Pico runtime skip init all

src/rp2_common/pico_crt0/crt0.S

@@ -360,7 +360,7 @@ binary_info_header:
 _entry_point:
 
 #if PICO_NO_FLASH
-    // on the NO_FLASH case, we do not do a rest thru bootrom below, so the RCP may or may not have been initialized:
+    // on the NO_FLASH case, we do not do a reset thru bootrom below, so the RCP may or may not have been initialized:
     //
     // in the normal (e.g. UF2 download etc. case) we will have passed thru bootrom initialization, but if
     // a NO_FLASH binary is loaded by the debugger, and run directly after a reset, then we won't have.
@@ -388,6 +388,9 @@ _entry_point:
     msr msplim, r0
 #endif
 
+    // note that theoretically we should also call bootrom_state_reset here too, however
+    // we expect it to have been called by the debugger
+
     ldr r0, =__vectors
     // Vector through our own table (SP, VTOR will not have been set up at
     // this point). Same path for debugger entry and bootloader entry.

src/rp2_common/pico_runtime/include/pico/runtime.h

@@ -49,13 +49,26 @@ void runtime_init(void);
 
 void runtime_run_initializers(void);
 void runtime_run_per_core_initializers(void);
+// PICO_CONFIG: PICO_RUNTIME_SKIP_INIT_ALL, Skip calling of `runtime_init_` functions during runtime init, type=bool, default=0, group=pico_runtime_init
+#if !PICO_RUNTIME_SKIP_INIT_ALL
+#define PICO_RUNTIME_SKIP_INIT_ALL 0
+#endif
 
 #ifndef PICO_RUNTIME_INIT_FUNC
+#if !PICO_RUNTIME_SKIP_INIT_ALL
 #define PICO_RUNTIME_INIT_FUNC(func, priority_string) uintptr_t __used __attribute__((section(".preinit_array." priority_string))) __pre_init_ ## func = (uintptr_t)(void (*)(void)) (func)
+#else
+// define the variable in case it is referenced, but do not stick it in the preinit_array
+#define PICO_RUNTIME_INIT_FUNC(func, priority_string) uintptr_t __pre_init_ ## func;
+#endif
 #endif
 #else
 #ifndef PICO_RUNTIME_INIT_FUNC
+#if !PICO_RUNTIME_INIT_SKIP_INIT_ALL
 #define PICO_RUNTIME_INIT_FUNC(func, priority_string) __pre_init func, priority_string
+#else
+#define PICO_RUNTIME_INIT_FUNC(func, priority_string)
+#endif
 #endif
 #endif
 #define PICO_RUNTIME_INIT_FUNC_HW(func, priority_string) PICO_RUNTIME_INIT_FUNC(func, priority_string)

src/rp2_common/pico_runtime_init/include/pico/runtime_init.h

@@ -80,7 +80,7 @@ void runtime_init_bootrom_reset(void);
 #endif
 
 // ---------------------------------------------------------------------------------------
-// Non-boot core eset of bootrom state, not needed if only using core 0 not used on RP2040
+// Non-boot core reset of bootrom state, not needed if only using core 0 not used on RP2040
 // ---------------------------------------------------------------------------------------
 #ifndef PICO_RUNTIME_INIT_PER_CORE_BOOTROM_RESET
 #define PICO_RUNTIME_INIT_PER_CORE_BOOTROM_RESET "00051"