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/*
* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "pico/bootrom.h"
#include "boot/picoboot.h"
#include "boot/picobin.h"
/// \tag::table_lookup[]
void *rom_func_lookup(uint32_t code) {
return rom_func_lookup_inline(code);
}
#pragma GCC diagnostic push
// diagnostic: GCC thinks near-zero value is a null pointer member access, but it's not
#pragma GCC diagnostic ignored "-Warray-bounds"
void *rom_data_lookup(uint32_t code) {
#if PICO_RP2040
rom_table_lookup_fn rom_table_lookup = (rom_table_lookup_fn) rom_hword_as_ptr(BOOTROM_TABLE_LOOKUP_OFFSET);
uint16_t *data_table = (uint16_t *) rom_hword_as_ptr(BOOTROM_DATA_TABLE_OFFSET);
return rom_table_lookup(data_table, code);
#else
rom_table_lookup_fn rom_table_lookup = (rom_table_lookup_fn) (uintptr_t)*(uint16_t*)(BOOTROM_TABLE_LOOKUP_OFFSET);
return rom_table_lookup(code, RT_FLAG_DATA);
#endif
}
#pragma GCC diagnostic pop
/// \end::table_lookup[]
bool rom_funcs_lookup(uint32_t *table, unsigned int count) {
bool ok = true;
for (unsigned int i = 0; i < count; i++) {
table[i] = (uintptr_t) rom_func_lookup(table[i]);
if (!table[i]) ok = false;
}
return ok;
}
void __attribute__((noreturn)) rom_reset_usb_boot(uint32_t usb_activity_gpio_pin_mask, uint32_t disable_interface_mask) {
#ifdef ROM_FUNC_RESET_USB_BOOT
rom_reset_usb_boot_fn func = (rom_reset_usb_boot_fn) rom_func_lookup(ROM_FUNC_RESET_USB_BOOT);
func(usb_activity_gpio_pin_mask, disable_interface_mask);
#elif defined(ROM_FUNC_REBOOT)
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();
#else
panic_unsupported();
#endif
}
#if !PICO_RP2040
bool rom_get_boot_random(uint32_t out[4]) {
uint32_t result[5];
rom_get_sys_info_fn func = (rom_get_sys_info_fn) rom_func_lookup_inline(ROM_FUNC_GET_SYS_INFO);
if (5 == func(result, count_of(result), SYS_INFO_BOOT_RANDOM)) {
for(uint i=0;i<4;i++) {
out[i] = result[i+1];
}
return true;
}
return false;
}
int rom_add_flash_runtime_partition(uint32_t start_offset, uint32_t size, uint32_t permissions) {
if ((start_offset) & 4095 || (size & 4095)) return PICO_ERROR_BAD_ALIGNMENT;
if (!size || start_offset + size > 32 * 1024 * 1024) return PICO_ERROR_INVALID_ARG;
if (permissions & ~PICOBIN_PARTITION_PERMISSIONS_BITS) return PICO_ERROR_INVALID_ARG;
void **ptr = (void **)rom_data_lookup(ROM_DATA_PARTITION_TABLE_PTR);
assert(ptr);
assert(*ptr);
struct pt {
struct {
uint8_t partition_count;
uint8_t permission_partition_count; // >= partition_count and includes any regions added at runtime
bool loaded;
};
uint32_t unpartitioned_space_permissions_and_flags;
resident_partition_t partitions[PARTITION_TABLE_MAX_PARTITIONS];
} *pt = (struct pt *)*ptr;
assert(pt->loaded); // even if empty it should have been populated by the bootrom
if (pt->permission_partition_count < pt->partition_count) pt->permission_partition_count = pt->partition_count;
if (pt->permission_partition_count < PARTITION_TABLE_MAX_PARTITIONS) {
pt->partitions[pt->permission_partition_count].permissions_and_location = permissions |
((start_offset / 4096) << PICOBIN_PARTITION_LOCATION_FIRST_SECTOR_LSB) |
((start_offset + size - 4096) / 4096) << PICOBIN_PARTITION_LOCATION_LAST_SECTOR_LSB;
pt->partitions[pt->permission_partition_count].permissions_and_flags = permissions;
return pt->permission_partition_count++;
}
return PICO_ERROR_INSUFFICIENT_RESOURCES;
}
#endif
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