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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2021 Aidan MacDonald
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef __BOOT_X1000_H__
#define __BOOT_X1000_H__
#include "x1000/cpm.h"
#include <stdbool.h>
enum {
BOOT_OPTION_ROCKBOX = 0,
BOOT_OPTION_OFW_PLAYER,
BOOT_OPTION_OFW_RECOVERY,
};
enum {
/* 3 bits to store the boot option selected by the SPL */
BOOT_OPTION_MASK = 0x7,
BOOT_OPTION_SHIFT = 0,
/* Set after running clk_init() and setting up system clocks */
BOOT_FLAG_CLK_INIT = (1 << 31),
/* Set by the SPL if it was loaded over USB boot */
BOOT_FLAG_USB_BOOT = (1 << 30),
};
/* Note: these functions are inlined to minimize SPL code size.
* They are private to the X1000 early boot code anyway... */
static inline void cpm_scratch_set(uint32_t value)
{
/* TODO: see if this holds its state over a WDT reset */
REG_CPM_SCRATCH_PROT = 0x5a5a;
REG_CPM_SCRATCH = value;
REG_CPM_SCRATCH_PROT = 0xa5a5;
}
static inline void init_boot_flags(void)
{
cpm_scratch_set(0);
}
static inline bool get_boot_flag(uint32_t bit)
{
return (REG_CPM_SCRATCH & bit) != 0;
}
static inline void set_boot_flag(uint32_t bit)
{
cpm_scratch_set(REG_CPM_SCRATCH | bit);
}
static inline void clr_boot_flag(uint32_t bit)
{
cpm_scratch_set(REG_CPM_SCRATCH & ~bit);
}
static inline void set_boot_option(int opt)
{
uint32_t r = REG_CPM_SCRATCH;
r &= ~(BOOT_OPTION_MASK << BOOT_OPTION_SHIFT);
r |= (opt & BOOT_OPTION_MASK) << BOOT_OPTION_SHIFT;
cpm_scratch_set(r);
}
static inline int get_boot_option(void)
{
uint32_t r = REG_CPM_SCRATCH;
return (r >> BOOT_OPTION_SHIFT) & BOOT_OPTION_MASK;
}
#endif /* __BOOT_X1000_H__ */
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