diff options
Diffstat (limited to 'src/target/xscale.c')
| -rw-r--r-- | src/target/xscale.c | 68 |
1 files changed, 30 insertions, 38 deletions
diff --git a/src/target/xscale.c b/src/target/xscale.c index 0680c52..ccb1de5 100644 --- a/src/target/xscale.c +++ b/src/target/xscale.c @@ -62,7 +62,7 @@ static int xscale_resume(struct target *, int current, uint32_t address, int handle_breakpoints, int debug_execution); static int xscale_debug_entry(struct target *); -static int xscale_restore_context(struct target *); +static int xscale_restore_banked(struct target *); static int xscale_get_reg(struct reg *reg); static int xscale_set_reg(struct reg *reg, uint8_t *buf); static int xscale_set_breakpoint(struct target *, struct breakpoint *); @@ -1251,7 +1251,7 @@ static int xscale_resume(struct target *target, int current, xscale_enable_single_step(target, next_pc); /* restore banked registers */ - xscale_restore_context(target); + retval = xscale_restore_banked(target); /* send resume request (command 0x30 or 0x31) * clean the trace buffer if it is to be enabled (0x62) */ @@ -1296,7 +1296,7 @@ static int xscale_resume(struct target *target, int current, xscale_enable_watchpoints(target); /* restore banked registers */ - xscale_restore_context(target); + retval = xscale_restore_banked(target); /* send resume request (command 0x30 or 0x31) * clean the trace buffer if it is to be enabled (0x62) */ @@ -1371,7 +1371,7 @@ static int xscale_step_inner(struct target *target, int current, return retval; /* restore banked registers */ - if ((retval = xscale_restore_context(target)) != ERROR_OK) + if ((retval = xscale_restore_banked(target)) != ERROR_OK) return retval; /* send resume request (command 0x30 or 0x31) @@ -1755,7 +1755,7 @@ static int xscale_full_context(struct target *target) return ERROR_OK; } -static int xscale_restore_context(struct target *target) +static int xscale_restore_banked(struct target *target) { struct arm *armv4_5 = target_to_armv4_5(target); @@ -1774,8 +1774,8 @@ static int xscale_restore_context(struct target *target) */ for (i = 1; i < 7; i++) { - int dirty = 0; enum armv4_5_mode mode = armv4_5_number_to_mode(i); + struct reg *r; if (mode == ARMV4_5_MODE_USR) continue; @@ -1785,7 +1785,7 @@ static int xscale_restore_context(struct target *target) { if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, j).dirty) - dirty = 1; + goto dirty; } /* if not USR/SYS, check if the SPSR needs to be written */ @@ -1793,43 +1793,35 @@ static int xscale_restore_context(struct target *target) { if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, 16).dirty) - dirty = 1; + goto dirty; } - /* is there anything to flush for this mode? */ - if (dirty) - { - uint32_t tmp_cpsr; - struct reg *r; - - /* command 0x1: "send banked registers" */ - xscale_send_u32(target, 0x1); + /* there's nothing to flush for this mode */ + continue; - tmp_cpsr = 0x0; - tmp_cpsr |= mode; - tmp_cpsr |= 0xc0; /* I/F bits */ +dirty: + /* command 0x1: "send banked registers" */ + xscale_send_u32(target, 0x1); - /* send CPSR for desired mode */ - xscale_send_u32(target, tmp_cpsr); + /* send CPSR for desired mode */ + xscale_send_u32(target, mode | 0xc0 /* I/F bits */); - /* send banked registers, r8 to r14, and spsr if not in USR/SYS mode */ - for (j = 8; j <= 14; j++) - { - r = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, - mode, j); - xscale_send_u32(target, - buf_get_u32(r->value, 0, 32)); - r->dirty = false; - } + /* send r8 to r14/lr ... only FIQ needs more than r13..r14, + * but this protocol doesn't understand that nuance. + */ + for (j = 8; j <= 14; j++) { + r = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, + mode, j); + xscale_send_u32(target, buf_get_u32(r->value, 0, 32)); + r->dirty = false; + } - if (mode != ARMV4_5_MODE_SYS) - { - r = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, - mode, 16); - xscale_send_u32(target, - buf_get_u32(r->value, 0, 32)); - r->dirty = false; - } + /* send spsr if not in USR/SYS mode */ + if (mode != ARMV4_5_MODE_SYS) { + r = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, + mode, 16); + xscale_send_u32(target, buf_get_u32(r->value, 0, 32)); + r->dirty = false; } } |