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/*
* This file is part of the flashprog project.
*
* Copyright (C) 2014 Stefan Tauner
*
* 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.
*/
#include <stddef.h>
#include <stdint.h>
#include "flash.h"
#include "programmer.h"
#include "chipdrivers.h"
static void *programmer_map_flash_region(const struct flashctx *flash, const char *descr,
uintptr_t phys_addr, size_t len)
{
void *ret;
if (flash->mst.par->map_flash)
ret = flash->mst.par->map_flash(descr, phys_addr, len);
else
ret = fallback_map(descr, phys_addr, len);
msg_gspew("%s: mapping %s from 0x%0*" PRIxPTR " to 0x%0*" PRIxPTR "\n",
__func__, descr, PRIxPTR_WIDTH, phys_addr, PRIxPTR_WIDTH, (uintptr_t) ret);
return ret;
}
static void programmer_unmap_flash_region(const struct flashctx *flash, void *virt_addr, size_t len)
{
if (flash->mst.par->unmap_flash)
flash->mst.par->unmap_flash(virt_addr, len);
else
fallback_unmap(virt_addr, len);
msg_gspew("%s: unmapped 0x%0*" PRIxPTR "\n", __func__, PRIxPTR_WIDTH, (uintptr_t)virt_addr);
}
int prepare_memory_access(struct flashctx *flash, enum preparation_steps prep)
{
/* Init pointers to the fail-safe state to distinguish them later from legit values. */
flash->virtual_memory = (chipaddr)ERROR_PTR;
flash->virtual_registers = (chipaddr)ERROR_PTR;
const chipsize_t size = flash->chip->total_size * 1024;
const uintptr_t base = flashbase ? flashbase : (0xffffffff - size + 1);
void *const addr = programmer_map_flash_region(flash, flash->chip->name, base, size);
if (addr == ERROR_PTR) {
msg_perr("Could not map flash chip %s at 0x%0*" PRIxPTR ".\n",
flash->chip->name, PRIxPTR_WIDTH, base);
return 1;
}
flash->physical_memory = base;
flash->virtual_memory = (chipaddr)addr;
return 0;
}
int prepare_memory_register_access(struct flashctx *flash, enum preparation_steps prep)
{
if (prepare_memory_access(flash, prep))
return 1;
/*
* FIXME: Special function registers normally live 4 MByte below flash space,
* but it might be somewhere completely different on some chips and programmers,
* or not mappable at all. Ignore these problems for now and always report success.
*/
const chipsize_t size = flash->chip->total_size * 1024;
const uintptr_t base = 0xffffffff - size - 0x400000 + 1;
void *const addr = programmer_map_flash_region(flash, "flash chip registers", base, size);
if (addr == ERROR_PTR) {
msg_pdbg2("Could not map flash chip registers %s at 0x%0*" PRIxPTR ".\n",
flash->chip->name, PRIxPTR_WIDTH, base);
return 0;
}
flash->physical_registers = base;
flash->virtual_registers = (chipaddr)addr;
return 0;
}
void finish_memory_access(struct flashctx *flash)
{
const size_t size = flashprog_flash_getsize(flash);
if (flash->virtual_registers != (chipaddr)ERROR_PTR) {
programmer_unmap_flash_region(flash, (void *)flash->virtual_registers, size);
flash->physical_registers = 0;
flash->virtual_registers = (chipaddr)ERROR_PTR;
}
if (flash->virtual_memory != (chipaddr)ERROR_PTR) {
programmer_unmap_flash_region(flash, (void *)flash->virtual_memory, size);
flash->physical_memory = 0;
flash->virtual_memory = (chipaddr)ERROR_PTR;
}
}
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