diff options
Diffstat (limited to 'arch/blackfin/lib/kgdb.c')
| -rw-r--r-- | arch/blackfin/lib/kgdb.c | 423 |
1 files changed, 423 insertions, 0 deletions
diff --git a/arch/blackfin/lib/kgdb.c b/arch/blackfin/lib/kgdb.c new file mode 100644 index 0000000..bd62d71 --- /dev/null +++ b/arch/blackfin/lib/kgdb.c @@ -0,0 +1,423 @@ +/* + * 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 *argv[]) +{ + asm volatile ("excpt 0x1\n"); +} |