From ce1feaa7322affd3b979c9fe93dd8f7462ea9eca Mon Sep 17 00:00:00 2001 From: David Brownell Date: Sun, 21 Feb 2010 14:28:53 -0800 Subject: ARMv7-M: start using "struct arm" This sets up a few of the core "struct arm" data structures so they can be used with ARMv7-M cores. Specifically, it: - defines new ARM core_modes to match the microcontroller modes (e.g. HANDLER not IRQ, and two types of thread mode); - Establishes a new microcontroller "core_type", which can be used to make sure v7-M (and v6-M) cores are handled right; - adds "struct arm" to "struct armv7m" and arranges for the target_to_armv7m() converter to use it; - sets up the arm.core_cache and arm.cpsr values - makes the Cortex-M3 code maintain arm.map and arm.core_mode. This is currently set up as a parallel data structure, primarily to minimize special cases for the semihosting support with microcontroller profile cores. Later patches can rip out the duplicative ARMv7-M support and start reusing core ARM code. Signed-off-by: David Brownell --- src/target/armv7m.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) (limited to 'src/target/armv7m.c') diff --git a/src/target/armv7m.c b/src/target/armv7m.c index 9fe705af..faa886b4 100644 --- a/src/target/armv7m.c +++ b/src/target/armv7m.c @@ -473,6 +473,7 @@ int armv7m_run_algorithm(struct target *target, int armv7m_arch_state(struct target *target) { struct armv7m_common *armv7m = target_to_armv7m(target); + struct arm *arm = &armv7m->arm; uint32_t ctrl, sp; ctrl = buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_CONTROL].value, 0, 32); @@ -483,7 +484,7 @@ int armv7m_arch_state(struct target *target) debug_reason_name(target), armv7m_mode_strings[armv7m->core_mode], armv7m_exception_string(armv7m->exception_number), - buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32), + buf_get_u32(arm->cpsr->value, 0, 32), buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_PC].value, 0, 32), (ctrl & 0x02) ? 'p' : 'm', sp); @@ -499,6 +500,7 @@ static const struct reg_arch_type armv7m_reg_type = { struct reg_cache *armv7m_build_reg_cache(struct target *target) { struct armv7m_common *armv7m = target_to_armv7m(target); + struct arm *arm = &armv7m->arm; int num_regs = ARMV7M_NUM_REGS; struct reg_cache **cache_p = register_get_last_cache_p(&target->reg_cache); struct reg_cache *cache = malloc(sizeof(struct reg_cache)); @@ -532,19 +534,28 @@ struct reg_cache *armv7m_build_reg_cache(struct target *target) reg_list[i].arch_info = &arch_info[i]; } + arm->cpsr = reg_list + ARMV7M_xPSR; + arm->core_cache = cache; return cache; } /** Sets up target as a generic ARMv7-M core */ int armv7m_init_arch_info(struct target *target, struct armv7m_common *armv7m) { + struct arm *arm = &armv7m->arm; + armv7m->common_magic = ARMV7M_COMMON_MAGIC; - target->arch_info = armv7m; + arm->core_type = ARM_MODE_THREAD; + arm->arch_info = armv7m; + + /* FIXME remove v7m-specific r/w core_reg functions; + * use the generic ARM core support.. + */ armv7m->read_core_reg = armv7m_read_core_reg; armv7m->write_core_reg = armv7m_write_core_reg; - return ERROR_OK; + return arm_init_arch_info(target, arm); } /** Generates a CRC32 checksum of a memory region. */ -- cgit v1.2.3