#ifndef __LM8_H__
#define __LM8_H__

#include <stddef.h>

// These are universal for all memory models ('int' is always 16-bit)
typedef unsigned char  uint8_t;
typedef   signed char   int8_t;
typedef unsigned short uint16_t;
typedef   signed short  int16_t;
typedef unsigned long  uint32_t;
typedef   signed long   int32_t;

/*
 * Function arguments are always passed directly in
 * r0-r7 for the first 8 bytes - stack there after.
 *
 * Return code are always passed in r0-r3.
 *
 * Small register reservations:
 *    r14  - universal stack pointer
 *    r15  - current frame pointer
 *
 * Medium register reservations:
 *  r8-r9  - universal stack pointer
 * r10-r11 - current frame pointer
 *     r13 - page pointer
 *
 * Large register reservations:
 * r24-r27 - universal stack pointer
 * r28-r31 - current frame pointer
 * r13-r15 - page pointer
 *
 * Both the stack and frame pointers grow downward
 */



static inline uint8_t get_ip(void)
{
	uint8_t value;

	__asm__ volatile ("rcsr %0, ip" : "=r" (value));

	return value;
}

static inline void set_ip (uint8_t value)
{
	__asm__ volatile ("wcsr ip, %0" : : "r" (value));

	return;
}

static inline uint8_t get_im (void)
{
	uint8_t value;

	__asm__ volatile ("rcsr %0, im" : "=r" (value));

	return value;
}

static inline void set_im (uint8_t value)
{
	__asm__ volatile ("wcsr im, %0" : : "r" (value));

	return;
}

#define lm8_interrupt_global_disable() __asm__ volatile ("clri")
#define lm8_interrupt_global_enable()  __asm__ volatile ("seti")





void lm8_interrupt_disable (uint8_t level);
void lm8_interrupt_enable (uint8_t level);

void usleep (uint16_t us);
void msleep (uint16_t ms);






extern void lm8_uart_init (uint8_t idx, size_t base, uint8_t irq);

extern char lm8_uart_getc (uint8_t idx);
extern void lm8_uart_putc (uint8_t idx, char ch);
extern void lm8_uart_isr (uint8_t idx);
extern void simple_putc (char ch);


#endif