littleboot.h

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#ifndef __LITTLE_BOOT_H__
#define __LITTLE_BOOT_H__
 
/*for now, I only have QEMU */
#define RASPBERRY_PI 1
 
 typedef unsigned long long uint64_t;
 typedef unsigned long long uintptr_t;
 typedef unsigned char uint8_t;
 typedef unsigned short uint16_t;
 typedef unsigned int uint32_t;
 typedef uint64_t size_t;
 
 #define true 1
 #define false 0
 #define bool char
 
 #define NULL 0
 
#ifdef QEMU
#define UART_BASE 0x09000000
#elif RASPBERRY_PI
#define MMIO_BASE 0x3F000000
#define UART_BASE (0x3F000000 + 0x201000)
#define UART0_DR ((volatile uint32_t*)(UART_BASE + 0x00))
#define UART0_FR ((volatile uint32_t*)(UART_BASE + 0x18))
#define UART0_IBRD ((volatile uint32_t*)(UART_BASE + 0x24))
#define UART0_FBRD ((volatile uint32_t*)(UART_BASE + 0x28))
#define UART0_LCRH ((volatile uint32_t*)(UART_BASE + 0x2C))
#define UART0_CR  ((volatile uint32_t*)(UART_BASE + 0x30))
#define UART0_IMSC ((volatile uint32_t*)(UART_BASE + 0x38))
#define UART0_ICR ((volatile uint32_t*)(UART_BASE + 0x44))
#endif
 
#define UARTFR (UART_BASE + 0x18)
#define UARTDR (UART_BASE + 0x00)
 
typedef struct {
    uint32_t magic;
    uint32_t totalSize;
    uint32_t off_dt_struct;
    uint32_t off_dt_strings;
    uint32_t off_mem_rsvmap;
    uint32_t version;
    uint32_t last_comp_version;
    uint32_t boot_cpuid_phys;
    uint32_t size_dt_strings;
    uint32_t size_dt_struct;
}fdt_header_t;
 
#define MAX_MEMORY_REGN 8
 
typedef struct {
    uint64_t base;
    uint64_t size;
    uint64_t page_count;
}memory_region_t;
 
#define RAW_OFFSET(type, x, offset) (type)((size_t)x + offset)
 
/*
 * LBUartPutc -- put a character to UART
 * @param c -- Character to put
 */
extern void LBUartPutc(char c);
 
 
/*
 * LBUartPutString -- print a string 
 * to UART
 * @param s -- String to print
 */
extern void LBUartPutString(const char* s);
 
/*
 * LBUartPrintHex -- prints hexadecimal value
 * using serial UART
 * @param val -- value to print
 */
extern void LBUartPrintHex(uint64_t val);
 
/*
 * LBUartPrintInt -- prints integer 
 * through UART
 * @param value -- value to print
 */
extern void LBUartPrintInt(uint64_t value);
 
 
/*
 * LBExceptionSetup -- install exception handlers
 */
extern void LBExceptionSetup();
 
 
#endif