number and + * a pointer to the saved interrupt frame (1) or just the vector + * number (0)? + */ + +#define CPU_ISR_PASSES_FRAME_POINTER 0 + +/* + * Some family members have no FP, some have an FPU such as the + * MC68881/MC68882 for the MC68020, others have it built in (MC68030, 040). + * + * NOTE: If on a CPU without hardware FP, then one can use software + * emulation. The gcc software FP emulation code has data which + * must be contexted switched on a per task basis. + */ + +#if ( M68K_HAS_FPU == 1 ) +#define CPU_HARDWARE_FP TRUE +#define CPU_SOFTWARE_FP FALSE +#else +#define CPU_HARDWARE_FP FALSE +#if defined(__GCC__) +#define CPU_SOFTWARE_FP TRUE +#else +#define CPU_SOFTWARE_FP FALSE +#endif +#endif + +/* + * All tasks are not by default floating point tasks on this CPU. + * The IDLE task does not have a floating point context on this CPU. + * It is safe to use the deferred floating point context switch + * algorithm on this CPU. + */ + +#define CPU_ALL_TASKS_ARE_FP FALSE +#define CPU_IDLE_TASK_IS_FP FALSE +#define CPU_USE_DEFERRED_FP_SWITCH TRUE + +#define CPU_PROVIDES_IDLE_THREAD_BODY FALSE +#define CPU_STACK_GROWS_UP FALSE +#define CPU_STRUCTURE_ALIGNMENT + +/* + * Define what is required to specify how the network to host conversion + * routines are handled. + */ + +#define CPU_CPU_HAS_OWN_HOST_TO_NETWORK_ROUTINES FALSE +#define CPU_BIG_ENDIAN TRUE +#define CPU_LITTLE_ENDIAN FALSE + +#ifndef ASM +/* structures */ + +/* + * Basic integer context for the m68k family. + */ + +typedef struct { + unsigned32 sr; /* (sr) status register */ + unsigned32 d2; /* (d2) data register 2 */ + unsigned32 d3; /* (d3) data register 3 */ + unsigned32 d4; /* (d4) data register 4 */ + unsigned32 d5; /* (d5) data register 5 */ + unsigned32 d6; /* (d6) data register 6 */ + unsigned32 d7; /* (d7) data register 7 */ + void *a2; /* (a2) address register 2 */ + void *a3; /* (a3) address register 3 */ + void *a4; /* (a4) address register 4 */ + void *a5; /* (a5) address register 5 */ + void *a6; /* (a6) address register 6 */ + void *a7_msp; /* (a7) master stack pointer */ +} Context_Control; + +/* + * Floating point context ares + */ + +#if (CPU_SOFTWARE_FP == TRUE) + +/* + * This is the same as gcc's view of the software FP condition code + * register _fpCCR. The implementation of the emulation code is + * in the gcc-VERSION/config/m68k directory. This structure is + * correct as of gcc 2.7.2.2. + */ + +typedef struct { + unsigned16 _exception_bits; + unsigned16 _trap_enable_bits; + unsigned16 _sticky_bits; + unsigned16 _rounding_mode; + unsigned16 _format; + unsigned16 _last_operation; + union { + float sf; + double df; + } _operand1; + union { + float sf; + double df; + } _operand2; +} Context_Control_fp; + +#else + +/* + * FP context save area for the M68881/M68882 numeric coprocessors. + */ + +typedef struct { + unsigned8 fp_save_area[332]; /* 216 bytes for FSAVE/FRESTORE */ + /* 96 bytes for FMOVEM FP0-7 */ + /* 12 bytes for FMOVEM CREGS */ + /* 4 bytes for non-null flag */ +} Context_Control_fp; +#endif + +/* + * The following structure defines the set of information saved + * on the current stack by RTEMS upon receipt of each interrupt. + */ + +typedef struct { + unsigned32 TBD; /* XXX Fix for this CPU */ +} CPU_Interrupt_frame; + +/* + * The following table contains the information required to configure + * the m68k specific parameters. + */ + +typedef struct { + void (*pretasking_hook)( void ); + void (*predriver_hook)( void ); + void (*postdriver_hook)( void ); + void (*idle_task)( void ); + boolean do_zero_of_workspace; + unsigned32 idle_task_stack_size; + unsigned32 interrupt_stack_size; + unsigned32 extra_mpci_receive_server_stack; + void * (*stack_allocate_hook)( unsigned32 ); + void (*stack_free_hook)( void* ); + /* end of fields required on all CPUs */ + + m68k_isr *interrupt_vector_table; +} rtems_cpu_table; + +/* variables */ + +SCORE_EXTERN void *_CPU_Interrupt_stack_low; +SCORE_EXTERN void *_CPU_Interrupt_stack_high; + +extern char _VBR[]; + +#if ( M68K_HAS_VBR == 0 ) + +/* + * Table of ISR handler entries that resides in RAM. The FORMAT/ID is + * pushed onto the stack. This is not is the same order as VBR processors. + * The ISR handler takes the format and uses it for dispatching the user + * handler. + * + * FIXME : should be moved to below CPU_INTERRUPT_NUMBER_OF_VECTORS + * + */ + +typedef struct { + unsigned16 move_a7; /* move #FORMAT_ID,%a7@- */ + unsigned16 format_id; + unsigned16 jmp; /* jmp _ISR_Handlers */ + unsigned32 isr_handler; +} _CPU_ISR_handler_entry; + +#define M68K_MOVE_A7 0x3F3C +#define M68K_JMP 0x4EF9 + + /* points to jsr-exception-table in targets wo/ VBR register */ +SCORE_EXTERN _CPU_ISR_handler_entry _CPU_ISR_jump_table[256]; + +#endif /* M68K_HAS_VBR */ +#endif /* ASM */ + +/* constants */ + +/* + * This defines the number of levels and the mask used to pick those + * bits out of a thread mode. + */ + +#define CPU_MODES_INTERRUPT_LEVEL 0x00000007 /* interrupt level in mode */ +#define CPU_MODES_INTERRUPT_MASK 0x00000007 /* interrupt level in mode */ + +/* + * context size area for floating point + */ + +#define CPU_CONTEXT_FP_SIZE sizeof( Context_Control_fp ) + +/* + * extra stack required by the MPCI receive server thread + */ + +#define CPU_MPCI_RECEIVE_SERVER_EXTRA_STACK 1024 + +/* + * m68k family supports 256 distinct vectors. + */ + +#define CPU_INTERRUPT_NUMBER_OF_VECTORS 256 +#define CPU_INTERRUPT_MAXIMUM_VECTOR_NUMBER (CPU_INTERRUPT_NUMBER_OF_VECTORS - 1) + +/* + * Minimum size of a thread's stack. + */ + +#define CPU_STACK_MINIMUM_SIZE 2048 + +/* + * m68k is pretty tolerant of alignment. Just put things on 4 byte boundaries. + */ + +#define CPU_ALIGNMENT 4 +#define CPU_HEAP_ALIGNMENT CPU_ALIGNMENT +#define CPU_PARTITION_ALIGNMENT CPU_ALIGNMENT + +/* + * On m68k thread stacks require no further alignment after allocation + * from the Workspace. + */ + +#define CPU_STACK_ALIGNMENT 0 + +#ifndef ASM + +/* macros */ + +/* + * ISR handler macros + * + * These macros perform the following functions: + * + disable all maskable CPU interrupts + * + restore previous interrupt level (enable) + * + temporarily restore interrupts (flash) + * + set a particular level + */ + +#define _CPU_ISR_Disable( _level ) \ + m68k_disable_interrupts( _level ) + +#define _CPU_ISR_Enable( _level ) \ + m68k_enable_interrupts( _level ) + +#define _CPU_ISR_Flash( _level ) \ + m68k_flash_interrupts( _level ) + +#define _CPU_ISR_Set_level( _newlevel ) \ + m68k_set_interrupt_level( _newlevel ) + +unsigned32 _CPU_ISR_Get_level( void ); + +/* end of ISR handler macros */ + +/* + * Context handler macros + * + * These macros perform the following functions: + * + initialize a context area + * + restart the current thread + * + calculate the initial pointer into a FP context area + * + initialize an FP context area + */ + +#define _CPU_Context_Initialize( _the_context, _stack_base, _size, \ + _isr, _entry_point, _is_fp ) \ + do { \ + unsigned32 _stack; \ + \ + (_the_context)->sr = 0x3000 | ((_isr) << 8); \ + _stack = (unsigned32)(_stack_base) + (_size) - 4; \ + (_the_context)->a7_msp = (void *)_stack; \ + *(void **)_stack = (void *)(_entry_point); \ + } while ( 0 ) + +#define _CPU_Context_Restart_self( _the_context ) \ + { asm volatile( "movew %0,%%sr ; " \ + "moval %1,%%a7 ; " \ + "rts" \ + : "=d" ((_the_context)->sr), "=d" ((_the_context)->a7_msp) \ + : "0" ((_the_context)->sr), "1" ((_the_context)->a7_msp) ); \ + } + +/* + * Floating Point Context Area Support routines + */ + +#if (CPU_SOFTWARE_FP == TRUE) + +/* + * This software FP implementation is only for GCC. + */ + +#define _CPU_Context_Fp_start( _base, _offset ) \ + ((void *) _Addresses_Add_offset( (_base), (_offset) ) ) + + +#define _CPU_Context_Initialize_fp( _fp_area ) \ + { \ + Context_Control_fp *_fp; \ + _fp = *(Context_Control_fp **)_fp_area; \ + _fp->_exception_bits = 0; \ + _fp->_trap_enable_bits = 0; \ + _fp->_sticky_bits = 0; \ + _fp->_rounding_mode = 0; /* ROUND_TO_NEAREST */ \ + _fp->_format = 0; /* NIL */ \ + _fp->_last_operation = 0; /* NOOP */ \ + _fp->_operand1.df = 0; \ + _fp->_operand2.df = 0; \ + } +#else +#define _CPU_Context_Fp_start( _base, _offset ) \ + ((void *) \ + _Addresses_Add_offset( \ + (_base), \ + (_offset) + CPU_CONTEXT_FP_SIZE - 4 \ + ) \ + ) + +#define _CPU_Context_Initialize_fp( _fp_area ) \ + { unsigned32 *_fp_context = (unsigned32 *)*(_fp_area); \ + \ + *(--(_fp_context)) = 0; \ + *(_fp_area) = (unsigned8 *)(_fp_context); \ + } +#endif + +/* end of Context handler macros */ + +/* + * Fatal Error manager macros + * + * These macros perform the following functions: + * + disable interrupts and halt the CPU + */ + +#if ( M68K_COLDFIRE_ARCH == 1 ) +#define _CPU_Fatal_halt( _error ) \ + { asm volatile( "move.w %%sr,%%d0\n\t" \ + "or.l %2,%%d0\n\t" \ + "move.w %%d0,%%sr\n\t" \ + "move.l %1,%%d0\n\t" \ + "move.l #0xDEADBEEF,%%d1\n\t" \ + "halt" \ + : "=g" (_error) \ + : "0" (_error), "d"(0x0700) \ + : "d0", "d1" ); \ + } +#else +#define _CPU_Fatal_halt( _error ) \ + { asm volatile( "movl %0,%%d0; " \ + "orw #0x0700,%%sr; " \ + "stop #0x2700" : "=d" ((_error)) : "0" ((_error)) ); \ + } +#endif + +/* end of Fatal Error manager macros */ + +/* + * Bitfield handler macros + * + * These macros perform the following functions: + * + scan for the highest numbered (MSB) set in a 16 bit bitfield + * + * NOTE: + * + * It appears that on the M68020 bitfield are always 32 bits wide + * when in a register. This code forces the bitfield to be in + * memory (it really always is anyway). This allows us to + * have a real 16 bit wide bitfield which operates "correctly." + */ + +#define CPU_USE_GENERIC_BITFIELD_CODE FALSE +#define CPU_USE_GENERIC_BITFIELD_DATA FALSE + +#if ( M68K_HAS_BFFFO == 1 ) + +#define _CPU_Bitfield_Find_first_bit( _value, _output ) \ + asm volatile( "bfffo (%1),#0,#16,%0" : "=d" (_output) : "a" (&_value)); +#else + +/* duplicates BFFFO results for 16 bits (i.e., 15-(_priority) in + _CPU_Priority_bits_index is not needed), handles the 0 case, and + does not molest _value -- jsg */ +#if ( M68K_COLDFIRE_ARCH == 1 ) +#define _CPU_Bitfield_Find_first_bit( _value, _output ) \ + { \ + extern const unsigned char __BFFFOtable[256]; \ + register int dumby; \ + \ + asm volatile ( \ + " clr.l %1\n" \ + " move.w %2,%1\n" \ + " lsr.l #8,%1\n" \ + " beq.s 1f\n" \ + " move.b (%3,%1),%0\n" \ + " bra.s 0f\n" \ + "1: move.w %2,%1\n" \ + " move.b (%3,%1),%0\n" \ + " addq.l #8,%0\n" \ + "0: and.l #0xff,%0\n" \ + : "=&d" ((_output)), "=&d" ((dumby)) \ + : "d" ((_value)), "ao" ((__BFFFOtable)) \ + : "cc" ) ; \ + } +#elif ( M68K_HAS_EXTB_L == 1 ) +#define _CPU_Bitfield_Find_first_bit( _value, _output ) \ + { \ + extern const unsigned char __BFFFOtable[256]; \ + register int dumby; \ + \ + asm volatile ( " move.w %2,%1\n" \ + " lsr.w #8,%1\n" \ + " beq.s 1f\n" \ + " move.b (%3,%1.w),%0\n" \ + " extb.l %0\n" \ + " bra.s 0f\n" \ + "1: moveq.l #8,%0\n" \ + " add.b (%3,%2.w),%0\n" \ + "0:\n" \ + : "=&d" ((_output)), "=&d" ((dumby)) \ + : "d" ((_value)), "ao" ((__BFFFOtable)) \ + : "cc" ) ; \ + } +#else +#define _CPU_Bitfield_Find_first_bit( _value, _output ) \ + { \ + extern const unsigned char __BFFFOtable[256]; \ + register int dumby; \ + \ + asm volatile ( " move.w %2,%1\n" \ + " lsr.w #8,%1\n" \ + " beq.s 1f\n" \ + " move.b (%3,%1.w),%0\n" \ + " and.l #0x000000ff,%0\n"\ + " bra.s 0f\n" \ + "1: moveq.l #8,%0\n" \ + " add.b (%3,%2.w),%0\n" \ + "0:\n" \ + : "=&d" ((_output)), "=&d" ((dumby)) \ + : "d" ((_value)), "ao" ((__BFFFOtable)) \ + : "cc" ) ; \ + } +#endif + +#endif + +/* end of Bitfield handler macros */ + +/* + * Priority handler macros + * + * These macros perform the following functions: + * + return a mask with the bit for this major/minor portion of + * of thread priority set. + * + translate the bit number returned by "Bitfield_find_first_bit" + * into an index into the thread ready chain bit maps + */ + +#define _CPU_Priority_Mask( _bit_number ) \ + ( 0x8000 >> (_bit_number) ) + +#define _CPU_Priority_bits_index( _priority ) \ + (_priority) + +/* end of Priority handler macros */ + +/* functions */ + +/* + * _CPU_Initialize + * + * This routine performs CPU dependent initialization. + */ + +void _CPU_Initialize( + rtems_cpu_table *cpu_table, + void (*thread_dispatch) +); + +/* + * _CPU_ISR_install_raw_handler + * + * This routine installs a "raw" interrupt handler directly into the + * processor's vector table. + */ + +void _CPU_ISR_install_raw_handler( + unsigned32 vector, + proc_ptr new_handler, + proc_ptr *old_handler +); + +/* + * _CPU_ISR_install_vector + * + * This routine installs an interrupt vector. + */ + +void _CPU_ISR_install_vector( + unsigned32 vector, + proc_ptr new_handler, + proc_ptr *old_handler +); + +/* + * _CPU_Install_interrupt_stack + * + * This routine installs the hardware interrupt stack pointer. + */ + +void _CPU_Install_interrupt_stack( void ); + +/* + * _CPU_Context_switch + * + * This routine switches from the run context to the heir context. + */ + +void _CPU_Context_switch( + Context_Control *run, + Context_Control *heir +); + +/* + * _CPU_Context_save_fp + * + * This routine saves the floating point context passed to it. + */ + +void _CPU_Context_save_fp( + void **fp_context_ptr +); + +/* + * _CPU_Context_restore_fp + * + * This routine restores the floating point context passed to it. + */ + +void _CPU_Context_restore_fp( + void **fp_context_ptr +); + +#if (M68K_HAS_FPSP_PACKAGE == 1) +/* + * Hooks for the Floating Point Support Package (FPSP) provided by Motorola + * + * NOTES: + * + * Motorola 68k family CPU's before the 68040 used a coprocessor + * (68881 or 68882) to handle floating point. The 68040 has internal + * floating point support -- but *not* the complete support provided by + * the 68881 or 68882. The leftover functions are taken care of by the + * M68040 Floating Point Support Package. Quoting from the MC68040 + * Microprocessors User's Manual, Section 9, Floating-Point Unit (MC68040): + * + * "When used with the M68040FPSP, the MC68040 FPU is fully + * compliant with IEEE floating-point standards." + * + * M68KFPSPInstallExceptionHandlers is in libcpu/m68k/MODEL/fpsp and + * is invoked early in the application code to insure that proper FP + * behavior is installed. This is not left to the BSP to call, since + * this would force all applications using that BSP to use FPSP which + * is not necessarily desirable. + * + * There is a similar package for the 68060 but RTEMS does not yet + * support the 68060. + */ + +void M68KFPSPInstallExceptionHandlers (void); + +SCORE_EXTERN int (*_FPSP_install_raw_handler)( + unsigned32 vector, + proc_ptr new_handler, + proc_ptr *old_handler +); + +#endif + + +#endif + +#ifdef __cplusplus +} +#endif + +#endif +/* end of include file */ -- cgit v1.2.3