diff options
Diffstat (limited to 'arch/blackfin/kernel/pseudodbg.c')
| -rw-r--r-- | arch/blackfin/kernel/pseudodbg.c | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/arch/blackfin/kernel/pseudodbg.c b/arch/blackfin/kernel/pseudodbg.c deleted file mode 100644 index db85bc94334e..000000000000 --- a/arch/blackfin/kernel/pseudodbg.c +++ /dev/null @@ -1,191 +0,0 @@ -/* The fake debug assert instructions - * - * Copyright 2010 Analog Devices Inc. - * - * Licensed under the GPL-2 or later - */ - -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/ptrace.h> - -const char * const greg_names[] = { - "R0", "R1", "R2", "R3", "R4", "R5", "R6", "R7", - "P0", "P1", "P2", "P3", "P4", "P5", "SP", "FP", - "I0", "I1", "I2", "I3", "M0", "M1", "M2", "M3", - "B0", "B1", "B2", "B3", "L0", "L1", "L2", "L3", - "A0.X", "A0.W", "A1.X", "A1.W", "<res>", "<res>", "ASTAT", "RETS", - "<res>", "<res>", "<res>", "<res>", "<res>", "<res>", "<res>", "<res>", - "LC0", "LT0", "LB0", "LC1", "LT1", "LB1", "CYCLES", "CYCLES2", - "USP", "SEQSTAT", "SYSCFG", "RETI", "RETX", "RETN", "RETE", "EMUDAT", -}; - -static const char *get_allreg_name(int grp, int reg) -{ - return greg_names[(grp << 3) | reg]; -} - -/* - * Unfortunately, the pt_regs structure is not laid out the same way as the - * hardware register file, so we need to do some fix ups. - * - * CYCLES is not stored in the pt_regs structure - so, we just read it from - * the hardware. - * - * Don't support: - * - All reserved registers - * - All in group 7 are (supervisors only) - */ - -static bool fix_up_reg(struct pt_regs *fp, long *value, int grp, int reg) -{ - long *val = &fp->r0; - unsigned long tmp; - - /* Only do Dregs and Pregs for now */ - if (grp == 5 || - (grp == 4 && (reg == 4 || reg == 5)) || - (grp == 7)) - return false; - - if (grp == 0 || (grp == 1 && reg < 6)) - val -= (reg + 8 * grp); - else if (grp == 1 && reg == 6) - val = &fp->usp; - else if (grp == 1 && reg == 7) - val = &fp->fp; - else if (grp == 2) { - val = &fp->i0; - val -= reg; - } else if (grp == 3 && reg >= 4) { - val = &fp->l0; - val -= (reg - 4); - } else if (grp == 3 && reg < 4) { - val = &fp->b0; - val -= reg; - } else if (grp == 4 && reg < 4) { - val = &fp->a0x; - val -= reg; - } else if (grp == 4 && reg == 6) - val = &fp->astat; - else if (grp == 4 && reg == 7) - val = &fp->rets; - else if (grp == 6 && reg < 6) { - val = &fp->lc0; - val -= reg; - } else if (grp == 6 && reg == 6) { - __asm__ __volatile__("%0 = cycles;\n" : "=d"(tmp)); - val = &tmp; - } else if (grp == 6 && reg == 7) { - __asm__ __volatile__("%0 = cycles2;\n" : "=d"(tmp)); - val = &tmp; - } - - *value = *val; - return true; - -} - -#define PseudoDbg_Assert_opcode 0xf0000000 -#define PseudoDbg_Assert_expected_bits 0 -#define PseudoDbg_Assert_expected_mask 0xffff -#define PseudoDbg_Assert_regtest_bits 16 -#define PseudoDbg_Assert_regtest_mask 0x7 -#define PseudoDbg_Assert_grp_bits 19 -#define PseudoDbg_Assert_grp_mask 0x7 -#define PseudoDbg_Assert_dbgop_bits 22 -#define PseudoDbg_Assert_dbgop_mask 0x3 -#define PseudoDbg_Assert_dontcare_bits 24 -#define PseudoDbg_Assert_dontcare_mask 0x7 -#define PseudoDbg_Assert_code_bits 27 -#define PseudoDbg_Assert_code_mask 0x1f - -/* - * DBGA - debug assert - */ -bool execute_pseudodbg_assert(struct pt_regs *fp, unsigned int opcode) -{ - int expected = ((opcode >> PseudoDbg_Assert_expected_bits) & PseudoDbg_Assert_expected_mask); - int dbgop = ((opcode >> (PseudoDbg_Assert_dbgop_bits)) & PseudoDbg_Assert_dbgop_mask); - int grp = ((opcode >> (PseudoDbg_Assert_grp_bits)) & PseudoDbg_Assert_grp_mask); - int regtest = ((opcode >> (PseudoDbg_Assert_regtest_bits)) & PseudoDbg_Assert_regtest_mask); - long value; - - if ((opcode & 0xFF000000) != PseudoDbg_Assert_opcode) - return false; - - if (!fix_up_reg(fp, &value, grp, regtest)) - return false; - - if (dbgop == 0 || dbgop == 2) { - /* DBGA ( regs_lo , uimm16 ) */ - /* DBGAL ( regs , uimm16 ) */ - if (expected != (value & 0xFFFF)) { - pr_notice("DBGA (%s.L,0x%x) failure, got 0x%x\n", - get_allreg_name(grp, regtest), - expected, (unsigned int)(value & 0xFFFF)); - return false; - } - - } else if (dbgop == 1 || dbgop == 3) { - /* DBGA ( regs_hi , uimm16 ) */ - /* DBGAH ( regs , uimm16 ) */ - if (expected != ((value >> 16) & 0xFFFF)) { - pr_notice("DBGA (%s.H,0x%x) failure, got 0x%x\n", - get_allreg_name(grp, regtest), - expected, (unsigned int)((value >> 16) & 0xFFFF)); - return false; - } - } - - fp->pc += 4; - return true; -} - -#define PseudoDbg_opcode 0xf8000000 -#define PseudoDbg_reg_bits 0 -#define PseudoDbg_reg_mask 0x7 -#define PseudoDbg_grp_bits 3 -#define PseudoDbg_grp_mask 0x7 -#define PseudoDbg_fn_bits 6 -#define PseudoDbg_fn_mask 0x3 -#define PseudoDbg_code_bits 8 -#define PseudoDbg_code_mask 0xff - -/* - * DBG - debug (dump a register value out) - */ -bool execute_pseudodbg(struct pt_regs *fp, unsigned int opcode) -{ - int grp, fn, reg; - long value, value1; - - if ((opcode & 0xFF000000) != PseudoDbg_opcode) - return false; - - opcode >>= 16; - grp = ((opcode >> PseudoDbg_grp_bits) & PseudoDbg_reg_mask); - fn = ((opcode >> PseudoDbg_fn_bits) & PseudoDbg_fn_mask); - reg = ((opcode >> PseudoDbg_reg_bits) & PseudoDbg_reg_mask); - - if (fn == 3 && (reg == 0 || reg == 1)) { - if (!fix_up_reg(fp, &value, 4, 2 * reg)) - return false; - if (!fix_up_reg(fp, &value1, 4, 2 * reg + 1)) - return false; - - pr_notice("DBG A%i = %02lx%08lx\n", reg, value & 0xFF, value1); - fp->pc += 2; - return true; - - } else if (fn == 0) { - if (!fix_up_reg(fp, &value, grp, reg)) - return false; - - pr_notice("DBG %s = %08lx\n", get_allreg_name(grp, reg), value); - fp->pc += 2; - return true; - } - - return false; -} |