From ee793f0fcbd2d7e4ad08e61d242ba178e8909b45 Mon Sep 17 00:00:00 2001 From: oharboe Date: Wed, 7 May 2008 14:25:34 +0000 Subject: This matters for embedded devices, but is probably not observably better for PC hosted OpenOCD. git-svn-id: svn://svn.berlios.de/openocd/trunk@647 b42882b7-edfa-0310-969c-e2dbd0fdcd60 --- src/target/arm7tdmi.c | 96 ++++++++++++++++----------------------------------- 1 file changed, 30 insertions(+), 66 deletions(-) (limited to 'src/target/arm7tdmi.c') diff --git a/src/target/arm7tdmi.c b/src/target/arm7tdmi.c index 53559a23..549f6a67 100644 --- a/src/target/arm7tdmi.c +++ b/src/target/arm7tdmi.c @@ -148,66 +148,30 @@ int arm7tdmi_examine_debug_reason(target_t *target) return ERROR_OK; } -/* put an instruction in the ARM7TDMI pipeline or write the data bus, and optionally read data */ -int arm7tdmi_clock_out(arm_jtag_t *jtag_info, u32 out, u32 *in, int breakpoint) +static int arm7tdmi_num_bits[]={1, 32}; +static __inline int arm7tdmi_clock_out_inner(arm_jtag_t *jtag_info, u32 out, int breakpoint) { - scan_field_t fields[2]; - u8 out_buf[4]; - u8 breakpoint_buf; - - buf_set_u32(out_buf, 0, 32, flip_u32(out, 32)); - buf_set_u32(&breakpoint_buf, 0, 1, breakpoint); + u32 values[2]={breakpoint, flip_u32(out, 32)}; + + jtag_add_dr_out(jtag_info->chain_pos, + 2, + arm7tdmi_num_bits, + values, + -1); + + jtag_add_runtest(0, -1); + return ERROR_OK; +} + +/* put an instruction in the ARM7TDMI pipeline or write the data bus, and optionally read data */ +static __inline int arm7tdmi_clock_out(arm_jtag_t *jtag_info, u32 out, u32 *deprecated, int breakpoint) +{ jtag_add_end_state(TAP_PD); arm_jtag_scann(jtag_info, 0x1); arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL); - fields[0].device = jtag_info->chain_pos; - fields[0].num_bits = 1; - fields[0].out_value = &breakpoint_buf; - fields[0].out_mask = NULL; - fields[0].in_value = NULL; - fields[0].in_check_value = NULL; - fields[0].in_check_mask = NULL; - fields[0].in_handler = NULL; - fields[0].in_handler_priv = NULL; - - fields[1].device = jtag_info->chain_pos; - fields[1].num_bits = 32; - fields[1].out_value = out_buf; - fields[1].out_mask = NULL; - fields[1].in_value = NULL; - if (in) - { - fields[1].in_handler = arm_jtag_buf_to_u32_flip; - fields[1].in_handler_priv = in; - } - else - { - fields[1].in_handler = NULL; - fields[1].in_handler_priv = NULL; - } - fields[1].in_check_value = NULL; - fields[1].in_check_mask = NULL; - - jtag_add_dr_scan(2, fields, -1); - - jtag_add_runtest(0, -1); - -#ifdef _DEBUG_INSTRUCTION_EXECUTION_ -{ - jtag_execute_queue(); - - if (in) - { - LOG_DEBUG("out: 0x%8.8x, in: 0x%8.8x", out, *in); - } - else - LOG_DEBUG("out: 0x%8.8x", out); -} -#endif - - return ERROR_OK; + return arm7tdmi_clock_out_inner(jtag_info, out, breakpoint); } /* clock the target, reading the databus */ @@ -534,17 +498,17 @@ void arm7tdmi_write_core_regs(target_t *target, u32 mask, u32 core_regs[16]) arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 0), NULL, 0); /* fetch NOP, LDM in DECODE stage */ - arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0); /* fetch NOP, LDM in EXECUTE stage (1st cycle) */ - arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0); for (i = 0; i <= 15; i++) { if (mask & (1 << i)) /* nothing fetched, LDM still in EXECUTE (1+i cycle) */ - arm7tdmi_clock_out(jtag_info, core_regs[i], NULL, 0); + arm7tdmi_clock_out_inner(jtag_info, core_regs[i], 0); } - arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0); } @@ -644,19 +608,19 @@ void arm7tdmi_write_pc(target_t *target, u32 pc) */ arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x8000, 0, 0), NULL, 0); /* fetch NOP, LDM in DECODE stage */ - arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0); /* fetch NOP, LDM in EXECUTE stage (1st cycle) */ - arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0); /* nothing fetched, LDM in EXECUTE stage (1st cycle) load register */ - arm7tdmi_clock_out(jtag_info, pc, NULL, 0); + arm7tdmi_clock_out_inner(jtag_info, pc, 0); /* nothing fetched, LDM in EXECUTE stage (2nd cycle) load register */ - arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0); /* nothing fetched, LDM in EXECUTE stage (3rd cycle) load register */ - arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0); /* fetch NOP, LDM in EXECUTE stage (4th cycle) */ - arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0); /* fetch NOP, LDM in EXECUTE stage (5th cycle) */ - arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0); } void arm7tdmi_branch_resume(target_t *target) @@ -667,7 +631,7 @@ void arm7tdmi_branch_resume(target_t *target) arm_jtag_t *jtag_info = &arm7_9->jtag_info; arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1); - arm7tdmi_clock_out(jtag_info, ARMV4_5_B(0xfffffa, 0), NULL, 0); + arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_B(0xfffffa, 0), 0); } -- cgit v1.2.3