rpi4-osdev/part15-tcpip/kernel/kernel.h

#define PERIPHERAL_BASE 0xFE000000
#define CLOCKHZ 1000000

struct timer_regs {
    volatile unsigned int control_status;
    volatile unsigned int counter_lo;
    volatile unsigned int counter_hi;
    volatile unsigned int compare[4];
};

#define REGS_TIMER ((struct timer_regs *)(PERIPHERAL_BASE + 0x00003000))

struct arm_irq_regs_2711 {
    volatile unsigned int irq0_pending_0;
    volatile unsigned int irq0_pending_1;
    volatile unsigned int irq0_pending_2;
    volatile unsigned int res0;
    volatile unsigned int irq0_enable_0;
    volatile unsigned int irq0_enable_1;
    volatile unsigned int irq0_enable_2;
    volatile unsigned int res1;
    volatile unsigned int irq0_disable_0;
    volatile unsigned int irq0_disable_1;
    volatile unsigned int irq0_disable_2;
};

typedef struct arm_irq_regs_2711 arm_irq_regs;

#define REGS_IRQ ((arm_irq_regs *)(PERIPHERAL_BASE + 0x0000B200))

enum vc_irqs {
    SYS_TIMER_IRQ_0 = 1,
    SYS_TIMER_IRQ_1 = 2,
    SYS_TIMER_IRQ_2 = 4,
    SYS_TIMER_IRQ_3 = 8,
    AUX_IRQ = (1 << 29)
};

void irq_init_vectors();
void irq_enable();
void irq_disable();
void enable_interrupt_controller();
void disable_interrupt_controller();

void handle_timer_1();
void handle_timer_3();

void init_network(void);
void net_test(void);
void enc28j60PacketSend(unsigned short buflen, void *buffer);
void *memcpy(void *dest, const void *src, unsigned short len);