diff options
Diffstat (limited to 'src/machine/machine_rp2350_rom.go')
| -rw-r--r-- | src/machine/machine_rp2350_rom.go | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/src/machine/machine_rp2350_rom.go b/src/machine/machine_rp2350_rom.go new file mode 100644 index 000000000..4f3d4762a --- /dev/null +++ b/src/machine/machine_rp2350_rom.go @@ -0,0 +1,153 @@ +//go:build tinygo && rp2350 + +package machine + +import () + +/* +typedef unsigned char uint8_t; +typedef unsigned short uint16_t; +typedef unsigned long uint32_t; +typedef unsigned long size_t; +typedef unsigned long uintptr_t; + +#define false 0 +#define true 1 +typedef int bool; + +// https://github.com/raspberrypi/pico-sdk +// src/rp2_common/pico_platform_compiler/include/pico/platform/compiler.h + +#define pico_default_asm_volatile(...) __asm volatile (".syntax unified\n" __VA_ARGS__) + + +// https://github.com/raspberrypi/pico-sdk +// src/rp2350/pico_platform/include/pico/platform.h + +static bool pico_processor_state_is_nonsecure(void) { +// // todo add a define to disable NS checking at all? +// // IDAU-Exempt addresses return S=1 when tested in the Secure state, +// // whereas executing a tt in the NonSecure state will always return S=0. +// uint32_t tt; +// pico_default_asm_volatile ( +// "movs %0, #0\n" +// "tt %0, %0\n" +// : "=r" (tt) : : "cc" +// ); +// return !(tt & (1u << 22)); + + return false; +} + + +// https://github.com/raspberrypi/pico-sdk +// src/rp2_common/pico_bootrom/include/pico/bootrom_constants.h + +// RP2040 & RP2350 +#define ROM_DATA_SOFTWARE_GIT_REVISION ROM_TABLE_CODE('G', 'R') +#define ROM_FUNC_FLASH_ENTER_CMD_XIP ROM_TABLE_CODE('C', 'X') +#define ROM_FUNC_FLASH_EXIT_XIP ROM_TABLE_CODE('E', 'X') +#define ROM_FUNC_FLASH_FLUSH_CACHE ROM_TABLE_CODE('F', 'C') +#define ROM_FUNC_CONNECT_INTERNAL_FLASH ROM_TABLE_CODE('I', 'F') +#define ROM_FUNC_FLASH_RANGE_ERASE ROM_TABLE_CODE('R', 'E') +#define ROM_FUNC_FLASH_RANGE_PROGRAM ROM_TABLE_CODE('R', 'P') + +// RP2350 only +#define ROM_FUNC_PICK_AB_PARTITION ROM_TABLE_CODE('A', 'B') +#define ROM_FUNC_CHAIN_IMAGE ROM_TABLE_CODE('C', 'I') +#define ROM_FUNC_EXPLICIT_BUY ROM_TABLE_CODE('E', 'B') +#define ROM_FUNC_FLASH_RUNTIME_TO_STORAGE_ADDR ROM_TABLE_CODE('F', 'A') +#define ROM_DATA_FLASH_DEVINFO16_PTR ROM_TABLE_CODE('F', 'D') +#define ROM_FUNC_FLASH_OP ROM_TABLE_CODE('F', 'O') +#define ROM_FUNC_GET_B_PARTITION ROM_TABLE_CODE('G', 'B') +#define ROM_FUNC_GET_PARTITION_TABLE_INFO ROM_TABLE_CODE('G', 'P') +#define ROM_FUNC_GET_SYS_INFO ROM_TABLE_CODE('G', 'S') +#define ROM_FUNC_GET_UF2_TARGET_PARTITION ROM_TABLE_CODE('G', 'U') +#define ROM_FUNC_LOAD_PARTITION_TABLE ROM_TABLE_CODE('L', 'P') +#define ROM_FUNC_OTP_ACCESS ROM_TABLE_CODE('O', 'A') +#define ROM_DATA_PARTITION_TABLE_PTR ROM_TABLE_CODE('P', 'T') +#define ROM_FUNC_FLASH_RESET_ADDRESS_TRANS ROM_TABLE_CODE('R', 'A') +#define ROM_FUNC_REBOOT ROM_TABLE_CODE('R', 'B') +#define ROM_FUNC_SET_ROM_CALLBACK ROM_TABLE_CODE('R', 'C') +#define ROM_FUNC_SECURE_CALL ROM_TABLE_CODE('S', 'C') +#define ROM_FUNC_SET_NS_API_PERMISSION