Adding RP2350 SDK and target framework (#13988)

* Adding RP2350 SDK and target framework

* Spacing

* Removing board definitions

lib/main/pico-sdk/rp2_common/pico_int64_ops/include/pico/int64_ops.h

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef _PICO_INT64_OPS_H
+#define _PICO_INT64_OPS_H
+
+#include "pico/types.h"
+
+/** \file int64_ops.h
+ *  \defgroup pico_int64_ops pico_int64_ops
+ *
+ * \brief Optimized replacement implementations of the compiler built-in 64 bit multiplication
+ *
+ * This library does not provide any additional functions
+*/
+
+#endif

lib/main/pico-sdk/rp2_common/pico_int64_ops/pico_int64_ops_aeabi.S

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include "pico/asm_helper.S"
+
+pico_default_asm_setup
+
+.macro int64_section name
+#if PICO_INT64_OPS_IN_RAM
+.section RAM_SECTION_NAME(\name), "ax"
+#else
+.section SECTION_NAME(\name), "ax"
+#endif
+.endm
+
+int64_section __aeabi_lmul
+
+wrapper_func __aeabi_lmul
+    muls   r1, r2
+    muls   r3, r0
+    adds   r1, r3
+    mov    r12, r1
+    lsrs   r1, r2, #16
+    uxth   r3, r0
+    muls   r3, r1
+    push   {r4}
+    lsrs   r4, r0, #16
+    muls   r1, r4
+    uxth   r2, r2
+    uxth   r0, r0
+    muls   r0, r2
+    muls   r2, r4
+    lsls   r4, r3, #16
+    lsrs   r3, #16
+    adds   r0, r4
+    pop    {r4}
+    adcs   r1, r3
+    lsls   r3, r2, #16
+    lsrs   r2, #16
+    adds   r0, r3
+    adcs   r1, r2
+    add    r1, r12
+    bx lr