int arch_cpu_init(void)
{
configure_clocks();
/*
* Configure the memory protection unit (MPU)
* 0x00000000 - 0xffffffff: Strong-order, Shareable
* 0xC0000000 - 0xC0800000: Normal, Outer and inner Non-cacheable
*/
/* Disable MPU */
writel(0, &V7M_MPU->ctrl);
writel(
0x00000000 /* address */
| 1 << 4 /* VALID */
| 0 << 0 /* REGION */
, &V7M_MPU->rbar
);
/* Strong-order, Shareable */
/* TEX=000, S=1, C=0, B=0*/
writel(
(V7M_MPU_RASR_XN_ENABLE
| V7M_MPU_RASR_AP_RW_RW
| 0x01 << V7M_MPU_RASR_S_SHIFT
| 0x00 << V7M_MPU_RASR_TEX_SHIFT
| V7M_MPU_RASR_SIZE_4GB
| V7M_MPU_RASR_EN)
, &V7M_MPU->rasr
);
writel(
0xC0000000 /* address */
| 1 << 4 /* VALID */
| 1 << 0 /* REGION */
, &V7M_MPU->rbar
);
/* Normal, Outer and inner Non-cacheable */
/* TEX=001, S=0, C=0, B=0*/
writel(
(V7M_MPU_RASR_XN_ENABLE
| V7M_MPU_RASR_AP_RW_RW
| 0x01 << V7M_MPU_RASR_TEX_SHIFT
| V7M_MPU_RASR_SIZE_8MB
| V7M_MPU_RASR_EN)
, &V7M_MPU->rasr
);
/* Enable MPU */
writel(V7M_MPU_CTRL_ENABLE | V7M_MPU_CTRL_HFNMIENA, &V7M_MPU->ctrl);
return 0;
}
static void bootloader_flash_init(void)
{
g_bootloaderContext.flashDriverInterface->flash_init(&g_bootloaderContext.flashState);
#if BL_TARGET_FLASH
//! @brief A static buffer used to hold flash_run_command()
static uint32_t s_flashRunCommand[kFLASH_ExecuteInRamFunctionMaxSizeInWords];
//! @brief A static buffer used to hold flash_cache_clear_command()
static uint32_t s_flashCacheClearCommand[kFLASH_ExecuteInRamFunctionMaxSizeInWords];
static flash_execute_in_ram_function_config_t s_flashExecuteInRamFunctionInfo = {
.activeFunctionCount = 0,
.flashRunCommand = s_flashRunCommand,
.flashCacheClearCommand = s_flashCacheClearCommand,
};
g_bootloaderContext.flashState.flashExecuteInRamFunctionInfo = &s_flashExecuteInRamFunctionInfo.activeFunctionCount;
g_bootloaderContext.flashDriverInterface->flash_prepare_execute_in_ram_functions(&g_bootloaderContext.flashState);
#endif
}
//! @brief Initialize the bootloader and peripherals.
//!
//! This function initializes hardware and clocks, loads user configuration data, and initialzes
//! a number of drivers. It then enters the active peripheral detection phase by calling
//! get_active_peripheral(). Once the peripheral is detected, the packet and comand interfaces
//! are initialized.
//!
//! Note that this routine may not return if peripheral detection times out and the bootloader
//! jumps directly to the user application in flash.
static void bootloader_init(void)
{
// Init the global irq lock
lock_init();
// Init pinmux and other hardware setup.
init_hardware();
// Init flash driver.
bootloader_flash_init();
// Load the user configuration data so that we can configure the clocks
g_bootloaderContext.propertyInterface->load_user_config();
// Init QSPI module if needed
#if BL_FEATURE_QSPI_MODULE
configure_quadspi_as_needed();
#endif // BL_FEATURE_QSPI_MODULE
// Configure clocks.
configure_clocks(kClockOption_EnterBootloader);
// Start the lifetime counter
microseconds_init();
#if BL_FEATURE_BYPASS_WATCHDOG
g_bootloaderContext.flashDriverInterface->flash_register_callback(&g_bootloaderContext.flashState,
bootloader_watchdog_service);
bootloader_watchdog_init();
#endif // BL_FEATURE_BYPASS_WATCHDOG
// Init address range of flash array, SRAM_L and SRAM U.
g_bootloaderContext.memoryInterface->init();
// Fully init the property store.
g_bootloaderContext.propertyInterface->init();
#if BL_FEATURE_RELIABLE_UPDATE
bootloader_reliable_update_as_requested(kReliableUpdateOption_Normal, 0);
#endif // BL_FEATURE_RELIABLE_UPDATE
// Message so python instantiated debugger can tell the
// bootloader application is running on the target.
debug_printf("\r\n\r\nRunning bootloader...\r\n");
#if DEBUG && !DEBUG_PRINT_DISABLE
standard_version_t version = g_bootloaderContext.propertyInterface->store->bootloaderVersion;
debug_printf("Bootloader version %c%d.%d.%d\r\n", version.name, version.major, version.minor, version.bugfix);
#endif
// Wait for a peripheral to become active.
g_bootloaderContext.activePeripheral = get_active_peripheral();
assert(g_bootloaderContext.activePeripheral);
// Validate required active peripheral interfaces.
assert(g_bootloaderContext.activePeripheral->controlInterface);
// Init the active peripheral.
if (g_bootloaderContext.activePeripheral->byteInterface &&
g_bootloaderContext.activePeripheral->byteInterface->init)
{
g_bootloaderContext.activePeripheral->byteInterface->init(g_bootloaderContext.activePeripheral);
}
if (g_bootloaderContext.activePeripheral->packetInterface &&
g_bootloaderContext.activePeripheral->packetInterface->init)
{
g_bootloaderContext.activePeripheral->packetInterface->init(g_bootloaderContext.activePeripheral);
}
// Initialize the command processor component.
g_bootloaderContext.commandInterface->init();
}
// See bl_shutdown_cleanup.h for documentation of this function.
void shutdown_cleanup(shutdown_type_t shutdown)
{
#if !defined(BOOTLOADER_HOST)
if (shutdown != kShutdownType_Reset)
{
// Clear (flush) the flash cache.
flash_cache_clear(NULL);
}
if (shutdown != kShutdownType_Cleanup)
{
// Shutdown all peripherals because they could be active
uint32_t i;
for (i = 0; g_peripherals[i].typeMask != 0; i++)
{
if (g_peripherals[i].controlInterface->shutdown)
{
g_peripherals[i].controlInterface->shutdown(&g_peripherals[i]);
}
}
}
// If we are permanently exiting the bootloader, there are a few extra things to do.
if (shutdown == kShutdownType_Shutdown)
{
// Turn off global interrupt
lock_acquire();
// Shutdown microseconds driver.
microseconds_shutdown();
#if defined(RCM_FM)
// Disable force ROM.
RCM_BWR_FM_FORCEROM(RCM, 0);
// Clear status register (bits are w1c).
RCM_BWR_MR_BOOTROM(RCM, 3);
#endif // defined(RCM_FM)
init_interrupts();
// Set the VTOR to default.
SCB->VTOR = kDefaultVectorTableAddress;
// Restore clock to default before leaving bootloader.
configure_clocks(kClockOption_ExitBootloader);
// De-initialize hardware such as disabling port clock gate
deinit_hardware();
// Restore global interrupt.
__enable_irq();
#if BL_FEATURE_BYPASS_WATCHDOG
// De-initialize watchdog
bootloader_watchdog_deinit();
#endif // BL_FEATURE_BYPASS_WATCHDOG
}
// Memory barriers for good measure.
__ISB();
__DSB();
#endif
}
