| /* |
| * U-boot - architecture specific kgdb code |
| * |
| * Copyright 2009 Analog Devices Inc. |
| * |
| * Licensed under the GPL-2 or later. |
| */ |
| |
| #include <common.h> |
| #include <command.h> |
| |
| #include <kgdb.h> |
| #include <asm/processor.h> |
| #include <asm/mach-common/bits/core.h> |
| #include "kgdb.h" |
| #include <asm/deferred.h> |
| #include <asm/traps.h> |
| #include <asm/signal.h> |
| |
| void kgdb_enter(struct pt_regs *regs, kgdb_data *kdp) |
| { |
| /* disable interrupts */ |
| disable_interrupts(); |
| |
| /* reply to host that an exception has occurred */ |
| kdp->sigval = kgdb_trap(regs); |
| |
| /* send the PC and the Stack Pointer */ |
| kdp->nregs = 2; |
| kdp->regs[0].num = BFIN_PC; |
| kdp->regs[0].val = regs->pc; |
| |
| kdp->regs[1].num = BFIN_SP; |
| kdp->regs[1].val = (unsigned long)regs; |
| |
| } |
| |
| void kgdb_exit(struct pt_regs *regs, kgdb_data *kdp) |
| { |
| if (kdp->extype & KGDBEXIT_WITHADDR) |
| printf("KGDBEXIT_WITHADDR\n"); |
| |
| switch (kdp->extype & KGDBEXIT_TYPEMASK) { |
| case KGDBEXIT_KILL: |
| printf("KGDBEXIT_KILL:\n"); |
| break; |
| case KGDBEXIT_CONTINUE: |
| /* Make sure the supervisor single step bit is clear */ |
| regs->syscfg &= ~1; |
| break; |
| case KGDBEXIT_SINGLE: |
| /* set the supervisor single step bit */ |
| regs->syscfg |= 1; |
| break; |
| default: |
| printf("KGDBEXIT : %d\n", kdp->extype); |
| } |
| |
| /* enable interrupts */ |
| enable_interrupts(); |
| } |
| |
| int kgdb_trap(struct pt_regs *regs) |
| { |
| /* ipend doesn't get filled in properly */ |
| switch (regs->seqstat & EXCAUSE) { |
| case VEC_EXCPT01: |
| return SIGTRAP; |
| case VEC_EXCPT03: |
| return SIGSEGV; |
| case VEC_EXCPT02: |
| return SIGTRAP; |
| case VEC_EXCPT04 ... VEC_EXCPT15: |
| return SIGILL; |
| case VEC_STEP: |
| return SIGTRAP; |
| case VEC_OVFLOW: |
| return SIGTRAP; |
| case VEC_UNDEF_I: |
| return SIGILL; |
| case VEC_ILGAL_I: |
| return SIGILL; |
| case VEC_CPLB_VL: |
| return SIGSEGV; |
| case VEC_MISALI_D: |
| return SIGBUS; |
| case VEC_UNCOV: |
| return SIGILL; |
| case VEC_CPLB_MHIT: |
| return SIGSEGV; |
| case VEC_MISALI_I: |
| return SIGBUS; |
| case VEC_CPLB_I_VL: |
| return SIGBUS; |
| case VEC_CPLB_I_MHIT: |
| return SIGSEGV; |
| default: |
| return SIGBUS; |
| } |
| } |
| |
| /* |
| * getregs - gets the pt_regs, and gives them to kgdb's buffer |
| */ |
| int kgdb_getregs(struct pt_regs *regs, char *buf, int max) |
| { |
| unsigned long *gdb_regs = (unsigned long *)buf; |
| |
| if (max < NUMREGBYTES) |
