diff options
Diffstat (limited to 'c/src/librdbg/src/powerpc/rdbg_cpu_asm.S')
| -rw-r--r-- | c/src/librdbg/src/powerpc/rdbg_cpu_asm.S | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/c/src/librdbg/src/powerpc/rdbg_cpu_asm.S b/c/src/librdbg/src/powerpc/rdbg_cpu_asm.S new file mode 100644 index 0000000000..ef1a43385d --- /dev/null +++ b/c/src/librdbg/src/powerpc/rdbg_cpu_asm.S @@ -0,0 +1,82 @@ +/* cpu_asm.s + * + * This file contains all assembly code for the Intel i386 implementation + * of RDBG. + * + * $Id$ + * + */ + +#include <libcpu/cpu.h> +#include <libcpu/io.h> +#include <rtems/score/targopts.h> +#include <asm.h> + + BEGIN_CODE + +/* + * void copyback_data_cache_and_invalidate_instr_cache(addr, size) + * + * This routine performs a copy of the data cache + * and invalidate the instruction cache + */ + + .p2align 5 + PUBLIC_VAR (copyback_data_cache_and_invalidate_instr_cache) + +SYM (copyback_data_cache_and_invalidate_instr_cache): + /* r3 address to handle, r4 length in bytes */ + addi r6, r0, PPC_CACHE_ALIGNMENT + /* r5 = last address to handle */ + add r5,r3,r4 + /* r3 = cache_align(r3, PPC_CACHE_ALIGNMENT) + subi r0,r6,1 + andc r3,r3,r0 + /* R4 = R3 = copy of first address */ + mr r4,r3 + /* + * Copyback data cache + */ +1: cmplw r4,r5 /* r4 >= r5 then done */ + dcbst 0,r4 /* flush (data cache bloc store) */ + add r4,r4,r6 /* r4 = next cache line addr */ + blt 1b /* end r4 >= r5 then done */ + sync /* Wait for all dcbst to complete on bus */ + /* + * invalidate instruction cache + */ + /* R4 = fisrt address */ + mr r4,r3 +2: cmplw r4,r5 /* r4 >= r5 then done */ + icbi 0,r4 /* invalidate (instruction cache bloc invalidate) */ + add r4,r4,r6 /* r4 = next cache line addr */ + blt 2b /* end r4 >= r5 then done */ + sync /* Wait for all icbi to complete on bus */ + isync + blr + + +/* + * void enterRdbg(void) + * + * This function perform a call to the exception SYSTEM call + * It is used : + * 1 - in the user code, to simulate a Breakpoint. + * (with justSaveContext = 0) + * 2 - in the RDBG code, to push a ctx in the list. + * (with justSaveContext = 1) + * + * In most of case, it will be use as described in 1. + * The 2nd possibility will be used by RDBG to obtain + * its own ctx + */ + + PUBLIC_VAR (enterRdbg) + +SYM (enterRdbg): + sc + blr + +END_CODE + +END |