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add const keyword to some APIs
[openocd.git] / src / target / target.c
diff --git a/src/target/target.c b/src/target/target.c
index 66e869992fbda45f8dea68eb0a121f2f95c58dfd..575a99ce0beaf4770a58c2b3edb4526e581d1b12 100644 (file)
--- a/src/target/target.c
+++ b/src/target/target.c
@@ -460,13 +460,14 @@ int target_process_reset(struct command_context_s *cmd_ctx, enum target_reset_mo
        return retval;
 }
 
-static int default_virt2phys(struct target_s *target, uint32_t virtual, uint32_t *physical)
+static int identity_virt2phys(struct target_s *target,
+               uint32_t virtual, uint32_t *physical)
 {
        *physical = virtual;
        return ERROR_OK;
 }
 
-static int default_mmu(struct target_s *target, int *enabled)
+static int no_mmu(struct target_s *target, int *enabled)
 {
        *enabled = 0;
        return ERROR_OK;
@@ -663,13 +664,13 @@ void target_reset_examined(struct target_s *target)
 
 static int default_mrc(struct target_s *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value)
 {
-       LOG_ERROR("Not implemented");
+       LOG_ERROR("Not implemented: %s", __func__);
        return ERROR_FAIL;
 }
 
 static int default_mcr(struct target_s *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value)
 {
-       LOG_ERROR("Not implemented");
+       LOG_ERROR("Not implemented: %s", __func__);
        return ERROR_FAIL;
 }
 
@@ -737,26 +738,30 @@ int target_mcr(struct target_s *target, int cpnum, uint32_t op1, uint32_t op2, u
        return target->type->mcr(target, cpnum, op1, op2, CRn, CRm, value);
 }
 
-static int default_read_phys_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
+static int
+err_read_phys_memory(struct target_s *target, uint32_t address,
+               uint32_t size, uint32_t count, uint8_t *buffer)
 {
-       LOG_ERROR("Not implemented");
+       LOG_ERROR("Not implemented: %s", __func__);
        return ERROR_FAIL;
 }
 
-static int default_write_phys_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
+static int
+err_write_phys_memory(struct target_s *target, uint32_t address,
+               uint32_t size, uint32_t count, uint8_t *buffer)
 {
-       LOG_ERROR("Not implemented");
+       LOG_ERROR("Not implemented: %s", __func__);
        return ERROR_FAIL;
 }
 
-
 int target_init(struct command_context_s *cmd_ctx)
 {
-       target_t *target = all_targets;
+       struct target_s *target;
        int retval;
 
-       while (target)
-       {
+       for (target = all_targets; target; target = target->next) {
+               struct target_type_s *type = target->type;
+
                target_reset_examined(target);
                if (target->type->examine == NULL)
                {
@@ -769,22 +774,10 @@ int target_init(struct command_context_s *cmd_ctx)
                        return retval;
                }
 
-               /* Set up default functions if none are provided by target */
-               if (target->type->virt2phys == NULL)
-               {
-                       target->type->virt2phys = default_virt2phys;
-               }
-
-               if (target->type->read_phys_memory == NULL)
-               {
-                       target->type->read_phys_memory = default_read_phys_memory;
-               }
-
-               if (target->type->write_phys_memory == NULL)
-               {
-                       target->type->write_phys_memory = default_write_phys_memory;
-               }
-
+               /**
+                * @todo MCR/MRC are ARM-specific; don't require them in
+                * all targets, or for ARMs without coprocessors.
+                */
                if (target->type->mcr == NULL)
                {
                        target->type->mcr = default_mcr;
@@ -807,6 +800,12 @@ int target_init(struct command_context_s *cmd_ctx)
                }
 
 
+               /**
+                * @todo get rid of those *memory_imp() methods, now that all
+                * callers are using target_*_memory() accessors ... and make
+                * sure the "physical" paths handle the same issues.
+                */
+
                /* a non-invasive way(in terms of patches) to add some code that
                 * runs before the type->write/read_memory implementation
                 */
@@ -819,11 +818,45 @@ int target_init(struct command_context_s *cmd_ctx)
                target->type->run_algorithm_imp = target->type->run_algorithm;
                target->type->run_algorithm = target_run_algorithm_imp;
 
-               if (target->type->mmu == NULL)
-               {
-                       target->type->mmu = default_mmu;
+               /* Sanity-check MMU support ... stub in what we must, to help
+                * implement it in stages, but warn if we need to do so.
+                */
+               if (type->mmu) {
+                       if (type->write_phys_memory == NULL) {
+                               LOG_ERROR("type '%s' is missing %s",
+                                               type->name,
+                                               "write_phys_memory");
+                               type->write_phys_memory = err_write_phys_memory;
+                       }
+                       if (type->read_phys_memory == NULL) {
+                               LOG_ERROR("type '%s' is missing %s",
+                                               type->name,
+                                               "read_phys_memory");
+                               type->read_phys_memory = err_read_phys_memory;
+                       }
+                       if (type->virt2phys == NULL) {
+                               LOG_ERROR("type '%s' is missing %s",
+                                               type->name,
+                                               "virt2phys");
+                               type->virt2phys = identity_virt2phys;
+                       }
+
+               /* Make sure no-MMU targets all behave the same:  make no
+                * distinction between physical and virtual addresses, and
+                * ensure that virt2phys() is always an identity mapping.
+                */
+               } else {
+                       if (type->write_phys_memory
+                                       || type->read_phys_memory
+                                       || type->virt2phys)
+                               LOG_WARNING("type '%s' has broken MMU hooks",
+                                               type->name);
+
+                       type->mmu = no_mmu;
+                       type->write_phys_memory = type->write_memory;
+                       type->read_phys_memory = type->read_memory;
+                       type->virt2phys = identity_virt2phys;
                }
-               target = target->next;
        }
 
        if (all_targets)
@@ -2895,7 +2928,7 @@ static void writeString(FILE *f, char *s)
 }
 
 /* Dump a gmon.out histogram file. */
-static void writeGmon(uint32_t *samples, uint32_t sampleNum, char *filename)
+static void writeGmon(uint32_t *samples, uint32_t sampleNum, const char *filename)
 {
        uint32_t i;
        FILE *f = fopen(filename, "w");
@@ -4777,10 +4810,11 @@ int target_register_user_commands(struct command_context_s *cmd_ctx)
                        "loads active fast load image to current target "
                        "- mainly for profiling purposes");
 
-
+       /** @todo don't register virt2phys() unless target supports it */
        register_command(cmd_ctx, NULL, "virt2phys",
                        handle_virt2phys_command, COMMAND_ANY,
                        "translate a virtual address into a physical address");
+
        register_command(cmd_ctx,  NULL, "reg",
                        handle_reg_command, COMMAND_EXEC,
                        "display or set a register");
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