| kgdb_error(KGDBERR_NOSPACE); |
| |
| if ((unsigned long)gdb_regs & 3) |
| kgdb_error(KGDBERR_ALIGNFAULT); |
| |
| gdb_regs[BFIN_R0] = regs->r0; |
| gdb_regs[BFIN_R1] = regs->r1; |
| gdb_regs[BFIN_R2] = regs->r2; |
| gdb_regs[BFIN_R3] = regs->r3; |
| gdb_regs[BFIN_R4] = regs->r4; |
| gdb_regs[BFIN_R5] = regs->r5; |
| gdb_regs[BFIN_R6] = regs->r6; |
| gdb_regs[BFIN_R7] = regs->r7; |
| gdb_regs[BFIN_P0] = regs->p0; |
| gdb_regs[BFIN_P1] = regs->p1; |
| gdb_regs[BFIN_P2] = regs->p2; |
| gdb_regs[BFIN_P3] = regs->p3; |
| gdb_regs[BFIN_P4] = regs->p4; |
| gdb_regs[BFIN_P5] = regs->p5; |
| gdb_regs[BFIN_SP] = (unsigned long)regs; |
| gdb_regs[BFIN_FP] = regs->fp; |
| gdb_regs[BFIN_I0] = regs->i0; |
| gdb_regs[BFIN_I1] = regs->i1; |
| gdb_regs[BFIN_I2] = regs->i2; |
| gdb_regs[BFIN_I3] = regs->i3; |
| gdb_regs[BFIN_M0] = regs->m0; |
| gdb_regs[BFIN_M1] = regs->m1; |
| gdb_regs[BFIN_M2] = regs->m2; |
| gdb_regs[BFIN_M3] = regs->m3; |
| gdb_regs[BFIN_B0] = regs->b0; |
| gdb_regs[BFIN_B1] = regs->b1; |
| gdb_regs[BFIN_B2] = regs->b2; |
| gdb_regs[BFIN_B3] = regs->b3; |
| gdb_regs[BFIN_L0] = regs->l0; |
| gdb_regs[BFIN_L1] = regs->l1; |
| gdb_regs[BFIN_L2] = regs->l2; |
| gdb_regs[BFIN_L3] = regs->l3; |
| gdb_regs[BFIN_A0_DOT_X] = regs->a0x; |
| gdb_regs[BFIN_A0_DOT_W] = regs->a0w; |
| gdb_regs[BFIN_A1_DOT_X] = regs->a1x; |
| gdb_regs[BFIN_A1_DOT_W] = regs->a1w; |
| gdb_regs[BFIN_ASTAT] = regs->astat; |
| gdb_regs[BFIN_RETS] = regs->rets; |
| gdb_regs[BFIN_LC0] = regs->lc0; |
| gdb_regs[BFIN_LT0] = regs->lt0; |
| gdb_regs[BFIN_LB0] = regs->lb0; |
| gdb_regs[BFIN_LC1] = regs->lc1; |
| gdb_regs[BFIN_LT1] = regs->lt1; |
| gdb_regs[BFIN_LB1] = regs->lb1; |
| gdb_regs[BFIN_CYCLES] = 0; |
| gdb_regs[BFIN_CYCLES2] = 0; |
| gdb_regs[BFIN_USP] = regs->usp; |
| gdb_regs[BFIN_SEQSTAT] = regs->seqstat; |
| gdb_regs[BFIN_SYSCFG] = regs->syscfg; |
| gdb_regs[BFIN_RETI] = regs->pc; |
| gdb_regs[BFIN_RETX] = regs->retx; |
| gdb_regs[BFIN_RETN] = regs->retn; |
| gdb_regs[BFIN_RETE] = regs->rete; |
| gdb_regs[BFIN_PC] = regs->pc; |
| gdb_regs[BFIN_CC] = 0; |
| gdb_regs[BFIN_EXTRA1] = 0; |
| gdb_regs[BFIN_EXTRA2] = 0; |
| gdb_regs[BFIN_EXTRA3] = 0; |
| gdb_regs[BFIN_IPEND] = regs->ipend; |
| |
| return NUMREGBYTES; |
| } |
| |
| /* |
| * putreg - put kgdb's reg (regno) into the pt_regs |
| */ |
| void kgdb_putreg(struct pt_regs *regs, int regno, char *buf, int length) |
| { |
| unsigned long *ptr = (unsigned long *)buf; |
| |
| if (regno < 0 || regno > BFIN_NUM_REGS) |
| kgdb_error(KGDBERR_BADPARAMS); |
| |
| if (length < 4) |