ROM_TABLE_CODE('S', 'P') +#define ROM_FUNC_BOOTROM_STATE_RESET ROM_TABLE_CODE('S', 'R') +#define ROM_FUNC_SET_BOOTROM_STACK ROM_TABLE_CODE('S', 'S') +#define ROM_DATA_SAVED_XIP_SETUP_FUNC_PTR ROM_TABLE_CODE('X', 'F') +#define ROM_FUNC_FLASH_SELECT_XIP_READ_MODE ROM_TABLE_CODE('X', 'M') +#define ROM_FUNC_VALIDATE_NS_BUFFER ROM_TABLE_CODE('V', 'B') + +#define BOOTSEL_FLAG_GPIO_PIN_SPECIFIED 0x20 + +#define BOOTROM_FUNC_TABLE_OFFSET 0x14 + +// todo remove this (or #ifdef it for A1/A2) +#define BOOTROM_IS_A2() ((*(volatile uint8_t *)0x13) == 2) +#define BOOTROM_WELL_KNOWN_PTR_SIZE (BOOTROM_IS_A2() ? 2 : 4) + +#define BOOTROM_VTABLE_OFFSET 0x00 +#define BOOTROM_TABLE_LOOKUP_OFFSET (BOOTROM_FUNC_TABLE_OFFSET + BOOTROM_WELL_KNOWN_PTR_SIZE) + +// https://github.com/raspberrypi/pico-sdk +// src/common/boot_picoboot_headers/include/boot/picoboot_constants.h + +// values 0-7 are secure/non-secure +#define REBOOT2_FLAG_REBOOT_TYPE_NORMAL 0x0 // param0 = diagnostic partition +#define REBOOT2_FLAG_REBOOT_TYPE_BOOTSEL 0x2 // param0 = bootsel_flags, param1 = gpio_config +#define REBOOT2_FLAG_REBOOT_TYPE_RAM_IMAGE 0x3 // param0 = image_base, param1 = image_end +#define REBOOT2_FLAG_REBOOT_TYPE_FLASH_UPDATE 0x4 // param0 = update_base + +#define REBOOT2_FLAG_NO_RETURN_ON_SUCCESS 0x100 + +#define RT_FLAG_FUNC_ARM_SEC 0x0004 +#define RT_FLAG_FUNC_ARM_NONSEC 0x0010 + +// https://github.com/raspberrypi/pico-sdk +// src/rp2_common/pico_bootrom/include/pico/bootrom.h + +#define ROM_TABLE_CODE(c1, c2) ((c1) | ((c2) << 8)) + +typedef void *(*rom_table_lookup_fn)(uint32_t code, uint32_t mask); + +__attribute__((always_inline)) +static void *rom_func_lookup_inline(uint32_t code) { + rom_table_lookup_fn rom_table_lookup = (rom_table_lookup_fn) (uintptr_t)*(uint16_t*)(BOOTROM_TABLE_LOOKUP_OFFSET); + if (pico_processor_state_is_nonsecure()) { + return rom_table_lookup(code, RT_FLAG_FUNC_ARM_NONSEC); + } else { + return rom_table_lookup(code, RT_FLAG_FUNC_ARM_SEC); + } +} + + +typedef int (*rom_reboot_fn)(uint32_t flags, uint32_t delay_ms, uint32_t p0, uint32_t p1); + +__attribute__((always_inline)) +int rom_reboot(uint32_t flags, uint32_t delay_ms, uint32_t p0, uint32_t p1) { + rom_reboot_fn func = (rom_reboot_fn) rom_func_lookup_inline(ROM_FUNC_REBOOT); + return func(flags, delay_ms, p0, p1); +} + + +// https://github.com/raspberrypi/pico-sdk +// src/rp2_common/pico_bootrom/bootrom.c + + +void reset_usb_boot(uint32_t usb_activity_gpio_pin_mask, uint32_t disable_interface_mask) { + uint32_t flags = disable_interface_mask; + if (usb_activity_gpio_pin_mask) { + flags |= BOOTSEL_FLAG_GPIO_PIN_SPECIFIED; + // the parameter is actually the gpio number, but we only care if BOOTSEL_FLAG_GPIO_PIN_SPECIFIED + usb_activity_gpio_pin_mask = (uint32_t)__builtin_ctz(usb_activity_gpio_pin_mask); + } + rom_reboot(REBOOT2_FLAG_REBOOT_TYPE_BOOTSEL | REBOOT2_FLAG_NO_RETURN_ON_SUCCESS, 10, flags, usb_activity_gpio_pin_mask); + __builtin_unreachable(); +} + + +*/ +import "C" + +func enterBootloader() { + C.reset_usb_boot(0, 0) +} |