mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-09-21 00:26:12 +00:00
119 lines
3.2 KiB
C++
119 lines
3.2 KiB
C++
/*
|
|
* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
|
|
*
|
|
* This file is part of PortaPack.
|
|
*
|
|
* 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, 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; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, Inc., 51 Franklin Street,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include "core_control.hpp"
|
|
|
|
#include "hal.h"
|
|
|
|
#include "lpc43xx_cpp.hpp"
|
|
using namespace lpc43xx;
|
|
|
|
#include "message.hpp"
|
|
#include "baseband_api.hpp"
|
|
#include "portapack_shared_memory.hpp"
|
|
|
|
#include <cstring>
|
|
|
|
char * modhash;
|
|
|
|
/* TODO: OK, this is cool, but how do I put the M4 to sleep so I can switch to
|
|
* a different image? Other than asking the old image to sleep while the M0
|
|
* makes changes?
|
|
*
|
|
* I suppose I could force M4MEMMAP to an invalid memory reason which would
|
|
* cause an exception and effectively halt the M4. But that feels gross.
|
|
*/
|
|
void m4_init(const portapack::spi_flash::region_t from, const portapack::memory::region_t to) {
|
|
/* Initialize M4 code RAM */
|
|
std::memcpy(reinterpret_cast<void*>(to.base()), from.base(), from.size);
|
|
|
|
/* M4 core is assumed to be sleeping with interrupts off, so we can mess
|
|
* with its address space and RAM without concern.
|
|
*/
|
|
LPC_CREG->M4MEMMAP = to.base();
|
|
|
|
/* Reset M4 core */
|
|
LPC_RGU->RESET_CTRL[0] = (1 << 13);
|
|
}
|
|
|
|
void m4_request_shutdown() {
|
|
baseband::shutdown();
|
|
}
|
|
|
|
void m0_halt() {
|
|
rgu::reset(rgu::Reset::M0APP);
|
|
while(true) {
|
|
port_wait_for_interrupt();
|
|
}
|
|
}
|
|
|
|
int m4_load_image(void) {
|
|
uint32_t mod_size;
|
|
UINT bw;
|
|
uint8_t i;
|
|
char md5sum[16];
|
|
FILINFO modinfo;
|
|
FIL modfile;
|
|
DIR rootdir;
|
|
FRESULT res;
|
|
|
|
// Scan SD card root directory for files with the right md5 fingerprint at the right location
|
|
f_opendir(&rootdir, "/");
|
|
for (;;) {
|
|
res = f_readdir(&rootdir, &modinfo);
|
|
if (res != FR_OK || modinfo.fname[0] == 0) break;
|
|
if (!(modinfo.fattrib & AM_DIR)) {
|
|
f_open(&modfile, modinfo.fname, FA_OPEN_EXISTING | FA_READ);
|
|
f_lseek(&modfile, 26);
|
|
f_read(&modfile, &md5sum, 16, &bw);
|
|
for (i = 0; i < 16; i++) {
|
|
if (md5sum[i] != modhash[i]) break;
|
|
}
|
|
if (i == 16) {
|
|
f_lseek(&modfile, 6);
|
|
f_read(&modfile, &mod_size, 4, &bw);
|
|
f_lseek(&modfile, 256);
|
|
f_read(&modfile, reinterpret_cast<void*>(portapack::memory::map::m4_code.base()), mod_size, &bw);
|
|
LPC_RGU->RESET_CTRL[0] = (1 << 13);
|
|
f_close(&modfile);
|
|
return 1;
|
|
}
|
|
f_close(&modfile);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void m4_switch(const char * hash) {
|
|
modhash = const_cast<char*>(hash);
|
|
|
|
// Ask M4 to enter loop in RAM
|
|
BasebandConfiguration baseband_switch {
|
|
.mode = 0xFF,
|
|
.sampling_rate = 0,
|
|
.decimation_factor = 1,
|
|
};
|
|
|
|
BasebandConfigurationMessage message { baseband_switch };
|
|
shared_memory.baseband_queue.push(message);
|
|
}
|