| kgdb_error(KGDBERR_NOSPACE); |
| |
| if ((unsigned long)ptr & 3) |
| kgdb_error(KGDBERR_ALIGNFAULT); |
| |
| switch (regno) { |
| case BFIN_R0: |
| regs->r0 = *ptr; |
| break; |
| case BFIN_R1: |
| regs->r1 = *ptr; |
| break; |
| case BFIN_R2: |
| regs->r2 = *ptr; |
| break; |
| case BFIN_R3: |
| regs->r3 = *ptr; |
| break; |
| case BFIN_R4: |
| regs->r4 = *ptr; |
| break; |
| case BFIN_R5: |
| regs->r5 = *ptr; |
| break; |
| case BFIN_R6: |
| regs->r6 = *ptr; |
| break; |
| case BFIN_R7: |
| regs->r7 = *ptr; |
| break; |
| case BFIN_P0: |
| regs->p0 = *ptr; |
| break; |
| case BFIN_P1: |
| regs->p1 = *ptr; |
| break; |
| case BFIN_P2: |
| regs->p2 = *ptr; |
| break; |
| case BFIN_P3: |
| regs->p3 = *ptr; |
| break; |
| case BFIN_P4: |
| regs->p4 = *ptr; |
| break; |
| case BFIN_P5: |
| regs->p5 = *ptr; |
| break; |
| case BFIN_SP: |
| regs->reserved = *ptr; |
| break; |
| case BFIN_FP: |
| regs->fp = *ptr; |
| break; |
| case BFIN_I0: |
| regs->i0 = *ptr; |
| break; |
| case BFIN_I1: |
| regs->i1 = *ptr; |
| break; |
| case BFIN_I2: |
| regs->i2 = *ptr; |
| break; |
| case BFIN_I3: |
| regs->i3 = *ptr; |
| break; |
| case BFIN_M0: |
| regs->m0 = *ptr; |
| break; |
| case BFIN_M1: |
| regs->m1 = *ptr; |
| break; |
| case BFIN_M2: |
| regs->m2 = *ptr; |
| break; |
| case BFIN_M3: |
| regs->m3 = *ptr; |
| break; |
| case BFIN_B0: |
| regs->b0 = *ptr; |
| break; |
| case BFIN_B1: |
| regs->b1 = *ptr; |
| break; |
| case BFIN_B2: |
| regs->b2 = *ptr; |
| break; |
| case BFIN_B3: |
| regs->b3 = *ptr; |
| break; |
| case BFIN_L0: |
| regs->l0 = *ptr; |
| break; |
| case BFIN_L1: |
| regs->l1 = *ptr; |
| break; |
| case BFIN_L2: |
| regs->l2 = *ptr; |
| break; |
| case BFIN_L3: |
| regs->l3 = *ptr; |
| break; |
| case BFIN_A0_DOT_X: |
| regs->a0x = *ptr; |
| break; |
| case BFIN_A0_DOT_W: |
| regs->a0w = *ptr; |
| break; |
| case BFIN_A1_DOT_X: |
| regs->a1x = *ptr; |
| break; |
| case BFIN_A1_DOT_W: |
| regs->a1w = *ptr; |
| break; |
| case BFIN_ASTAT: |
| regs->astat = *ptr; |
| break; |
| case BFIN_RETS: |
| regs->rets = *ptr; |
| break; |
| case BFIN_LC0: |
| regs->lc0 = *ptr; |
| break; |
| case BFIN_LT0: |
| regs->lt0 = *ptr; |
| break; |
| case BFIN_LB0: |
| regs->lb0 = *ptr; |
| break; |
| case BFIN_LC1: |
| regs->lc1 = *ptr; |
| break; |
| case BFIN_LT1: |
| regs->lt1 = *ptr; |
| break; |
| case BFIN_LB1: |
| regs->lb1 = *ptr; |
| break; |
| /* |
| BFIN_CYCLES, |
| BFIN_CYCLES2, |
| BFIN_USP, |
| BFIN_SEQSTAT, |
| BFIN_SYSCFG, |
| */ |
| case BFIN_RETX: |
| regs->retx = *ptr; |
