exception.c File Reference

#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <types.h>
#include <mmu.h>
#include <timer.h>
#include <log.h>

Include dependency graph for exception.c:

Functions
void	abort ()
static void	show_regs (struct arm_regs_t *regs)
void	__attribute__ ((weak))
	Pre-initialize system clocks.

Function Documentation

__attribute__()

int __attribute__

(

(weak)

)

Pre-initialize system clocks.

Check if a character is available to read from the UART.

Read a character from the UART.

Initialize DRAM controller and memory.

Set CPU PLL frequency.

Get peripheral 1x clock rate.

Initialize USB clocks.

Deinitialize USB clocks.

Dump clock information.

Reset system clocks.

Get high-speed oscillator type.

This weak function performs preliminary clock initialization before the main clock initialization. Platform-specific implementations should override this function.

This weak function returns the type/frequency of the high-speed oscillator (HOSC). The default implementation returns 24 MHz.

Returns

High-speed oscillator frequency in MHz

This weak function resets system clocks to their default state. Platform-specific implementations should override this function.

This weak function dumps information about the current clock configuration for debugging purposes. Platform-specific implementations should override this function.

This weak function deinitializes clocks for USB controllers. Platform-specific implementations should override this function.

This weak function initializes clocks for USB controllers. Platform-specific implementations should override this function.

This weak function returns the frequency of the peripheral 1x clock. The default implementation returns 0.

Returns

Peripheral 1x clock frequency in Hz

This weak function configures the CPU PLL to the specified frequency. Platform-specific implementations should override this function.

Parameters

freq	Target frequency in Hz

This weak function initializes the DRAM controller and configures memory settings. Platform-specific implementations should override this function to perform SoC-specific DRAM initialization including timing configuration, voltage setup, and memory training.

Parameters

para	Pointer to initialization parameters. The exact structure depends on the platform implementation.

Returns

0 on success, non-zero error code on failure. Default implementation returns 0.

This function reads a single character from the UART receive buffer. It waits until data is available before reading.

Parameters

[in]

arg

Pointer to the UART structure (cast to void* for compatibility)

Returns

The received character

This function checks the UART line status register to determine if there is data available in the receive buffer.

Parameters

[in]

arg

Pointer to the UART structure (cast to void* for compatibility)

Returns

Non-zero value if data is available, zero otherwise

abort()

void abort ( )

extern

show_regs()

static void show_regs ( struct arm_regs_t *  regs )

static