littleboot.c File Reference

#include "littleboot.h"
#include "dtb.h"
#include "physm.h"
#include "vmmngr.h"
#include "ramdisk.h"
#include "aurora.h"
#include "gpio.h"

Include dependency graph for littleboot.c:

Macros
#define	MBOX_REQUEST   0
#define	MBOX_CH_POWER   0
#define	MBOX_CH_FB   1
#define	MBOX_CH_VUART   2
#define	MBOX_CH_VCHIQ   3
#define	MBOX_CH_LEDS   4
#define	MBOX_CH_BTNS   5
#define	MBOX_CH_TOUCH   6
#define	MBOX_CH_COUNT   7
#define	MBOX_CH_PROP   8
#define	MBOX_TAG_GETSERIAL   0x1004
#define	MBOX_TAG_SETCLKRATE   0x38002
#define	MBOX_TAG_LAST   0
#define	VIDEOCORE_MBOX   (MMIO_BASE+0x0000B880)
#define	MBOX_READ   ((volatile unsigned int*)(VIDEOCORE_MBOX+0x0))
#define	MBOX_POLL   ((volatile unsigned int*)(VIDEOCORE_MBOX+0x10))
#define	MBOX_SENDER   ((volatile unsigned int*)(VIDEOCORE_MBOX+0x14))
#define	MBOX_STATUS   ((volatile unsigned int*)(VIDEOCORE_MBOX+0x18))
#define	MBOX_CONFIG   ((volatile unsigned int*)(VIDEOCORE_MBOX+0x1C))
#define	MBOX_WRITE   ((volatile unsigned int*)(VIDEOCORE_MBOX+0x20))
#define	MBOX_RESPONSE   0x80000000
#define	MBOX_FULL   0x80000000
#define	MBOX_EMPTY   0x40000000

Functions
volatile unsigned int	__attribute__ ((aligned(16)))
void	LBUartInit ()
void	LBUartPutc (char c)
void	LBUartPutString (const char *s)
void	LBUartPrintHex (uint64_t val)
void	LBUartPrintInt (uint64_t value)
void	subtract_resv (uint64_t start, uint64_t end, uint64_t resvstart, uint64_t resvend)
void	LBSubtractRegion (uint64_t mem_base, uint64_t mem_end, uint64_t regionStart, uint64_t regionEnd)
void	LBInitializeMemoryMap (uint64_t dtb)
void	LBExitEL2 ()
void	LittleBootMain (uint64_t dtb)

Variables
memory_region_t	usable_regions [MAX_MEMORY_REGN]
int	usable_region_count = 0
uint64_t	nextStart
char	phys []
char	end []
uint64_t	nextIterationStart
uint64_t	pmmngrdata [1024 *1024]
uint64_t	mem_base
uint64_t	mem_end
uint64_t	mem_size

Macro Definition Documentation

MBOX_CH_BTNS

#define MBOX_CH_BTNS   5

MBOX_CH_COUNT

#define MBOX_CH_COUNT   7

MBOX_CH_FB

#define MBOX_CH_FB   1

MBOX_CH_LEDS

#define MBOX_CH_LEDS   4

MBOX_CH_POWER

#define MBOX_CH_POWER   0

MBOX_CH_PROP

#define MBOX_CH_PROP   8

MBOX_CH_TOUCH

#define MBOX_CH_TOUCH   6

MBOX_CH_VCHIQ

#define MBOX_CH_VCHIQ   3

MBOX_CH_VUART

#define MBOX_CH_VUART   2

MBOX_CONFIG

#define MBOX_CONFIG   ((volatile unsigned int*)(VIDEOCORE_MBOX+0x1C))

MBOX_EMPTY

#define MBOX_EMPTY   0x40000000

MBOX_FULL

#define MBOX_FULL   0x80000000

MBOX_POLL

#define MBOX_POLL   ((volatile unsigned int*)(VIDEOCORE_MBOX+0x10))

MBOX_READ

#define MBOX_READ   ((volatile unsigned int*)(VIDEOCORE_MBOX+0x0))

MBOX_REQUEST

#define MBOX_REQUEST   0

BSD 2-Clause License

Copyright (c) 2022-2025, Manas Kamal Choudhury All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

MBOX_RESPONSE

#define MBOX_RESPONSE   0x80000000

MBOX_SENDER

#define MBOX_SENDER   ((volatile unsigned int*)(VIDEOCORE_MBOX+0x14))

MBOX_STATUS

#define MBOX_STATUS   ((volatile unsigned int*)(VIDEOCORE_MBOX+0x18))

MBOX_TAG_GETSERIAL

#define MBOX_TAG_GETSERIAL   0x1004

MBOX_TAG_LAST

#define MBOX_TAG_LAST   0

MBOX_TAG_SETCLKRATE

#define MBOX_TAG_SETCLKRATE   0x38002

MBOX_WRITE

#define MBOX_WRITE   ((volatile unsigned int*)(VIDEOCORE_MBOX+0x20))

VIDEOCORE_MBOX

#define VIDEOCORE_MBOX   (MMIO_BASE+0x0000B880)

Function Documentation

__attribute__()

volatile unsigned int __attribute__

(

(aligned(16))

)

Make a mailbox call. Returns 0 on failure, non-zero on success

LBExitEL2()

void LBExitEL2

(

)

LBInitializeMemoryMap()

void LBInitializeMemoryMap

(

uint64_t

dtb

)

LBSubtractRegion()

void LBSubtractRegion	(	uint64_t	mem_base,
		uint64_t	mem_end,
		uint64_t	regionStart,
		uint64_t	regionEnd
	)

LBUartInit()

void LBUartInit

(

)

LBUartPrintHex()

void LBUartPrintHex

(

uint64_t

val

)

LBUartPrintInt()

void LBUartPrintInt

(

uint64_t

value

)

LBUartPutc()

void LBUartPutc

(

char

c

)

LBUartPutString()

void LBUartPutString

(

const char *

s

)

LittleBootMain()

void LittleBootMain

(

uint64_t

dtb

)

subtract_resv()

void subtract_resv	(	uint64_t	start,
		uint64_t	end,
		uint64_t	resvstart,
		uint64_t	resvend
	)

Variable Documentation

end

char end[]

extern

mem_base

uint64_t mem_base

mem_end

uint64_t mem_end

mem_size

uint64_t mem_size

nextIterationStart

uint64_t nextIterationStart

nextStart

uint64_t nextStart

phys

char phys[]

extern

pmmngrdata

uint64_t pmmngrdata[1024 *1024]

usable_region_count

int usable_region_count = 0

usable_regions

memory_region_t usable_regions[MAX_MEMORY_REGN]