| break; |
| case BFIN_RETN: |
| regs->retn = *ptr; |
| break; |
| case BFIN_RETE: |
| regs->rete = *ptr; |
| break; |
| case BFIN_PC: |
| regs->pc = *ptr; |
| break; |
| |
| default: |
| kgdb_error(KGDBERR_BADPARAMS); |
| } |
| } |
| |
| void kgdb_putregs(struct pt_regs *regs, char *buf, int length) |
| { |
| unsigned long *gdb_regs = (unsigned long *)buf; |
| |
| if (length != BFIN_NUM_REGS) |
| kgdb_error(KGDBERR_NOSPACE); |
| |
| if ((unsigned long)gdb_regs & 3) |
| kgdb_error(KGDBERR_ALIGNFAULT); |
| |
| regs->r0 = gdb_regs[BFIN_R0]; |
| regs->r1 = gdb_regs[BFIN_R1]; |
| regs->r2 = gdb_regs[BFIN_R2]; |
| regs->r3 = gdb_regs[BFIN_R3]; |
| regs->r4 = gdb_regs[BFIN_R4]; |
| regs->r5 = gdb_regs[BFIN_R5]; |
| regs->r6 = gdb_regs[BFIN_R6]; |
| regs->r7 = gdb_regs[BFIN_R7]; |
| regs->p0 = gdb_regs[BFIN_P0]; |
| regs->p1 = gdb_regs[BFIN_P1]; |
| regs->p2 = gdb_regs[BFIN_P2]; |
| regs->p3 = gdb_regs[BFIN_P3]; |
| regs->p4 = gdb_regs[BFIN_P4]; |
| regs->p5 = gdb_regs[BFIN_P5]; |
| regs->fp = gdb_regs[BFIN_FP]; |
| /* regs->sp = gdb_regs[BFIN_ ]; */ |
| regs->i0 = gdb_regs[BFIN_I0]; |
| regs->i1 = gdb_regs[BFIN_I1]; |
| regs->i2 = gdb_regs[BFIN_I2]; |
| regs->i3 = gdb_regs[BFIN_I3]; |
| regs->m0 = gdb_regs[BFIN_M0]; |
| regs->m1 = gdb_regs[BFIN_M1]; |
| regs->m2 = gdb_regs[BFIN_M2]; |
| regs->m3 = gdb_regs[BFIN_M3]; |
| regs->b0 = gdb_regs[BFIN_B0]; |
| regs->b1 = gdb_regs[BFIN_B1]; |
| regs->b2 = gdb_regs[BFIN_B2]; |
| regs->b3 = gdb_regs[BFIN_B3]; |
| regs->l0 = gdb_regs[BFIN_L0]; |
| regs->l1 = gdb_regs[BFIN_L1]; |
| regs->l2 = gdb_regs[BFIN_L2]; |
| regs->l3 = gdb_regs[BFIN_L3]; |
| regs->a0x = gdb_regs[BFIN_A0_DOT_X]; |
| regs->a0w = gdb_regs[BFIN_A0_DOT_W]; |
| regs->a1x = gdb_regs[BFIN_A1_DOT_X]; |
| regs->a1w = gdb_regs[BFIN_A1_DOT_W]; |
| regs->rets = gdb_regs[BFIN_RETS]; |
| regs->lc0 = gdb_regs[BFIN_LC0]; |
| regs->lt0 = gdb_regs[BFIN_LT0]; |
| regs->lb0 = gdb_regs[BFIN_LB0]; |
| regs->lc1 = gdb_regs[BFIN_LC1]; |
| regs->lt1 = gdb_regs[BFIN_LT1]; |
| regs->lb1 = gdb_regs[BFIN_LB1]; |
| regs->usp = gdb_regs[BFIN_USP]; |
| regs->syscfg = gdb_regs[BFIN_SYSCFG]; |
| regs->retx = gdb_regs[BFIN_PC]; |
| regs->retn = gdb_regs[BFIN_RETN]; |
| regs->rete = gdb_regs[BFIN_RETE]; |
| regs->pc = gdb_regs[BFIN_PC]; |
| |
| #if 0 /* can't change these */ |
| regs->astat = gdb_regs[BFIN_ASTAT]; |
| regs->seqstat = gdb_regs[BFIN_SEQSTAT]; |
| regs->ipend = gdb_regs[BFIN_IPEND]; |
| #endif |
| |
| } |
| |
| void kgdb_breakpoint(int argc, char * const argv[]) |
| { |
| asm volatile ("excpt 0x1\n"); |
| } |
