Commit 82fe3c86 authored by a1ex's avatar a1ex
Browse files

Added missing boot-hack.c

--HG--
branch : unified
parent f474d27676af
/** \file
* Code to run on the 5D once it has been relocated.
*
* This has been updated to work with the 2.0.3 firmware.
* IT DOES NOT WORK WITH 1.1.0 NOR 1.0.7 ANY MORE!
*/
/*
* Copyright (C) 2009 Trammell Hudson <hudson+ml@osresearch.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "dryos.h"
#include "config.h"
#include "version.h"
#include "bmp.h"
#include "menu.h"
#include "version.h"
#include "property.h"
#include "consts.h"
/** If CONFIG_EARLY_PORT is defined, only a few things will be enabled */
#undef CONFIG_EARLY_PORT
/** These are called when new tasks are created */
void my_task_dispatch_hook( struct context ** );
void my_init_task(void);
void my_bzero( uint8_t * base, uint32_t size );
/** This just goes into the bss */
#define RELOCSIZE 0x10000
static uint8_t _reloc[ RELOCSIZE ];
#define RELOCADDR ((uintptr_t) _reloc)
/** Translate a firmware address into a relocated address */
#define INSTR( addr ) ( *(uint32_t*)( (addr) - ROMBASEADDR + RELOCADDR ) )
/** Fix a branch instruction in the relocated firmware image */
#define FIXUP_BRANCH( rom_addr, dest_addr ) \
INSTR( rom_addr ) = BL_INSTR( &INSTR( rom_addr ), (dest_addr) )
/** Was this an autoboot or firmware file load? */
int autoboot_loaded;
/** Specified by the linker */
extern uint32_t _bss_start[], _bss_end[];
static inline void
zero_bss( void )
{
uint32_t *bss = _bss_start;
while( bss < _bss_end )
*(bss++) = 0;
}
void
__attribute__((noreturn,noinline,naked))
copy_and_restart( int offset )
{
zero_bss();
// Set the flag if this was an autoboot load
autoboot_loaded = (offset == 0);
// Copy the firmware to somewhere safe in memory
const uint8_t * const firmware_start = (void*) ROMBASEADDR;
const uint32_t firmware_len = RELOCSIZE;
uint32_t * const new_image = (void*) RELOCADDR;
blob_memcpy( new_image, firmware_start, firmware_start + firmware_len );
/*
* in entry2() (0xff010134) make this change to
* return to our code before calling cstart().
* This should be a "BL cstart" instruction.
*/
INSTR( HIJACK_INSTR_BL_CSTART ) = RET_INSTR;
/*
* in cstart() (0xff010ff4) make these changes:
* calls bzero(), then loads bs_end and calls
* create_init_task
*/
// Reserve memory after the BSS for our application
INSTR( HIJACK_INSTR_BSS_END ) = (uintptr_t) _bss_end;
// Fix the calls to bzero32() and create_init_task()
FIXUP_BRANCH( HIJACK_FIXBR_BZERO32, bzero32 );
FIXUP_BRANCH( HIJACK_FIXBR_CREATE_ITASK, create_init_task );
// Set our init task to run instead of the firmware one
INSTR( HIJACK_INSTR_MY_ITASK ) = (uint32_t) my_init_task;
// Make sure that our self-modifying code clears the cache
clean_d_cache();
flush_caches();
// We enter after the signature, avoiding the
// relocation jump that is at the head of the data
thunk reloc_entry = (thunk)( RELOCADDR + 0xC );
reloc_entry();
/*
* We're back!
* The RAM copy of the firmware startup has:
* 1. Poked the DMA engine with what ever it does
* 2. Copied the rw_data segment to 0x1900 through 0x20740
* 3. Zeroed the BSS from 0x20740 through 0x47550
* 4. Copied the interrupt handlers to 0x0
* 5. Copied irq 4 to 0x480.
* 6. Installed the stack pointers for CPSR mode D2 and D3
* (we are still in D3, with a %sp of 0x1000)
* 7. Returned to us.
*
* Now is our chance to fix any data segment things, or
* install our own handlers.
*/
#ifndef CONFIG_EARLY_PORT
// Install our task creation hooks
task_dispatch_hook = my_task_dispatch_hook;
#endif
// This will jump into the RAM version of the firmware,
// but the last branch instruction at the end of this
// has been modified to jump into the ROM version
// instead.
void (*ram_cstart)(void) = (void*) &INSTR( cstart );
ram_cstart();
// Unreachable
while(1)
;
}
#ifndef CONFIG_EARLY_PORT
void
null_task( void )
{
DebugMsg( DM_SYS, 3, "%s created (and exiting)", __func__ );
return;
}
/**
* Called by DryOS when it is dispatching (or creating?)
* a new task.
*/
void
my_task_dispatch_hook(
struct context ** context
)
{
if( !context )
return;
// Do nothing unless a new task is starting via the trampoile
if( (*context)->pc != (uint32_t) task_trampoline )
return;
// Determine the task address
struct task * const task = *(struct task**) HIJACK_TASK_ADDR;
thunk entry = (thunk) task->entry;
// Search the task_mappings array for a matching entry point
extern struct task_mapping _task_overrides_start[];
extern struct task_mapping _task_overrides_end[];
const struct task_mapping * mapping = _task_overrides_start;
for( ; mapping < _task_overrides_end ; mapping++ )
{
thunk original_entry = mapping->orig;
if( original_entry != entry )
continue;
/* -- can't call debugmsg from this context */
#if 0
DebugMsg( DM_SYS, 3, "***** Replacing task %x with %x",
original_entry,
mapping->replacement
);
#endif
task->entry = mapping->replacement;
break;
}
}
/** First task after a fresh rebuild.
