diff options
Diffstat (limited to 'cpukit/score/cpu/m68k/cpu.c')
| -rw-r--r-- | cpukit/score/cpu/m68k/cpu.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/cpukit/score/cpu/m68k/cpu.c b/cpukit/score/cpu/m68k/cpu.c index ad46c10e78..c50a63fda1 100644 --- a/cpukit/score/cpu/m68k/cpu.c +++ b/cpukit/score/cpu/m68k/cpu.c @@ -21,6 +21,39 @@ #include <rtems/score/percpu.h> #include <rtems/score/tls.h> +#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. + */ + +typedef struct { + uint16_t move_a7; /* move #FORMAT_ID,%a7@- */ + uint16_t format_id; + uint16_t jmp; /* jmp _ISR_Handlers */ + uint32_t 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 */ +static _CPU_ISR_handler_entry +_CPU_ISR_jump_table[ CPU_INTERRUPT_NUMBER_OF_VECTORS ]; + +#endif /* M68K_HAS_VBR */ + +#if (M68K_HAS_FPSP_PACKAGE == 1) +int (*_FPSP_install_raw_handler)( + uint32_t vector, + proc_ptr new_handler, + proc_ptr *old_handler +); +#endif + #if defined( __mcoldfire__ ) && ( M68K_HAS_FPU == 1 ) uint32_t _CPU_cacr_shadow; #endif |