Draft: support for rp2350

Author: danielinux

config/examples/rp2350.config

@@ -0,0 +1,25 @@
+ARCH?=ARM
+TZEN?=0
+TARGET?=rp2350
+SIGN?=ECC256
+HASH?=SHA256
+DEBUG?=0
+VTOR?=1
+CORTEX_M33?=1
+NO_ASM?=0
+NO_MPU=1
+EXT_FLASH?=0
+SPI_FLASH?=0
+ALLOW_DOWNGRADE?=0
+SPMATH?=1
+RAM_CODE?=1
+WOLFBOOT_PARTITION_SIZE?=0x40000
+WOLFBOOT_SECTOR_SIZE?=0x2000
+WOLFBOOT_PARTITION_BOOT_ADDRESS?=0x10040000
+WOLFBOOT_PARTITION_UPDATE_ADDRESS?=10080000
+WOLFBOOT_PARTITION_SWAP_ADDRESS?=0x100C0000
+
+PICO_SDK_PATH=/home/dan/src/pico-sdk
+
+# Use a larger image header size to enforce alignment requirements for the interrupt vector table
+IMAGE_HEADER_SIZE?=1024

hal/rp2350-ns.ld

@@ -0,0 +1,50 @@
+MEMORY
+{
+    FLASH (rx) :    ORIGIN = @WOLFBOOT_ORIGIN@, LENGTH = @BOOTLOADER_PARTITION_SIZE@
+    RAM (rwx) :     ORIGIN = 0x20000000, LENGTH = 0x00082000
+}
+
+SECTIONS
+{
+    .text :
+    {
+        _start_text = .;
+        KEEP(*(.isr_vector))
+        *(.text*)
+        *(.rodata*)
+        . = ALIGN(8);
+        _end_text = .;
+    } > FLASH
+
+    .edidx :
+    {
+        . = ALIGN(4);
+        *(.ARM.exidx*)
+    } > FLASH
+
+    _stored_data = .;
+    .data : AT (_stored_data)
+    {
+        _start_data = .;
+        KEEP(*(.data*))
+        . = ALIGN(8);
+        KEEP(*(.ramcode))
+        . = ALIGN(8);
+        _end_data = .;
+    } > RAM
+
+    .bss (NOLOAD) :
+    {
+        _start_bss = .;
+        __bss_start__ = .;
+        *(.bss*)
+        *(COMMON)
+        . = ALIGN(8);
+        _end_bss = .;
+        __bss_end__ = .;
+        _end = .;
+    } > RAM
+    . = ALIGN(8);
+}
+
+END_STACK = ORIGIN(RAM) + LENGTH(RAM);

hal/rp2350.c

@@ -0,0 +1,80 @@
+/* rp2350.c
+ *
+ * Stubs for custom HAL implementation. Defines the 
+ * functions used by wolfboot for a specific target.
+ *
+ * Copyright (C) 2021 wolfSSL Inc.
+ *
+ * This file is part of wolfBoot.
+ *
+ * wolfBoot is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfBoot is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
+ */
+
+#include <stdint.h>
+#include <target.h>
+#include "image.h"
+
+
+#define SIO_BASE (0xD0000000U)
+#define SIO_CPUID (*(volatile uint32_t *)(SIO_BASE + 0x00))
+
+const uint32_t VTOR_ADDR = 0xE000ED08;
+const uint32_t BOOTROM_VTABLE_OFFSET = 0x00000000;
+
+void __attribute__((naked)) jmp_to_rom_vector(void)
+{
+    __asm volatile(
+        "ldr r0, =BOOTROM_VTABLE_OFFSET\n"
+        "ldr r1, =VTOR_ADDR\n"
+        "str r0, [r1]\n"
+        "ldmia r0!, {r1, r2}\n"
+        "msr msp, r1\n"
+        "bx r2\n"
+    );
+}
+
+#ifdef __WOLFBOOT
+void hal_init(void)
+{
+    /* Keep CPU1 in ROM */
+    if (SIO_CPUID != 0) {
+        jmp_to_rom_vector();
+    }
+}
+
+void hal_prepare_boot(void)
+{
+}
+
+#endif
+
+int RAMFUNCTION hal_flash_write(uint32_t address, const uint8_t *data, int len)
+{
+    return 0; /* on success. */
+}
+
+void RAMFUNCTION hal_flash_unlock(void)
+{
+}
+
+void RAMFUNCTION hal_flash_lock(void)
+{
+}
+
+int RAMFUNCTION hal_flash_erase(uint32_t address, int len)
+{
+    return 0; /* on success. */
+}
+

hal/rp2350.ld

@@ -0,0 +1,71 @@
+MEMORY
+{
+    FLASH (rx) :    ORIGIN = @WOLFBOOT_ORIGIN@, LENGTH = @BOOTLOADER_PARTITION_SIZE@ - 0x20000
+    RAM (rwx) :     ORIGIN = 0x20000000, LENGTH = 0x00012000
+    RAM_HEAP (rw):  ORIGIN = 0x20012000, LENGTH = 0xc000 /* 49152 B Heap for wolfcrypt/PKCS11 */
+    RAM_KV (rw):    ORIGIN = 0x2001e000, LENGTH = 0x2000
+    FLASH_KEYVAULT(rw): ORIGIN = @WOLFBOOT_ORIGIN@ + 0x20000, LENGTH = 0x18000
+    FLASH_NSC(rx): ORIGIN = @WOLFBOOT_ORIGIN@ + 0x38000, LENGTH = 0x8000
+}
+
+SECTIONS
+{
+    .text :
+    {
+        _start_text = .;
+        KEEP(*(.isr_vector))
+        *(.text*)
+        *(.rodata*)
+        . = ALIGN(8);
+        _end_text = .;
+    } > FLASH
+
+    .edidx :
+    {
+        . = ALIGN(4);
+        *(.ARM.exidx*)
+    } > FLASH
+
+    .gnu.sgstubs :
+    {
+        . += 0x400;
+        . = ALIGN(4);
+        *(.gnu.sgstubs*)   /* Secure Gateway stubs */
+        . = ALIGN(4);
+    } >FLASH_NSC
+
+    _stored_data = .;
+    .data : AT (_stored_data)
+    {
+        _start_data = .;
+        KEEP(*(.data*))
+        . = ALIGN(8);
+        KEEP(*(.ramcode))
+        . = ALIGN(8);
+        _end_data = .;
+    } > RAM
+
+    .bss (NOLOAD) :
+    {
+        _start_bss = .;
+        __bss_start__ = .;
+        *(.bss*)
+        *(COMMON)
+        . = ALIGN(8);
+        _end_bss = .;
+        __bss_end__ = .;
+        _end = .;
+    } > RAM
+    . = ALIGN(8);
+}
+
+END_STACK = ORIGIN(RAM) + LENGTH(RAM);
+
+_keyvault_origin = ORIGIN(RAM_KV);
+_keyvault_size = LENGTH(RAM_KV);
+
+_flash_keyvault = ORIGIN(FLASH_KEYVAULT);
+_flash_keyvault_size = LENGTH(FLASH_KEYVAULT);
+
+_start_heap = ORIGIN(RAM_HEAP);
+_heap_size = LENGTH(RAM_HEAP);