*
* Try to dump the debug log after ten seconds.
* This requires the create_task(), dmstart(), msleep() and dumpf()
* routines to have been found.
*/
void
my_dump_task( void )
{
dmstart();
msleep( 10000 );
dispcheck();
dumpf();
dmstop();
}
struct config * global_config;
static volatile int init_funcs_done;
static void
call_init_funcs( void * priv )
{
// Call all of the init functions
extern struct task_create _init_funcs_start[];
extern struct task_create _init_funcs_end[];
struct task_create * init_func = _init_funcs_start;
for( ; init_func < _init_funcs_end ; init_func++ )
{
DebugMsg( DM_MAGIC, 3,
"Calling init_func %s (%x)",
init_func->name,
(unsigned) init_func->entry
);
thunk entry = (thunk) init_func->entry;
entry();
}
}
#endif // !CONFIG_EARLY_PORT
static void nop( void ) { }
void menu_init( void ) __attribute__((weak,alias("nop")));
void debug_init( void ) __attribute__((weak,alias("nop")));
int magic_off = 0;
int magic_is_off()
{
return magic_off;
}
int _hold_your_horses = 1;
// only after this task finished, the others are started
void init_task_read_config()
{
show_logo();
display_clock();
config_parse_file( "B:/magic.cfg" );
debug_init_stuff();
_hold_your_horses = 0;
}
void hold_your_horses(int showlogo)
{
while (_hold_your_horses)
{
msleep( 500 );
}
}
/** Initial task setup.
*
* This is called instead of the task at 0xFF811DBC.
* It does all of the stuff to bring up the debug manager,
* the terminal drivers, stdio, stdlib and armlib.
*/
void
my_init_task(void)
{
// Call their init task
init_task();
#ifndef CONFIG_EARLY_PORT
// Overwrite the PTPCOM message
dm_names[ DM_MAGIC ] = "[MAGIC] ";
//~ dmstart(); // already called by firmware?
DebugMsg( DM_MAGIC, 3, "Magic Lantern %s (%s)",
build_version,
build_id
);
DebugMsg( DM_MAGIC, 3, "Built on %s by %s",
build_date,
build_user
);
#endif
// Re-write the version string.
// Don't use strcpy() so that this can be done
// before strcpy() or memcpy() are located.
extern char additional_version[];
additional_version[0] = '-';
additional_version[1] = 'm';
additional_version[2] = 'l';
additional_version[3] = '-';
additional_version[4] = build_version[0];
additional_version[5] = build_version[1];
additional_version[6] = build_version[2];
additional_version[7] = build_version[3];
additional_version[8] = build_version[4];
additional_version[9] = build_version[5];
additional_version[10] = build_version[6];
additional_version[11] = build_version[7];
additional_version[12] = build_version[8];
additional_version[13] = '\0';
#ifndef CONFIG_EARLY_PORT
msleep( 1500 );
magic_off = FOCUS_CONFIRMATION_AF_PRESSED ? 1 : 0;
if (magic_off)
{
bmp_printf(FONT_LARGE, 0, 0, "Magic OFF");
additional_version[0] = '-';
additional_version[1] = 'm';
additional_version[2] = 'l';
additional_version[3] = '-';
additional_version[4] = 'o';
additional_version[5] = 'f';
additional_version[6] = 'f';
additional_version[7] = '\0';
return;
}
BMP_SEM ( // block redraw events
msleep( 1000 );
menu_init();
debug_init();
call_init_funcs( 0 );
/* bmp_printf( FONT_MED, 0, 40,
"Magic Lantern v.%s (%s)\n"
"Built on %s by %s\n",
build_version,
build_id,
build_date,
build_user
);*/
// this is better in a separate task (not sure why, but causes instability if called right from here)
// let's try not to open files from here
task_create("config_init", 0x1e, 0x1000, init_task_read_config, 0 );
hold_your_horses(0);
// Create all of our auto-create tasks
extern struct task_create _tasks_start[];
extern struct task_create _tasks_end[];
struct task_create * task = _tasks_start;
int ml_tasks = 0;
for( ; task < _tasks_end ; task++ )
{
//~ DebugMsg( DM_MAGIC, 3,
//~ "Creating task %s(%d) pri=%02x flags=%08x",
//~ task->name,
//~ task->arg,
//~ task->priority,
//~ task->flags
//~ );
task_create(
task->name,
task->priority,
task->flags,
task->entry,
task->arg
);
ml_tasks++;
}
//~ bmp_printf( FONT_MED, 0, 85,
//~ "Magic Lantern is up and running... %d tasks started.",
//~ ml_tasks
//~ );
msleep(500);
) // end BMP_SEM
redraw();
//~ DebugMsg( DM_MAGIC, 3, "magic lantern init done" );
#endif // !CONFIG_EARLY_PORT
}
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