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ARM: add a default full_context() method 

If the core doesn't provide an optimized version of this
method, provide one without core-specific optimizations.
Use this to make Cortex-A8 support the "arm reg" command.

Related: make the two register access methods properly static,
have the "set" log a "not halted" error too, and make sure
that the "valid" flag is set on successful reads.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
David Brownell 2009-11-18 14:49:22 -08:00
parent f5093e1605
commit 94dba42313
2 changed files with 27 additions and 12 deletions
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27
src/target/armv4_5.c
View File

@ -299,7 +299,7 @@ static void arm_gdb_dummy_init(void)
register_init_dummy(&arm_gdb_dummy_fps_reg);
}
int armv4_5_get_core_reg(struct reg *reg)
static int armv4_5_get_core_reg(struct reg *reg)
{
int retval;
struct armv4_5_core_reg *armv4_5 = reg->arch_info;
@ -311,13 +311,14 @@ int armv4_5_get_core_reg(struct reg *reg)
return ERROR_TARGET_NOT_HALTED;
}
/* retval = armv4_5->armv4_5_common->full_context(target); */
retval = armv4_5->armv4_5_common->read_core_reg(target, armv4_5->num, armv4_5->mode);
if (retval == ERROR_OK)
reg->valid = 1;
return retval;
}
int armv4_5_set_core_reg(struct reg *reg, uint8_t *buf)
static int armv4_5_set_core_reg(struct reg *reg, uint8_t *buf)
{
struct armv4_5_core_reg *armv4_5 = reg->arch_info;
struct target *target = armv4_5->target;
@ -326,6 +327,7 @@ int armv4_5_set_core_reg(struct reg *reg, uint8_t *buf)
if (target->state != TARGET_HALTED)
{
LOG_ERROR("Target not halted");
return ERROR_TARGET_NOT_HALTED;
}
@ -1038,6 +1040,21 @@ int arm_blank_check_memory(struct target *target,
return ERROR_OK;
}
static int arm_full_context(struct target *target)
{
struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
unsigned num_regs = armv4_5->core_cache->num_regs;
struct reg *reg = armv4_5->core_cache->reg_list;
int retval = ERROR_OK;
for (; num_regs && retval == ERROR_OK; num_regs--, reg++) {
if (reg->valid)
continue;
retval = armv4_5_get_core_reg(reg);
}
return retval;
}
int armv4_5_init_arch_info(struct target *target, struct arm *armv4_5)
{
target->arch_info = armv4_5;
@ -1049,5 +1066,9 @@ int armv4_5_init_arch_info(struct target *target, struct arm *armv4_5)
/* core_type may be overridden by subtype logic */
armv4_5->core_type = ARMV4_5_MODE_ANY;
/* default full_context() has no core-specific optimizations */
if (!armv4_5->full_context && armv4_5->read_core_reg)
armv4_5->full_context = arm_full_context;
return ERROR_OK;
}

12
src/target/cortex_a8.c
View File

@ -1456,10 +1456,6 @@ int cortex_a8_init_arch_info(struct target *target,
struct arm *armv4_5 = &armv7a->armv4_5_common;
struct swjdp_common *swjdp = &armv7a->swjdp_info;
/* REVISIT v7a setup should be in a v7a-specific routine */
armv4_5_init_arch_info(target, armv4_5);
armv7a->common_magic = ARMV7_COMMON_MAGIC;
/* Setup struct cortex_a8_common */
cortex_a8->common_magic = CORTEX_A8_COMMON_MAGIC;
armv4_5->arch_info = armv7a;
@ -1503,12 +1499,10 @@ LOG_DEBUG(" ");
armv4_5->read_core_reg = cortex_a8_read_core_reg;
armv4_5->write_core_reg = cortex_a8_write_core_reg;
// armv4_5->full_context = arm7_9_full_context;
// armv4_5->load_core_reg_u32 = cortex_a8_load_core_reg_u32;
// armv4_5->store_core_reg_u32 = cortex_a8_store_core_reg_u32;
// armv4_5->read_core_reg = armv4_5_read_core_reg; /* this is default */
// armv4_5->write_core_reg = armv4_5_write_core_reg;
/* REVISIT v7a setup should be in a v7a-specific routine */
armv4_5_init_arch_info(target, armv4_5);
armv7a->common_magic = ARMV7_COMMON_MAGIC;
target_register_timer_callback(cortex_a8_handle_target_request, 1, 1, target);